For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
General Description
The MAX4180 family of current-feedback amplifiers
combines high-speed performance, low distortion,
and excellent video specifications with ultra-low-power
operation in miniature packages. They operate from
±2.25V to ±5.5V dual supplies, or from a single +5V
supply. They require only 1mA of supply current per amp-
lifier while delivering up to ±60mA of output current
drive. The MAX4180/MAX4182/MAX4183/MAX4186
are compensated for applications with a closed-loop
gain of +2 (6dB) or greater, and provide a -3dB band-
width of 240MHz and a 0.1dB bandwidth of 70MHz.
The MAX4181/MAX4184/MAX4185/MAX4187 are com-
pensated for applications with a +1 (0dB) or greater
gain, and provide a -3dB bandwidth of 270MHz and a
0.1dB bandwidth of 60MHz.
The MAX4180–MAX4187 feature 0.08%/0.03° differen-
tial gain and phase errors, a 20ns settling time to 0.1%,
and a 450V/µs slew rate, making them ideal for high-
performance video applications. The MAX4180/
MAX4181/MAX4183/MAX4185 have a low-power shut-
down mode that reduces power-supply current to 135µA
and places the outputs in a high-impedance state. This
feature makes them ideal for multiplexing applications.
The single MAX4180/MAX4181 are offered in space-
saving 6-pin SOT23 packages.
________________________Applications
Portable/Battery-Powered High-Definition
Video/Multimedia Systems Surveillance Video
Broadcast and High-Definition Professional
TV Systems Cameras
High-Speed A/D Buffers Video Switching/
Multiplexing
CCD Imaging Systems
Medical Imaging
Features
♦Ultra-Low Supply Current: 1mA per Amplifier
♦Shutdown Mode
Outputs Placed in High-Z
Supply Current Reduced to 135µA
♦Operate from a Single +5V Supply or
Dual ±5V Supplies
♦Wide Bandwidth
270MHz -3dB Small-Signal Bandwidth
(MAX4181/MAX4184/MAX4185/MAX4187)
♦450V/µs Slew Rate
♦Fast, 20ns Settling Time to 0.1%
♦Excellent Video Specifications
Gain Flatness to 70MHz
(MAX4180/MAX4182/MAX4183/MAX4186)
0.08%/0.03° Differential Gain/Phase
♦Low Distortion:
-73dBc SFDR (fC= 5MHz, VOUT = 2Vp-p)
♦Available in Tiny Surface-Mount Packages
6-Pin SOT23 (MAX4180/MAX4181)
10-Pin µMAX (MAX4183/MAX4185)
16-Pin QSOP (MAX4186/MAX4187)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
________________________________________________________________ Maxim Integrated Products 1
19-1221; Rev 3; 8/01
5
VEE
IN-
IN+
16VCC
SHDN
OUT
MAX4180
MAX4181
SOT23-6
SINGLE
TOP VIEW
2
34
Pin Configurations
Selector Guide
Pin Configurations continued at end of data sheet.
—
AAAB
TOP
MARK
8 SO
6 SOT23-6
PIN-
PACKAGE
TEMP
RANGE
-40°C to +85°C
-40°C to +85°CMAX4180ESA
MAX4180EUT-T
PART
Ordering Information continued at end of data sheet.
Ordering Information
AV≥1No4MAX4187
AV≥2No4MAX4186
AV≥1
AV≥1
AV≥2
AV≥2
AV≥1
AV≥2
OPTIMIZED
FOR
Yes
No
Yes
No
Yes
Yes
SHUTDOWN
MODE
2
2
2
2
1
1
NO. OF
AMPS
MAX4184
MAX4185
PART
MAX4182
MAX4183
MAX4180
MAX4181
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
2 _______________________________________________________________________________________
1
OUT
SIN
G
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS—Dual Supplies
(VCC = +5V, VEE = -5V, VIN+ = 0, SHDN ≥3V; TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage (VCC to VEE) .................................................12V
Analog Input Voltage.......................(VEE - 0.3V) to (VCC + 0.3V)
Differential Input Voltage.......................................................±2V
SHDN Input Voltage ........................(VEE - 0.3V) to (VCC + 0.3V)
Short-Circuit Duration (OUT to GND, VCC or VEE).....Continuous
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 7.10mW/°C above +70°C)...........571mW
8-Pin SO (derate 5.88mW/°C above +70°C).................471mW
10-Pin µMAX (derate 5.60mW/°C above +70°C) ..........444mW
14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW
16-Pin QSOP (derate 8.30mW/°C above +70°C)..........667mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
SHDN Logic High Threshold VIH VCC - 2.0 V(Notes 3, 4)
Open-Loop Transresistance
Input Bias Current
(Negative Input) IB- ±1 ±12 µA
µA
250 800
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Bias Current
(Positive Input) IB+
Input Offset-Voltage Matching ±1
±1 ±7
kΩ
Input Resistance
(Positive Input) RIN+
Input Resistance
(Negative Input) RIN- 160 Ω
Input Offset Voltage
Input Voltage Range VCM ±3.6 ±3.9 V
VOS ±1.5 ±7 mV
Input Offset-Voltage Drift TCVOS ±12 µV/°C
Common-Mode Rejection Ratio CMRR -50 -58 dB
TR
0.8 3.0 MΩ
0.3 0.9
Output Voltage Swing VSW
±3.75 ±4.0
V
±3.0 ±3.3
±3.0
Output Short-Circuit Current ISC ±80 mA
Output Resistance ROUT 0.2 Ω
Disabled Output Leakage
Current IOUT(OFF) ±0.1 ±6.0 µA
SHDN Logic Low Threshold VIL VCC - 3.0 V
CONDITIONS
-3.6V ≤VCM ≤3.6V
MAX4182–MAX4187
RL= 1kΩ, VOUT = ±3.6V
RL= 150Ω, VOUT = ±2.5V
-3.6V ≤VIN+ ≤3.6V, -1V ≤(VIN+ - VIN-) ≤1V
RL= 1kΩ
RL= 150Ω
RL= 100Ω
Guaranteed by CMRR test
VCM = 0
SHDN ≤VIL, VOUT ≤±3V (Notes 2, 4)
(Notes 3, 4)
mV
Output Current IOUT ±32 ±60 mARL= 30Ω
V
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 3
DC ELECTRICAL CHARACTERISTICS—Dual Supplies (continued)
(VCC = +5V, VEE = -5V, VIN+ = 0, SHDN ≥3V; TA= TMIN to TMAX, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
DC ELECTRICAL CHARACTERISTICS—Single Supply
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, RLto VCC/2; TA= TMIN to TMAX, unless otherwise noted. Typical values are at
TA= +25°C.) (Note 1)
PARAMETER SYMBOL MIN TYP MAX UNITS
Positive Power-Supply
Rejection Ratio PSRR+
SHDN Logic Input Bias Current IIN ±0.1 ±2.0 µA
Negative Power-Supply
Rejection Ratio PSRR- 53 62
60 71
VCC = 5V, VEE = -4.5V to -5.5V dB
Operating Supply Voltage VCC/VEE ±2.25 ±5.50 V
Quiescent Supply Current
per Amplifier IS
1.0 1.3 mA
IS(OFF) 135 180 µA
CONDITIONS
RL= ∞
VEE = -5V, VCC = 4.5V to 5.5V
Shutdown Supply Current
per Amplifier
VEE ≤SHDN ≤VCC (Note 4)
dB
SHDN = 0, RL= ∞(Note 4)
MAX418_EUT
All other packages 1.0 1.2
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Bias Current
(Positive Input) IB+
Input Offset Voltage Matching ±1 mV
Input Bias Current
(Negative Input) IB- ±1 ±12
±1 ±7
kΩ
Input Resistance
(Positive Input) RIN+
µA
Input Resistance
(Negative Input) RIN- 160 Ω
Input Offset Voltage
Input Voltage Range VCM 1.3 to 1.1 to
3.7 3.9 V
VOS ±1.5 ±7 mV
Input Offset Voltage Drift TCVOS ±12 µV/°C
Common-Mode
Rejection Ratio CMRR -50 -58 dB
TR
0.8 2.5 MΩ
0.275 0.9
CONDITIONS
1.3V ≤VCM ≤3.7V
Open-Loop
Transresistance
MAX4182–MAX4187
µA
250 800
RL= 1kΩ, VOUT = 1.2V to 3.8V
RL= 150Ω, VOUT = 1.4V to 3.6V
1.3V ≤VIN+ ≤3.7V, -1V ≤(VIN+ - VIN-) ≤1V
1.15 to 1.0 to
3.85 4.0
VCM = 2.5V
V
1.35 to 1.2 to
3.65 3.8
RL= 1kΩ
RL= 150Ω
Output Voltage Swing VSW
1.3 to
3.7
RL= 100Ω
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
4 _______________________________________________________________________________________
DC ELECTRICAL CHARACTERISTICS—Single Supply (continued)
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, RLto VCC/2; TA= TMIN to TMAX, unless otherwise noted. Typical values are at
TA= +25°C.) (Note 1)
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4180/4182/4183/4186)
(VCC = +5V, VEE = -5V, VIN = 0, SHDN ≥3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Power-Supply Rejection Ratio PSRR 60 71
Output Current IOUT ±18 ±30 mA
Output Short-Circuit Current ISC ±50 mA
Output Resistance ROUT 0.2 Ω
dBVCC = 4.5V to 5.5V
Shutdown Supply Current
per Amplifier IS(OFF)
Disabled Output
Leakage Current IOUT(OFF)±0.1 ±4.0 µA
135 180 µA
SHDN = 0, RL= ∞(Note 4)
Quiescent Supply Current
per Amplifier
SHDN Logic-Low Threshold VIL VCC -
3.0 V
CONDITIONS
IS
1.0 1.25 mARL = ∞
Operating Supply Voltage VCC 4.5 5.5 V
SHDN Logic Input Bias Current IIN ±0.1 ±2.0 µA
0 ≤SHDN ≤VCC (Note 4)
RL = 30Ω
SHDN Logic-High Threshold VIH VCC -
2.0 V
SHDN ≤VIL, 1.2V ≤VOUT ≤3.8V
(Notes 2, 4)
(Notes 3, 4)
(Notes 3, 4)
MAX418_EUT
All other packages 1.0 1.2
Third Harmonic Distortion -73 dBc
-57RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
Second Harmonic Distortion
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% tS20 ns
Slew Rate (Note 5) SR 340 450 V/µs
-83 dBc
-68
Bandwidth for 0.1dB Flatness
(Note 5) BW0.1dB
30 70 MHz
Rise/Fall Time tR, tF5ns
Spurious-Free Dynamic Range SFDR 73 dBc
RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
57
190
Small-Signal -3dB Bandwidth
(Note 5) BWSS
180 245 MHz
RL = 150Ω
<0.5dB peaking
70
Large-Signal -3dB Bandwidth BWLS 150 MHz
CONDITIONS
VOUT = 2V step, RL= 1kΩ
VOUT = 2V step, RL= 1kΩ
RL= 150Ω
RL= 1kΩ
VOUT = 2V step, RL= 1kΩ
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
RL=150Ω
RL=1kΩ
VOUT = 2Vp-p, RL= 1kΩ
Rising edge
Falling edge 315 420
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
________________________________________________________________________________________ 5
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4181/4184/4185/4187)
(VCC = +5V, VEE = -5V, VIN+ = 0, SHDN ≥3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
Differential Phase Error DP 0.01 degrees
0.48RL = 150Ω
NTSC RL = 1kΩ
Third Harmonic Distortion -57 dB
-66RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
Second Harmonic Distortion -70 dB
-73RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
66RL = 150Ω
RL = 1kΩ
205
55RL= 150Ω
RL = 150Ω
<0.5dB peaking RL = 1kΩ
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% tS21 ns
Slew Rate (Note 5) SR 250 320 V/µs
Bandwidth for 0.1dB Flatness
(Note 5) BW0.1dB
20 60 MHz
Rise/Fall Time tRand tF5ns
Spurious-Free Dynamic Range SFDR 57 dB
Small-Signal -3dB Bandwidth
(Note 5) BWSS
195 270 MHz
Large-Signal -3dB Bandwidth BWLS 90 MHz
CONDITIONS
VOUT = 2V step, RL= 1kΩ
RL= 1kΩ
VOUT = 2V step, RL= 1kΩ
fC= 5MHz, VOUT = 2Vp-p
VOUT = 2Vp-p, RL= 1kΩ
Rising edge
VOUT = 2V step, RL= 1kΩFalling edge 200 265
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4180/4182/4183/4186) (cont.)
(VCC = +5V, VEE = -5V, VIN = 0, SHDN ≥3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance
(Positive Input) CIN+ 1.5 pF
Output Impedance ZOUT 4.8 Ω
Disabled Output Capacitance COUT(OFF) 4pF
Turn-On Time from SHDN tON 40 ns
Turn-Off Time to SHDN tOFF 400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
CONDITIONS
f = 10kHzInput Noise-Voltage Density en
f = 10kHz
SHDN ≤VIL, VOUT ≤±3V (Notes 2, 4)
(Note 4)
(Note 4)
nV/√Hz
f = 10MHz, MAX4182/4183/4186
2
f = 10MHz, MAX4182/4183/4186
Off-Isolation -60 dB
SHDN ≤2V, RL= 150Ω, f = 10MHz
NTSCDifferential Phase Error DP 0.03 degrees
0.30RL = 150Ω
RL = 1kΩ
NTSCDifferential Gain Error DG 0.08 %
0.01RL = 150Ω
RL = 1kΩ
f = 10kHz
Input Noise-Current Density in
4pA/√Hz
5IN-
IN+
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
6 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4180/4182/4183/4186)
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
Differential Phase Error DP 0.01 degrees
0.35RL = 150Ω
NTSC RL = 1kΩ
Third Harmonic Distortion -72 dBc
-57RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
Second Harmonic Distortion
PARAMETER SYMBOL MIN TYP MAX UNITS
Settling Time to 0.1% tS20 ns
Slew Rate (Note 5) SR 260 340 V/µs
-80 dBc
-76
Bandwidth for 0.1dB Flatness
(Note 5) BW0.1dB
20 50 MHz
Rise/Fall Time tR and tF6ns
Spurious-Free Dynamic Range SFDR 72 dB
RL = 150Ω
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
57
165
Small-Signal -3dB Bandwidth
(Note 5) BWSS
155 210 MHz
RL = 150Ω
<0.5dB peaking
40
Large-Signal -3dB Bandwidth BWLS 110 MHz
CONDITIONS
VOUT = 2V step, RL= 1kΩ
VOUT = 2V step, RL= 1kΩ
RL= 150Ω
RL= 1kΩ
VOUT = 2V step, RL= 1kΩ
fC= 5MHz, VOUT = 2Vp-p RL = 1kΩ
RL = 150Ω
RL = 1kΩ
VOUT = 2Vp-p, RL= 1kΩ
Rising edge
Falling edge 220 300
AC ELECTRICAL CHARACTERISTICS—Dual Supplies (MAX4181/4184/4185/4187) (cont.)
(VCC = +5V, VEE = -5V, VIN+ = 0, SHDN ≥3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
f = 10kHz
Input Noise-Voltage Density en2nV/√Hz
NTSCDifferential Gain Error DG 0.09 %
0.16RL= 150Ω
RL= 1kΩ
f = 10kHz
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Noise-Current Density in
4pA/√Hz
5
Input Capacitance
(Positive Input) CIN+ 1.5 pF
Output Impedance ZOUT 4.8 Ω
Disabled Output Capacitance COUT(OFF) 4pF
Turn-On Time from SHDN tON 50 ns
Turn-Off Time to SHDN tOFF 400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
CONDITIONS
IN-
IN+
f = 10kHz
SHDN ≤VIL, VOUT ≤±3V (Notes 2, 4)
(Note 4)
(Note 4)
f = 10MHz, MAX4184/MAX4185/MAX4187
f = 10MHz, MAX4184/MAX4185/MAX4187
Off-Isolation -54 dB
SHDN ≤2V, RL= 150Ω, f = 10MHz
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 7
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4181/4184/4185/4187)
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
VOUT = 2Vp-p, RL= 1kΩ
RL = 1kΩ
RL = 150Ω
RL = 1kΩ
fC= 5MHz, VOUT = 2Vp-p
VOUT = 2V step, RL= 1kΩ
RL= 1kΩ
RL= 150Ω
VOUT = 2V step, RL= 1kΩ
CONDITIONS
MHz110BWLS
Large-Signal -3dB Bandwidth
30
<0.5dB peaking
RL = 150Ω
MHz
175 220
BWSS
Small-Signal -3dB Bandwidth
(Note 5) 170
59
RL = 1kΩ
fC= 5MHz, VOUT = 2Vp-p RL = 150Ω
dB
55
SFDRSpurious-Free Dynamic Range
ns7tR and tF
Rise/Fall Time
MHz
16 40
BW0.1dB
Bandwidth for 0.1dB Flatness
(Note 5)
-72 dBc
-61
V/µs
210 275
SRSlew Rate (Note 5)
ns22tS
Settling Time to 0.1%
UNITSMIN TYP MAXSYMBOLPARAMETER
Second Harmonic Distortion
RL = 1kΩ
fC= 5MHz, VOUT = 2Vp-p RL = 150Ω-59 dBc
-55
Third Harmonic Distortion
RL = 1kΩ
NTSC degrees
0.01
DPDifferential Phase Error 0.35RL = 150Ω
VOUT = 2V step, RL= 1kΩRising edge
Falling edge 170 215
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4180/4182/4183/4186) (cont.)
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, AV= +2V/V; see Table 1 for RFand RGvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance
(Positive Input) CIN+ 1.5 pF
Output Impedance ZOUT 4.8 Ω
Disabled Output Capacitance COUT(OFF) 4pF
Turn-On Time from SHDN tON 40 ns
Turn-Off Time to SHDN tOFF 400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
Input Noise-Voltage Density en2nV/√Hz
NTSCDifferential Gain Error
CONDITIONS
DG
f = 10kHz
0.10 %
0.03RL= 150Ω
RL= 1kΩ
f = 10kHz
Input Noise-Current Density in
f = 10kHz
SHDN ≤VIL, 1.2V ≤VOUT ≤3.8V (Notes 2, 4)
(Note 4)
4
(Note 4)
pA/√Hz
f = 10MHz, MAX4182/MAX4183/MAX4186
5
f = 10MHz, MAX4182/MAX4183/MAX4186
IN-
IN+
Off-Isolation -60 dB
SHDN ≤2V, RL= 150Ω, f = 10MHz
__________________________________________Typical Operating Characteristics
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
8 _______________________________________________________________________________________
1
OUT
SIN
G
TOP VIEW
Note 1: The MAX418_EUT is 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by
design.
Note 2: Does not include current into the external-feedback network.
Note 3: Over operating supply-voltage range.
Note 4: Specification applies to MAX4180/MAX4181/MAX4183 and MAX4185.
Note 5: The AC specifications shown are not measured in a production test environment. The minimum AC specifications given are
based on the combination of worst-case design simulations along with a sample characterization of units. These minimum
specifications are for design guidance only and are not intended to guarantee AC performance (see AC Testing/Perform-
ance). For 100% testing of those parameters, contact the factory.
4
3
2
1
-6
1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCA
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2kΩ
RL = 1kΩ
RF = RG = 680Ω
RL = 100Ω
OR
RF = RG = 820Ω
RL = 150Ω
VIN = 20mVp-p
AV = +2V/V
4
3
2
1
-6
1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCB
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2kΩ
RL = 1kΩ
RF = RG = 680Ω
RL = 100Ω
OR
RF = RG = 820Ω
RL = 150Ω
VCC = +5V
VIN = 20mVp-p
AV = +2V/V
4
3
2
1
-6
1 10010 1000
MAX4181 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCD
FREQUENCY (MHz)
GAIN (dB)
RF = 1kΩ
RL = 150Ω
OR
RF = 560Ω
RL = 100Ω
VIN = 20mVp-p
AV = +1V/V
RF = 2.4kΩ
RL = 1kΩ
AC ELECTRICAL CHARACTERISTICS—Single Supply (MAX4181/4184/4185/4187) (cont.)
(VCC = +5V, VEE = 0, VIN+ = 2.5V, SHDN ≥3V, AV= +1V/V; see Table 1 for RFvalues; TA= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Input Capacitance
(Positive Input) CIN+ 1.5 pF
Output Impedance ZOUT 4.8 Ω
Disabled Output Capacitance COUT(OFF) 4pF
Turn-On Time from SHDN tON 40 ns
Turn-Off Time to SHDN tOFF 400 ns
Power-Up Time 200 µs
Crosstalk -60 dB
Gain Matching to 0.1dB 25 MHz
Input Noise-Voltage Density en2nV/√Hz
NTSCDifferential Gain Error
CONDITIONS
DG
f = 10kHz
0.10 %
0.03RL= 150Ω
RL= 1kΩ
f = 10kHz
Input Noise-Current Density in
f = 10kHz
SHDN ≤VIL, 1.2V ≤VOUT ≤3.8V (Notes 2, 4)
(Note 4)
4
(Note 4)
pA/√Hz
f = 10MHz, MAX4184/MAX4185/MAX4187
5
f = 10MHz, MAX4184/MAX4185/MAX4187
IN-
IN+
Off-Isolation -54 dB
SHDN ≤2V, RL= 150Ω, f = 10MHz
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
_______________________________________________________________________________________ 9
-6
-5
-4
-3
-2
-1
0
1
3
2
4
1 10 1000
MAX4187 SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4180-87DD
FREQUENCY (MHz)
GAIN (dB)
100
VS = ±5V
VIN = 20mVp-p
AV = +1V/V
RF = 680Ω
RL = 100Ω
RF = 1.6kΩ
RL = 1kΩ
RF = 910Ω
RL = 150Ω
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
4
3
2
1
-6
1 10010 1000
MAX4181 SMALL-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCE
FREQUENCY (MHz)
GAIN (dB)
RF = 1kΩ
RL = 150Ω
OR
RF = 560Ω
RL = 100Ω
VCC = +5V
VIN = 20mVp-p
AV = +1V/V
RF = 2.4kΩ
RL = 1kΩ
-6
-5
-4
-3
-2
-1
0
1
3
2
4
1 10 1000
MAX4182/MAX4183 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87AA
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
100
VS = ±5V
VIN = 20mVp-p
AV = +2V/V
RF = RG = 620Ω
RL = 100Ω
RF = RG = 680Ω
RL = 150Ω
RF = RG = 1kΩ
-6
-5
-4
-3
-2
-1
0
1
3
2
4
1 10 1000
MAX4184/MAX4185 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87BB
FREQUENCY (MHz)
GAIN (dB)
100
VS = ±5V
VIN = 20mVp-p
AV = +1V/V
RF = 750Ω
RL = 150Ω
RF = 1.5kΩ
RL = 1kΩ
RF = 620Ω
RL = 100Ω
-6
-5
-4
-3
-2
-1
1
0
2
1 10 1000
MAX4186 SMALL-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
MAX4180-87CC
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
100
VS = ±5V
VIN = 20mVp-p
AV = +2V/V
RF = RG = 680Ω
RL = 100Ω
RF = RG = 750Ω
RL = 150Ω
RF = RG = 1.1kΩ
RL = 1kΩ
4
3
2
1
-6
1 10010 1000
MAX4180 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCJ
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
RF = RG = 1.2kΩ
RL = 1kΩ
OR
RF = RG = 820Ω
RL = 150Ω
AV = +2V/V
VOUT = 2Vp-p
0.4
0.3
0.2
0.1
-0.6
1 10010 1000
MAX4180 GAIN FLATNESS vs.
FREQUENCY (SINGLE & DUAL SUPPLIES)
-0.5
-0.4
-0.3
-0.1
-0.2
0
MAX1480-87 TOCF
FREQUENCY (MHz)
GAIN (dB)
VS = ±5V
RF = RG = 1.2kΩ
RL = 1kΩ
VS = ±5V
RF = RG = 820Ω
RL = 150Ω
VCC = +5V
RF = RG = 1.2kΩ
RL = 1kΩ
VCC = +5V
RF = RG = 820kΩ
RL = 150Ω
VIN = 20mVp-p
AV = +2V/V
0.4
0.3
0.2
0.1
-0.6
1 10010 1000
MAX4181 GAIN FLATNESS vs.
FREQUENCY (SINGLE & DUAL SUPPLIES)
-0.5
-0.4
-0.3
-0.1
-0.2
0
MAX1480-87 TOCH
FREQUENCY (MHz)
GAIN (dB)
VS = ±5V
RF = 2.4kΩ
RL = 1kΩ
VCC = +5V
RF = 1kΩ
RL = 150Ω
VCC = +5V
RF = 2.4kΩ
RL = 1kΩ
VS = ±5V
RF = 1kΩ
RL = 150Ω
VIN = 20mVp-p
AV = +1V/V
4
3
2
1
-6
1 10010 1000
MAX4180 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCK
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
VOUT = 1Vp-p
RF = RG = 680Ω
RL = 100Ω
RF = RG = 820Ω
RL = 150Ω
VOUT = 2Vp-p
OR
RF = RG = 1.2kΩ
RL = 1kΩ
VOUT = 2Vp-p
VCC = +5V
AV = +2V/V
-120
-110
-100
-90
-80
-70
-60
-50
-30
-40
-20
110
MAX4182 CROSSTALK
vs. FREQUENCY
MAX4180-87EE
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
VOUTB = 2Vp-p
VOUTA MEASURED
AV = +2V/V
RF = RG = 1kΩ
RL = 1kΩ
RF = RG = 680Ω
RL = 150Ω
-100
-90
-80
-70
-60
-50
-40
-30
-10
-20
0
110
MAX4187 CROSSTALK
vs. FREQUENCY
MAX4180-87HH
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
VOUTA = 2Vp-p
VOUTD MEASURED
AV = +1V/V RF = 910Ω
RL = 150Ω
RF = 1.6kΩ
RL = 1kΩ
-120
-110
-100
-90
-80
-70
-60
-50
-30
-40
-20
110
MAX4184 CROSSTALK
vs. FREQUENCY
MAX4180-87FF
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
VOUTB = 2Vp-p
VOUTA MEASURED
AV = +1V/V
RF = 750Ω
RL = 150Ω
RF = 1.5kΩ
RL = 1kΩ
-100
-90
-80
-70
-60
-50
-40
-30
-10
-20
0
110
MAX4186 CROSSTALK
vs. FREQUENCY
MAX4180-87GG
FREQUENCY (MHz)
CROSSTALK (dB)
100 300
VOUTD = 2Vp-p
VOUTA MEASURED
AV = +2V/V
RF = RG = 1.1kΩ
RL = 1kΩ
RF = RG = 750Ω
RL = 150Ω
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
4
3
2
1
-6
1 10010 1000
MAX4181 LARGE-SIGNAL GAIN
vs. FREQUENCY (DUAL SUPPLIES)
-5
-4
-3
-1
-2
0
MAX1480-87 TOCM
FREQUENCY (MHz)
GAIN (dB)
AV = +1V/V
VOUT = 2Vp-p
RF = 2.4kΩ
RL = 1kΩ
OR
VOUT = 2Vp-p
RF = 1kΩ
RL = 150Ω
VOUT = 1Vp-p
RF = 560Ω
RL = 100Ω
4
3
2
1
-6
1 10010 1000
MAX4181 LARGE-SIGNAL GAIN
vs. FREQUENCY (SINGLE SUPPLY)
-5
-4
-3
-1
-2
0
MA480-87 TOCN
FREQUENCY (MHz)
GAIN (dB)
VCC = +5V
AV = +1V/V
VOUT = 1Vp-p
RF = 560Ω
RL = 100Ω
VOUT = 2Vp-p
RF = 1kΩ
RL = 150Ω
OR
VOUT = 2Vp-p
RF = 2.4kΩ
RL = 1kΩ
0
-10
-20
-30
-90
0.10.01 101 100
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-80
-70
-50
-60
-40
MAX1480-87 TOCP
FREQUENCY (MHz)
PSRR (dB)
VCC (MAX4181)
VCC (MAX4180)
VEE (MAX4181)
VEE (MAX4181)
100
10
0.1
0.1 101 1000100
OUTPUT IMPEDANCE vs. FREQUENCY
1
MAX1480-87 TOCQ
FREQUENCY (MHz)
OUTPUT IMPEDANCE (Ω)
4
3
2
1
-6
1 10010 1000
MAX4180 SMALL-SIGNAL GAIN
vs. FREQUENCY
-5
-4
-3
-1
-2
0
MAX1480-87 TOCL
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
VS = ±5V
VIN = 20mVp-p
RL = 1kΩ
AV = +5V/V
RF = 910Ω
RG = 220Ω
AV = +10V/V
RF = 750Ω
RG = 82Ω
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 11
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
-30
-100
0.1 1 100
MAX4180 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-80
-90
-60
-70
-40
-50
MAX4180 TOC16
FREQUENCY (MHz)
DISTORTION (dBc)
10
3RD (RL = 1kΩ)
2ND (RL = 1kΩ)
2ND (RL = 150Ω)
3RD (RL = 150Ω)
3.4
3.2
2.8
2.4
2.0
1.6
1.4
100 1M1k 10k 100k 10M 100M 1G
VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
1.8
MAX4180 TOC14
FREQUENCY (Hz)
2.2
2.6
3.0
VOLTAGE-NOISE DENSITY (nV/√Hz)
45
35
25
15
5
0
100 1M1k 10k 100k 10M 100M 1G
TOTAL VOLTAGE-NOISE DENSITY
vs. FREQUENCY (INPUT REFERRED)
10
MAX4180 TOC15
FREQUENCY (Hz)
20
30
40
1.2kΩ
1.2kΩ
VIN
VOUT
VOLTAGE-NOISE DENSITY (nV/√Hz)
-30
0.1 1 100
MAX4181 HARMONIC DISTORTION
vs. FREQUENCY (DUAL SUPPLIES)
-80
-100
-90
-60
-70
-40
-50
MAX4180 TOC18
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 150Ω)
2ND (RL = 1kΩ)
3RD (RL = 150Ω)
3RD (RL = 1kΩ)
-30
0.1 1 100
MAX4180 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-80
-90
-60
-70
-40
-50
MAX4180 TOC17
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 150Ω)
2ND (RL = 1kΩ)
3RD (RL = 150Ω)
3RD (RL = 1kΩ)
-30
0.1 1 100
MAX4181 HARMONIC DISTORTION
vs. FREQUENCY (SINGLE SUPPLY)
-80
-90
-60
-70
-40
-50
MAX4180 TOC19
FREQUENCY (MHz)
DISTORTION (dBc)
10
2ND (RL = 1kΩ)
3RD (RL = 150Ω)
3RD (RL = 1kΩ)
2ND (RL = 150Ω)
0.75
1.00
1.25
95
125
155
140
110
-60 -20 0-40 20 40 60 80 100
SUPPLY CURRENT
(OPERATING & SHUTDOWN)
vs. TEMPERATURE
MA4180 TOC21
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
SHUTDOWN SUPPLY CURRENT (µA)
SHUTDOWN SUPPLY CURRENT
SUPPLY CURRENT
20
25
35
30
40
45
10 20 2515 30 35 40 45 50
TWO-TONE THIRD-ORDER INTERCEPT
vs. FREQUENCY
MAX4180 TOC20
FREQUENCY (MHz)
THIRD-ORDER INTERCEPT (dBm)
MAX4181
MAX4180
f2 = f1 + 0.1MHz
-5
-3
5
3
1
-1
-60 -20 0-40 20 40 60 80 100
OUTPUT VOLTAGE SWING
vs. TEMPERATURE
MA4180 TOC22
TEMPERATURE (°C)
OUTPUT SWING (V)
RL = 150Ω
RL = 150Ω
RL = 1kΩ
RL = 1kΩ
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
12 ______________________________________________________________________________________
3V
RL = 150Ω, RF = RG = 820Ω
GND
GND
2V
SHUTDOWN RESPONSE TIME
MAX4180/87-TOC28
100ns/div
SHDN
AV = +2V/V
VIN+ = 1VDC
RL = 1kΩ, RF = RG = 1.2kΩ
+0.5V
IN
-0.5V
+1V
OUT
-1V
MAX4180
LARGE-SIGNAL PULSE RESPONSE
MAX4180/87-TOC29
10ns/div
RL = 150Ω, RF = RG = 820Ω
+0.5V
+1V
MAX4180
LARGE-SIGNAL PULSE RESPONSE
MAX4180/87-TOC30
10ns/div
IN
OUT
-1V
-0.5V
RL = 100Ω, RF = RG = 680Ω
+0.5V
+1V
MAX4180
LARGE-SIGNAL PULSE RESPONSE
MAX4180/87-TOC31
10ns/div
IN
-0.5V
OUT
-1V
RL = 1kΩ, RF = RG = 1.2kΩ
+25mV
+50mV
MAX4180
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC32
10ns/div
IN
OUT
-50mV
-25mV
0
0.2
1.0
0.8
0.6
0.4
-60 -20 0-40 20 40 60 80 100
INPUT BIAS CURRENT
vs. TEMPERATURE
MA4180 TOC23
TEMPERATURE (°C)
INPUT BIAS CURRENT (µA)
IB-
IB+
0
1
4
3
2
-60 -20 0-40 20 40 60 80 100
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MA4180 TOC24
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
+50mV
RF = 1kΩ, RL = 150Ω
OUT
MAX4181
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC26
10ns/div
+50mV
-50mV
IN
-50mV
+10
RF = 1kΩ, VIN = VCC/2, RL = ∞
GND
GND
VOUT
VCC
+5V
POWER-ON TRANSIENT
MAX4180/87-TOC27
100µs/div
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 13
RL = 150Ω, RF = RG = 820Ω
+25mV
+50mV
MAX4180
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC33
10ns/div
IN
OUT
-50mV
-25mV
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, TA = +25°C, unless otherwise noted.)
RL = 100Ω, RF = RG = 680Ω
+25mV
+50mV
MAX4180
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC34
10ns/div
OUT
-50mV
IN
-25mV
RL = 1kΩ, RF = 2.4kΩ
+50mV
+50mV
MAX4181
SMALL-SIGNAL PULSE RESPONSE
MAX4180/87-TOC36
10ns/div
IN
OUT
-50mV
-50mV
VS = ±5V, RL = 1kΩ, RF = 2.4kΩ
+1V
+1V
MAX4181
LARGE-SIGNAL PULSE RESPONSE
MAX4180/87-TOC35
10ns/div
IN
-1V
OUT
-1V
Pin Description
MAX4180/MAX4181
MAX4180/MAX4181
4
3
SOT23-6
5
6
Inverting InputIN-2
Noninverting InputIN+3
1
2Negative Power Supply. Connect VEE to -5V or ground for
single-supply operation.
VEE
4
FUNCTIONNAME
Shutdown Input. Device is enabled when SHDN ≥(VCC - 2V)
and disabled when SHDN ≤(VCC - 3V).
SHDN
8
Positive Power Supply. Connect VCC to +5V.VCC
7
Amplifier OutputOUT6
PIN
—No Connection. Not internally connected.N.C.1, 5
SO
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
14 ______________________________________________________________________________________
MAX4186/MAX4187
_________________________________________________Pin Description (continued)
MAX4182/MAX4183/MAX4184/MAX4185
SO SO
1
µMAX
1
MAX4183
MAX4185
PIN
MAX4183
MAX4185
—
4
5, 7, 8, 10
4
Amplifier A OutputOUTA1
3
2Amplifier A Inverting InputINA-2
3
2
FUNCTIONNAME
MAX4182
MAX4184
No Connection. Not internally connected.N.C.—
Negative Power Supply. Connect VEE to -5V or ground for
single-supply operation.
VEE
4
Amplifier A Noninverting InputINA+3
—6 5 SHDNA
Shutdown Control Input for Amplifier A. Amplifier A is
enabled when SHDNA ≥(VCC - 2V) and disabled when
SHDNA ≤(VCC - 3V).
—9 6 SHDNB
Shutdown Control Input for Amplifier B. Amplifier B is
enabled when SHDNB ≥(VCC - 2V) and disabled when
SHDNB ≤(VCC - 3V).
511 7INB+ Amplifier B Noninverting Input
612 8INB- Amplifier B Inverting Input
713 9OUTB Amplifier B Output
814 10 VCC Positive Power Supply. Connect VCC to +5V.
1
2
MAX4186
MAX4187
PIN
6
5
Amplifier A OutputOUTA1
Amplifier A Inverting InputINA-2
4
3Amplifier A Noninverting InputINA+3
FUNCTIONNAME
MAX4186
MAX4187
Amplifier B Inverting InputINB-6
Amplifier B Noninverting InputINB+5
Positive Power Supply. Connect VCC to +5V.VCC
4
7 7 OUTB Amplifier B Output
—8, 9 N.C. No Connection. Not internally connected.
810 OUTC Amplifier C Output
911 INC- Amplifier C Inverting Input
10 12 INC+ Amplifier C Noninverting Input
11 13 VEE Negative Power Supply. Connect VEE to -5V or ground for
single-supply operation.
12 14 IND+ Amplifier D Noninverting Input
13 15 IND- Amplifier D Inverting Input
14 16 OUTD Amplifier D Output
QSOPSO
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 15
Detailed Description
The MAX4180–MAX4187 are ultra-low-power current-
feedback amplifiers featuring bandwidths up to
270MHz, 0.1dB gain flatness to 90MHz, and low differ-
ential gain (0.08%) and phase (0.03°) errors. These
amplifiers achieve ultra-high bandwidth-to-power ratios
with low distortion, wide signal swing, and excellent
load-driving capabilities. They are optimized for ±5V
supplies but also operate from a single +5V supply
while consuming only 1mA per amplifier. With ±60mA
output current drive capability, the devices achieve low
distortion even while driving 150Ωloads.
Wide bandwidth, low power, low differential phase and
gain error, and excellent gain flatness make the
MAX4180–MAX4187 ideal for use in portable video
equipment such as cameras, video switchers, and
other battery-powered applications. Their two-stage
design provides higher gain and lower distortion than
conventional single-stage, current-feedback topolo-
gies. This feature, combined with fast settling time,
makes these devices suitable for buffering high-speed
analog-to-digital converters (ADCs).
The MAX4180/MAX4181/MAX4183/MAX4185 have a
low-power shutdown mode that is activated by driving
the amplifiers’ SHDN input low. Placing them in shut-
down reduces quiescent supply current to 135µA (typ)
and places amplifier outputs in a high-impedance
state. These amplifiers can be used to implement a
high-speed multiplexer by connecting together the out-
puts of multiple amplifiers and controlling the SHDN
inputs to enable one amplifier and disable all the oth-
ers. The disabled amplifiers present very little load
(0.1µA leakage current and 4pF capacitance) to the
active amplifiers’ output. Note that the feedback net-
work impedance of all the disabled amplifiers must be
considered when calculating the total load on the
active amplifier output.
Application Information
Theory of Operation
The MAX4180–MAX4187 are current-feedback ampli-
fiers, and their open-loop transfer function is expressed
as a transimpedance, ∆VOUT/∆IIN, or TZ. The frequency
behavior of the open-loop transimpedance is similar to
the open-loop gain of a voltage-mode feedback
amplifier. That is, it has a large DC value and decreas-
es at approximately 6dB per octave.
Analyzing the follower with gain, as shown in Figure 1,
yields the following transfer function:
VOUT / VIN = G x [(TZ(S) / TZ(s) + G x (RIN + RF)]
where G = AVCL = 1 + (RF/ RG), and RIN = 1 /gM≅160Ω.
At low gains, G x RIN < RF. Therefore, the closed-loop
bandwidth is essentially independent of closed-loop
gain. Similarly, TZ> RFat low frequencies, so that:
Layout and Power-Supply Bypassing
The MAX4180–MAX4187 have an RF bandwidth and,
consequently, require careful board layout, including
the possible use of constant-impedance microstrip or
stripline techniques.
To realize the full AC performance of these high-speed
amplifiers, pay careful attention to power-supply bypass-
ing and board layout. The PC board should have at least
two layers: a signal and power layer on one side, and a
large, low-impedance ground plane on the other side.
The ground plane should be as free of voids as possible.
With multilayer boards, locate the ground plane on a
layer that incorporates no signal or power traces.
Regardless of whether a constant-impedance board is
used, observe the following guidelines when designing
the board:
•Do not use wire-wrap boards. They are too inductive.
•Do not use breadboards. They are too capacitive.
•Do not use IC sockets. They increase parasitic ca-
pacitance and inductance.
•Use surface-mount components rather than through-
hole components. They give better high-frequency
performance, have shorter leads, and have lower
parasitic reactances.
V
V
OUT
IN
( / )==+GRR
FG
1
VIN
RF
RG
VOUT
T2
RIN
+1
+1
MAX4180–MAX4187
Figure 1. Current-Feedback Amplifier
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
16 ______________________________________________________________________________________
•Keep lines as short and as straight as possible.
•Do not make 90°turns; round all corners.
•Observe high-frequency bypassing techniques to
maintain the amplifiers’ accuracy. The bypass cap-
acitors should include a 0.01µF to 0.1µF ceramic
capacitor between each supply pin and the ground
plane, located as close to the package as possible.
•Place a 1µF ceramic capacitor in parallel with each
0.01µF to 0.1µF capacitor as close to them as
possible.
•Place a 10µF to 15µF low-ESR tantalum at the point
of entry to the power-supply pins’ PC board. The
power-supply trace should lead directly from the
tantalum capacitor to the VCC and VEE pins.
•Keep PC traces short and use surface-mount com-
ponents to minimize parasitic inductance.
Maxim’s High-Speed Evaluation Board
Figures 2 and 3 show layouts of Maxim’s high-speed
single SOT23 and SO evaluation boards. These boards
were developed using the techniques described above.
The smallest available surface-mount resistors were
used for feedback and back-termination to minimize
their distance from the part, reducing the capacitance
associated with longer lead lengths.
SMA connectors were used for best high-frequency
performance. Because distances are extremely short,
performance is unaffected by the fact that inputs and
outputs do not match a 50Ωline. However, in applica-
tions that require lead lengths greater than one-quarter
of the wavelength of the highest frequency of interest,
use constant-impedance traces.
Fully assembled evaluation boards are available for the
MAX4180ESA.
Figure 2a. SOT23 High-Speed EV Board
Component Placement Guide—
Component Side
Figure 2b. SOT23 High-Speed EV Board
Layout—Component Side
Figure 2c. High-Speed EV Board Layout—
Solder Side
Figure 3a. SO-8 High-Speed EV Board
Component Placement Guide—
Component Side
Figure 3b. SO-8 High-Speed EV Board
Layout—Component Side
Figure 3c. SO-8 High-Speed EV Board
Layout—Solder Side
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 17
Table 1. Recommended Component Values
245
1.2k
1.2k
RL= 1kΩ
190
680
680
RL=
100Ω
-3dB BW (MHz) 190
820
820
RL= 150Ω
RG(Ω)
RF(Ω)
COMPONENT/BW
76
56
560
RL=
1kΩ/150Ω
AV= +10V/V
205
—
1k
RL=
150Ω
120 270
—
2.4k
RL= 1kΩ
130
520
RL=
1kΩ/150Ω
AV= +5V/V
200
—
560
RL=
100Ω
AV= +2V/V AV= +1V/V
MAX4180 MAX4181
AV= +2V/V
245
1k
1k
RL=
1kΩ
160
MAX4182/MAX4183
620
620
RL=
100Ω
-3dB BW
(MHz) 190
680
680
RL=
150Ω
RG(Ω)
RF(Ω)
COMPONENT/
BW AV= +2V/V
245
1.1k
1.1k
RL=
1kΩ
175
MAX4186
680
680
RL=
100Ω
190
750
750
RL=
150Ω
AV= +1V/V
270
—
1.6k
RL=
1kΩ
200
MAX4187
—
680
RL=
100Ω
205
—
910
RL=
150Ω
AV= +1V/V
270
—
1.5k
RL=
1kΩ
180
MAX4184/MAX4185
—
620
RL=
100Ω
205
—
750
RL=
150Ω
Choosing Feedback and Gain Resistors
The optimum value of the external-feedback (RF) and
gain-setting (RG) resistors used with the MAX4180–
MAX4187 depends on the closed-loop gain and the
application circuit’s load. Table 1 lists the optimum
resistor values for some specific gain configurations.
One-percent resistor values are preferred to maintain
consistency over a wide range of production lots.
Figures 4a and 4b show the standard inverting and
noninverting configurations. Note: The noninverting cir-
cuit gain (Figure 4) is 1 plus the magnitude of the
inverting closed-loop gain. Otherwise, the two circuits
are identical.
DC and Noise Errors
Several major error sources must be considered in any
op amp. These apply equally to the MAX4180–
MAX4187. Offset-error terms are given by the equation
below. Voltage and current-noise errors are root-square
summed and are therefore computed separately. In
Figure 5, the total output offset voltage is determined by
the following factors:
•The input offset voltage (VOS) times the closed-loop
gain (1 = RF / RG).
•The positive input bias current (IB+) times the source
resistor (RS) (usually 50Ωor 75Ω), plus the negative
input bias current (IB-) times the parallel combination
of RGand RF. In current-feedback amplifiers, the
input bias currents at the IN+ and IN- terminals do
not track each other and may have opposite polarity,
so there is no benefit to matching the resistance at
both inputs.
The equation for the total DC error at the output is:
The total output-referred noise voltage is:
e
R
RiR iRR e
n OUT
F
GnS nFG n()
|| =+
()
+
()
+
()
+−
1
22
2
V
OUT || =
()
+
()
()
+
[]
+
+−
IR I R R V R
R
BS B F G OS F
G
1
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
18 ______________________________________________________________________________________
The MAX4180–MAX4187 have a very low, 2nV/√Hz
noise voltage. The current noise at the positive input
(in+) is 4pA/√Hz, and the current noise at the inverting
input is 5pA/√Hz.
An example of the DC error calculations, using the
MAX4180 typical data and typical operating circuit
where RF= RG= 1.2kΩ(RF || RG= 600Ω) and
RS= 37.5Ω, gives the following:
Calculating the total output noise in a similar manner
yields:
With a 200MHz system bandwidth, this calculates to
102µVRMS (approximately 612µVp-p, choosing the six-
sigma value).
Video Line Driver
The MAX4180–MAX4187 are well suited to drive coaxi-
al transmission lines when the cable is terminated at
both ends, as shown in Figure 6. Cable-frequency
response can cause variations in the signal’s flatness.
See Table 1 for optimum RFand RGvalues.
Driving Capacitive Loads
The MAX4180–MAX4187 are optimized for AC perfor-
mance. They are not designed to drive highly capaci-
tive loads. Reactive loads decrease phase margin and
may produce excessive ringing and oscillation. Figure
7a shows a circuit that eliminates this problem. Placing
the small (usually 5Ωto 22Ω) isolation resistor, RS,
before the reactive load prevents ringing and
oscillation. At higher capacitive loads, the interaction of
the load capacitance and isolation resistor controls AC
performance. Figures 7b and 7c show the MAX4180
and MAX4181 frequency response with a 47pF capaci-
e11
4 x 10 x 37.5 5 x 10 x 255
2x10
e 4.8nV/ Hz
n(OUT)
12 212 2
92
n(OUT)
=+
()
+
+
=
−−
−
V 1x10 x37.5 2x10 x 600 1.5x10 x 1 1
V 4.1mV
OUT
OUT
66 3
=+++
=
−−
()
()
−
VIDEO
IN
VIDEO
OUT
75Ω75Ω CABLE
VIDEO LINE DRIVER
75Ω CABLE
RF
820Ω
RG
820Ω
75Ω
75Ω
+5V
-5V
MAX4180
0.1µF
0.1µF 0.1µF
Figure 6. Video Line Driver
VOUT
RG
RS
VOUT = -(RF / RG) x VIN
VIN
RF
RO
RT
MAX4180–MAX4187
Figure 4a. Inverting Gain Configuration
VOUT
RG
RS
VOUT = [1+ (RF / RG) VIN
VIN
RF
RO
RT
MAX4180–MAX4187
Figure 4b. Noninverting Gain Configuration
RG
IB-
IB+VOUT
RF
RSMAX4180–MAX4187
Figure 5. Output Offset Voltage
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 19
tive load. Note that in each case, gain peaking is
substantially reduced when the 20Ωresistor is used to
isolate the capacitive load from the amplifier output.
AC Testing/Performance
AC specifications on high-speed amplifiers are usually
guaranteed without 100% production testing. Since
these high-speed devices are sensitive to external para-
sitics introduced when automatic handling equipment is
used, it is impractical to guarantee AC parameters
through volume production testing. These parasitics are
greatly reduced when using the recommended PC
board layout (like the Maxim EV kit). Characterizing the
part in this way more accurately represents the amplifi-
er’s true AC performance. Some manufacturers guaran-
tee AC specifications without clearly stating how this
guarantee is made. The AC specifications of the
MAX4180–MAX4187 are derived through worst-case
design simulations combined with a sample characteri-
zation of 100 units. The AC performance distributions
along with the worst-case simulation results for
MAX4180 and MAX4181 are shown in Figures 8–11.
These distributions are repeatable provided that the
proper board layout and power-supply bypassing are
used (see Layout and Power-Supply Bypassing sec-
tion).
6
5
4
3
2
1
0
-4
1 10 100 1000
-2
-3
-1
FREQUENCY (MHz)
GAIN (dB)
MAX4181
VIN = 20mVp-p
AV = +1V/V
RF = 2.4kΩ
RL = 1kΩ || 47pF
RS = 20Ω
RS = 0
Figure 7c. Frequency Response with Capacitive Load (With
and Without Isolation Resistor)
Figure 7b. Frequency Response with Capacitive Load (With
and Without Isolation Resistor)
6
5
4
3
2
1
0
-4
1 10 100 1000
-2
-3
-1
FREQUENCY (MHz)
NORMALIZED GAIN (dB)
MAX4180
VIN = 20mVp-p
AV = +2V/V
RF = RG = 1.2kΩ
RL = 1kΩ || 47pF
RS = 0
RS = 20Ω
RGRF
RS
RL
CL
VIN
Figure 7a. Using an Isolation Resistor (RS) for High-Capacitive
Loads
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
20 ______________________________________________________________________________________
0
80
70
60
50
40
30
20
10
300 320 330310 340 350 360 370 380 390 400 410 420 430 440
MAX4180 FIG.8c
RISING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = ±5V
VOUT = 2V STEP
AV = +2V/V
RL = 1kΩ
100 UNITS
0
80
70
60
50
40
30
20
10
100 130 145115 160 175 190 205 220 235 250 280 310 330265 295 315 345
MAX4180 FIG.9a
-3dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = +5V
VIN = 20mVp-p
AV = +2V/V
RL = 1kΩ
100 UNITS
0
40
30
20
10
50
60
250 270 280260 290 300 310 320 330 340 350 360 370 380 400390
MAX4180 FIG.8d
FALLING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = ±5V
VOUT = 2V STEP
AV = +2V/V
RL = 1kΩ
100 UNITS
0
25
20
15
10
5
35
30
40
0203010 40 50 60 70 80 90 100 110 120 130 140
MAX4180 FIG.9b
±0.1dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = +5V
VIN = 20mVp-p
AV = +2V/V
RL = 1kΩ
100 UNITS
Figure 8d. MAX4180 Falling-Edge Slew-Rate Distribution (Dual
Supplies)
Figure 8c. MAX4180 Rising-Edge Slew-Rate Distribution (Dual
Supplies)
Figure 9a. MAX4180 -3dB Bandwidth Distribution (Single
Supply)
Figure 9b. MAX4180 ±0.1dB Bandwidth Distribution (Single
Supply)
0
20
10
50
40
30
60
100 130 145115 160 175 190 205 220 235 250 265 280 295 310 315 330 345
MAX4180 FIG.8a
-3dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = ±5V
VIN = 20mVp-p
AV = +2V/V
RL = 1kΩ
100 UNITS
0
10
5
20
15
25
0203010 40 50 60 70 80 90 100 110 120 130 140
MAX4180 FIG.8b
±0.1dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = ±5V
VIN = 20mVp-p
AV = +2V/V
RL = 1kΩ
100 UNITS
Figure 8a. MAX4180 -3dB Bandwidth Distribution (Dual Supplies) Figure 8b. MAX4180 ±0.1dB Bandwidth Distribution (Dual
Supplies)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 21
0
70
60
50
40
30
20
10
240 260 270250 340 350 360 370 380 390 400 410 420 430 440
MAX4180 FIG 9c
RISING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
VS = +5V
VOUT = 2V STEP
AV = +2V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
0
35
30
25
20
15
10
5
160 180 190170 200 210 220 230 240 250 260 270 280
MAX4180 FIG 10a
-3dB BANDWIDTH (MHz)
NUMBER OF UNITS
VS = ±5V
VIN = 20mVp-p
AV = +1V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
0
80
70
60
50
40
30
20
10
180 200 210190 220 230 240 250 260 270 280 290 310300
MAX4180 FIG 10c
RISING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
VS = ±5V
VIN = 2V STEP
AV = +1V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
0
40
30
20
10
50
60
250 270 280260 290 300 310 320 330 340 350 360 370 380 400390
MAX4180 FIG.9d
FALLING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = +5V
VOUT = 2V STEP
AV = +2V/V
RL = 1kΩ
100 UNITS
0
18
16
14
12
10
8
6
4
2
0203010 40 50 60 70 80 90 100 110 120
MAX4180 FIG 10a
±0.1dB BANDWIDTH (MHz)
NUMBER OF UNITS
VS = ±5V
VIN = 20mVp-p
AV = +1V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
VS = ±5V
VIN = 2V STEP
AV = +1V/V
RL = 1kΩ
100 UNITS
0
60
50
40
30
20
10
140 160 170150 180 190 200 210 220 230 240 250 270260
MAX4180 FIG 10d
FALLING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
Figure 9c. MAX4180 Rising-Edge Slew-Rate Distribution (Single
Supply)
Figure 9d. MAX4180 Falling-Edge Slew-Rate Distribution
(Single Supply)
Figure 10b. MAX4181 ±0.1dB Bandwidth Distribution (Dual
Supplies)
Figure 10a. MAX4181 -3dB Bandwidth Distribution (Dual
Supplies)
Figure 10c. MAX4181 Rising-Edge Slew-Rate Distribution
(Dual Supplies)
Figure 10d. MAX4181 Falling-Edge Slew-Rate Distribution
(Dual Supplies)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
22 ______________________________________________________________________________________
0
80
70
60
50
40
30
20
10
180 200 210190 220 230 240 250 260 270 280 300 310
MAX4180 FIG 11c
RISING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
290
VS = +5V
VIN = 2V STEP
AV = +1V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
0
100
90
80
70
60
50
40
30
20
10
MAX4180 FIG 11d
FALLING-EDGE SLEW RATE (V/µs)
NUMBER OF UNITS
140 160 170150 180 190 200 210 220 230 240 250 270260
VS = +5V
VIN = 2V STEP
AV = +1V/V
RL = 1kΩ
100 UNITS
SIMULATION
LOWER LIMIT
Figure 11d. MAX4181 Falling-Edge Slew-Rate Distribution
(Single Supply)
Figure 11c. MAX4181 Rising-Edge Slew-Rate Distribution
(Single Supply)
VS = +5V
VIN = 20mVp-p
AV = +1V/V
RL = 1kΩ
100 UNITS
0
50
40
30
20
10
160 180 190170 200 210 220 230 240 250 260 270 280
MAX4180 FIG 11a
-3dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
VS = +5V
VIN = 20mVp-p
AV = +1V/V
RL = 1kΩ
100 UNITS
0
30
25
20
15
10
5
0203010 40 50 60 70 80 90 100 110 120
MAX4180 FIG 11b
±0.1dB BANDWIDTH (MHz)
NUMBER OF UNITS
SIMULATION
LOWER LIMIT
Figure 11a. MAX4181 -3dB Bandwidth Distribution (Single
Supply) Figure 11b. MAX4181 ±0.1dB Bandwidth Distribution (Single
Supply)
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
______________________________________________________________________________________ 23
Pin Configurations (continued)
14
13
12
11
10
9
8
1
2
3
4
5
6
7
VCC
OUTB
INB-
INB+VEE
INA+
INA-
OUTA
MAX4183
MAX4185
N.C.
SHDNB
N.C.N.C.
SHDNA
N.C.
SO
DUAL
DUAL QUAD
14
13
12
11
10
9
8
1
2
3
4
5
6
7
OUTD
IND-
IND+
VEE
VCC
INA+
INA-
OUTA
MAX4186
MAX4187
INC+
INC-
OUTCOUTB
INB-
INB+
SO
QUAD
SINGLE
OUT
N.C.
VEE
1
2
8
7
SHDN
VCC
IN-
IN+
N.C.
SO
3
4
6
5
MAX4180
MAX4181
DUAL
INB-
INB+
VEE
1
2
8
7
VCC
OUTB
INA-
INA+
OUTA
SO
3
4
6
5
MAX4182
MAX4184
1
2
3
4
5
10
9
8
7
6
VCC
OUTB
INB-
INB+VEE
INA+
INA-
OUTA
MAX4183
MAX4185
µMAX
SHDNBSHDNA
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
OUTA OUTD
IND-
IND+
VEE
INC+
INC-
OUTC
N.C.
MAX4186
MAX4187
QSOP
INA-
INA+
INB-
VCC
INB+
OUTB
N.C.
TOP VIEW
MAX4180–MAX4187
Single/Dual/Quad, 270MHz, 1mA, SOT23,
Current-Feedback Amplifiers with Shutdown
6LSOT.EPS
Chip Information
MAX4180/MAX4181 TRANSISTOR COUNT: 83
SUBSTRATE CONNECTED TO VEE
MAX4182–MAX4185 TRANSISTOR COUNT: 166
SUBSTRATE CONNECTED TO VEE
MAX4186/MAX4187 TRANSISTOR COUNT: 235
SUBSTRATE CONNECTED TO VEE
Package Information
Ordering Information (continued)
—
—
—
—
—
—
—
—
—
—
—
AAAC
TOP
MARK
16 QSOP-40°C to +85°CMAX4187EEE
14 SO-40°C to +85°C
MAX4187ESD
16 QSOP-40°C to +85°CMAX4186EEE
14 SO-40°C to +85°C
MAX4186ESD
14 SO-40°C to +85°CMAX4185ESD
10 µMAX*-40°C to +85°C
MAX4185EUB
8 SO-40°C to +85°C
MAX4184ESA
14 SO-40°C to +85°CMAX4183ESD
10 µMAX*-40°C to +85°C
MAX4183EUB
8 SO
8 SO
6 SOT23-6
PIN-
PACKAGE
TEMP
RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MAX4182ESA
MAX4181ESA
MAX4181EUT-T
PART
*Contact factory for availability.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
