General Description
The MAX4032 5V, 6dB video buffer with sync-tip clamp,
output sag correction, and low-power shutdown mode
is available in tiny SOT23 and SC70 packages. The
sag-corrected output of the MAX4032 is designed to
drive AC-coupled, 150Ωback-terminated video loads
in portable video applications such as digital still cams,
portable DVD players, digital camcorders, PDAs, video-
enabled cell phones, portable game systems, and
notebook computers. The sag correction feature intro-
duces low-frequency compensation that reduces the
value of the normally bulky and expensive 330µF AC-
coupling capacitor to two small, less expensive 22µF
capacitors. The input clamp positions the video wave-
form at the output and allows the MAX4032 to be used
as either an AC- or DC-coupled output driver.
The MAX4032 operates from a single +5V supply and
consumes only 6.5mA of supply current. The low-power
shutdown mode reduces the supply current to 150nA,
making the MAX4032 ideal for low-voltage, battery-
powered video applications.
The MAX4032 is available in tiny 6-pin SOT23 and
SC70 packages and is specified over the extended
-40°C to +85°C temperature range.
Applications
Portable Video/Game Systems/DVD Players
Digital Camcorders/Televisions/Still Cameras
PDAs
Video-Enabled Cell Phones
Notebook Computers
Portable/Flat-Panel Displays
Features
♦Single +5V Operation
♦Input Sync-Tip Clamp
♦AC- or DC-Coupled Output
♦Low-Power Shutdown Mode Reduces Supply
Current to 150nA
♦SAG Correction Reduces Output-Coupling
Capacitors from 330µF to 22µF
♦Available in Space-Saving SOT23 and SC70
Packages
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
________________________________________________________________ Maxim Integrated Products 1
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX4032EXT-T -40°C to +85°C 6 SC70-6 ACC
MAX4032EUT-T -40°C to +85°C 6 SOT23-6 ABSP
Ordering Information
GND
VCC
IN
16SAG
5SHDN
OUT
MAX4032
SC70/SOT23
TOP VIEW
2
34
Pin Configuration
19-3021; Rev 0; 10/03
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.
MAX4032
CLAMP
1.2kΩ
2.3kΩ
580Ω780Ω
IN
OUT
SAG
SHDN
GND
VCC
TOP VIEW
Block Diagram
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC = 5.0V, GND = 0V, CIN = 0.1µF from IN to GND, RL= infinity to GND, SAG shorted to OUT, SHDN = 5.0V, TA= -40°C to +85°C.
Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
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.
Note 1: VCLP is the input clamp voltage as defined in the DC Electrical Characteristics table.
VCC to GND............................................................. -0.3V to +6V
OUT, SAG, SHDN to GND......................... -0.3V to (VCC + 0.3V)
IN to GND (Note 1) ................................... VCLP to (VCC + 0.3V)
IN Short-Circuit Duration from -0.3V to VCLP ........................1min
Output Short-Circuit Duration to VCC or GND .......... Continuous
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 8.7mW/°C above +70°C) ...........695mW
6-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
Operating Temperature Range ..........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range VCC Guaranteed by PSRR 4.5 5.5 V
Quiescent Supply Current ICC VIN = VCLP 6.5 10 mA
Shutdown Supply Current ISHDN SHDN = 0V 0.15 1 µA
Input Clamp Voltage VCLP Input referred 0.27 0.38 0.47 V
Input Voltage Range VIN Inferred from voltage gain (Note 3) VCLP 1.45 V
Input Bias Current IBIAS VIN = 1.45V 22.5 35 µA
Input Resistance VCLP + 0.5V < VIN < VCLP + 1V 3 MΩ
Voltage Gain AVRL = 150Ω to GND, 0.5V < VIN < 1.45V
(Note 4) 1.9 2 2.1 V/V
Power-Supply Rejection Ratio PSRR 4.5V < VCC < 5.5V 60 80 dB
Output Voltage High Swing VOH RL = 150Ω to GND 4.3 4.6 V
Output Voltage Low Swing VOL RL = 150Ω to GND VCLP 0.47 V
Sourcing, RL = 20Ω to GND 45 85
Output Current IOUT Sinking, RL = 20Ω to VCC 40 85 mA
Output Short-Circuit Current ISC OUT shorted to VCC or GND 110 mA
SHDN Logic-Low Threshold VIL VCC x 0.3 V
SHDN Logic-High Threshold VIH VCC x 0.7 V
SHDN Input Current IIH, IIL 0.003 1 µA
At DC 4
Shutdown Output Impedance ROUT
(
Disabled
)
SHDN = 0V At 3.58MHz or
4.43MHz 2kΩ
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
_______________________________________________________________________________________ 3
Note 2: All devices are 100% production tested at TA= +25°C. Specifications over temperature limits are guaranteed by design.
Note 3: Voltage gain (AV) is referenced to the clamp voltage, i.e., an input voltage of VIN = VCLP + VI would produce an output volt-
age of VOUT = VCLP + AVx VI.
Note 4: Droop is guaranteed by the input bias current specification.
AC ELECTRICAL CHARACTERISTICS
(VCC = 5.0V, GND = 0V, COUT = CSAG = 22µF, CIN = 0.1µF, RIN = 75Ωto GND, RL= 150Ωto GND, SHDN = 5.0V, TA= +25°C,
unless otherwise noted.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Small-Signal -3dB Bandwidth BWSS VOUT = 100mVP-P 55 MHz
Large-Signal -3dB Bandwidth BWLS VOUT = 2VP-P 45 MHz
Small-Signal 0.1dB Gain Flatness BW0.1dBSS VOUT = 100mVP-P 18 MHz
Large-Signal 0.1dB Gain Flatness BW0.1dBLS VOUT = 2VP-P 17 MHz
Slew Rate SR VOUT = 2V step 275 V/µs
Settling Time to 0.1% tSVOUT = 2V step 25 ns
Power-Supply Rejection Ratio PSRR f = 100kHz 50 dB
Output Impedance ZOUT f = 5MHz 2.5 Ω
Differential Gain DG NTSC 0.4 %
Differential Phase DP NTSC 0.6 Degrees
Group Delay D/dT f = 3.58MHz or 4.43MHz 20 ns
Peak Signal to RMS Noise SNR VIN = 1VP-P, 10MHz BW 65 dB
Droop CIN = 0.1µF (Note 4) 2 3 %
SHDN Enable Time tON VIN = VCLP + 1V, SHDN = 5V, VOUT settled
to within 1% of the final voltage 250 ns
SHDN Disable Time tOFF VIN = VCLP + 1V, SHDN = 0V, VOUT settled
to below 1% of the output voltage 50 ns
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
4 _______________________________________________________________________________________
Typical Operating Characteristics
(VCC = 5.0V, GND = 0V, COUT = CSAG = 22µF, CIN = 0.1µF, RIN = 75Ωto GND, RL= 150Ωto GND, SHDN = VCC, TA= +25°C,
unless otherwise noted.)
SMALL-SIGNAL GAIN
vs. FREQUENCY
MAX4032 toc01
FREQUENCY (Hz)
GAIN (dB)
10M1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k 100M
AV = 2
VOUT = 100mVP-P
SMALL-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4032 toc02
FREQUENCY (Hz)
GAIN (dB)
10M1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k 100M
AV = 2
VOUT = 100mVP-P
LARGE-SIGNAL GAIN
vs. FREQUENCY
MAX4032 toc03
FREQUENCY (Hz)
GAIN (dB)
10M1M
-5
-4
-3
-2
-1
0
1
2
3
-6
100k 100M
AV = 2
VOUT = 2VP-P
LARGE-SIGNAL GAIN FLATNESS
vs. FREQUENCY
MAX4032 toc04
FREQUENCY (Hz)
GAIN (dB)
10M1M
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
-0.6
100k 100M
AV = 2
VOUT = 2VP-P
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4032 toc05
FREQUENCY (Hz)
PSRR (dB)
10M1M100k
-70
-60
-50
-40
-30
-20
-10
0
-80
10k 100M
QUIESCENT SUPPLY CURRENT
vs. TEMPERATURE
MAX4032 toc06
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
7550250-25
6.35
6.40
6.45
6.50
6.55
6.60
6.65
6.70
6.75
6.80
6.30
-50 100
CLAMP VOLTAGE
vs. TEMPERATURE
MAX4032 toc07
TEMPERATURE (°C)
VCLAMP (V)
7550-25 0 25
0.25
0.30
0.35
0.40
0.45
0.50
0.55
0.60
0.20
-50 100
VOLTAGE GAIN vs. TEMPERATURE
MAX4032 toc08
TEMPERATURE (°C)
GAIN (V/V)
7550250-25
1.95
2.00
2.05
2.10
1.90
-50 100
OUTPUT VOLTAGE HIGH SWING
vs. TEMPERATURE
MAX4032 toc09
TEMPERATURE (°C)
OUTPUT VOLTAGE HIGH (V)
7550250-25
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5.0
4.0
-50 100
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
_______________________________________________________________________________________ 5
LARGE-SIGNAL PULSE RESPONSE
MAX4032 toc10
VOUT
1V/div
VIN
500mV/div
10ns/div
SMALL-SIGNAL PULSE RESPONSE
MAX4032 toc11
VOUT
50mV/div
VIN
25mV/div
10ns/div
DIFFERENTIAL GAIN AND PHASE
-0.8
0.4
DIFFERENTIAL
PHASE (°)
DIFFERENTIAL
GAIN (%)
MAX4032 toc12
0123456
0123456
-0.2
1.0
0.8
0.6
0.4
0.2
0
0.2
0
-0.2
-0.4
-0.6
MAX4032
Typical Operating Characteristics (continued)
(VCC = 5.0V, GND = 0V, COUT = CSAG = 22µF, CIN = 0.1µF, RIN = 75Ωto GND, RL= 150Ωto GND, SHDN = VCC, TA= +25°C,
unless otherwise noted.)
Pin Description
PIN NAME FUNCTION
1 OUT Video Output
2 GND Ground
3 IN Video Input
4V
CC
Power-Supply Voltage. Bypass with a 0.1µF
capacitor to ground as close to the pin as
possible.
5SHDN Shutdown. Pull SHDN low to place the
MAX4032 in low-power shutdown mode.
6 SAG Sag Correction
Typical Application Circuit
MAX4032
CLAMP
IN
OUT
SAG
GND
VCC
SHDN
CSAG
COUT
RL
RIN
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
6 _______________________________________________________________________________________
Detailed Description
The MAX4032 5V, 6dB video buffer with sync-tip
clamp, output sag correction, and low-power shutdown
mode is available in tiny SOT23 and SC70 packages.
The sag-corrected output of the MAX4032 is designed
to drive AC-coupled, 150Ωback-terminated video
loads in portable video applications such as digital still
cams, portable DVD players, digital camcorders,
PDAs, video-enabled cell phones, portable game sys-
tems, and notebook computers. The sag correction
feature introduces low-frequency compensation that
reduces the value of the normally bulky and expensive
330µF AC-coupling capacitor to two small, less expen-
sive 22µF capacitors. The input clamp positions the
video waveform at the output and allows the MAX4032
to be used as either an AC- or DC-coupled output driver.
The MAX4032 operates from a single 5V supply and
consumes only 6.5mA of supply current. The low-power
shutdown mode reduces the supply current to 150nA,
making the MAX4032 ideal for low-voltage, battery-
powered video applications.
The input signal to the MAX4032 is AC-coupled through
a capacitor into an active sync-tip clamp circuit, which
places the minimum of the video signal at approximate-
ly 0.38V. The output buffer amplifies the video signal
while still maintaining the 0.38V clamp voltage at the
output. For example, if VIN = 0.38V, then VOUT = 0.38V.
If VIN = (0.38V + 1V) = 1.38V, then VOUT = (0.38V + 2 X
(1V)) = 2.38V when SAG is shorted OUT.
There are two common output connections for the
MAX4032:
1) SAG is shorted to OUT and 150Ωis directly con-
nected from OUT to ground (see Figure 2).
2) Two capacitors and 150Ωare connected between
OUT, SAG, and ground (see Figure 3).
Sag Correction
Sag correction refers to the low-frequency compensa-
tion of the highpass filter formed by the 150Ωload of a
back-terminated coax and the output-coupling capaci-
tor. This break point must be low enough in frequency
to pass the Vertical Sync Interval (<25Hz for PAL and
<30Hz for NTSC) to avoid Field Tilt. Traditionally, the
break point is made <3~5Hz, and the coupling capaci-
tor must be very large, typically >330µF. The MAX4032
reduces the value of this coupling capacitor, replacing
it with a pair of 22µF capacitors. This is done by putting
a resistor network in series with the feedback, raising
the gain, and creating a high-impedance node at the
SAG output. This node is AC-coupled to the load in par-
allel with the normal output, as shown in Figure 3. This
allows the use of two smaller capacitors (COUT and
CSAG), typically 22µF, substantially reducing the size of
the interface caps and their cost while retaining the low-
frequency response.
The minimum value of the output-coupling capacitor is
a function of the acceptable Field Tilt. In Figure 1, the
Field Tilt is given for several values of capacitance from
10µF to 47µF for comparison. Although values lower
than 22µF may have acceptable Field Tilt, they are not
recommended, since tolerance, aging, and voltage
and temperature coefficients reduce the capacitance in
actual applications. Increasing the output-
coupling capacitors beyond 47µF does not improve
performance.
Shutdown Mode
The MAX4032 features a low-power shutdown mode
(ISHDN = 150nA) for battery-powered/portable applica-
tions. Pulling the SHDN pin high enables the output.
Connecting the SHDN pin to ground (GND) disables
the output and places the MAX4032 into a low-power
shutdown mode.
Applications Information
Input Coupling the MAX4032
The MAX4032 input must be AC-coupled because the
input capacitor stores the clamp voltage. The MAX4032
requires a typical value of 0.1µF for the input clamp to
meet the Line Droop specification. A minimum of a
ceramic capacitor with an X7R temperature coefficient is
recommended to avoid temperature-related problems
with Line Droop. For extended temperature operation,
such as outdoor applications, or where the impressed
Figure 1. Field Tilt vs. Output-Coupling Capacitance
FIELD TIME DISTORTION
IN % PEAK TO PEAK (%)
COUPLING CAPACITANCE (µF)
100
20
40
60
80
10 20 30 40 50
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
_______________________________________________________________________________________ 7
Figure 2. DC-Coupling the MAX4032
MAX4032
CLAMP
IN
OUT
SAG
GND
VCC
SHDN
RL
75Ω
RIN
75Ω
CBYP
0.1µF
ROUT
75Ω
VCC = 5V
CIN
0.1µF
RSOURCE
75Ω
ESIGNAL
EOUT
Figure 3. AC-Coupling the MAX4032
MAX4032
CLAMP
IN
OUT
SAG
GND
VCC
SHDN
RL
75Ω
RIN
75Ω
CBYP
0.1µF
ROUT
75Ω
VCC = 5V
CIN
0.1µF
RSOURCE
75Ω
ESIGNAL
EOUT
CSAG
22µF
COUT
22µF
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
8 _______________________________________________________________________________________
voltage is close to the rated voltage of the capacitor, a
film dielectric is recommended. Increasing the capaci-
tor value slows the clamp capture time. Values above
0.5µF should be avoided since they do not improve the
clamp’s performance.
The active sync-tip clamp also requires that the input
impedance seen by the input capacitor be less than
100Ωtypically to function properly. This is easily met by
the 75Ωinput resistor prior to the input-coupling capac-
itor and the back termination from a prior stage.
Insufficient input resistance to ground causes the
MAX4032 to appear to oscillate. Never operate the
MAX4032 in this mode.
Output Coupling the MAX4032
The output of the MAX4032 can be AC- or DC-coupled
to the load. In the DC-coupled mode, the MAX4032
provides accurate sync-tip clamping for single-supply
operation and still can drive a 150Ω, back-terminated
load. In the AC-coupled mode, the MAX4032 allows the
use of minimal size capacitors to drive a back-terminat-
ed video load of 150Ω.
DC-Coupling the Output
By shorting SAG to OUT, the device becomes an ampli-
fier with DC restore, optimally placing the video within
the dynamic range of the output. In this mode, the
MAX4032 can be used as the input conditioner for a
video signal, providing gain and biasing in single-sup-
ply applications. DC-coupling also improves the
MAX4032’s performance in terms of differential gain
and phase. This reflects the improvement in the low-fre-
quency response due to DC-coupling.
AC-Coupling the Output
The MAX4032’s output is configured to support AC-
coupling with minimal capacitance. This is called “sag
correction.” It refers to the improved bandwidth
achieved by using two smaller capacitors to replace a
single large capacitor shown in Figure 3.
Layout and Power-Supply Bypassing
The MAX4032 operates from a single 5V supply.
Bypass the supply with a 0.1µF capacitor as close to
the pin as possible. Maxim recommends using
microstrip and stripline techniques to obtain full band-
width. To ensure that the PC board does not degrade
the device’s performance, design it for a frequency
greater than 1GHz. Pay careful attention to inputs and
outputs to avoid large parasitic capacitance. Whether
or not you use a constant-impedance board, observe
the following design guidelines:
•Do not use wire-wrap boards; they are too inductive.
•Do not use IC sockets; they increase parasitic capac-
itance and inductance.
•Use surface-mount instead of through-hole compo-
nents for better, high-frequency performance.
•Use a PC board with at least two layers; it should be
as free from voids as possible.
•Keep signal lines as short and as straight as possible.
Do not make 90°turns; round all corners.
Chip Information
TRANSISTOR COUNT: 755
PROCESS: BiCMOS
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
_______________________________________________________________________________________ 9
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
SC70, 6L.EPS
MAX4032
5V, 6dB Video Buffer with Sync-Tip Clamp,
Output Sag Correction, and 150nA Shutdown Current
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.
10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
6LSOT.EPS
F1
1
21-0058
PACKAGE OUTLINE, SOT-23, 6L
