General Description
The MAX9201/MAX9202/MAX9203 high-speed, low-
power, quad/dual/single comparators feature TTL logic
outputs with active internal pullups. Fast propagation
delay (7ns typ at 5mV overdrive) makes these devices
ideal for fast A/D converters and sampling circuits, line
receivers, V/F converters, and many other data-discrim-
ination, signal restoration applications.
All comparators can be powered from separate analog
and digital power supplies or from a single combined
supply voltage. The analog input common-mode range
includes the negative rail, allowing ground sensing
when powered from a single supply. The MAX9201/
MAX9202/MAX9203 consume only 9mW per compara-
tor when powered from a +5V supply.
The MAX9202/MAX9203 feature output latches with TTL
compatible inputs. The comparator output states are
held when the latch inputs are driven low. The
MAX9201 provides all the same features as the
MAX9202/MAX9203 with the exception of the latches.
The MAX9201/MAX9202/MAX9203 are lower power and
lower cost upgrades to the MAX901/MAX902/MAX903
offering a 50% power savings and smaller packaging.
________________________Applications
____________________________Features
♦Fast 7ns Propagation Delay
♦Low 9mW/Comparator Power Consumption
♦Separate Analog and Digital Supplies
♦Flexible Analog Supply: +5V to +10V or ±5V
♦Input Voltage Range Includes
Negative Supply Rail
♦TTL-Compatible Outputs
♦TTL-Compatible Latch Inputs
(MAX9202/MAX9203)
♦Available in Space-Saving Packages
8-Pin SOT23 (MAX9203)
14-Pin TSSOP (MAX9202)
16-Pin TSSOP (MAX9201)
MAX9201/MAX9202/MAX9203
Low-Cost, 7ns, Low-Power
Voltage Comparators
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
14
13
12
11
10
9
8
1
2
3
4
5
6
7
VCC
N.C.
OUTB
LATCHBLATCHA
GND
INA+
INA-
MAX9202
VDD
INB+
INB-VEE
N.C.
OUTA
SO/TSSOP
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
INA- IND-
IND+
VCC
OUTD
OUTC
VDD
INC+
INC-
MAX9201
SO/TSSOP
INA+
GND
VEE
OUTA
OUTB
INB+
INB-
IN-
VEE
LATCH
1
2
8
7
VCC
IN+OUT
GND
VDD
SOT23
3
4
6
5
MAX9203
GND
LATCHVEE
1
2
8
7
VDD
OUTIN+
IN-
VCC
SO
3
4
6
5
MAX9203
Pin Configurations
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
MAX9201EUE -40°C to +85°C 16 TSSOP
MAX9201ESE -40°C to +85°C 16 Narrow SO
MAX9202EUD -40°C to +85°C 14 TSSOP
MAX9202ESD -40°C to +85°C 14 Narrow SO
MAX9203EKA-T
-40°C to +85°C 8 SOT23-8
MAX9203ESA -40°C to +85°C 8 Narrow SO
Ordering Information
High-Speed A/D
Converters
High-Speed V/F
Converters
Line Receivers
High-Speed Signal
Squaring/Restoration
Threshold Detectors
Input Trigger Circuitry
High-Speed Data
Sampling
PWM Circuits
19-1936; Rev 1; 1/05
MAX9201/MAX9202/MAX9203
Low Cost, 7ns, Low-Power
Voltage Comparators
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C,
unless otherwise noted.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and function-
al 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.
Analog Supply Voltage (VCC - VEE) .....................................+12V
Digital Supply Voltage (VDD) .................................................+7V
Differential Input Voltage..................(VEE - 0.3V) to (VCC + 0.3V)
Common Mode Input Voltage ..........(VEE - 0.3V) to (VCC + 0.3V)
Latch Input Voltage
(MAX9202/MAX9203 only) .....................-0.3V to (VDD + 0.3V)
Output Short-Circuit Duration
To GND ......................................................................Continuous
To VDD ..................................................................................1min
Continuous Power Dissipation (TA= +70°C)
8-Pin SOT23-8 (derate 9.1mW/°C above +70°C) ...727mW/°C
8-Pin SO (derate 5.9mW/°C above +70°C).............471mW/°C
14-Pin TSSOP (derate 9.1mW/°C above +70°C) ....727mW/°C
14-Pin SO (derate 8.3mW/°C above +70°C)...........667mW/°C
16-Pin TSSOP (derate 9.4mW/°C above +70°C) ....755mW/°C
16-Pin SO (derate 8.7mW/°C above +70°C)...........696mW/°C
Operating Temperature Range ...........................-45°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
Analog Supply Voltage Range
VCC - VEE
Referenced to VEE
4.75 10.5
V
Digital Supply Voltage Range VDD Referenced to GND
4.75 5.25
V
TA = +25°C14
Input Offset Voltage VOS VCM = 0,
VOUT= 1.4V TA = -40°C to +85°C 7.5 mV
TA = +25°C
1.25
5
Input Bias Current IBIIN+ or IIN- TA = -40°C to +85°C 7.0 µA
TA = +25°C50
250
Input Offset Current IOS VCM = 0,
VOUT = 1.4V TA = -40°C to +85°C
450
nA
Common-Mode Input Voltage
Range VCM Note 2
VEE - 0.1
V
C C -
2.25 V
TA = +25°C50
150
Common-Mode Rejection
Ratio
CMRR - 5.1V < V
C M
< +2.75V
V
OU T = 1.4V TA = -40°C to +85°C
250
TA = +25°C50
150
Power-Supply Rejection Ratio
PSRR Note 3 TA = -40°C to +85°C
250
Output High Voltage VOH (VIN+ - VIN-) > 250mV, ISOURCE = 1mA 3.0 3.5 V
Output Low Voltage VOL (VIN+ - VIN-) < -250mV, ISINK = 8mA
0.25
0.4 V
Latch Input Threshold Voltage
High VLH Note 4 1.4 2 V
Latch Input Threshold Voltage
Low VLL Note 4 0.8 1.4 V
Latch Input Current High ILH VLH = 3.0V, Note 4 0.5 3 µA
Latch Input Current Low ILL VLL = 0.3V, Note 4 0.5 3 µA
Input Capacitance CIN 4pF
Differential Input Impedance RIND 5MΩ
Common-Mode Input
Impedance
RINCM
5.5 MΩ
MAX9201 4.7 7
MAX9202 2.5 4.0
Positive Analog Supply
Current ICC Note 5
MAX9203 1.3 2
mA
MAX9201/MAX9202/MAX9203
Low Cost, 7ns, Low-Power
Voltage Comparators
_______________________________________________________________________________________ 3
Note 1: All devices are 100% production tested at TA= +25°C. All temperature limits are guaranteed by design.
Note 2: Inferred by CMRR test.
Note 3: Tested for +4.75V < VCC < +5.25V, and -5.25V < VEE < -4.75V with VDD = +5V, although permissible analog power-supply
range is 4.75V < VCC < +10.5V for single supply operation with VEE grounded.
Note 4: Specification does not apply to MAX9201.
Note 5: ICC tested for 4.75V < VCC < +10.5V with VEE grounded. IEE tested for -5.25V < VEE < -4.75V with VCC = +5V. IDD tested for
+4.75V < VDD < +5.25V with all comparator outputs low, worst-case condition.
Note 6: Guaranteed by design. Times are for 100mV step inputs (see propagation delay characteristics in Figures 2 and 3)
Note 7: Maximum difference in propagation delay between two comparators in the MAX9201/MAX9202.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX9201 3.4 5.0
MAX9202 1.8 3.0
Negative Analog Supply
Current I
EE
Note 5
MAX9203 1.0 1.6
mA
MAX9201 2 3.0
MAX9202 1 1.5Digital Supply Current I
DD
Note 5
MAX9203 0.5 0.8
mA
MAX9201 33 44
MAX9202 17 24
Power Dissipation P
D
V
CC
= V
DD
= +5V,
V
EE
= 0V MAX9203 9 13
mW
TIMING CHARACTERISTICS
(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at
TA= +25°C, unless otherwise noted.) (Notes 1, 6)
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, TA= -40°C to +85°C. Typical values are at TA= +25°C,
unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
TA = +25°C79
Input-to-Output High
Response Time tPD+
VOD = 5mV,
CL = 15pF,
IOUT = 2mA TA = -40°C to +85°C12
ns
TA = +25°C79
Input-to-Output Low
Response Time tPD-
VOD = 5mV,
CL = 15pF,
IOUT = 2mA TA = -40°C to +85°C12
ns
Rise Time tRCL = 15pF,
IOUT = 2mA TA = +25°C 2.0 ns
Fall Time tFCL = 15pF,
IOUT = 2mA TA = +25°C 1.0 ns
TA = +25°C 0.5 1.5
Difference in Response Time
Between Outputs ∆tPD Note 7 TA = -40°C to +85°C 2.5 ns
Latch Disable to Output High
Delay
tPD+(D)
Note 4 10 ns
Latch Disable to Output Low
Delay
tPD-(D)
Note 4 10 ns
Minimum Setup Time tSNote 4 2 ns
Minimum Hold Time tNNote 4 1 ns
Minimum Latch Disable
Pulse Width
tPW(D)
Note 4 8 ns
MAX9201/MAX9202/MAX9203
Low Cost, 7ns, Low-Power
Voltage Comparators
4 _______________________________________________________________________________________
-1.5
-0.5
-1.0
0.5
0
1.0
1.5
-40 10-15 35 60 85
INPUT OFFSET VOLTAGE vs. TEMPERATURE
MAX9201 toc01
TEMPERATURE (°C)
INPUT OFFSET VOLTAGE (mV)
2.8
3.2
3.0
3.6
3.4
3.8
4.0
046281012
OUTPUT HIGH VOLTAGE (VOH)
vs. LOAD CURRENT
MAX9201 toc03
LOAD CURRENT (mA)
OUTPUT HIGH VOLTAGE (V)
TA = -40°C
TA = +85°C
TA = +25°C
0
50
100
150
200
250
300
350
400
042681012
OUTPUT LOW VOLTAGE (VOL)
vs. LOAD CURRENT
MAX9201 toc04
LOAD CURRENT (mA)
OUTPUT LOW VOLTAGE (mV)
TA = +85°C
TA = +25°C
TA = -40°C
5.0
6.0
5.5
7.0
6.5
8.0
7.5
8.5
9.5
9.0
10.0
0 1015205 253035 4540 50
RESPONSE TIME vs. INPUT OVERDRIVE
MAX9201 toc06
INPUT OVERDRIVE (mV)
RESPONSE TIME (ns)
tPD-
tPD+
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
5678910
ICC SUPPLY CURRENT (PER COMPARATOR)
vs. VCC SUPPLY VOLTAGE
MAX9201 toc05
VCC SUPPLY VOLTAGE (V)
ICC SUPPLY CURRENT (mA)
TA = +85°C
TA = +25°C
TA = -40°C
VEE = GND
Typical Operating Characteristics
(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA= +25°C, unless otherwise noted.)
0.4
0.8
0.6
1.2
1.0
1.6
1.4
1.8
-40 10-15 35 60 85
INPUT BIAS CURRENT vs. TEMPERATURE
MAX9201 toc02
TEMPERATURE (°C)
INPUT BIAS CURRENT (µA)
VCM = 0
MAX9201/MAX9202/MAX9203
Low Cost, 7ns, Low-Power
Voltage Comparators
_______________________________________________________________________________________ 5
Typical Operating Characteristics (continued)
(VCC = +5V, VEE = -5V, VDD = +5V, GND = 0, VCM = 0, LATCH_ = logic high, VOUT = 1.4V, TA= +25°C, unless otherwise noted.)
Pin Description
6.0
7.0
6.5
8.5
8.0
7.5
9.5
9.0
10.0
0304010 20 50 60 70 80 90
RESPONSE TIME vs. LOAD CAPACITANCE
(5mV OVERDRIVE, RLOAD = 2.4kΩ)
MAX9201 toc08
LOAD CAPACITANCE (pF)
RESPONSE TIME (ns)
tPD-
tPD+
6.5
7.0
6.8
7.5
7.3
7.8
8.0
-40-30-20-100 1020304050607080 90
RESPONSE TIME vs. TEMPERATURE
(5mV OVERDRIVE)
MAX9201 toc07
TEMPERATURE (°C)
RESPONSE TIME (ns)
tPD-
tPD+
PIN
NAME
FUNCTION
1, 8, 9,
16 IN_- Negative Input (Channels A, B, C,
D)
2, 7, 10,
15 IN_+ Positive Input (Channels A, B, C,
D)
3 GND Ground
4, 5, 12,
13 OUT_ Output (Channels A, B, C, D)
6V
EE Negative Analog Supply and
Substrate
11 VDD Positive Digital Supply
14 VCC Positive Analog Supply
PIN NAME FUNCTION
1, 8 IN_- Negative Input (Channels A, B)
2, 9 IN_+ Positive Input (Channels A, B)
3 GND Ground
4, 11 LATCH_ Latch Input (Channels A, B)
5, 12 OUT_ Output (Channels A, B)
6, 13 N.C. No Connection
7V
EE Negative Analog Supply and
Substrate
10 VDD Positive Digital Supply
14 VCC Positive Analog Supply
MAX9201 MAX9202
Applications Information
Circuit Layout
Because of the large gain-bandwidth transfer function
of the MAX9201/MAX9202/MAX9203 special precau-
tions must be taken to realize their full high-speed
capability. A printed circuit board with a good, low-
inductance ground plane is mandatory. All decoupling
capacitors (the small 100nF ceramic type is a good
choice) should be mounted as close as possible to the
power-supply pins. Separate decoupling capacitors for
analog VCC and for digital VDD are also recommended.
Close attention should be paid to the bandwidth of the
decoupling and terminating components. Short lead
lengths on the inputs and outputs are essential to avoid
unwanted parasitic feedback around the comparators.
Solder the device directly to the printed circuit board
instead of using a socket.
Input Slew-Rate Requirements
As with all high-speed comparators, the high gain-band-
width product of the MAX9201/MAX9202/ MAX9203 can
create oscillation problems when the input traverses the
linear region. For clean output switching without oscilla-
tion or steps in the output waveform, the input must meet
minimum slew-rate requirements (0.5V/s typ). Oscillation
is largely a function of board layout and of coupled
source impedance and stray input capacitance. Both
poor layout and large source impedance will cause the
part to oscillate and increase the minimum slew-rate
requirement. In some applications, it may be helpful to
apply some positive feedback between the output and
positive input. This pushes the output through the transi-
tion region clearly, but applies a hysteresis in threshold
seen at the input terminals.
TTL Output and Latch Inputs
The comparator TTL output stages are optimized for
driving low-power Schottky TTL with a fan-out of four.
When the latch is connected to a logic high level, the
comparator is transparent and immediately responds to
changes at the input terminals. When the latch is con-
nected to a TTL low level, the comparator output latch-
es (in the same state) the instant that the latch
command is applied, and will not respond to subse-
quent changes at the input. No latch is provided on
the MAX9201.
6 _______________________________________________________________________________________
MAX9201/9202/9203
Low Cost, 7ns, Low-Power
Voltage Comparators
PIN
SO SOT
NAME
FUNCTION
18V
CC Positive Analog Supply
2 7 IN+ Positive Input
3 6 IN- Negative Input
45V
EE Negative Analog Supply and
Substrate
54
LATCH
Latch Input
6 3 GND Ground
7 2 OUT Output
81V
DD Positive Digital Supply
Pin Description (continued)
VEE
GND
VDD
VCC
OUT
+10V
+5V
VEE
GND
VDD
VCC
OUT
+5V
VEE
GND
VDD
VCC
OUT
+5V
+5V
-5V
Typical Power-Supply Alternatives
Figure 1a. Separate Analog Supply,
Common Ground
Figure 1b. Single +5V Supply, Common
Ground
Figure 1c. Split ±5V Supply, Separate
Ground
MAX9203
_______________________________________________________________________________________ 7
MAX9201/9202/9203
Low Cost, 7ns, Low-Power
Voltage Comparators
Power Supplies
The MAX9201/MAX9202/MAX9203 can be powered
from separate analog and digital supplies or from a sin-
gle +5V supply. The analog supply can range from +5V
to +10V with VEE grounded for single-supply operation
(Figures 1a and 1b) or from a split ±5V supply (Figure
1c). The VDD digital supply always requires +5V.
In high-speed, mixed-signal applications where a com-
mon ground is shared, a noisy digital environment can
adversely affect the analog input signal. When set up with
separate supplies, the MAX9201/MAX9202/MAX9203
isolate analog and digital signals by providing a separate
analog ground (VEE) and digital ground (GND).
Definition of Terms
VOS Input Offset Voltage: Voltage applied be-
tween the two input terminals to obtain TTL
logic threshold (+1.4V) at the output.
VIN Input Voltage Pulse Amplitude: Usually set
to 100mV for comparator specifications.
VOD Input Voltage Overdrive: Usually set to 5mV
and in opposite polarity to VIN for comparator
specifications.
tpd+ Input to Output High Delay: The propagation
delay measured from the time the input signal
crosses the input offset voltage to the TTL
logic threshold (+1.4V) of an output low to high
transition.
tpd- Input to Output Low Delay: The propagation
delay measured from the time the input signal
crosses the input offset voltage to the TTL
logic threshold (+1.4V) of an output high to low
transition.
tpd+ (D) Latch Disable to Output High Delay: The
propagation delay measured from the latch
signal crossing the TTL logic threshold
(+1.4V) in a low to high transition to the point
of the output crossing TTL threshold (+1.4V)
in a low to high transition.
tpd- (D) Latch Disable to Output Low Delay: The
propagation delay measured from the latch
signal crossing the TTL threshold (+1.4V) in a
low to high transition to the point of the output
crossing TTL threshold (+1.4V) in a high to
low transition.
tsMinimum Setup Time: The minimum time,
before the negative transition of the latch sig-
nal, that an input signal change must be pre-
sent in order to be acquired and held at the
outputs.
thMinimum Hold Time: The minimum time,
after the negative transition of the latch sig-
nal, that an input signal must remain
unchanged in order to be acquired and held
at the output.
tpw (D) Minimum Latch Disable Pulse Width: The
minimum time that the latch signal must
remain high in order to acquire and hold an
input signal change.
Figure 2. MAX9201/MAX9202/MAX9203 Diagram Figure 3. tPD+ Response Time to 5mV Overdrive
LATCH
ENABLE
INPUT
tpd tpd+ (D)
tpw (D)
tsth
VIN
VOD VOS
LATCH
COMPARE
LATCH LATCH
COMPARE
COMPARATOR
OUTPUT
1.4V
1.4V
5ns/div
OUTPUT
INPUT
VOD + 5mV
50mV/div
1V/div
0V
0V
MAX9201/9202/9203
Low Cost, 7ns, Low-Power
Voltage Comparators
Figure 4. tPD- Response Time to 5mV Overdrive Figure 5. Response-Time Setup
5ns/div
OUTPUT
INPUT
VOD + 5mV
50mV/div
1V/div
0V
0V
PRECISION
STEP
GENERATOR
INPUT TO 10X
SCOPE PROBE
(10MΩ 14pF)
VCC
OFFSET
ADJUST 100nF 100nF 10kΩ
VEE = -5V
100nF
OUTPUT TO 10X
SCOPE PROBE
(10MΩ 14pF)
1kΩ
10kΩ
10kΩ
VCC = +5V VDD = +5V
RL
2.43kΩ
D.U.T.
100nF
Figure 6. Response to 50MHz Sine Wave Figure 7. Response to 100MHz Sine Wave
5ns/div
OUTPUT
INPUT
2V/div
10mV/div
0V
0V
5ns/div
OUTPUT
INPUT
2V/div
10mV/div
0V
0V
Chip Information
MAX9201 TRANSISTOR COUNT: 348
MAX9202 TRANSISTOR COUNT: 176
MAX9203 TRANSISTOR COUNT: 116
PROCESS: Bipolar
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.
8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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