19-1569; Rev 8; 9/13
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
MAX9038–MAX9043/
MAX9050–MAX9053
General Description
The MAX9038–MAX9043 and MAX9050–MAX9053 fea-
ture combinations of low-power comparators and preci-
sion voltage references. Their operating voltage range
makes them ideal for both 3V and 5V systems. The
MAX9039/MAX9040/MAX9041/MAX9050/MAX9051
have a single comparator and reference consuming
only 40µA of supply current. The MAX9042/MAX9043/
MAX9052/MAX9053 have dual comparators and one
reference, and consume only 55µA of supply current.
Low-voltage operation and low supply current make
these devices ideal for battery-operated systems.
The comparators feature rail-to-rail inputs and outputs,
with a common-mode input voltage range that extends
250mV beyond the supply rails. Input bias current is
typically 1.0pA, and input offset voltage is typically
0.5mV. Internal hysteresis ensures clean output switch-
ing, even with slow-moving input signals. The output
stage features a unique design that limits supply cur-
rent surges while switching, virtually eliminating supply
glitches typical of many other comparators. This design
also minimizes overall power consumption under
dynamic conditions. The comparator outputs have rail-
to-rail, push-pull output stages except the MAX9038
has an open-drain output that sinks and sources up to
8mA. The propagation delay is 400ns, even with the
low-operating supply current.
The reference output voltage is set to 1.23V in the
MAX9038/MAX9039, to 2.048V in the MAX9040–
MAX9043, and to 2.500V in the MAX9050–MAX9053.
The MAX9040–MAX9043 and the MAX9050–MAX9053
are offered in two grades: an A grade with 0.4% initial
accuracy and 6ppm/°C tempco, and a B grade with 1%
initial accuracy (except MAX9038/MAX9039 have an
initial accuracy of ±0.4%) and 100ppm/°C tempco. The
voltage references feature a proprietary curvature-cor-
rection circuit and laser-trimmed thin-film resistors.
These series-mode references can sink or source up to
500µA of load current.
Applications
Features
oComparator + Precision Reference in UCSP/SOT23
o2.5V to 5.5V Single-Supply Operation
(MAX9038–MAX9043)
oLow Supply Current (MAX9038/MAX9039/MAX9040/
MAX9041/MAX9050/MAX9051)
40µA Quiescent
50µA with 100kHz Switching
Open-Drain Output MAX9038
o400ns Propagation Delay
oRail-to-Rail Inputs
oRail-to-Rail Output Stage Sinks and Sources 8mA
oInternal ±3mV Hysteresis
oVoltage Reference Offers
±0.4% (max) Initial Accuracy (A Grade)
6ppm/°C (typ) Temperature Coefficient (A Grade)
Stable for 0 to 4.7nF Capacitive Loads
Ordering Information
UCSP is a trademark of Maxim Integrated Products, Inc.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit and Functional Diagrams appear
at end of data sheet.
Ordering Information continued at end of data sheet.
Selector Guide appears at end of data sheet.
TOP VIEW (BUMPS ON BOTTOM) TOP VIEW
V
EE
REFIN+
1
+
5V
CC
OUT
MAX9040
MAX9050
SOT23
2
34
IN-
V
CC
REF
VEE
IN+
MAX9038
MAX9039
B3
OUT
B1
A3
A2
A1
B2
UCSP
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX9038BABT+T -40°C to +125°C 6 UCSP ADW
MAX9039BEBT+T -40°C to +85°C 6 UCSP AAZ
MAX9040AEUK+T -40°C to +85°C 5 SOT23 ADNW
MAX9040BEUK+T -40°C to +85°C 5 SOT23 ADNX
MAX9041AEUT+T -40°C to +85°C 6 SOT23 AAHF
MAX9041BEUT+T -40°C to +85°C 6 SOT23 AAHH
MAX9041AESA -40°C to +85°C 8 SO —
MAX9041BESA -40°C to +85°C 8 SO —
Pin Configurations
Pin Configurations continued at end of data sheet.
Precision Battery
Management
Window Comparators
IR Receivers
Level Translators
Digital Line Receivers
2Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—A Grade (0.4% Initial Accuracy)
(VCC = +5V, VEE = 0V, VCM = 0V, IOUT = 0A, IREF = 0A, TA= TMIN to TMAX, unless otherwise noted. Typical values are at
TA= +25°C.) (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.
Supply Voltage (VCC to VEE) ....................................-0.3V to +6V
OUT (MAX9038) .......................................................-0.3V to +6V
All Other Pins ...................................(VEE - 0.3V) to (VCC + 0.3V)
Current into Input Pins ......................................................±20mA
Output Short-Circuit Duration
(OUT_, REF) ...............Indefinite Short Circuit to Either Supply
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.10mW/°C above +70°C)..........571mW
6-Bump UCSP (derate 3.9mW/°C above +70°C) ........308mW
6-Pin SOT23 (derate 8.70mW/°C above +70°C)..........696mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX®(derate 4.1mW/°C above +70°C) ...........330mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW
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
Bump Reflow Temperature (Note 1) ................................+235°C
Note 1: This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device
can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom-
mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection Packaging
Reflow. Preheating is required. Hand or wave soldering is not allowed.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX9040–MAX9043 2.5 5.5
Supply Voltage Range (Note 3) VCC MAX9050–MAX9053 2.7 5.5 V
VCC = 2.7V 47 67
MAX9040/MAX9041/
MAX9050/MAX9051 VCC = 5V 52 72
VCC = 2.7V 55 80
Supply Current ICC MAX9042/MAX9043/
MAX9052/MAX9053 VCC = 5V 60 85
µA
COMPARATORS
TA = +25°C ±0.5 ±5.0
Input Offset Voltage (Note 4) VOS
Over entire
common-mode
range TA = -40°C to +85°C ±7.0
mV
Input Hysteresis VHYST ±3.0 mV
Input Bias Current
(Notes 5, 6, 7) IBSpecified common-mode range ±0.001 ±10.0 nA
Input Offset Current (Note 5) IOS Specified common-mode range ±0.5 pA
TA = +25°C VEE -
0.25
VCC +
0.25
Common-Mode Voltage Range
(Notes 5, 8) CMVR
TA = -40°C to +85°C VEE VCC
V
Common-Mode Rejection Ratio
(Note 5) CMRR Specified common-mode range 52 80 dB
MAX9040–MAX9043, 2.5V ≤ VCC ≤ 5.5V 55 80
Power-Supply Rejection Ratio PSRR MAX9050–MAX9053, 2.5V ≤ VCC ≤ 5.5V 55 80 dB
Input Capacitance (Note 5) CIN 2.5 pF
VCC = 5V 95
Output Short-Circuit Current ISC VOUT = VEE or VCC VCC = 2.7V 35 mA
VCC = 5V, ISINK = 8mA 0.2 0.55
Output Voltage Low VOL VCC = 2.7V, ISINK = 3.5mA 0.15 0.4 V
µMAX is a registered trademark of Maxim Integrated Products, Inc.
3
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
ELECTRICAL CHARACTERISTICS—A Grade (0.4% Initial Accuracy) (continued)
(VCC = +5V, VEE = 0V, VCM = 0V, IOUT = 0A, IREF = 0A, TA= TMIN to TMAX, unless otherwise noted. Typical values are at
TA= +25°C.) (Note 2)
ELECTRICAL CHARACTERISTICS—B Grade (1% Initial Accuracy) (Note 12)
(VCC = 5V, VEE = 0V, VCM = 0V, VPU = 1.8V, RPU = 10kΩ, IOUT = 0A, IREF = 0A, TA= TMIN to TMAX, unless otherwise noted. Typical
values are at TA= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
VCC = 5V, ISOURCE = 8mA 4.45 4.85
Output Voltage High VOH VCC = 2.7V, ISOURCE = 3.5mA 2.3 2.55 V
CL = 15pF 40
CL = 50pF 50Output Rise/Fall Times tR/tF
CL = 200pF 80
ns
50mV overdrive 450
Output Propagation Delay
(Note 9)
tPD+/
tPD-
CL = 15pF,
VCC = 2.7V 100mV overdrive 400 ns
Power-Up Time tPU Time to VOUT
valid logic state 20 µs
VOLTAGE REFERENCE
MAX9040–MAX9043 2.040 2.048 2.056
Output Voltage VREF TA = +25°C MAX9050–MAX9053 2.490 2.500 2.510 V
µMAX/SO 6 30
Output Voltage Temperature
Coefficient (Note 10) TCVREF SOT23 6 50 ppm/°C
2.5V ≤ VCC ≤ 5.5V, MAX9040–MAX9043 +50 +200
Line Regulation ΔVREF/
ΔVCC 2.7V ≤ VCC ≤ 5.5V, MAX9050–MAX9053 +50 +200 µV/V
Sourcing. 0µA ≤ IREF ≤ 500µA 2 4
Load Regulation ΔVREF/
ΔIREF Sinking, -500µA ≤ IREF ≤ 0µA 3.5 6 µV/µA
Output Short-Circuit Current ISC VREF = VEE or VCC 4mA
Thermal Hysteresis (Note 11) THYST 130 ppm
Long-Term Stability 1000h at TA = +25°C 50 ppm
f = 0.1Hz to 10Hz 40 µVP-P
Noise Voltage EOUT f = 10Hz to 10kHz 105 µVRMS
Ripple Rejection ΔVREF/
ΔVCC VCC = 5V ±100mV, f = 120Hz 84 dB
Turn-On Settling Time tR(VREF) To VREF = 1% of final value 200 µs
Capacitive-Load Stability Range
(Note 7) CL(VREF) 0 4.7 nF
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX9038–MAX9043 2.5 5.5
Supply Voltage Range (Note 3) VCC MAX9050–MAX5053 2.7 5.5 V
VCC = 2.7V 40
MAX9038/MAX9039/
MAX9040/MAX9041/
MAX9050/MAX9051 VCC = 5.0V 45 100
VCC = 2.7V 55
Supply Current ICC
MAX9042/MAX9043/
MAX9052/MAX5053 VCC = 5.0V 60 130
µA
4Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
ELECTRICAL CHARACTERISTICS—B Grade (1% Initial Accuracy) (Note 12) (continued)
(VCC = 5V, VEE = 0V, VCM = 0V, VPU = 1.8V, RPU = 10kΩ, IOUT = 0A, IREF = 0A, TA= TMIN to TMAX, unless otherwise noted. Typical
values are at TA= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
COMPARATOR
Input Offset Voltage (Note 4) VOS Over entire common-mode range ±1 ±9.0 mV
Input Hysteresis VHYST ±3.0 mV
Input Bias Current (Notes 5, 6, 7) IBSpecified common-mode range ±0.001 ±25.0 nA
Input Offset Current (Note 5) IOS Specified common-mode range ±0.5 pA
Common-Mode Voltage Range
(Notes 5, 8) CMVR VEE VCC V
Common-Mode Rejection Ratio
(Note 5) CMRR Specified common-mode range 52 80 dB
MAX9038–MAX9043, 2.5V ≤ VCC ≤ 5.5V 55 80
Power-Supply Rejection Ratio PSRR MAX9050–MAX9053, 2.7V ≤ VCC ≤ 5.5V 55 80 dB
Input Capacitance (Note 5) CIN 2.5 pF
VCC = 5V 95
Output Short-Circuit Current ISC VOUT = VEE or VCC VCC = 2.7V 35 mA
VCC = 5V, ISINK = 8mA 0.2 0.55
Output Voltage Low VOL VCC = 2.7V, ISINK = 3.5mA 0.15 V
VCC = 5V, ISOURCE = 8mA 4.45 4.85
Output Voltage High (Except
MAX9038) VOH VCC = 2.7V, ISOURCE = 3.5mA 2.55 V
Output Leakage MAX9038 0.5 µA
CL = 15pF 40
CL = 50pF 50Output Rise/Fall Times tR/tF
CL = 200pF 80
ns
RPU = 10kΩ, CL = 15pF, MAX9038 400
RPU = 10kΩ, CL = 50pF, MAX9038 1180Output Rise Time tR
RPU = 10kΩ, CL = 200pF, MAX9038 5580
ns
50mV overdrive 450
Output Propagation Delay
(Note 9) tPD+/tPD- CL = 15pF,
VCC = 2.7V 100mV overdrive 400 ns
RPU = 10kΩ, CL = 15pF, MAX9038 500
RPU = 10kΩ, CL = 50pF, MAX9038 1540
Output Rising Propagation
Delay (Note 9) tPD+
RPU = 10kΩ, CL = 200pF, MAX9038 3350
ns
Power-Up Time tPU Time to VOUT valid logic state 20 µs
VOLTAGE REFERENCE
MAX9038/MAX9039 (Note 12) 1.225 1.230 1.235
MAX9040–MAX9043 2.028 2.048 2.068
Output Voltage VREF TA = +25°C
MAX9050–MAX9053 2.475 2.500 2.525
V
Output Voltage Temperature
Coefficient (Note 10) TCVREF 20 100 ppm/°C
5
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
ELECTRICAL CHARACTERISTICS—B Grade (1% Initial Accuracy) (Note 12) (continued)
(VCC = 5V, VEE = 0V, VCM = 0V, VPU = 1.8V, RPU = 10kΩ, IOUT = 0A, IREF = 0A, TA= TMIN to TMAX, unless otherwise noted. Typical
values are at TA= +25°C.) (Note 2)
Note 2: All devices are 100% production tested at TA= +25°C. Limits over the extended temperature range are guaranteed by
design.
Note 3: Supply voltage range guaranteed by PSRR test on comparator and line regulation of REF.
Note 4: VOS is defined as the center of the input-referred hysteresis band.
Note 5: For the comparators with the inverting input (IN-) uncommitted.
Note 6: Input bias current is the average of the inverting and noninverting input bias currents.
Note 7: Not production tested. Guaranteed by design.
Note 8: Guaranteed by CMRR test.
Note 9: VOVERDRIVE is beyond the offset and hysteresis determined trip point.
Note 10: Temperature coefficient is measured by the box method; i.e., the maximum ΔVREF is divided by the maximum ΔT.
Note 11: Thermal hysteresis is defined as the change in VREF at +25°C before and after cycling the device from TMIN to TMAX.
Note 12: MAX9038/MAX9039 has an initial accuracy of ±0.4%.
Typical Operating Characteristics
(VCC = 5V, VEE = 0V, VCM = 0V, VPU = 1.8V, RPU = 10kΩ, IOUT = 0A, IREF = 0A, TA= +25°C, unless otherwise noted.)
0
10
30
20
50
40
60
-40 0-20 20 40 60 80
MAX9039/MAX9040/MAX9041/MAX9050/MAX9051
SUPPLY CURRENT vs. TEMPERATURE
MAX9038 toc01
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VCC = 5.0V
VIN+ > VIN-
VCC = 2.7V
0
10
30
20
50
40
60
-40 0-20 20 40 60 80
MAX9042/MAX9043/MAX9052/MAX9053
SUPPLY CURRENT vs. TEMPERATURE
MAX9038 toc02
TEMPERATURE (°C)
SUPPLY CURRENT (µA)
VCC = 5.0V
VIN+ > VIN-
VCC = 2.7V
0.01 0.1 1 10 100 1000
200
150
100
50
0
MAX9039/MAX9040/MAX9041/MAX9050/MAX9051
SUPPLY CURRENT vs. SWITCHING FREQUENCY
MAX9038 toc03
SWITCHING FREQUENCY (kHz)
SUPPLY CURRENT (µA)
VCC = 5.0V
VCC = 2.7V
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT
MAX9038–MAX9043 +50 +200
Line Regulation ΔVREF/
ΔVCC 2.5V ≤ VCC ≤ 5.5V MAX9050–MAX9053 +50 +200 µV/V
Sourcing: 0µA ≤ IREF ≤ 500µA 2 4
Load Regulation ΔVREF/
ΔIREF Sinking: -500µA ≤ IREF ≤ 0µA 3.5 6 µV/µA
Output Short-Circuit Current ISC VREF = VEE or VCC 4mA
Thermal Hysteresis (Note 11) THYST 130 ppm
Long-Term Stability 1000h at TA = +25°C 100 ppm
Ripple Rejection ΔVREF/
ΔVCC VCC = 5V ±100mV, f = 120Hz 84 dB
Turn-On Settling Time tR( V
RE F) To VREF = 1% of final value 200 µs
Capacitive Load Stability
Range (Note 7) C
L( V
RE F) 0 4.7 nF
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = 0V, VPU = 1.8V, RPU = 10kΩ, VCM = 0V, IOUT = 0A, IREF = 0A, TA= +25°C, unless otherwise noted.)
MAX9038
SUPPLY CURRENT
vs. SWITCHING FREQUENCY
MAX9038 toc03a
FREQUENCY (Hz)
SUPPLY CURRENT (µA)
10k100
10
20
30
40
50
60
70
80
0
11M
VCC = 2.7V
VCC = 5V
250
0.01 0.1 1 10 100 1000
200
150
100
50
0
MAX9042/MAX9043/MAX9052/MAX9053
SUPPLY CURRENT vs. SWITCHING FREQUENCY
MAX9038 toc04
SWITCHING FREQUENCY (kHz)
SUPPLY CURRENT (μA)
VCC = 5.0V
VCC = 2.7V
10,000
1000
100
10
1
0.1
0.01 1 100.1
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
MAX9038 toc05
OUTPUT SINK CURRENT (mA)
VOL (mV)
VCC = 5.0V
VIN+ < VIN-
VCC = 2.7V
6Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
10,000
1000
100
10
1
0.1
0.01 1 100.1
OUTPUT HIGH VOLTAGE
vs. OUTPUT SOURCE CURRENT
MAX9038 toc06
OUTPUT SOURCE CURRENT (mA)
OUTPUT HIGH VOLTAGE (VCC - VOH) (mV)
VCC = 5.0V
VIN+ > VIN-
VCC = 2.7V
MAX9038
OUTPUT LOW VOLTAGE
vs. OUTPUT SINK CURRENT
MAX9038 toc05a
OUTPUT SINK CURRENT (mA)
SUPPLY CURRENT (µA)
15
510
50
100
150
200
250
300
0
020
0
20
60
40
80
100
-40 -20 0 20 40 60 80
OUTPUT SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
MAX9038 toc08
TEMPERATURE (°C)
OUTPUT SINK CURRENT (mA)
VCC = 5.0V
VIN- > VIN+
OUT SHORTED TO VCC
VCC = 2.7V
0
40
20
60
100
80
120
-40 0-20 20 40 60 80
OUTPUT SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
MAX9038 toc07
TEMPERATURE (°C)
OUTPUT SOURCE CURRENT (mA)
VCC = 5.0V
VIN+ > VIN-
OUT SHORTED TO VEE
VCC = 2.7V
7
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = 0V, VPU = 1.8V, RPU = 10kΩ, VCM = 0V, IOUT = 0A, IREF = 0A, TA= +25°C, unless otherwise noted.)
MAX9038–MAX9043/
MAX9050–MAX9053
MAX9038
OUTPUT SHORT-CIRCUIT CURRENT
vs. TEMPERATURE
MAX9038 toc08a
TEMPERATURE (°C)
SHORT-CIRCUIT TEMPERATURE (mA)
100
50
40
20
60
80
140
120
100
160
0
0150
VCC = 2.7V
VCC = 5V
350
400
450
500
550
600
0 400200 600 800100 500300 700 900 1000
PROPAGATION DELAY
vs. CAPACITIVE LOAD (VCC = 2.7V)
MAX9038 toc09
CAPACITIVE LOAD (pF)
tPD (ns)
tPD+ TO VOUT = 50%
OF FINAL VALUE
tPD- TO VOUT = 50%
OF FINAL VALUE
tPD+ TO VOUT = 10%
OF FINAL VALUE
tPD- TO VOUT = 10%
OF FINAL VALUE
VOD = 50mV
300
400
350
500
450
600
550
650
0 400200 600 800100 500300 700 900 1000
PROPAGATION DELAY
vs. CAPACITIVE LOAD (VCC = 5V)
MAX9038 toc10
CAPACITIVE LOAD (pF)
tPD (ns)
tPD+ TO VOUT = 50%
OF FINAL VALUE
tPD- TO VOUT = 50%
OF FINAL VALUE
tPD+ TO VOUT = 10%
OF FINAL VALUE
tPD- TO VOUT = 10%
OF FINAL VALUE
VOD = 50mV
200
400
300
600
500
800
700
900
08040 120 16020 10060 140 180 200
PROPAGATION DELAY
vs. INPUT OVERDRIVE
MAX9038 toc10b
INPUT OVERDRIVE (mV)
tPD (ns)
tPD+, VCC = 5.0V
tPD-, VCC = 2.7V
tPD-, VCC = 5.0V
tPD+, VCC = 2.7V
350
300
450
400
600
550
500
650
-40 0-20 20 40 60 80
PROPAGATION DELAY
vs. TEMPERATURE
MAX9038 toc10a
TEMPERATURE (°C)
tPD (ns)
tPD+ TO VOUT = 50%
OF FINAL VALUE
tPD- TO VOUT = 50%
OF FINAL VALUE
tPD+ TO VOUT = 10%
OF FINAL VALUE
tPD- TO VOUT = 10%
OF FINAL VALUE
VOD = 50mV
B
A
100ns/div
PROPAGATION DELAY (tPD-)
MAX9038 toc12
A = IN+, 50mV/div
B = OUT, 2V/div
B
A
100ns/div
PROPAGATION DELAY (tPD+)
MAX9038 toc11
A = IN+, 50mV/div
B = OUT, 2V/div
8Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = 0V, VPU = 1.8V, RPU = 10kΩ, VCM = 0V, IOUT = 0A, IREF = 0A, TA= +25°C, unless otherwise noted.)
B
C
A
100ns/div
SWITCHING CURRENT (OUT RISING EDGE)
MAX9038 toc13
A = IN+, 100mV/div
B = OUT, 5V/div
C = ICC, 1mA/div
B
C
A
100ns/div
SWITCHING CURRENT (OUT FALLING EDGE)
MAX9038 toc14
A = IN+, 100mV/div
B = OUT, 5V/div
C = ICC, 1mA/div
B
A
5μs/div
POWER-UP DELAY (OUT)
MAX9038 toc15
A = VCC, 2V/div
B = OUT, 1V/div
0
0.001
0.002
0.003
02.01.50.5 1.0 2.5 3.0 3.5 4.0 4.5 5.0
INPUT BIAS CURRENT
vs. INPUT VOLTAGE
MAX9038 tco17
VIN+ (V)
INPUT BIAS CURRENT (nA)
VIN- = 2.0V
IB+
IB-
B
C
A
100μs/div
POWER-UP DELAY (REF)
MAX9038 toc16
A = VCC, 2V/div
B = REF, 1V/div
C = REF, 50mV/div, 2.048V OFFSET
MAX9039
REFERENCE OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX9038 toc19
TEMPERATURE (°C)
OUTPUT VOLTAGE CHANGE (mV)
8060
40
20
0-20
-2
-1
0
1
-3
-40
THREE TYPICAL PARTS
NORMALIZED TO +25°C
-1.00
-0.50
-0.75
0
-0.25
0.75
0.50
0.25
1.00
-40 0-20 20 40 60 80
MAX904_/MAX905_
REFERENCE OUTPUT VOLTAGE
TEMPERATURE DRIFT
MAX9038 toc18
TEMPERATURE (°C)
OUTPUT VOLTAGE CHANGE (mV)
THREE TYPICAL PARTS
NORMALIZED TO +25°C
9
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
-1500
-500
-1000
500
0
1500
1000
2000
-500 -100-300 100 300 500
LOAD REGULATION
MAX9038 toc21
LOAD CURRENT (μA)
REFERENCE OUTPUT VOLTAGE CHANGE (μV)
TA = +25°C
TA = +85°C
TA = -40°C
Pin Description
-200
-100
-150
0
-50
100
50
150
2.5 3.5 4.03.0 4.5 5.0 5.5
LINE REGULATION
MAX9038 toc20
INPUT VOLTAGE (V)
REFERENCE OUTPUT VOLTAGE CHANGE (μV)
TA = +25°C
TA = +85°C
TA = -40°C
FUNCTION
MAX9042
MAX9052
MAX9038
MAX9039
MAX9043
MAX9053
Comparator Output
Negative Supply Voltage
Comparator Noninverting Input
Reference Voltage Output
Comparator A Output
No Connection. Not internally connected.
Comparator Inverting Input
Positive Supply Voltage
Comparator A Inverting Input
Comparator B Output
Comparator B Inverting Input
Comparator B Noninverting Input
Comparator A Noninverting Input
NAME
SO
6
4
3
1
—
5, 8
2
7
—
—
—
—
—
SO/µMAX
—
4
—
2
1
—
—
8
—
7
6
5
3
OUT
VEE
IN+
REF
OUTA
N.C.
IN-
VCC
INA-
OUTB
INB-
INB+
INA+
SOT23 µMAX
A2 1 —
A1 2 5
UCSP
B1 3 —
B3 5 2
— — 1
— — 9
B2 4 —
A3 610
— — 3
— — 8
— — 7
— — 6
— — 4
MAX9041
MAX9051
PIN
MAX9040
MAX9050
1
2
SOT23
3
4
—
—
—
5
—
—
—
—
—
Typical Operating Characteristics (continued)
(VCC = 5V, VEE = 0V, VPU = 1.8V, RPU = 10kΩ, VCM = 0V, IOUT = 0A, IREF = 0A, TA= +25°C, unless otherwise noted.)
10 Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
Detailed Description
The MAX9038–MAX9043 and MAX9050–MAX9053 feature
single/dual, low-power, low-voltage comparators and a
precision voltage reference. They operate from a single
2.5V to 5.5V (MAX903_/MAX904_) or 2.7V to 5.5V
(MAX905_) supply. The single compa rators with refer-
ence, (MAX9038/MAX9039/MAX9040/MAX9041/MAX9050/
MAX9051 consume only 40µA of supply current, while
the dual comparators with reference (MAX9042/
MAX9043/MAX9052/MAX9053) consume only 55µA of
supply current. Their common-mode input range
extends 0.25V beyond each rail. Internal hysteresis
ensures clean output switching, even with slow-moving
input signals.
The output stage employs a unique design that minimizes
supply current surges while switching, virtually eliminating
the supply glitches typical of many other comparators.
Large internal output drivers allow rail-to-rail output swing
that can sink and source up to 8mA of current.
The precision reference uses a proprietary curvature-
correction circuit and laser-trimmed thin-film resistors,
resulting in a temperature coefficient of less than
30ppm/°C over the extended temperature range and initial
accuracy of 0.4% (A grade). The reference output voltage
is set to 1.23V in the MAX9038/MAX9039, 2.048V in the
MAX9040–MAX9043, and to 2.500V in the
MAX9050–MAX9053.
Comparator Input Stage Circuitry
The devices’ input common-mode range extends from
(VEE - 0.25V) to (VCC + 0.25V). These comparators may
operate at any differential input voltage within these lim-
its. Input bias current is typically 1.0pA if the input volt-
age is between the supply rails. Comparator inputs are
protected from overvoltage by internal body diodes
connected to the supply rails. As the input voltage
exceeds the supply rails, these body diodes become
forward biased and begin to conduct. Consequently,
bias currents increase exponentially as the input volt-
age exceeds the supply rails.
Comparator Output Stage Circuitry
The comparators in these devices contain a unique
output stage capable of rail-to-rail operation with loads
up to 8mA. Many comparators consume orders-of-mag-
nitude more current during switching than during
steady-state operation. However, with this family of com-
parators, the supply current change during an output
transition is extremely small. The
Typical Operating
Characteristics
graph Supply Current vs. Switching
Frequency shows the minimal supply current increase
as the output switching frequency approaches 1MHz.
This characteristic reduces the need for power-supply
filter capacitors to reduce glitches created by compara-
tor switching currents. Another advantage realized in
high-speed, battery-powered applications is a substan-
tial increase in battery life. The MAX9038 is an open-
drain output comparator that can be used in logic-level
translation or many other applications where voltage
level translation is important.
Applications Information
Additional Hysteresis
These comparators have ±3mV internal hysteresis.
Additional hysteresis can be generated with two resis-
tors using positive feedback (Figure 1). Use the follow-
ing procedure to calculate resistor values:
1) Calculate the trip points of the comparator using
these formulas:
and
VTH is the threshold voltage at which the comparator
switches its output from high to low as VIN rises
above the trip point. VTL is the threshold voltage at
which the comparator switches its output from low to
high as VIN drops below the trip point.
2) The hysteresis band will be:
3) In this example, let VCC = 5V and VREF = 2.5V:
VV R
RR
TL REF
=−
+
⎛
⎝
⎜⎞
⎠
⎟
12
12
VV
VVR
RR
TH REF
CC REF
=+ −
()
+
⎛
⎝
⎜
⎜
⎜
⎞
⎠
⎟
⎟
⎟
2
12
MAX9038–MAX9043
MAX9050–MAX9053
OUT
IN+
IN-
R2
R1
VIN
VREF
VCC
VEE
VCC
Figure 1. Additional Hysteresis
VVVVR
RR
HYS TH TL CC
=−= +
⎛
⎝
⎜⎞
⎠
⎟
2
12
11
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
and
4) Select R2. In this example, we will choose 1kΩ.
5) Select VHYS. In this example, we will choose 50mV.
6) Solve for R1:
where R1 ≈ 100kΩ, VTH = 2.525V, and VTL = 2.475V.
Board Layout and Bypassing
Power-supply bypass capacitors are not typically need-
ed, but would be called for in cases where supply
impedance is high, supply leads are long, or excessive
noise is expected on the supply lines. Use 100nF
bypass capacitors under these conditions. Minimize
signal trace lengths to reduce stray capacitance.
Reference Output/Load Capacitance
The MAX9038/MAX9039/MAX904_/MAX905_ do not
require an output capacitor on REF for frequency stabil-
ity. They are stable for capacitive loads up to 4.7nF.
However, in applications where the load or the supply
can experience step changes, an output capacitor will
reduce the amount of overshoot (or undershoot) and
assist the circuit’s transient response. When an appli-
cation is not subject to transient conditions, the REF
capacitor can be omitted.
Biasing for Data Recovery
Digital data is often embedded into a bandwidth- and
amplitude-limited analog path. Recovering the data can
be difficult. Figure 2 compares the input signal to a
time-averaged version of itself. This self-biases the
threshold to the average input voltage for optimal noise
margin.
Even severe phase distortion is eliminated from the dig-
ital output signal. Be sure to choose R1 and C1 so that:
where fCAR is the fundamental carrier frequency of the
digital data stream.
f1
2R1C1
CAR >> π
0 050 5 1000
1 1000
.=+
⎛
⎝
⎜⎞
⎠
⎟
R
VVR
RR
HYS CC
=+
⎛
⎝
⎜⎞
⎠
⎟
2
12
VR
RR
TL =−
+
⎛
⎝
⎜⎞
⎠
⎟
25 1 2
12
.
VR
RR
TH =+ +
⎛
⎝
⎜⎞
⎠
⎟
25 25 2
12
..
MAX9038–MAX9043
MAX9050–MAX9053
OUT
IN+
IN-
10kΩ
0.1μF
VCC
VIN
VEE
VCC
Figure 2. Time Averaging of the Input Signal for Data Recovery
12 Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
Functional Diagrams
MAX9040
MAX9050
OUT
1
5
3
6 (A2)
7 (A3)
3 (B1)
IN+ REF
VEE 2
VCC REF
MAX9038
MAX9039
MAX9041
MAX9051
OUT
IN+
( ) MAX9038/MAX9039 UCSP BUMPS.
IN-
REF
VEE 4 (A1)
8
7
6
5
10
8
7
6
1 (B3)
2 (B2)
VCC
REF
MAX9042
MAX9052
OUTA
1
2
3
4
1
2
3
4
5
OUTB
INA+ INB-
INB+
REF
VEE
VCC
REF
MAX9043
MAX9053
OUTA
OUTB
INA+
INA- INB-
INB+
REF
VEE
VCC
REF
4
Selector Guide
PART COMPARATORS
PER PACKAGE
VREF
(V) IN- CONNECTIONS
MAX9038 1 1.230 Uncommitted
MAX9039 1 1.230 Uncommitted
MAX9040 1 2.048 REF
MAX9041 1 2.048 Uncommitted
MAX9050 1 2.500 REF
MAX9051 1 2.500 Uncommitted
MAX9042 2 2.048 REF/Uncommitted
MAX9043 2 2.048 Uncommitted/Uncommitted
MAX9052 2 2.500 REF/Uncommitted
MAX9053 2 2.500 Uncommitted/Uncommitted
13
Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
MAX9038/MAX9039
MAX9041/MAX9043
MAX9051/MAX9053
1.23V/2.048V/
2.500V
OUT
IN+
*MAX9038 ONLY
IN-
REF
VIN VCC
0.1μFRPU*
VPU*
VEE
VCC
Typical Operating Circuit
Ordering Information (continued)
Pin Configurations (continued)
VEE
IN-IN+
1
+
6V
CC
5 REF
OUT
MAX9041
MAX9051
SOT23
2
34
OUT
N.C.VEE
1
2
8
7
N.C.
VCC
IN-
IN+
REF
SO
3
4
6
5
MAX9041
MAX9051
INB-
INB+VEE
1
2
8
7
VCC
OUTBREF
INA+
OUTA
μMAX/SO
3
4
6
5
MAX9042
MAX9052
1
2
3
4
5
10
9
8
7
6
VCC
N.C.
OUTB
INB-INA+
INA-
REF
OUTA
MAX9043
MAX9053
μMAX
INB+VEE
TOP VIEW
PART TEMP RANGE PIN-
PACKAGE
TOP
MARK
MAX9042AEUA -40°C to +85°C 8 µMAX —
MAX9042BEUA -40°C to +85°C 8 µMAX —
MAX9042AESA -40°C to +85°C 8 SO —
MAX9042BESA -40°C to +85°C 8 SO —
MAX9043AEUB -40°C to +85°C 10 µMAX —
MAX9043BEUB -40°C to +85°C 10 µMAX —
MAX9050AEUK+ -40°C to +85°C 5 SOT23 ADNW
MAX9050BEUK+ -40°C to +85°C 5 SOT23 ADNY
MAX9051AEUT+ -40°C to +85°C 6 SOT23 AAHG
MAX9051BEUT+T -40°C to +85°C 6 SOT23 AAHI
MAX9051AESA -40°C to +85°C 8 SO —
MAX9051BESA -40°C to +85°C 8 SO —
MAX9052AEUA -40°C to +85°C 8 µMAX AAHG
MAX9052BEUA -40°C to +85°C 8 µMAX AAHI
MAX9052AESA -40°C to +85°C 8 SO —
MAX9052BESA -40°C to +85°C 8 SO —
MAX9053AEUB -40°C to +85°C 10 µMAX —
MAX9053BEUB -40°C to +85°C 10 µMAX —
Chip Information
PROCESS: CMOS
+
Denotes a lead(Pb)-free/RoHS-compliant package.
14 Maxim Integrated
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND
PATTERN NO.
6 UCSP B6-3 21-0097 —
5 SOT23 U5-2 21-0057 90-0174
6 SOT23 U6-2 21-0058 90-0175
8 SO S8-10F 21-0041 90-0096
8 µMAX U8-1 21-0036 90-0092
10 µMAX U10-2 21-0061 90-0330
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 ________________________________
15
© 2013 Maxim Integrated Products, Inc. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
Micropower, Single-Supply, UCSP/SOT23
Comparator + Precision Reference ICs
MAX9038–MAX9043/
MAX9050–MAX9053
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 10/99 Initial release —
1 1/00 Corrections to initial release —
2 4/00 Adding new part —
3 4/00 Increase in Max Supply Current specifications —
4 10/02 Adding UCSP package for MAX9039 —
5 10/07 Adding input current ratings in Absolute Maximum Ratings, style changes —
6 3/09 Update Chip Information, Package Information, correct MAX9053 part number,
style changes 1, 2, 10, 12–19
7 3/13 Updated the General Description, Electrical Characteristics, and the Package
Information 1, 3-5, 13
8 9/13 Added the MAX9038 and lead-free information to the data sheet. 1–15
