max4237EUT-T ,SOT23 / Very High Precision / 3V/5V Rail-to-Rail Op AmpsELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8)(V = +2.4V to +5.5V, V = 0, V = 0, V = V /2, R = 100kΩ ..
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MAX4237BESA-max4237EUT-T
SOT23 / Very High Precision / 3V/5V Rail-to-Rail Op Amps
General DescriptionThe MAX4236/MAX4237 are high-precision op amps
that feature an exceptionally low offset voltage and off-
set voltage temperature coefficient without using any
chopper techniques. The MAX4236 and MAX4237 have
a typical large-signal, open-loop voltage gain of 120dB.
These devices have an ultra-low input-bias current of
1pA. The MAX4236 is unity-gain stable with a gain-
bandwidth product of 1.7MHz, while the MAX4237 is
stable for closed-loop gains greater than 5V/V with a
gain-bandwidth product of 7.5MHz. Both devices have
a shutdown function in which the quiescent current is
reduced to less than 0.1µA, and the amplifier output is
forced into a high-impedance state.
The input common-mode range of the MAX4236/
MAX4237 extends below the negative supply range, and
the output swings Rail-to-Rail®. These features make the
amplifiers ideal for applications with +3V or +5V single
power supplies. The MAX4236/MAX4237 are specified for
the extended temperature range (-40°C to +85°C) and
are available in tiny SOT23, µMAX, and SO packages. For
greater accuracy, the A grade µMAX and SO packages
are tested to guarantee 20µV (max) offset voltage at
+25°C and less then 2µV/°C drift.
ApplicationsStrain Gauges
Piezoelectric Sensors
Thermocouple Amplifiers
Electrochemical Sensors
Battery-Powered Instrumentation
Instrumentation Amplifiers
FeaturesUltra-Low Offset Voltage
20µV (max) at +25°C (Grade A)
50µV (max) at +25°C (Grade B, 6-Pin SOT23)Ultra-Low Offset Voltage Drift
2µV/°C (max) (Grade A)
4.5µV/°C (max) (Grade B, 6-Pin SOT23)
5.5µV/°C (max) (6-Pin SOT23)Ultra-Low 1pA Input Bias CurrentHigh Open-Loop Voltage Gain: 110dB (min)
(RL= 100kΩ)Compatible with +3V and +5V Single-Supply
Power SystemsGround Sensing: Input Common-Mode Range
Includes Negative RailRail-to-Rail Output Swing into a 1kΩLoad350µA Quiescent CurrentGain-Bandwidth Product
1.7MHz (MAX4236, AV= 1V/V)
7.5MHz (MAX4237, AV= 5V/V)200pF Capacitive Load Handling CapabilityShutdown Mode: 0.1µA Quiescent Current,
Places Output in a High-Impedance StateAvailable in Space-Saving SOT23 and µMAX
Packages
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-to-Rail Op Amps
Pin Configurations
Ordering Information19-2110; Rev 0; 8/01
Rail-to-Rail is a registered trademark of Nippon Motorola, Inc.
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op Amps
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
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- VEE)......................................-0.3V to +6V
Analog Input Voltage (IN+ or IN-)....(VEE- 0.3V) to (VCC+ 0.3V)
Logic Input Voltage (SHDN)............(VEE- 0.3V) to (VCC+ 0.3V)
Current into Any Pin............................................................20mA
Output Short-Circuit Duration....Continuous to Either VCCor VEE
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23-6 (derate 8.7mW/°C above +70°C).........696mW
8-Pin µMAX (derate 4.5mW/°C above +70°C)..............362mW
8-Pin SO (derate 5.9mW/°C above +70°C)...................471mW
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
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op Amps
ELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8) (continued)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
values are at VCC= +5V and TA= +25°C.) (Note 1)
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op Amps
ELECTRICAL CHARACTERISTICS (SO-8 and µMAX-8) (continued)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
values are at VCC= +5V and TA= +25°C.) (Note 1)
ELECTRICAL CHARACTERISTICS (SOT23-6)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
values are at VCC= +5V and TA= +25°C.) (Note 1)
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op Amps
ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
values are at VCC= +5V and TA= +25°C.) (Note 1)
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op AmpsVOS DISTRIBUTION
MAX
4236 toc01
VOS (μV)
PERCENT OF UNITS (%)
TCVOS DISTRIBUTIONMAX4236 toc02
TCVOS (μV/°C)
PERCENT OF UNITS (%)
OFFSET VOLTAGE vs. TEMPERATURE
MAX4236 toc02
OFFSET VOLTAGE (
TEMPERATURE (°C)
Typical Operating Characteristics(VCC= +5V, VEE= 0, VCM= VCC/2, RL= 100kΩto VCC/2, TA= +25°C, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (SOT23-6) (continued)(VCC= +2.4V to +5.5V, VEE= 0, VCM= 0, VOUT= VCC/2, RL= 100kΩto VCC/2, TA= TMINto TMAX, unless otherwise noted. Typical
Note 1:All devices are 100% production tested at TA= +25°C; all specifications over temperature are guaranteed by design,
unless otherwise specified.
Note 2:Guaranteed by design, not production tested.
Note 3:Maxim specification limits for the temperature coefficient of the offset voltage (TCVOS) are 100% tested for the A-grade, 8-
pin SO and µMAX packages.
MAX4236/MAX4237
SOT23, Very High Precision, 3V/5V
Rail-To-Rail Op AmpsCOMMON-MODE REJECTION RATIO
vs. COMMON-MODE INPUT VOLTAGE
MAX4236 toc04
COMMON-MODE INPUT VOLTAGE (V)
COMMON-MODE REJECTION RATIO (dB)
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (VCC = 5V)
MAX4236 toc06
FREQUENCY (kHz)
COMMON-MODE REJECTION RATIO (dB)
0.011010010000.1110,000
COMMON-MODE REJECTION RATIO
vs. FREQUENCY (VCC = 3V)MAX4236 toc07
FREQUENCY (kHz)
COMMON-MODE REJECTION RATIO (dB)
0.011010010000.1110,000
0.1110100100010,000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY (VCC = 5V)
MAX4236 toc08
FREQUENCY (kHz)
PSSR (dB)
0.0011010000.10.01110010,000100,000
MAX4237
OPEN-LOOP GAIN/PHASE
vs. FREQUENCY MAX4236 toc09
FREQUENCY (kHz)
GAIN (dB)
PHASE (DEGREES)
Typical Operating Characteristics (continued)(VCC= +5V, VEE= 0, VCM= VCC/2, RL= 100kΩto VCC/2, TA= +25°C, unless otherwise noted.)
0.0011010000.10.01110010,000
MAX4236
OPEN-LOOP GAIN/PHASE
vs. FREQUENCY MAX4236 toc10
GAIN (dB)
PHASE (DEGREES)
INPUT VOLTAGE NOISE vs. FREQUENCY
MAX4236 toc11
INPUT VOLTAGE NOISE (nV
Hz)
0.000110010k100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCYMAX4236 toc12
THD + NOISE (%)
COMMON-MODE REJECTION RATIO
vs. COMMON-MODE INPUT VOLTAGE
MAX4236 toc05
COMMON-MODE INPUT VOLTAGE (V)
COMMON-MODE REJECTION RATIO (dB)
