MAX4237:SOT23, Very High Precision, 3V/5V Rail-to-Rail Op Amps

The MAX4236/MAX4237 are high-precision op amps that feature an exceptionally low offset voltage and offset 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.

Key Features
  • Ultra-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 Current
  • High Open-Loop Voltage Gain: 110dB (min) (RL = 100kΩ)
  • Compatible with +3V and +5V Single-Supply Power Systems
  • Ground Sensing: Input Common-Mode Range Includes Negative Rail
  • Rail-to-Rail Output Swing into a 1kΩ Load
  • 350µA Quiescent Current
  • Gain-Bandwidth Product
    • 1.7MHz (MAX4236, AV = 1V/V)
    • 7.5MHz (MAX4237, AV = 5V/V)
  • 200pF Capacitive Load Handling Capability
  • Shutdown Mode: 0.1µA Quiescent Current, Places Output in a High-Impedance State
  • Available in Space-Saving SOT23 and µMAX Packages
MAX4236, MAX4237: Typical Application Circuit
MAX4236, MAX4237: Typical Application Circuit
  • Automatic Test Equipment (ATE)
  • Battery-Powered Applications
  • Cardiac Monitor
  • Displays: Industrial, Front Panel, and Instrumentation
  • Electrochemical Sensors
  • Industrial: Process Measurement and Control
  • Instrumentation Amplifiers
  • Panel Meters
  • Piezoelectric Sensors
  • Power Meters
  • Programmable Logic Controllers (PLCs)
  • Strain Gauges
  • Thermocouple Amplifiers
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MAX4236-MAX4237 Data SheetMAX4236-MAX4237.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Low Input Bias CMOS InputsInput IBIAS
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX42361Output Only2.45.535050103120Yes0.51.70.314µMAX/8
$0.99 @1k
$1.22 @1k
$1.00 @1k
$1.00 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4237AESANo Longer AvailableMAX4237AESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX4237AESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX4237AESA+TActiveN.SO;8 pin-40°C to +85°CSee data sheet
MAX4237AESA-TNo Longer AvailableMAX4237AESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX4237AEUANo Longer AvailableMAX4237AEUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4237AEUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX4237AEUA+TActiveuMAX;8 pin-40°C to +85°CSee data sheet
MAX4237AEUA-TNo Longer AvailableMAX4237AEUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4237BESANo Longer AvailableMAX4237BESA+SOIC(N),;8 pin;30.9 mm²-40°C to +85°CNo
MAX4237BESA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4237BESA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +85°CLead Free
MAX4237BESA-TNo Longer AvailableMAX4237BESA+TN.SO;8 pin-40°C to +85°CSee data sheet
MAX4237BEUANo Longer AvailableMAX4237BEUA+µMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4237BEUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX4237BEUA+TActiveuMAX;8 pin-40°C to +85°CSee data sheet
MAX4237BEUA-TNo Longer AvailableMAX4237BEUA+TµMAX,;8 pin;15.6 mm²-40°C to +85°CNo
MAX4237EUTNo Longer AvailableMAX4237EUT+SOT,;6 pin;9 mm²-40°C to +85°CNo
MAX4237EUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX4237EUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX4237EUT-TNo Longer AvailableMAX4237EUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
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