MAX4037:Low IBIAS, +1.4V/800nA, Rail-to-Rail Op Amps with +1.2V Buffered Reference

Low IBIAS +1.4V/800nA, Rail-to-Rail Op Amplifiers with +1.2V Buffered Reference

The single MAX4036/MAX4037 and dual MAX4038/MAX4039 operational amplifiers operate from a single +1.4V to +3.6V (without reference) or +1.8V to +3.6V (with reference) supply and consume only 800nA of supply current per amplifier, and 1.1µA for the optional reference. The MAX4036/MAX4038 feature a common-mode input voltage range from 0V to VDD - 0.4V at VDD = 1.4V. The MAX4037/MAX4039 feature a 1.232V voltage reference capable of sourcing 100µA and sinking 20µA. The MAX4036–MAX4039s' rail-to-rail outputs drive 5kΩ loads to within 25mV of the rails. Ultra-low supply current, low operating voltage, and rail-to-rail outputs make the MAX4036–MAX4039 ideal for use in single-cell lithium-ion (Li+), or two-cell NiCd/NiMH/alkaline battery-powered applications. The MAX4036 is available in an SC70 package, the MAX4037 in a SOT23 package, and the MAX4038/MAX4039 in UCSP™, µMAX®, and TDFN packages.

Key Features
  • Ultra-Low 800nA per Amplifier Supply Current
  • Ultra-Low 1.4V Supply Voltage Operation (1.8V for MAX4037/MAX4039)
  • Rail-to-Rail Outputs Drive 5kΩ and 5000pF Load
  • 1.232V ±0.5%, 120ppm/°C (max) Reference (MAX4037/MAX4039)
  • No External Reference Bypass Capacitor Required
  • No Phase Reversal for Overdriven Inputs
  • Low 1.0pA (typ) Input Bias Current
  • Low 200µV Input Offset Voltage
  • Unity-Gain Stable
  • Available in Tiny UCSP, SC70, SOT23, TDFN, and µMAX Packages
  • Available in -40°C to +125°C Temperature Range (MAX4036A/MAX4038A)
MAX4036, MAX4037, MAX4038, MAX4039: Typical Operating Circuit
MAX4036, MAX4037, MAX4038, MAX4039: Typical Operating Circuit
  • Active Badges
  • Battery-Powered/Solar-Powered Systems
  • Cellular Handsets
  • Digital Cameras (DIGICAMs)
  • Electrometer Amplifiers
  • Glucose Meters
  • GPS Solutions
  • IP Camera
  • Micropower Thermostats and Potentiostats
  • MP3 and Portable Media Players
  • Pagers and Cell Phones
  • pH Meters
  • Portable Medical Instrumentation
  • Remote Sensor Amplifiers
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MAX4036-MAX4039 Data SheetMAX4036-MAX4039.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Low Input Bias CMOS InputsInput IBIAS
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX40361Output Only1.43.60.820007082Yes0.010.0040.0004500SC-70/5$0.69 @1k
MAX403711.984SOT/6$0.93 @1k
$1.10 @1k
$1.24 @1k
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4037EUT+ActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX4037EUT+TActiveSOT,;6 pin;9 mm²-40°C to +85°CLead Free
MAX4037EUT-TNo Longer AvailableMAX4037EUT+TSOT,;6 pin;9 mm²-40°C to +85°CNo
MAX4036-MAX4039.pdf MAX4039
MAX4036-MAX4039.pdf MAX4039