1. Products
  2. Amplifiers
  3. Operational Amplifiers (Op Amps)
  4. Low Input Bias Current Op Amps (≤100 pA)
  5. MAX4038


Features and Benefits

  • 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)

Product Details

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.


  • 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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations


Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
MAX4038EBL+ Material Declaration Reliability Data 9-WLCSP-N/A
MAX4038EBL+T Material Declaration Reliability Data 9-WLCSP-N/A
MAX4038ETA+ Material Declaration Reliability Data Thin Dual Flatpack No Leads, Exposed Pad
MAX4038ETA+T Material Declaration Reliability Data Thin Dual Flatpack No Leads, Exposed Pad
MAX4038EUA+ Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
MAX4038EUA+T Material Declaration Reliability Data Micro-MAX, Thin Shrink Small-Outline
Wafer Fabrication Data MAX4038 Reliability Data

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Buy Now Pricing

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List Pricing

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Lead Times

Please see the latest communication from our CCO regarding lead times.



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