1.0V Micropower, SOT23, Operational Amplifier

Industry's First +1V Micropower SOT23 Op Amp

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The MAX4289 micropower, operational amplifier is optimized for ultra-low supply voltage operation. The amplifier consumes only 9µA of quiescent supply current and is fully specified for operation from a single 1.0V to 5.5V power supply. This ultra-low voltage operation together with the low quiescent current consumption make the MAX4289 ideal for use in battery-powered systems operated from as little as a single alkaline cell. The MAX4289 also features a wide input common-mode range that includes the ground, and an output voltage swing that is virtually rail-to-rail, allowing almost all of the power supply to be used for signal voltage.

The low input offset voltage and low input bias current specifications along with the high open-loop gain make the MAX4289 well-suited to applications requiring a high degree of precision.

The MAX4289 is available in a tiny 6-pin SOT23 package. All specifications are guaranteed over the extended temperature range of -40°C to +85°C.
MAX4289: Pin Configurations MAX4289: Pin Configurations Enlarge+

Key Features

  • Ultra-Low Voltage Operation: Guaranteed Specifications from 1.0V to 5.5V
  • Input Common-Mode Range: 0 to (VCC - 0.2V)
  • Ultra-Low Power Consumption: 9µA Supply Current (typ)
  • Optimized for Operation from Single-Cell Battery-Powered Systems
  • Compatible with 3.0V and 5.0V Single-Supply Systems
  • Low Offset Voltage: 0.2mV
  • Low Input Bias Current: 5nA
  • High Open-Loop Voltage Gain: 90dB
  • Rail-to-Rail Output Stage Drives 5kΩ Load
  • No Output Phase Reversal for Overdriven Inputs
  • Available in a Tiny 6-Pin SOT23 (3mm x 3mm)


  • Air Battery
  • Battery-Powered Instrumentation
  • Cellular Handsets
  • Cellular Phones
  • Digital Cameras (DIGICAMs)
  • Glucose Meters
  • GPS Solutions
  • Hearing Aids Using Zinc
  • IP Camera
  • MP3 and Portable Media Players
  • Notebook Computers
  • Portable Communication Devices
  • Portable Electronic Equipment
  • Sensor Amplifiers
  • Single-Cell Systems
  • Strain Gauges

See parametric specs for Operational Amplifiers (175)

Part NumberAmps.Rail to RailICC per Amp.
Unity Gain BW
typminmaxmaxtyptypmaxtypSee Notes
MAX4289 1Output Only915.520008575150.017
SOIC (N)/8
$1.12 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
Request Reliability Report for: MAX4289 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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