Ultra-Small, Ultra-Thin, 4-Bump Op Amp

Industry's Smallest and Thinnest Op Amp (0.9mm x 0.9mm x 0.5mm)

Please check latest availability status for a specific part variant.


The MAX44281 is the industry's first op amp in a 4-bump WLP package, designed for use in portable consumer and medical applications. This device is offered as a noninverting amplifier with gain (AV) of +1V/V, +2V/V, or +10V/V.

The device features rail-to-rail output, low 100µV input voltage offset, and 15MHz of bandwidth with only 700µA of supply current.

The device features shutdown functionality by pulling VDD to ground. During shutdown, both the input and the output are high impedance.

The device is available in an ultra-small, 0.85mm x 0.85mm, 4-bump WLP package with 0.5mm height. It is specified over the -40°C to +125°C temperature range.
MAX44281: Typical Application Circuit MAX44281: Typical Application Circuit Enlarge+

Key Features

  • 4-Pin Amplifier Saves Board Space
    • 0.85mm x 0.85mm 4-Bump Thin WLP Package
    • Three Gain Versions Available
      • 1V/V (MAX44281O)
      • 2V/V (MAX44281V)
      • 10V/V (MAX44281U)
  • Precision Specifications Support Most Precision Applications
    • Low 100μV Input Offset Voltage
    • Rail-to-Rail Output
    • 10pA Input Bias Current
    • 15MHz GBW
  • Low Power Consumption Extends Battery Life in Portable Applications
    • 700μA Supply Current
    • Shutdown Input Through VDD
    • 1.8V to 5.5V Supply Range


  • 3G/4G Handsets
  • Battery-Powered Devices
  • General-Purpose Signal Processing
  • Notebooks
  • Portable Medical Devices
  • Sensor Interfaces
  • Transimpedance Amplifiers

See parametric specs for Operational Amplifiers (175)

Part NumberAmps.Rail to RailAV
ICC per Amp.
Unity Gain BW
Slew Rate
typminmaxmaxtypmaxtyptyp<See Notes
MAX44281 1Output Only
$0.79 @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.

MAX44281OEVKIT: Evaluation Kit for the MAX44281O
MAX44281UEVKIT: Evaluation Kit for the MAX44281
MAX44281VEVKIT: Evaluation Kit for the MAX44281V
Request Reliability Report for: MAX44281 
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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