High-Voltage, Precision, Low-Power Op Amps

Excellent Combination of Low Power and Precision in a Small Package

Please check latest availability status for a specific part variant.


The MAX9943/MAX9944 is a family of high-voltage amplifiers that offers precision, low drift, and low power consumption.

The MAX9943 (single) and MAX9944 (dual) op amps offer 2.4MHz of gain-bandwidth product with only 550µA of supply current per amplifier.

The MAX9943/MAX9944 family has a wide power supply range operating from ±3V to ±19V dual supplies or a 6V to 38V single supply.

The MAX9943/MAX9944 are ideal for sensor signal conditioning, high-performance industrial instrumentation and loop-powered systems (e.g., 4mA–20mA transmitters).

The MAX9943 is offered in a space-saving 6-pin TDFN or 8-pin µMAX® package. The MAX9944 is offered in an 8-pin SO or an 8-pin TDFN package. These devices are specified over the -40°C to +125°C automotive temperature range.
MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems Enlarge+

Key Features

  • Wide 6V to 38V Supply Range
  • Low 100µV (max) Input Offset Voltage
  • Low 0.4µV/°C Offset Drift
  • Unity Gain Stable with 1nF Load Capacitance
  • 2.4MHz Gain-Bandwidth Product
  • 550µA Supply Current
  • 20mA Output Current
  • Rail-to-Rail Output
  • Package Options
    • 3mm x 5mm, 8-Pin µMAX or 3mm x 3mm, 6-Pin TDFN Packages (Single)
    • 5mm x 6mm, 8-Pin SO or 3mm x 3mm, 8-Pin TDFN Packages (Dual)


  • Amplifiers
  • Automatic Test Equipment (ATE)
  • Displays: Industrial, Front Panel, and Instrumentation
  • High-Performance ADC/DAC Input/Output
  • High-Voltage ATE
  • Industrial Instrumentation
  • Industrial: Process Measurement and Control
  • Loop-Powered Systems
  • Panel Meters
  • Power Meters
  • Programmable Logic Controllers (PLCs)
  • Sensor Interfaces

See parametric specs for Operational Amplifiers (175)

Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX9943 1Output Only638550100125130902.40.3517.6
$1.08 @1k
MAX9944 2
SOIC (N)/8
$1.65 @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.

MAX9943EVKIT: Evaluation Kit for the MAX9943
Product Reliability Reports: MAX9944.pdf 
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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