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MAX9943, MAX9944

High-Voltage, Precision, Low-Power Op Amps

Excellent Combination of Low Power and Precision in a Small Package
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Active: In Production.


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.

Data Sheet

Download this datasheet in PDF formatDownload Rev 3 (PDF, 612kB)
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An evaluation board is available: MAX9943EVKIT

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

Key Specifications:

Operational Amplifiers
Part Number Amps. Rail to Rail VSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
min max typ max typ typ max typ typ < See Notes
MAX9943  1 Output Only 6 38 550 100 125 130 90 2.4 0.35 17.6 $1.03 @1k
MAX9944  2 $1.57 @1k
See All Operational Amplifiers (163)

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.


MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems
Typical ±20mA Current-Source in Loop-Powered Systems

More Information

Topmark Coding MAX9943
Topmark Coding MAX9944
New Product Press Release   2009-06-03 ]

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Document Ref.: 19-4433 Rev 3; 2011-05-02
This page last modified: 2011-05-02