MAX9944:High-Voltage, Precision, Low-Power Op Amps

Excellent Combination of Low Power and Precision in a Small Package

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.

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)
MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems
MAX9943, MAX9944: Typical ±20mA Current-Source in Loop-Powered Systems
  • 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
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MAX9943-MAX9944 Data SheetMAX9943-MAX9944.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX99431Output Only638550100125130902.40.3517.6µMAX/8
$1.03 @1k
$1.57 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9944ASA+ActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX9944ASA+TActiveSOIC(N),;8 pin;30.9 mm²-40°C to +125°CLead Free
MAX9944ATA+ActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +125°CLead Free
MAX9944ATA+TActiveTDFN-EP,;8 pin;9.6 mm²-40°C to +125°CLead Free
MAX9943-MAX9944.pdf MAX9944
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MAX9944.pdf MAX9944
MAX9943-MAX9944.pdf MAX9944