MAX44248

Description

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The MAX44244/MAX44245/MAX44248 family of parts provide ultra-precision, low-noise, zero-drift single/quad/ dual operational amplifiers featuring very low-power operation with a wide supply range. The devices incorporate a patented auto-zero circuit that constantly measures and compensates the input offset to eliminate drift over time and temperature as well as the effect of 1/f noise. These devices also feature integrated EMI filters to reduce high-frequency signal demodulation on the output. The op amps operate from either a single 2.7V to 36V supply or dual ±1.35V to ±18V supply. The devices are unity-gain stable with a 1MHz gain-bandwidth product and a low 90µA supply current per amplifier.

The low offset and noise specifications and high supply range make the devices ideal for sensor interfaces and transmitters.

The devices are available in µMAX^®, SO, SOT23, and TSSOP packages and are specified over the -40°C to +125°C automotive operating temperature range.

Key Features

• Reduces Power for Sensitive Precision Applications
  • Low 90µA Quiescent Current per Amplifier
• Eliminates the Cost of Calibration with Increased Accuracy with Maxim’s Patented Autozero Circuitry
  • Very Low Input Voltage Offset 7.5µV (max)
  • Low 30nV/NC Offset Drift (max)
• Low Noise Ideal for Sensor Interfaces and Transmitters
  • 50nV/√Hz at 1kHz
  • 0.5µV_P-P from 0.1Hz to 10Hz
• 1MHz Gain-Bandwidth Product
  • EMI Suppression Circuitry
• Rail-to-Rail Output
• Wide Supply for High-Voltage Front Ends
  • 2.7V to 36V Supply Range
• µMAX, SO, SOT23, TSSOP Packages

Applications/Uses

• 4-20mA and 0 to 10V Transmitters
• PLC Analog I/O Modules
• Portable Medical Devices
• Sensors Interfaces
• Weight Scales