MAX1450
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MAX1450

Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors

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Digitally Compensates Sensors to 1% Accuracy

Part Details
Features
  • 1% Sensor Signal Conditioning
  • Corrects Sensor Errors Using Coefficients Stored in External Trimmable Resistors, Potentiometers, or DACs
  • Compensates Offset, Offset TC, FSO, FSO TC, and FSO Linearity
  • Rail-to-Rail Analog Output
  • Programmable Current Source for Sensor Excitation
  • Fast Signal-Path Settling Time (< 1ms)
  • Accepts Sensor Outputs from 10mV/V to 30mV/V
  • Fully Analog Signal Path
  • Contains PGA, current source
Additional Details
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The MAX1450 sensor signal conditioner is optimized for piezoresistive sensor calibration and temperature compensation. It includes an adjustable current source for sensor excitation and a 3-bit programmable-gain amplifier (PGA). Achieving a total typical error factor within 1% of the sensor's inherent repeatability errors, the MAX1450 compensates offset, full-span output (FSO), offset tempco, FSO tempco, and FSO nonlinearity of silicon piezoresistive sensors via external trimmable resistors, potentiometers, or digital-to-analog converters (DACs).

The MAX1450 is capable of compensating sensors that display close error distributions with a single temperature point, making it ideal for low-cost, medium-accuracy applications. Although optimized for use with popular piezoresistive sensors, it may also be used with other resistive sensor types such as strain gauges.

Applications

  • Hydraulic Systems
  • Manifold Absolute Pressure (MAP) Sensors
  • Piezoresistive Pressure and Acceleration Transducers and Transmitters

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Documentation
Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX1450EVKIT

Evaluation Kit for the MAX1450

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MAX1450EVKIT

Evaluation Kit for the MAX1450

Evaluation Kit for the MAX1450

Features and Benefits

  • Proven PC Board Layout
  • Convenient Test Points Provided On-Board
  • Includes Calibrated (at room temperature) Lucas NovaSensor Pressure Sensor
  • Fully Assembled and Tested
  • Supports Many Popular Sensor Packages

Product Detail

The MAX1450 evaluation kit (EV kit) demonstrates silicon piezoresistive sensor calibration and temperature compensation using the MAX1450. The kit includes an assembled and tested PC board with a Lucas NovaSensor® pressure sensor calibrated at room temperature. It also supports several popular pressure-sensor packages. The board uses multiturn potentiometers and configuration switches to calibrate and temperature-compensate a sensor to 1% accuracy.

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