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

Digitally Compensates Sensors to 1% Accuracy

Product Details

Key Features

Simplified Block Diagram

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Key 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

Applications/Uses

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

Description

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.

Simplified Block Diagram

MAX1450: Functional Diagram MAX1450: Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.