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General 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).

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

Applications

Piezoresistive Pressure and Acceleration

Transducers and Transmitters

Manifold Absolute Pressure (MAP) Sensors

Automotive Systems

Hydraulic Systems

Industrial Pressure Sensors