MAX1450CAP

低成本， 1 ％精确度信号调理器，用于压阻式传感器 Low-Cost, 1%-Accurate Signal Conditioner for Piezoresistive Sensors

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, off

set 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