General Description
The MAX1458 highly integrated analog-sensor signal processor is optimized for piezoresistive sensor calibration and compensation without any external components. It includes a programmable current source for sensor excitation, a 3-bit programmable-gain amplifier (PGA), a 128-bit internal EEPROM, and four 12-bit DACs. Achieving a total error factor within 1% of the sensor’s repeatability errors, the MAX1458 compensates offset, offset temperature coefficient, full-span output (FSO), FSO temperature coefficient (FSOTC), and FSO nonlinearity of silicon piezoresistive sensors.

FEATUREs
♦ Medium Accuracy (±1%), Single-Chip Sensor Signal Conditioning
♦ Sensor Errors Trimmed Using Correction Coefficients Stored in Internal EEPROM— Eliminates the Need for Laser Trimming and Potentiometers
♦ Compensates Offset, Offset-TC, FSO, FSOTC, FSO Linearity
♦ Programmable Current Source (0.1mA to 2.0mA) for Sensor Excitation
♦ Fast Signal-Path Settling Time (<1ms)
♦ Accepts Sensor Outputs from 10mV/V to 40mV/V
♦ Fully Analog Signal Path

APPLICATIONs
    Piezoresistive Pressure and Acceleration
    Transducers and Transmitters
    MAP (Manifold Absolute Pressure) Sensors
    Automotive Systems
    Hydraulic Systems
    Industrial Pressure Sensors