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
● Hydraulic Systems
● Industrial Pressure Sensors