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MAX1458 - 1%-Accurate / Digitally Trimmed Sensor Signal Conditioner

Description

The MAX1458 highly integrated analog-sensor signal processor is optimized for piezoresistive sensor calibration and compensation without any external components.

Features

  • on the MAX1458 result in the integration of three traditional sensor-manufacturing operations into one automated process:.
  • Pretest: Data acquisition of sensor performance under the control of a host test computer.
  • Calibration and compensation: Computation and storage (in an internal EEPROM) of calibration and compensation coefficients computed by the test computer and downloaded to the MAX1458.
  • Final test operation: Verification of transducer calibration and compensa.

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Full PDF Text Transcription

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19-1373; Rev 0; 5/98 1%-Accurate, Digitally Trimmed Sensor Signal Conditioner 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.
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