16-bit sensor signal conditioner integrates DSP

Developed for resistive bridge sensors, ZMD AG’s 16-bit sensor signal conditioning IC combines high accuracy amplification, 16-bit precision analog-to-digital conversion, and an 18-bit DSP for linearization and calibration functions. The highly integrated CMOS device offers performance accurate enough for altimeter/barometer systems, data merging with GPS receivers, and robotics.

A fully programmable differential gain amplifier optimally works with sensor signal ranges from 12.5-160mV/V. The device can be adapted to different sensor signal range centers, and features an internal auto-compensated temperature sensor.

The on-chip DSP implements the calibration math and sophisticated second-order error correction for temperature offset, drift, and non-linearity. All calibration data is stored in on-chip EEPROM, and the system can be re-calibrated in the field.

Zentrum Mikroelektronik Dresden AG