Bridge sensor signal conditioner IC for automotive solutions

Analog Devices ADA4558 Bridge Sensor Signal Conditioner IC provides digital nonlinearity correction and temperature compensation via internal or external sensed temperatures. This is achieved using on-chip correction and calibration hardware that can be optimised for a particular bridge sensor. The device employs a fourth-order digital correction algorithm and gives a system accuracy of 0.1% full-scale range for bridge sensors with second-order nonlinearity sensitivity. The device comprises a local interconnect network physical interface for single-wire, high-voltage communications in automotive environments. LIN 2.1 and past versions are supported. The LIN interface provides access to measurements, end of line calibration, and a broad range of diagnostic functions.

The analog subsystem comprises of an ADC and a PGA with a wide gain range from 2.94V/V to 971.10V/V. To reduce power supply noise, the bridge sensor is biased with an internal 4V voltage regulator. The device is fully specified from −40C to +150C. The device runs from battery supply voltages of 6V to 18V. The IC is offered in a 4mm x 4mm, 20-lead lead frame chip scale package (LFCSP).