Brief Description

The ZSC31150 is a CMOS integrated circuit for highly-accurate amplification and sensor-specific correction of bridge sensor signals. Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity is accomplished via an internal 16-bit RISC microcontroller running a correction algorithm, with calibration coefficients stored in an EEPROM.

The ZSC31150 is adjustable to nearly all bridge sensor types. Measured values are provided at the analog voltage output or at the digital ZACwireTM and I²CTM interface. The digital interface can be used for a simple PC-controlled calibration procedure, in order to program a set of calibration coefficients into an on-chip EEPROM. Thus, a specific sensor and a ZSC31150 are mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or a laser.

Features

Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity

Adjustable to nearly all bridge sensor types, analog gain of 420, overall gain up to 2000

Output options: ratiometric analog voltage output (5 - 95% in maximum, 12.4 bit resolution) or ZACwireTM (digital one-wire-interface)

Temperature compensation: internal or external diode, bridge resistance, thermistor

Sensor biasing by voltage or constant current

Sample rate up to 7.8 kHz

High voltage protection up to 33 V

Supply current: max. 5.5mA

Reverse polarity and short circuit protection

Wide operation temperature up to -40…+150°C Traceability by user-defined EEPROM entries

Several safety and diagnostic functions