Renesas Electronics ZSSC4151 Automotive Sensor Signal Conditioner IC

Renesas Electronics ZSSC4151 Automotive Sensor Signal Conditioner IC is a CMOS integrated circuit for highly accurate amplification and sensor-specific correction of resistive 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. Calibration coefficients are stored in an integrated EEPROM.

The ZSSC4151 is adjustable to nearly all resistive bridge sensor types. Measured values are provided at the analog voltage output, and the optional digital I²C or the ZACwire™ interface is referred to as the one-wire interface (OWI). The digital interfaces can be used for a simple PC-controlled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM.

Renesas Electronics ZSSC4151 and the calibration equipment communicate digitally, so the noise sensitivity is greatly reduced. Digital calibration means no trimming by external devices or lasers is needed.

Features

Safety and diagnostic functions that can enable support for automotive (ASIL B) and industrial (SIL 2) safety-critical applications related to the ISO 26262:2011 and IEC 61508 standards
Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity
Adjustable to nearly all full or half-bridge sensors
Analog gain of 200, supporting sensors with spans down to 1mV/V using the digital zooming option
Output options: ratiometric 12-bit analog voltage output (e.g., 5-95% or 10-90%) with freely adjustable clamping or ZACwire™ digital one wire-interface (OWI)

Temperature compensation: internal or external diode, bridge external series resistance, or RTD
Sensor biasing by an internal voltage
High voltage and reverse polarity protection up to 40V at all module pins: VDDE, VSSE and AOUT
Maximum supply current: 7mA
Short-circuit protection for AOUT
Traceability via user-defined registers