ZSSC4151C Datasheet

© 2022 Renesas Electronics Corporation

14

March 25, 2020

7. Circuit Description

The ZSSC4151C Sensor Signal Conditioner (SSC) is a CMOS integrated circuit for highly accurate amplification and sensor-specific correction

of resistive sensor element signals. Digital compensation of sensor offset, sensitivity, temperature drift, and non-linearity is accomplished via

an internal 16-bit RISC microcontroller running a ROM-based correction algorithm with calibration coefficients stored in a nonvolatile memory

(NVM).

The ZSSC4151C is adjustable to nearly all resistive sensor element types. Measured values are provided at the analog voltage output (AOUT).

The digital interfaces OWI or I2C can be used for a simple PC-controlled calibration procedure to program a set of calibration coefficients into

the on-chip NVM. The specific sensor element and the ZSSC4151C can be quickly calibrated together. The ZSSC4151C and the calibration

equipment communicate digitally, so the noise sensitivity is greatly reduced. Digital calibration helps keep assembly cost low as no trimming by

external devices or lasers is needed.

The ZSSC4151C is optimized for automotive environments by over-voltage and reverse-polarity protection circuitry, excellent electromagnetic

compatibility, full automotive temperature range, and multiple diagnostic features.

Figure 3 provides a block diagram of the ZSSC4151C. Refer to section 14 for definitions of abbreviations.

Figure 3. ZSSC4151C Block Diagram

ZSSC4151C

SCCM

Mode

Input

Select

MUX

Temp

Sensor

Gain

Select

ADC

Mode

Analog

Front-End

(AFE)

Alternate External

Temperature Sensor 2

PGA

TS1

TOP

BR1P

BR1N

BOT

TS2

External PN

Temperature

Sensor

Sensor

Bridge

VSSA

Digital Core

Interfaces

VDDE

AOUT

OWI

VSSE

SCL

SDA

NVM

RAM

ROM

I2C

VDDA

ADC

CMC

Note: Either TS1 or TS2 can be used for the external

temperature sensor input, but not both at the same time.

ZACwireTM

DAC /

BAMP

Over-Voltage

Protection

Power

Management

Analog

Digital

Interface

Functionality Support