ZSSC4151 Datasheet

© 2016 Integrated Device Technology, Inc.

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April 20, 2016

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Brief Description

The ZSSC4151 sensor signal conditioner (SSC) 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 ZSSC4151 is adjustable to nearly all bridge sensor types. Measured values are provided at the analog

voltage output and at the digital I

The digital interfaces can be used for a simple PC-controlled calibration procedure in order to program a set of

calibration coefficients into an on-chip EEPROM. The specific sensor and the ZSSC4151 can be quickly

calibrated together. The ZSSC4151 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 ZSSC4151 is optimized for automotive environments by overvoltage and reverse-polarity protection circuitry,

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

Figure 1.1 provides a block diagram of the ZSSC4151. Refer to section 5 for definitions of abbreviations.

Figure 1.1

ZSSC4151 Block Diagram

ZSSC4151

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

Temp Sensor

Sensor

Bridge

VSSA

Digital Core

Interfaces

Overvoltage

Protection

VDDE

AOUT

OWI

VSSE

SCL

SDA

ZACwire

TM

DAC /

BAMP

NVM

RAM

ROM

I

VDDA

ADC

CMC

Power

Management

* I