ZSC31150

Fast Automotive Sensor Signal Conditioner

Data Sheet

August 31, 2010

© 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.07

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without

notice.

4 of 24

Contents

1

Electrical Characteristics ...............................................................................................................................6

1.1.

Absolute Maximum Ratings....................................................................................................................6

1.2.

Operating Conditions..............................................................................................................................6

1.3.

Electrical Parameters .............................................................................................................................7

1.3.1.

Supply Current and System Operation Conditions ..........................................................................7

1.3.2.

Analog Front-End (AFE) Characteristics .........................................................................................7

1.3.3.

Temperature Measurement (refer chapter 2.4) ...............................................................................7

1.3.4.

AD-Conversion.................................................................................................................................7

1.3.5.

Sensor Connection Check ...............................................................................................................8

1.3.6.

DAC & Analog Output (Pin AOUT) .................................................................................................8

1.3.7.

System Response............................................................................................................................8

1.4.

Interface Characteristics & EEPROM.....................................................................................................9

1.4.1.

I²C

TM Interface (refer 'ZSC31150 Functional Description' for timing details) ...................................9

1.4.2.

ZACwire™ One Wire Interface (OWI)..............................................................................................9

1.4.3.

EEPROM..........................................................................................................................................9

2

Circuit Description .......................................................................................................................................10

2.1.

Signal Flow ...........................................................................................................................................10

2.2.

Application Modes ................................................................................................................................11

2.3.

Analog Front End (AFE) .......................................................................................................................11

2.3.1.

Programmable Gain Amplifier (PGA).............................................................................................11

2.3.2.

Offset Compensation .....................................................................................................................12

2.3.3.

Measurement Cycle .......................................................................................................................12

2.3.4.

Analog-to-Digital Converter............................................................................................................13

2.4.

Temperature Measurement ..................................................................................................................14

2.5.

System Control and Conditioning Calculation ......................................................................................15

2.5.1.

Operation Modes............................................................................................................................15

2.5.2.

Start Up Phase...............................................................................................................................15

2.5.3.

Conditioning Calculation ................................................................................................................15

2.6.

Analog Output AOUT............................................................................................................................16

2.7.

Serial Digital Interface ..........................................................................................................................16

2.8.

Failsafe Features, Watchdog and Error Detection ...............................................................................16

2.9.

High Voltage, Reverse Polarity and Short Circuit Protection ...............................................................17

3

Application Circuit Examples.......................................................................................................................18

4

Pin Configuration, Latch-Up and ESD Protection .......................................................................................20

4.1.

Pin Configuration and Latch-up Conditions..........................................................................................20

4.2.

ESD-Protection.....................................................................................................................................20

5

Package.......................................................................................................................................................21

6

Quality and Reliability..................................................................................................................................21

7

Customization..............................................................................................................................................21

8

Ordering Information ...................................................................................................................................22

9

Additional Documents .................................................................................................................................22

10 Glossary ......................................................................................................................................................23

11 Document Revision History.........................................................................................................................24