ZSC31015

Data Sheet

October 28, 2012

© 2012 Zentrum Mikroelektronik Dresden AG

— Rev. 2.00

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.

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Contents

1

Electrical Characteristics ................................................................................................................. 8

1.1.

Absolute Maximum Ratings....................................................................................................... 8

1.2.

Recommended Operating Conditions........................................................................................ 8

1.3.

Electrical Parameters ................................................................................................................ 9

1.4.

Analog Inputs versus Output Resolution.................................................................................. 12

2

Circuit Description ......................................................................................................................... 14

2.1.

Signal Flow and Block Diagram............................................................................................... 14

2.2.

Analog Front End .................................................................................................................... 15

2.2.1. Bandgap/PTAT and PTAT Amplifier .................................................................................. 15

2.2.2. Bridge Supply .................................................................................................................... 15

2.2.3. PREAMP Block ................................................................................................................. 15

2.2.4. Analog-to-Digital Converter (ADC)..................................................................................... 16

2.3.

Digital Signal Processor .......................................................................................................... 16

2.3.1. EEPROM........................................................................................................................... 18

2.3.2. One-Wire Interface -

ZACwire™ ........................................................................................ 18

2.4.

Output Stage ........................................................................................................................... 18

2.4.1. Digital to Analog Converter (Output DAC) with Programmable Clipping Limits .................. 18

2.4.2. Output Buffer ..................................................................................................................... 19

2.4.3. Voltage Reference Block ................................................................................................... 19

2.5.

Clock Generator / Power-On Reset (CLKPOR) ....................................................................... 21

2.5.1. Trimming the Oscillator...................................................................................................... 21

2.6.

Diagnostic Features ................................................................................................................ 21

2.6.1. EEPROM Integrity ............................................................................................................. 22

2.6.2. Sensor Connection Check ................................................................................................. 22

2.6.3. Sensor Short Check .......................................................................................................... 23

2.6.4. Power Loss Detection........................................................................................................ 23

2.6.5. ExtTemp Connection Checks ............................................................................................ 23

3

Functional Description................................................................................................................... 24

3.1.

General Working Mode ........................................................................................................... 24

3.2.

ZACwire™ Communication Interface....................................................................................... 26

3.2.1. Properties and Parameters ................................................................................................ 26

3.2.2. Bit Encoding ...................................................................................................................... 26