ZSC31014 Datasheet

3

January 20, 2016

Contents

List of Figures .......................................................................................................................................................... 4

List of Tables ........................................................................................................................................................... 5

1

IC Characteristics ............................................................................................................................................. 6

1.1.

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

1.2.

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

1.3.

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

1.4.

Current Consumption ................................................................................................................................ 9

1.4.1.

Update Mode Current Consumption ................................................................................................... 9

1.4.2.

Sleep Mode Current Consumption.................................................................................................... 10

1.5.

Analog Input versus Output Resolution ................................................................................................... 10

2

Circuit Description .......................................................................................................................................... 13

2.1.

Signal Flow and Block Diagram............................................................................................................... 13

2.2.

Analog Front End..................................................................................................................................... 14

2.2.1.

Preamplifier (PreAmp)....................................................................................................................... 14

2.2.2.

Analog-to-Digital Converter............................................................................................................... 15

2.2.3.

Temperature Measurement .............................................................................................................. 18

2.2.4.

Bridge Supply (Bsink)........................................................................................................................ 18

2.2.5.

Analog Front-End Configuration ....................................................................................................... 19

2.3.

Digital Signal Processor .......................................................................................................................... 19

2.3.1.

Digital Core ....................................................................................................................................... 19

2.3.2.

Normal Operation Mode.................................................................................................................... 20

2.3.3.

EEPROM........................................................................................................................................... 20

2.3.4.

Digital Interface – I

2C™..................................................................................................................... 20

2.3.5.

Digital Interface – SPI ....................................................................................................................... 22

2.3.6.

Clock Generator / Power-On Reset (CLKPOR) ................................................................................ 23

2.4.

Diagnostic Features................................................................................................................................. 23

2.4.1.

EEPROM Integrity............................................................................................................................. 25

2.4.2.

Sensor Connection Check ................................................................................................................ 25

2.4.3.

Sensor Short Check .......................................................................................................................... 25

3

Functional Description.................................................................................................................................... 26

3.1.

General Working Mode............................................................................................................................ 26

3.1.1.

Update Mode..................................................................................................................................... 28

3.1.2.

Sleep Mode ....................................................................................................................................... 30

3.2.

ZSC31014 Read Operations with I

2C™ .................................................................................................. 33

3.2.1.

I

2C™ Read_MR (Measurement Request) ........................................................................................ 34

3.2.2.

I

2C™ Read_DF (Data Fetch) ............................................................................................................ 34

3.3.

SPI Read Operations............................................................................................................................... 34

3.3.1.

SPI Read_MR (Measurement Request) ........................................................................................... 34