© 2016 Integrated Device Technology, Inc

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November 14, 2016

ZSC31015 Datasheet

Contents

1

Electrical Characteristics ................................................................................................................... 7

1.1.

Absolute Maximum Ratings ........................................................................................................ 7

1.2.

Recommended Operating Conditions ......................................................................................... 7

1.3.

Electrical Parameters .................................................................................................................. 8

1.3.1. Supply/Regulation Characteristics ........................................................................................ 8

1.3.2. Parameters for Analog Front-End (AFE) ............................................................................... 8

1.3.3. Parameters for EEPROM ...................................................................................................... 8

1.3.4. Parameters for A/D Converter............................................................................................... 8

1.3.5. Parameters for Analog Output (DAC and Buffer) .................................................................. 8

1.3.6. Diagnostics............................................................................................................................ 9

1.3.7. External Temperature Measurement..................................................................................... 9

1.3.8. Para

meters for ZACwire™ Serial Interface ........................................................................... 9

1.3.9. Parameters for System Response ........................................................................................ 9

1.4.

Analog Inputs 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. Bandgap/PTAT and PTAT Amplifier.................................................................................... 14

2.2.2. Bridge Supply ...................................................................................................................... 14

2.2.3. PREAMP Block ................................................................................................................... 14

2.2.4. Analog-to-Digital Converter (ADC) ...................................................................................... 15

2.3.

Digital Signal Processor ............................................................................................................ 15

2.3.1. EEPROM............................................................................................................................. 17

2.3.2. One-Wire Interface

– ZACwire™......................................................................................... 17

2.4.

Output Stage ............................................................................................................................. 17

2.4.1. Digital to Analog Converter (Output DAC) with Programmable Clipping Limits .................. 17

2.4.2. Output Buffer ....................................................................................................................... 18

2.4.3. Voltage Reference Block..................................................................................................... 18

2.5.

Clock Generator / Power-On Reset (CLKPOR) ........................................................................ 20

2.5.1. Trimming the Oscillator ....................................................................................................... 20

2.6.

Diagnostic Features .................................................................................................................. 20

2.6.1. EEPROM Integrity ............................................................................................................... 21

2.6.2. Sensor Connection Check................................................................................................... 21

2.6.3. Sensor Short Check ............................................................................................................ 22

2.6.4. Power Loss Detection ......................................................................................................... 22

2.6.5. ExtTemp Connection Checks.............................................................................................. 22

3

Functional Description..................................................................................................................... 23