ZSSC3123 Datasheet

© 2018 Integrated Device Technology, Inc.

3

August 16, 2018

Contents

1.

Pin Assignments...........................................................................................................................................................................................7

2.

Pin Descriptions............................................................................................................................................................................................7

3.

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

4.

Recommended Operating Conditions ..........................................................................................................................................................9

5.

Electrical Characteristics ............................................................................................................................................................................10

6.

Current Consumption Graphs.....................................................................................................................................................................12

6.1 Update Mode Current Consumption..................................................................................................................................................12

6.2 Sleep Mode Current Consumption ....................................................................................................................................................13

7.

Output Pad Drive Strength .........................................................................................................................................................................14

8.

Temperature Sensor Nonlinearity...............................................................................................................................................................15

9.

Circuit Description ......................................................................................................................................................................................16

9.1 Signal Flow and Block Diagram.........................................................................................................................................................16

9.2 Analog Front End...............................................................................................................................................................................16

9.2.1

Capacitance-to-Digital Converter .......................................................................................................................................16

9.2.2

Temperature Measurement ................................................................................................................................................22

9.3 Digital Core........................................................................................................................................................................................23

10. Normal Operation Mode .............................................................................................................................................................................24

10.1 Power-On Sequence .........................................................................................................................................................................25

10.2 Measurement Cycle...........................................................................................................................................................................26

10.3 Measurement Modes.........................................................................................................................................................................27

10.3.1 Update Mode......................................................................................................................................................................27

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

10.4 Status and Diagnostics......................................................................................................................................................................32

10.4.1 EEPROM Error Detection and Correction ..........................................................................................................................33

10.4.2 Alarm Diagnostics...............................................................................................................................................................33

10.5 Output Modes....................................................................................................................................................................................33

10.6 I2C and SPI .......................................................................................................................................................................................34

10.6.1 I2C Features and Timing ....................................................................................................................................................34

10.6.2 SPI Features and Timing....................................................................................................................................................35

10.6.3 I2C and SPI Commands.....................................................................................................................................................35

10.6.4 Data Fetch (DF)..................................................................................................................................................................36

10.6.5 Measurement Request (MR) ..............................................................................................................................................37

10.6.6 Ready Pin...........................................................................................................................................................................38

10.7 Pulse Density Modulation (PDM).......................................................................................................................................................38

10.8 Alarm Output .....................................................................................................................................................................................39

10.8.1 Alarm Registers..................................................................................................................................................................40

10.8.2 Alarm Operation .................................................................................................................................................................40

10.8.3 Alarm Output Configuration ................................................................................................................................................41