ZSSC3123 Datasheet

Nov 19, 2021

Page 3

© 2021 Renesas Electronics

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................................................................................................................................................20

9.3 Digital Core........................................................................................................................................................................................21

10. Normal Operation Mode .............................................................................................................................................................................22

10.1 Power-On Sequence .........................................................................................................................................................................23

10.2 Measurement Cycle...........................................................................................................................................................................23

10.3 Measurement Modes.........................................................................................................................................................................24

10.3.1 Update Mode......................................................................................................................................................................24

10.3.2 Sleep Mode ........................................................................................................................................................................27

10.4 Status and Diagnostics......................................................................................................................................................................29

10.4.1 EEPROM Error Detection and Correction ..........................................................................................................................30

10.4.2 Alarm Diagnostics...............................................................................................................................................................30

10.5 Output Modes....................................................................................................................................................................................31

10.6 I2C and SPI .......................................................................................................................................................................................31

10.6.1 I2C Features and Timing....................................................................................................................................................31

10.6.2 SPI Features and Timing....................................................................................................................................................32

10.6.3 I2C and SPI Commands.....................................................................................................................................................33

10.6.4 Data Fetch (DF)..................................................................................................................................................................33

10.6.5 Measurement Request (MR) ..............................................................................................................................................35

10.6.6 Ready Pin...........................................................................................................................................................................36

10.7 Pulse Density Modulation (PDM).......................................................................................................................................................37

10.8 Alarm Output .....................................................................................................................................................................................37

10.8.1 Alarm Registers..................................................................................................................................................................38

10.8.2 Alarm Operation .................................................................................................................................................................38

10.8.3 Alarm Output Configuration................................................................................................................................................39

10.8.4 Alarm Polarity .....................................................................................................................................................................39