ZSSC3122 Datasheet

© 2018 Integrated Device Technology, Inc.

4

June 8, 2018

List of Figures

Figure 1.1

Pin Assignments for 4.4

 5.0 mm 14-TSSOP – Top View...........................................................................................................6

Figure 6.1

Best Case Settings (Typical Part)................................................................................................................................................11

Figure 6.2

Worst Case Settings (Typical Part) .............................................................................................................................................11

Figure 6.3

Typical Current Consumption during Sleep Mode (No Measurements) ......................................................................................11

Figure 7.1

Output High Drive Strength Graph ..............................................................................................................................................12

Figure 7.2

Output Low Drive Strength Graph ...............................................................................................................................................12

Figure 8.1

First Order Fit (Typical Part) ........................................................................................................................................................13

Figure 8.2

Second Order Fit (Typical Part)...................................................................................................................................................13

Figure 9.1

ZSSC3122 Block Diagram...........................................................................................................................................................14

Figure 10.1

General Operation .......................................................................................................................................................................20

Figure 10.2

Power-On Sequence with Fast Startup Bit Set in EEPROM .......................................................................................................21

Figure 10.3

Measurement Cycle Timing.........................................................................................................................................................22

Figure 10.4

Measurement Sequence in Update Mode ...................................................................................................................................23

Figure 10.5

I2C and SPI Data Fetching in Update Mode................................................................................................................................24

Figure 10.6

Measurement Sequence in Sleep Mode (Only I2C, SPI, or Alarms) ...........................................................................................25

Figure 10.7

I2C and SPI Data Fetching in Sleep Mode..................................................................................................................................26

Figure 10.8

I2C Timing Diagram.....................................................................................................................................................................29

Figure 10.9

SPI Timing Diagram ....................................................................................................................................................................30

Figure 10.10 I2C Measurement Packet Reads.................................................................................................................................................31

Figure 10.11 SPI Output Packet with Positive Edge Sampling.........................................................................................................................32

Figure 10.12 I2C MR ........................................................................................................................................................................................32

Figure 10.13 SPI MR ........................................................................................................................................................................................33

Figure 10.14 Example of Alarm Function .........................................................................................................................................................35

Figure 10.15 Alarm Output Flow Chart .............................................................................................................................................................36

Figure 11.1

I2C Command Format .................................................................................................................................................................37

Figure 11.2

Command Mode Data Fetch .......................................................................................................................................................40

Figure 14.1

Digital Output with Optional Alarms Example..............................................................................................................................49

Figure 14.2

Analog Output with Optional Alarms Example.............................................................................................................................50

Figure 14.3

Bang-Bang Control System Example ..........................................................................................................................................51

Figure 14.4

Differential Input Capacitance Example ......................................................................................................................................52

Figure 14.5

Ext. Reference Input Capacitance Example................................................................................................................................53