ZSC31014 Datasheet

4

January 20, 2016

3.3.2.

SPI Read_DF (Data Fetch) ............................................................................................................... 35

3.4.

I

2C™ Write Operations ............................................................................................................................ 36

3.4.1.

I

2C™ Write_MR (Measurement Request)......................................................................................... 36

3.4.2.

Command Mode I

2C™ Write Operations.......................................................................................... 37

3.5.

Command/Data Pair Encoding in Command Mode ................................................................................ 37

3.6.

EEPROM Bits .......................................................................................................................................... 38

3.7.

Calibration Sequence .............................................................................................................................. 44

3.8.

Calibration Math ...................................................................................................................................... 45

3.8.1.

Bridge Signal Compensation ............................................................................................................ 46

3.8.2.

Temperature Signal Compensation .................................................................................................. 47

3.8.3.

Limits Imposed on Coefficient Ranges ............................................................................................. 47

3.8.4.

Interpretation of Binary Numbers for Correction Coefficients ........................................................... 48

4

Application Circuit Examples.......................................................................................................................... 50

4.1.

I

2C™ Interface – Bridge using Low Power Bsink Option......................................................................... 50

4.2.

Generic Differential A2D Converter ......................................................................................................... 51

4.3.

Half-Bridge Measurement........................................................................................................................ 52

5

ESD/Latch-Up-Protection ............................................................................................................................... 53

6

Pin Configuration and Package...................................................................................................................... 53

7

Test................................................................................................................................................................. 54

8

Reliability ........................................................................................................................................................ 55

9

Customization................................................................................................................................................. 55

10 Ordering Codes .............................................................................................................................................. 55

11 Related Documents........................................................................................................................................ 56

12 Definitions of Acronyms.................................................................................................................................. 56

13 Document Revision History ............................................................................................................................ 57

List of Figures

Figure 1.1

Update Mode Current Consumption with Minimum Update Rate ...................................................... 9

Figure 1.2

Update Mode Current Consumption with Maximum Update Rate ..................................................... 9

Figure 1.3

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

Figure 2.1

ZSC31014 Block Diagram ................................................................................................................ 13

Figure 2.2

Functional Diagram of the ADC ........................................................................................................ 17

Figure 2.3

Format for AFE Configuration Registers B_Config and T_Config.................................................... 19

Figure 2.4

I

2C™ Timing Diagram ....................................................................................................................... 21

Figure 2.5

SPI Bus Data Output Timing............................................................................................................. 23

Figure 3.1

General Working Mode ..................................................................................................................... 27

Figure 3.2

Power-Up Sequence and Timing for Update Mode with EEPROM Locked .................................... 28

Figure 3.3

Measurement Sequence in Update Mode ........................................................................................ 30

Figure 3.4

Power-on Sequence in Sleep Mode for I

2C™ or SPI Read_MR (Typical Timing Values) ............... 32

Figure 3.5

Sequence during Sleep Mode Using an I

2C™ Write_MR to Wake Up (Typical Timing Values**).... 32