Absolute Maximum Ratings ..........................................................................................................................................................................8
Current Consumption Graphs .....................................................................................................................................................................12
6.1 Update Mode Current Consumption ..................................................................................................................................................12
6.2 Sleep Mode Current Consumption ....................................................................................................................................................13
7.
8.
9.
Output Pad Drive Strength .........................................................................................................................................................................14
Temperature Sensor Nonlinearity ...............................................................................................................................................................15
9.1 Signal Flow and Block Diagram .........................................................................................................................................................16
9.2 Analog Front End...............................................................................................................................................................................16
Temperature Measurement ................................................................................................................................................22
9.3 Digital Core ........................................................................................................................................................................................23
10. Normal Operation Mode .............................................................................................................................................................................24
10.4 Status and Diagnostics ......................................................................................................................................................................32
10.6 I2C and SPI .......................................................................................................................................................................................34
10.6.1
10.6.2
10.6.3
10.6.4
10.6.5
10.6.6
I2C Features and Timing ....................................................................................................................................................34
SPI Features and Timing ....................................................................................................................................................35
I2C and SPI Commands .....................................................................................................................................................35
Data Fetch (DF) ..................................................................................................................................................................36
11.3 Command Response and Data Fetch ...............................................................................................................................................43
13. Calibration and Signal Conditioning Math...................................................................................................................................................52
13.1 Capacitance Signal Conditioning .......................................................................................................................................................52
13.2 Temperature Signal Compensation ...................................................................................................................................................54
13.3 Limits on Coefficient Ranges .............................................................................................................................................................54
14.1 Digital Output with Optional Alarms ...................................................................................................................................................55
14.2 Analog Output with Optional Alarms ..................................................................................................................................................56
14.3 Bang-Bang Control System ...............................................................................................................................................................57
20. Example Marking Diagram for TSSOP14 Parts..........................................................................................................................................61
21. Storage and Soldering Conditions ..............................................................................................................................................................61
5.0mm 14-TSSOP – Top View ............................................................................................................7
Figure 2. Best Case Settings (Typical Part) ......................................................................................................................................................12
Figure 3. Worst Case Settings (Typical Part) ...................................................................................................................................................13
Figure 4. Typical Current Consumption during Sleep Mode (No Measurements) ............................................................................................13
Figure 5. Output High Drive Strength Graph ....................................................................................................................................................14
Figure 7. First Order Fit (Typical Part) ..............................................................................................................................................................15
Figure 8. Second Order Fit (Typical Part) .........................................................................................................................................................15
Figure 10. General Operation .............................................................................................................................................................................24
Figure 11. Power-On Sequence with Fast Startup Bit Set in EEPROM .............................................................................................................25
Figure 13. Measurement Sequence in Update Mode .........................................................................................................................................27
Figure 14. I2C and SPI Data Fetching in Update Mode......................................................................................................................................29
Figure 15. Measurement Sequence in Sleep Mode (Only I2C, SPI, or Alarms) .................................................................................................30
Figure 16. I2C and SPI Data Fetching in Sleep Mode ........................................................................................................................................31
Figure 23. Example of Alarm Function ...............................................................................................................................................................40
Figure 25. I2C Command Format .......................................................................................................................................................................42
Figure 26. Command Mode Data Fetch .............................................................................................................................................................45
Figure 27. Digital Output with Optional Alarms Example ....................................................................................................................................55
Figure 28. Analog Output with Optional Alarms Example ...................................................................................................................................56
Figure 29. Bang-Bang Control System Example ................................................................................................................................................57
Figure 30. Differential Input Capacitance Example ............................................................................................................................................58
Figure 31. External Reference Input Capacitance Example ...............................................................................................................................59
Absolute Maximum Ratings .................................................................................................................................................................8
Mult 1: Sensor Capacitors Ranging from 2pF to 10pF (Full Scale Values) .......................................................................................20
Mult 2: Sensor Capacitors Ranging from 8pF to 32pF (Full Scale Values) .......................................................................................20
Mult 4: Sensor Capacitors Ranging from 32pF to 130pF (Full Scale Values) ...................................................................................21
Mult 8: Sensor Capacitors Ranging from 130pF to 260pF (Full Scale Values) .................................................................................21
Table 10. CDC Resolution and Conversion Times ............................................................................................................................................26
Table 11. Update Rate Settings (Power_Down_Period Bit Field in ZMDI_Config) ...........................................................................................27
Table 12. Time Periods between Capacitance and Temperature Measurements for Mult1, Different Resolutions, and Update Rates ...........28
Table 13. Time Periods between Capacitance and Temperature Measurements for Mult2, Different Resolutions, and Update Rates ...........28
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FPGA/CPLD
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