ZSSC3018 Datasheet
Table of Contents
1. IC Characteristics .........................................................................................................................................................................................6
1.1 Absolute Maximum Ratings.................................................................................................................................................................6
1.2 Operating Conditions...........................................................................................................................................................................6
1.3 Electrical Parameters ..........................................................................................................................................................................7
1.4 Power Supply Rejection Ratio (RSRR) versus Frequency..................................................................................................................9
2. Circuit Description ......................................................................................................................................................................................10
2.1 Brief Description ................................................................................................................................................................................10
2.2 Signal Flow and Block Diagram.........................................................................................................................................................10
2.3 Analog Front End...............................................................................................................................................................................12
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5
2.3.6
Amplifier..............................................................................................................................................................................12
Analog-to-Digital Converter ................................................................................................................................................13
Selection of Gain and Offset – Sensor System Dimensioning............................................................................................15
Temperature Measurement................................................................................................................................................16
External Sensor Supply: Bridge Sensors............................................................................................................................16
External Sensor: Absolute Voltage Source Sensors ..........................................................................................................16
2.4 Digital Section....................................................................................................................................................................................17
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
Digital Signal Processor (DSP) Core..................................................................................................................................17
MTP Memory......................................................................................................................................................................17
Clock Generator .................................................................................................................................................................17
Power Supervision..............................................................................................................................................................17
Interface..............................................................................................................................................................................17
3. Functional Description................................................................................................................................................................................18
3.1 Power-Up...........................................................................................................................................................................................18
3.2 Measurements...................................................................................................................................................................................18
3.3 Interrupt (EOC Pin)............................................................................................................................................................................18
3.4 Operational Modes ............................................................................................................................................................................20
3.4.1
SPI/I2C Commands ............................................................................................................................................................23
3.5 Communication Interface...................................................................................................................................................................26
3.5.1
3.5.2
3.5.3
Common Functionality........................................................................................................................................................26
SPI......................................................................................................................................................................................27
I2C.......................................................................................................................................................................................29
3.6 Memory..............................................................................................................................................................................................30
3.6.1
3.6.2
Programming Memory........................................................................................................................................................30
Memory Contents ...............................................................................................................................................................31
3.7 Calibration Sequence ........................................................................................................................................................................39
3.7.1
3.7.2
3.7.3
3.7.4
Calibration Step 1 – Assigning Unique Identification..........................................................................................................39
Calibration Step 2 – Data Collection...................................................................................................................................39
Calibration Step 3a) – Coefficient Calculations ..................................................................................................................40
Calibration Step 3b) – Post-Calibration Offset Correction ..................................................................................................40
© 2016 Integrated Device Technology, Inc
3
November 14, 2016
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