ZSSC3018 Datasheet

© 2020 Renesas Electronics Corporation

3

September 8, 2020

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

Amplifier..............................................................................................................................................................................12

2.3.2

Analog-to-Digital Converter ................................................................................................................................................13

2.3.3

Selection of Gain and Offset – Sensor System Dimensioning............................................................................................15

2.3.4

Temperature Measurement ................................................................................................................................................16

2.3.5

External Sensor Supply: Bridge Sensors............................................................................................................................16

2.3.6

External Sensor: Absolute Voltage Source Sensors ..........................................................................................................16

2.4 Digital Section....................................................................................................................................................................................17

2.4.1

Digital Signal Processor (DSP) Core..................................................................................................................................17

2.4.2

MTP Memory......................................................................................................................................................................17

2.4.3

Clock Generator .................................................................................................................................................................17

2.4.4

Power Supervision..............................................................................................................................................................17

2.4.5

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

Common Functionality........................................................................................................................................................26

3.5.2

SPI......................................................................................................................................................................................27

3.5.3

I2C.......................................................................................................................................................................................29

3.6 Memory..............................................................................................................................................................................................30

3.6.1

Programming Memory ........................................................................................................................................................30

3.6.2

Memory Contents ...............................................................................................................................................................31

3.7 Calibration Sequence ........................................................................................................................................................................39

3.7.1

Calibration Step 1 – Assigning Unique Identification..........................................................................................................39

3.7.2

Calibration Step 2 – Data Collection...................................................................................................................................39

3.7.3

Calibration Step 3a) – Coefficient Calculations ..................................................................................................................40