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ADPD103

Data Sheet

Rev. B | Page 2 of 52

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

General Description......................................................................... 1

Revision History ............................................................................... 2

Functional Block Diagram .............................................................. 3

Specifications..................................................................................... 4

Temperature and Power Specifications ..................................... 4

Performance Specifications......................................................... 5

Analog Specifications................................................................... 6

Digital Specifications ................................................................... 7

Timing Specifications .................................................................. 8

Absolute Maximum Ratings............................................................ 9

Thermal Resistance ...................................................................... 9

Recommended Soldering Profile ............................................... 9

ESD Caution.................................................................................. 9

Pin Configurations and Function Descriptions ......................... 10

Typical Performance Characteristics ........................................... 12

Theory of Operation ...................................................................... 13

Introduction ................................................................................ 13

Dual Time Slot Operation......................................................... 13

Time Slot Switch......................................................................... 14

Adjustable Sampling Frequency ............................................... 15

State Machine Operation........................................................... 16

Normal Mode Operation and Data Flow................................ 16

AFE Operation............................................................................ 18

AFE Integration Offset Adjustment......................................... 18

I2C Serial Interface ..................................................................... 20

Typical Connection Diagram ................................................... 21

LED Driver Pins and LED Supply Voltage.............................. 23

LED Driver Operation............................................................... 23

Determining the Average Current ........................................... 23

Determining CVLED ..................................................................... 23

LED Inductance Considerations.............................................. 24

Recommended Start-Up Sequence.......................................... 24

Reading Data............................................................................... 24

Clocks and Timing Calibration................................................ 26

Calculating Current Consumption.......................................... 27

Optimizing SNR per Watt ......................................................... 27

Single AFE channel mode ......................................................... 28

TIA_ADC Mode......................................................................... 28

Digital Integrate Mode............................................................... 30

LED Control Registers............................................................... 38

AFE Configuration Registers.................................................... 41

System Registers ......................................................................... 46

ADC Registers ............................................................................ 50

Data Registers ............................................................................. 51

Outline Dimensions....................................................................... 52

Ordering Guide .......................................................................... 52

REVISION HISTORY

2/16—Revision B: Initial Version

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