AD7293 datasheet(2/78 Pages) AD

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AD7293

Data Sheet

Rev. B | Page 2 of 78

TABLE OF CONTENTS

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

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

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

Simplified Functional Block Diagram ........................................... 1

Product Highlights ........................................................................... 1

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

Functional Block Diagrams............................................................. 3

Specifications..................................................................................... 5

ADC ............................................................................................... 5

DAC................................................................................................ 6

Temperature Sensor ..................................................................... 7

Current Sensor.............................................................................. 8

Closed-Loop Specifications......................................................... 8

General........................................................................................... 9

Timing Characteristics .............................................................. 10

Absolute Maximum Ratings.......................................................... 12

Thermal Resistance .................................................................... 12

ESD Caution................................................................................ 12

Pin Configuration and Function Descriptions........................... 13

Typical Performance Characteristics ........................................... 16

Theory of Operation ...................................................................... 21

Analog-to-Digital Converter (ADC) Overview..................... 21

ADC Transfer Functions ........................................................... 21

Analog Inputs.............................................................................. 22

Current Sensor............................................................................ 22

Temperature Sensor ................................................................... 23

Internal Channel Monitoring ................................................... 24

DAC Operation........................................................................... 24

Reference ..................................................................................... 26

VDRIVE Feature.............................................................................. 26

Open-Loop Mode....................................................................... 26

Closed-Loop Mode .................................................................... 26

Digital Input/Output Registers................................................. 28

Load DAC (LDAC Pin).............................................................. 28

Alerts and Limits ........................................................................ 28

AVDD and AVSS Alarm................................................................ 30

Maximum and Minimum Pages............................................... 30

Hysteresis..................................................................................... 30

Registers Common to All Pages............................................... 32

Result 0/DAC Input (Page 0x00).............................................. 33

Result 1 (Page 0x01)................................................................... 35

Configuration (Page 0x02)........................................................ 36

Sequence (Page 0x03) ................................................................ 45

High Limit 0 (Page 0x04) .......................................................... 47

High Limit 1 (Page 0x05) .......................................................... 48

Low Limit 0 (Page 0x06)............................................................ 49

Low Limit 1 (Page 0x07)............................................................ 50

Hysteresis 0 (Page 0x08)............................................................ 51

Hysteresis 1 (Page 0x09)............................................................ 52

Minimum 0 (Page 0x0A)........................................................... 53

Minimum 1 (Page 0x0B) ........................................................... 54

Maximum 0 (Page 0x0C) .......................................................... 55

Maximum 1 (Page 0x0D) .......................................................... 56

Offset 0 (Page 0x0E)................................................................... 57

Offset 1 (Page 0x0F)................................................................... 59

Alert (Page 0x10)........................................................................ 60

ALERT0 Pin Routing (Page 0x11) ........................................... 62

ALERT1 Pin Routing (Page 0x12) ........................................... 66

Serial Port Interface........................................................................ 70

Interface Protocol....................................................................... 70

Modes of Opertion..................................................................... 71

Applications Information .............................................................. 75

Base Station Power Amplifier Control .................................... 75

Depletion Mode Amplifier Biasing and Protection............... 76

Loop Component Selection ...................................................... 77

Outline Dimensions....................................................................... 78

Ordering Guide .......................................................................... 78

REVISION HISTORY

1/2018—Rev. A to Rev. B

Changes to Figure 7........................................................................ 13

Changes to Table 11........................................................................ 14

Updated Outline Dimensions ...................................................... 78

Changes to Ordering Guide ......................................................... 78

6/2016—Revision A: Initial Version

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