AD7091R-4BRUZ Ver la hoja de datos (PDF) - Analog Devices

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AD7091R-4BRUZ

2-/4-/8-Channel, 1 MSPS, Ultralow Power, 12-Bit SAR ADC

Analog Devices 

AD7091R-2/AD7091R-4/AD7091R-8

Data Sheet

TABLE OF CONTENTS

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

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

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

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

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

Specifications..................................................................................... 3

Timing Specifications .................................................................. 5

Absolute Maximum Ratings............................................................ 7

Thermal Resistance ...................................................................... 7

ESD Caution.................................................................................. 7

Pin Configurations and Function Descriptions ........................... 8

Typical Performance Characteristics ........................................... 13

Terminology .................................................................................... 18

Theory of Operation ...................................................................... 19

Circuit Information.................................................................... 19

Converter Operation.................................................................. 19

ADC Transfer Function............................................................. 19

Reference ..................................................................................... 19

Power Supply............................................................................... 20

Device Reset ................................................................................ 20

Typical Connection Diagram.................................................... 20

Analog Input ............................................................................... 20

Driver Amplifier Choice............................................................ 21

Registers ........................................................................................... 23

Addressing Registers.................................................................. 23

Conversion Result Register ....................................................... 24

Channel Register ........................................................................ 25

Configuration Register .............................................................. 26

Alert Indication Register ........................................................... 28

Channel x Low Limit Register .................................................. 30

Channel x High Limit Register................................................. 30

Channel x Hysteresis Register .................................................. 30

Serial Port Interface........................................................................ 31

Reading Conversion Result....................................................... 31

Writing Data to the Registers ................................................... 31

Reading Data from the Registers.............................................. 31

Power-On Device Initialization................................................ 33

Modes of Operation ....................................................................... 34

Normal Mode.............................................................................. 34

Power-Down Mode .................................................................... 34

ALERT (AD7091R-4 and AD7091R-8 Only) .......................... 35

BUSY (AD7091R-4 and AD7091R-8 Only) ............................. 35

Channel Sequencer .................................................................... 36

Daisy Chain................................................................................. 37

Outline Dimensions ....................................................................... 39

Ordering Guide .......................................................................... 42

REVISION HISTORY

12/15—Rev. B to Rev. C

Change to the Reference Section .................................................. 19

11/14—Rev. A to Rev. B

Added Endnote 1 .............................................................................. 3

Added Total Power Dissipation (Normal Mode) of 0.080 mW ... 4

Changes to Table 2............................................................................ 5

Added Device Reset Section and Figure 43; Renumbered

Sequentially ..................................................................................... 20

Added Power-On Device Initialization Section and Figure 53..33

7/14—Rev. 0 to Rev. A

Added 16-Lead LFCSP, 20-Lead LFCSP, and

24-Lead LFCSP ...................................................................Universal

Changes to Features Section............................................................ 1

Changes to General Description Section ...................................... 1

Changes to Table 1............................................................................ 3

Changes to Table 4............................................................................ 7

Added Figure 6; Renumbered Sequentially .................................. 8

Changes to Table 5.............................................................................8

Added Figure 8 ..................................................................................9

Changes to Table 6.............................................................................9

Added Figure 10 ............................................................................. 11

Changes to Table 7.......................................................................... 11

Added Power Supply Section and Table 8; Renumbered

Sequentially ..................................................................................... 20

Added Driver Amplifier Choice Section and Table 9................ 21

Changes to Table 16 ....................................................................... 26

Changed Serial Interface Section to Serial Port Interface

Section.............................................................................................. 31

Changes to Figure 52...................................................................... 33

Updated Outline Dimensions ....................................................... 38

Changes to Ordering Guide .......................................................... 41

12/13—Revision 0: Initial Version

Rev. C | Page 2 of 42

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