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ADS8528, ADS8548, ADS8568

SBAS543C – AUGUST 2011 – REVISED FEBRUARY 2016

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Product Folder Links: ADS8528 ADS8548 ADS8568

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Copyright © 2011–2016, Texas Instruments Incorporated

Table of Contents

1

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

2

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

3

Description ............................................................. 1

4

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

5

Device Comparison Table..................................... 4

6

Pin Configuration and Functions ......................... 4

7

Specifications......................................................... 9

7.1

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

7.2

ESD Ratings.............................................................. 9

7.3

Recommended Operating Conditions ....................... 9

7.4

Thermal Information .................................................. 9

7.5

Electrical Characteristics: General .......................... 10

7.6

Electrical Characteristics: ADS8528 ....................... 13

7.7

Electrical Characteristics: ADS8548 ....................... 14

7.8

Electrical Characteristics: ADS8568 ....................... 15

7.9

Serial Interface Timing Requirements..................... 16

7.10

Parallel Interface Timing Requirements (Read

Access) .................................................................... 17

7.11

Parallel Interface Timing Requirements (Write

Access) .................................................................... 17

7.12

Typical Characteristics .......................................... 20

8

Parameter Measurement information ................ 26

8.1

Equivalent Circuits .................................................. 26

9

Detailed Description ............................................ 26

9.1

Overview ................................................................. 26

9.2

Functional Block Diagram ....................................... 27

9.3

Feature Description................................................. 28

9.4

Device Functional Modes........................................ 34

9.5

Register Maps ........................................................ 39

10

Application and Implementation........................ 41

10.1

Application Information.......................................... 41

10.2

Typical Application ................................................ 41

11

Power Supply Recommendations ..................... 46

12

Layout................................................................... 46

12.1

Layout Guidelines ................................................. 46

12.2

Layout Example .................................................... 47

13

Device and Documentation Support ................. 48

13.1

Documentation Support ....................................... 48

13.2

Related Links ........................................................ 48

13.3

Community Resources.......................................... 48

13.4

Trademarks ........................................................... 48

13.5

Electrostatic Discharge Caution ............................ 48

13.6

Glossary ................................................................ 48

14

Mechanical, Packaging, and Orderable

Information ........................................................... 48

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision B (November 2015) to Revision C

Page

•

Changed Figure 45: changed capacitor values from 820 nF to 820 pF .............................................................................. 42

Changes from Revision A (October 2011) to Revision B

Page

•

Added ESD Ratings table, Recommended Operating Conditions table, Feature Description section, Device

Functional Modes section, Register Maps section, Application and Implementation section, Power Supply

Recommendations section, Layout section, Device and Documentation Support section, and Mechanical,

Packaging, and Orderable Information section ...................................................................................................................... 1

•

Changed title of Device Comparison Table, deleted footnote 1 ............................................................................................ 4

•

Added Storage temperature parameter to Absolute Maximum Ratings table........................................................................ 9

•

Timing Requirements table .................................................................................................................................................. 16

•

•

Added footnote 3 to Serial Interface Timing Requirements table......................................................................................... 16

•

Interface Timing Requirements (Read Access) table .......................................................................................................... 17

•

•

Added footnote 3 to Parallel Interface Timing Requirements (Read Access) table ............................................................ 17

•

Changed Data Readout and BUSY/INT Signal section........................................................................................................ 30

•

Added Sequential Operation section .................................................................................................................................... 31

•

Changed description of initiating a new conversion in Reset and Power-Down Modes section.......................................... 38