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bq2022A

SLUS724E – SEPTEMBER 2006 – REVISED MARCH 2016

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Copyright © 2006–2016, Texas Instruments Incorporated

Table of Contents

1

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

2

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

3

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

4

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

5

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

6

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

6.1

Absolute Maximum Ratings ...................................... 4

6.2

ESD Ratings ............................................................ 4

6.3

Recommended Operating Conditions ....................... 4

6.4

Thermal Information .................................................. 5

6.5

Electrical Characteristics: DC ................................... 5

6.6

Switching Characteristics: AC ................................... 5

6.7

Typical Characteristics .............................................. 6

7

Detailed Description .............................................. 7

7.1

Overview ................................................................... 7

7.2

Functional Block Diagram ......................................... 7

7.3

Feature Description................................................... 7

7.4

Device Functional Modes.......................................... 9

7.5

Programming ............................................................ 9

8

Application and Implementation ........................ 19

8.1

Application Information............................................ 19

8.2

Typical Application ................................................. 19

9

Power Supply Recommendations ...................... 22

10

Layout................................................................... 23

10.1

Layout Guidelines ................................................. 23

10.2

Layout Example .................................................... 23

11

Device and Documentation Support ................. 24

11.1

Documentation Support ........................................ 24

11.2

Trademarks ........................................................... 24

11.3

Electrostatic Discharge Caution ............................ 24

11.4

Glossary ................................................................ 24

12

Mechanical, Packaging, and Orderable

Information ........................................................... 24

4 Revision History

Changes from Revision D (December 2014) to Revision E

Page

•

Added text: "No additional capacitance..." to the Typical Application section ..................................................................... 19

•

Added the SDQ Master Best Practices section ................................................................................................................... 20

•

Added text and Figure 21 to the Power Supply Recommendations section ....................................................................... 22

Changes from Revision C (August 2007) to Revision D

Page

•

Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation

section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

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

•

Deleted Bus-Interface Architecture Allowing Multiple bq2022As Attached to a Single Host from Features .......................... 1

•

Deleted last sentence from second paragraph in Description ............................................................................................... 1

•

Added Junction temperature to Absolute Maximum Ratings ................................................................................................. 4

•

Deleted last two sentences and figure from Serial Communication section .......................................................................... 9

•

Deleted second sentence from READ ROM Command section ............................................................................................ 9

•

Deleted MATCH ROM and SEARCH ROM sections ............................................................................................................ 9

•

Deleted text from first sentence and deleted third sentence from SKIP ROM Command section......................................... 9

•

Changed from: a part is selected by a ROM command to: a part is issued a SKIP ROM command in the last

sentence of the Memory/Status Function Commands section ............................................................................................... 9

•

Changed from: the ROM command is followed to: the SKIP ROM command is followed in the first sentence of the

READ MEMORY/Page CRC section.................................................................................................................................... 10

•

Changed from: Initialization and ROM Command Sequence to: Initialization and SKIP ROM Command Sequence in

Figure 7 ............................................................................................................................................................................... 10

•

Changed from: the ROM command is followed to: the SKIP ROM command is followed in the first sentence of the

READ MEMORY/Field CRC section .................................................................................................................................... 10

•

Changed from: Initialization and ROM Command Sequence to: Initialization and SKIP ROM Command Sequence in

Figure 8................................................................................................................................................................................. 11

•

Changed from: After issuing a ROM command to: After issuing a SKIP ROM command in the second sentence of

the second paragraph of the WRITE MEMORY Command section .................................................................................... 11

•

Changed from: After issuing a ROM command to: After issuing a SKIP ROM command in the first sentence of the