AD7910/AD7920
TABLE OF CONTENTS
Features .............................................................................................. 1
ADC Transfer Function............................................................. 14
Typical Connection Diagram ................................................... 14
Analog Input ............................................................................... 15
Digital Inputs .............................................................................. 15
Modes of Operation ....................................................................... 16
Normal Mode.............................................................................. 16
Power-Down Mode.................................................................... 16
Power-Up Time .......................................................................... 16
Power vs. Throughput Rate........................................................... 18
Serial Interface ................................................................................ 19
Microprocessor Interfacing........................................................... 20
AD7910/AD7920 to TMS320C541 Interface ......................... 20
AD7910/AD7920 to ADSP-218x.............................................. 20
AD7910/AD7920 to DSP563xx Interface ............................... 21
Application Hints ........................................................................... 22
Grounding and Layout .............................................................. 22
Evaluating Performance ............................................................ 22
Outline Dimensions....................................................................... 23
Ordering Guide .......................................................................... 24
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Product Highlights ........................................................................... 1
Specifications..................................................................................... 3
AD7910.......................................................................................... 3
AD7920.......................................................................................... 4
Timing Specifications .................................................................. 6
Timing Examples.............................................................................. 7
Timing Example 1 ........................................................................ 7
Timing Example 2 ........................................................................ 7
Absolute Maximum Ratings............................................................ 8
ESD Caution.................................................................................. 8
Pin Configurations and Function Descriptions ........................... 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 12
Circuit Information........................................................................ 13
Converter Operation...................................................................... 14
REVISION HISTORY
8/03—Rev. 0 to Rev. A
9/05—Rev. B to Rev. C
Changes to Ordering Guide.............................................................6
Changes to Evaluating the AD7910/AD7920 Performance
Section.............................................................................................. 18
Updated Outline Dimensions ...................................................... 19
Updated Formatting ..........................................................Universal
Updated Outline Dimensions....................................................... 23
Changes to Ordering Guide.......................................................... 24
3/04—Rev. A to Rev. B
Added U.S. Patent Number ............................................................ 1
Changes to Note 5 ............................................................................ 2
Changes to Note 6 of AD7920 Specifications............................... 4
Changes to Note 1 of Timing Specifications ................................ 4
Changes to Absolute Maximum Ratings ...................................... 6
Changes to Ordering Guide............................................................ 6
Rev. C | Page 2 of 24
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