AD7265

Rev. A | Page 2 of 28

TABLE OF CONTENTS

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

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

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

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

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

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

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

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Pin Configurations and Function Descriptions ........................... 7

Typical Performance Characteristics ............................................. 9

Terminology .................................................................................... 11

Theory of Operation ...................................................................... 13

Circuit Information.................................................................... 13

Converter Operation.................................................................. 13

Analog Input Structure.............................................................. 13

Analog Inputs.............................................................................. 14

Analog Input Selection .............................................................. 17

Output Coding............................................................................ 17

Transfer Functions...................................................................... 18

Digital Inputs .............................................................................. 18

VDRIVE............................................................................................ 18

Modes of Operation ....................................................................... 19

Normal Mode.............................................................................. 19

Partial Power-Down Mode ....................................................... 19

Full Power-Down Mode ............................................................ 20

Power-Up Times......................................................................... 21

Power vs. Throughput Rate....................................................... 21

Serial Interface ................................................................................ 22

Microprocessor Interfacing........................................................... 23

AD7265 to ADSP218x ............................................................... 23

AD7265 to ADSP-BF53x ........................................................... 24

AD7265 to TMS320C541 .......................................................... 24

AD7265 to DSP563xx ................................................................ 25

Application Hints ........................................................................... 26

Grounding and Layout .............................................................. 26

PCB Design Guidelines for LFCSP .......................................... 26

Evaluating the AD7265 Performance ...................................... 26

Outline Dimensions ....................................................................... 27

Ordering Guide .......................................................................... 27

REVISION HISTORY

11/06—Rev. 0 to Rev. A

Changes to Format .............................................................Universal

Changes to Reference Input/Output Section ................................ 4

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

Changes to Terminology Section.................................................. 11

Changes to Figure 24 and Differential Mode Section................ 15

Changes to Figure 29...................................................................... 16

Changes to AD7265 to ADSP-BF53x Section............................. 24

Updated Outline Dimensions ....................................................... 27

Changes to Ordering Guide .......................................................... 27

4/05—Revision 0: Initial Version