Datasheet

AD7654
Rev. B | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Product Highlights ........................................................................... 1
Specifications..................................................................................... 3
Timing Specifications .................................................................. 5
Absolute Maximum Ratings............................................................ 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
Terminology .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Application Information................................................................ 14
Circuit Information....................................................................14
Modes of Operation ................................................................... 14
Transfer Functions...................................................................... 14
Typical Connection Diagram ................................................... 16
Analog Inputs.............................................................................. 16
Input Channel Multiplexer........................................................ 16
Driver Amplifier Choice ........................................................... 16
Voltage Reference Input ............................................................ 17
Power Supply............................................................................... 17
Power Dissipation....................................................................... 17
Conversion Control ................................................................... 18
Digital Interface.......................................................................... 18
Parallel Interface......................................................................... 18
Serial Interface............................................................................ 20
Master Serial Interface............................................................... 20
Slave Serial Interface.................................................................. 22
Microprocessor Interfacing....................................................... 24
SPI Interface (ADSP-219x) ....................................................... 24
Application Hints ........................................................................... 25
Layout .......................................................................................... 25
Evaluating the AD7654 Performance...................................... 25
Outline Dimensions....................................................................... 26
Ordering Guide .......................................................................... 27
REVISION HISTORY
11/05—Rev. A to Rev. B
Changes to General Description .................................................... 1
Changes to Timing Specifications.................................................. 5
Changes to Figure 16...................................................................... 13
Changes to Figure 18...................................................................... 15
Added Table 8.................................................................................. 17
Changes to Figure 24...................................................................... 19
Changes to Figure 29...................................................................... 21
Updated Outline Dimensions....................................................... 26
Changes to Ordering Guide .......................................................... 26
11/04—Rev. 0 to Rev. A
Changes to Figure 7........................................................................ 12
Changes to Figure 18...................................................................... 15
Changes to Figure 19...................................................................... 16
Changes to Voltage Reference Input Section.............................. 17
Changes to Conversion Control Section..................................... 18
Changes to Digital Interface Section ........................................... 18
Updated Outline Dimensions...................................................... 25
11/02—Revision 0: Initial Version