Datasheet

AD7621
Rev. 0 | Page 2 of 32
TABLE OF CONTENTS
Specifications..................................................................................... 3
Timing Specifications....................................................................... 5
Serial Clock Timing Specifications............................................ 6
Absolute Maximum Ratings............................................................ 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
Ter mi no lo g y .................................................................................... 11
Typical Performance Characteristics ........................................... 12
Theory of Operation ...................................................................... 15
Circuit Information.................................................................... 15
Converter Operation.................................................................. 15
Modes of Operation ...................................................................15
Transfer Functions...................................................................... 16
Typical Connection Diagram ................................................... 17
Analog Inputs.............................................................................. 17
Driver Amplifier Choice............................................................ 17
Voltage Reference Input ............................................................ 18
Power Supply............................................................................... 19
Power Dissipation vs. Throughput .......................................... 20
Conversion Control ................................................................... 20
Interfaces.......................................................................................... 21
Digital Interface.......................................................................... 21
Parallel Interface......................................................................... 21
Serial Interface............................................................................ 22
Master Serial Interface............................................................... 22
Slave Serial Interface .................................................................. 24
Microprocessor Interfacing....................................................... 26
Application ...................................................................................... 27
Layout .......................................................................................... 27
Evaluating the AD7621 Performance...................................... 27
Outline Dimensions....................................................................... 28
Ordering Guide .......................................................................... 29
REVISION HISTORY
5/05 — Revision 0: Initial Version