Datasheet

AD7864
Rev. D | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
Applicat ions ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Characteristics ................................................................ 5
Absolute Maximum Ratings ............................................................ 6
ESD Caution .................................................................................. 6
Pin Configuration and Function Descriptions ............................. 7
Terminology ...................................................................................... 9
Theory of Operation ...................................................................... 11
Converter Details ........................................................................ 11
Circuit Description ......................................................................... 13
Analog Input ............................................................................... 13
Selecting a Conversion Sequence ................................................. 15
Timing and Control ................................................................... 15
Using an External Clock ............................................................ 17
Standby Mode Operation .......................................................... 18
Accessing the Output Data Registers ....................................... 18
Offset and Full-Scale Adjustment ................................................ 20
Positive Full-Scale Adjust .......................................................... 20
Negative Full-Scale Adjust ......................................................... 20
Dynamic Specifications ................................................................. 21
Signal-to-Noise Ratio (SNR)..................................................... 21
Effective Number of Bits ........................................................... 21
Intermodulation Distortion ...................................................... 21
AC Linearity Plots ...................................................................... 22
Measuring Aperture Jitter .......................................................... 22
Microprocessor Interfacing ........................................................... 24
AD7864 to ADSP-2100/ADSP-2101/ADSP-2102 Interface . 24
AD7864 to TMS320C5x Interface ............................................ 24
AD7864 to MC68HC000 Interface .......................................... 24
Vector Motor Control ................................................................ 25
Multiple AD7864s in A System ................................................. 26
Outline Dimensions ....................................................................... 27
Ordering Guide .......................................................................... 27
REVISION HISTORY
2/09—Rev. C to Rev. D
Change to t
2
Parameter, Table 2 ...................................................... 5
2/09—Rev. B to Rev. C
Updated Format .................................................................. Universal
Changes to t
5
Timing Parameter, Table 2....................................... 5
Changes to Figure 15 ...................................................................... 20
Changes to AD7864 to MC68HC000 Interface Section ............ 24
Changes to Figure 25 ...................................................................... 24
Updated Outline Dimensions ....................................................... 29
Changes to Ordering Guide .......................................................... 29
3/04—Rev. A to Rev. B.
Changes to Specifications and to Footnote 4 ................................. 2
Changes to Timing Characteristics Footnote 1 ............................. 4
Addition to Absolute Maximum Ratings ....................................... 5
Changes to Ordering Guide ............................................................. 5
Changes to Figure 7 ......................................................................... 11
Changes to Figure 11 ...................................................................... 13
Updated Outline Dimensions ....................................................... 19
Added Revision History ................................................................ 20
Updated Publication Code ............................................................ 20