AD7870/AD7875/AD7876
TABLE OF CONTENTS
Features .............................................................................................. 1
Offset And Full-Scale Adjustment—AD7876 ........................ 13
Offset And Full-Scale Adjustment—AD7875 ........................ 13
Timing and Control ....................................................................... 14
Data Output Formats................................................................. 14
Mode 1 Interface......................................................................... 14
Mode 2 Interface......................................................................... 15
Dynamic Specifications............................................................. 16
Microprocessor Interface............................................................... 19
Parallel Read Interfacing ........................................................... 19
Two-Byte Read Interfacing ....................................................... 19
Serial Interfacing ........................................................................ 20
Standalone Operation................................................................ 21
Applications Information.............................................................. 22
Layout Hints................................................................................ 22
Noise ............................................................................................ 22
Outline Dimensions....................................................................... 23
Ordering Guide .......................................................................... 25
Functional Block Diagram .............................................................. 1
General Description......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD7870 Specifications................................................................. 3
AD7875/AD7876 Specifications................................................. 4
Timing Characteristics ................................................................ 6
Absolute Maximum Ratings............................................................ 7
ESD Caution.................................................................................. 7
Pin Configurations and Function Descriptions ........................... 8
Load Circuits................................................................................... 10
Converter Details............................................................................ 11
Internal Reference ...................................................................... 11
Track-and-Hold Amplifier........................................................ 11
Analog Input ............................................................................... 11
Offset And Full-Scale Adjustment—AD7870 ........................ 12
REVISION HISTORY
2/09—Rev. B to Rev. C
Updated Format..................................................................Universal
Reorganized Layout............................................................Universal
Deleted S Version................................................................Universal
Changes to Internal Clock Parameter, Table 1 and
Added Endnote to Table 1............................................................... 4
Changes to Internal Clock Parameter, Table 2.............................. 5
Changes to Mode 1 Interface Section .......................................... 14
Deleted Data Acquisition Board and Interface Connections
Sections and Figure 26 ................................................................... 15
Deleted Figure 27 and Power Supply Connections, Shorting
Plug Options and Components List Sections ............................. 16
Deleted Figure 28 and Figure 29................................................... 17
Deleted Figure 30 and Figure 31................................................... 18
Updated Outline Dimensions....................................................... 23
Changes to Ordering Guide .......................................................... 25
Rev. C | Page 2 of 28
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