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AD7656-1 Datasheet(PDF) 2 Page - Analog Devices

Part # AD7656-1
Description  250 kSPS, 6-Channel, Simultaneous
Download  32 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7656-1 Datasheet(HTML) 2 Page - Analog Devices

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AD7656-1/AD7657-1/AD7658-1
Data Sheet
Rev. D | Page 2 of 32
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Product Highlights ........................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
AD7656-1 ...................................................................................... 3
AD7657-1 ...................................................................................... 5
AD7658-1 ...................................................................................... 7
Timing Specifications .................................................................. 9
Absolute Maximum Ratings.......................................................... 10
Thermal Resistance .................................................................... 10
ESD Caution................................................................................ 10
Pin Configuration and Function Descriptions........................... 11
Typical Performance Characteristics ........................................... 14
Terminology .................................................................................... 18
Theory of Operation ...................................................................... 20
Converter Details ....................................................................... 20
ADC Transfer Function............................................................. 21
Internal/External Reference...................................................... 21
Typical Connection Diagram ................................................... 21
Driving the Analog Inputs ........................................................ 22
Interface Options........................................................................ 22
Software Selection of ADCs...................................................... 24
Changing the Analog Input Range (H/S SEL = 0)................ 25
Changing the Analog Input Range (H/S SEL = 1)................ 25
Serial Read Operation................................................................ 25
Daisy-Chain Mode (DCEN = 1, SER/PAR SEL = 1) ............. 27
Application Hints ........................................................................... 29
Layout .......................................................................................... 29
Power Supply Configuration..................................................... 29
Outline Dimensions....................................................................... 30
Ordering Guide .......................................................................... 30
REVISION HISTORY
3/12—Rev. C to Rev. D
Changes to Figure 28...................................................................... 22
11/10—Rev. B to Rev. C
Added Power Supply Configuration Section.............................. 29
Added Figure 39.............................................................................. 29
6/10—Rev. A to Rev. B
Changes to DC Accuracy Parameter, Table 1 ............................... 3
Changes to DC Accuracy Parameter, Table 2 ............................... 5
Change to DC Accuracy Parameter, Table 3................................. 7
Added %FSR to Terminology Section ......................................... 19
3/09—Rev. 0 to Rev. A
Changes to Features.......................................................................... 1
Changes to Table 1............................................................................ 3
Changes to Table 2............................................................................ 5
Changes to Table 3.............................................................................7
Changes to Table 4.............................................................................9
Changes to Absolute Maximum Ratings Table .......................... 10
Changes to Pin Functions Description Table ............................. 11
Changes to Figure 9........................................................................ 14
Changes to Converter Details Section......................................... 20
Changes to Internal/External Reference Section ....................... 21
Changes to Interface Options Section ......................................... 22
Changes to Parallel Interface Section .......................................... 22
Changes to Serial Interface (SER/PAR SEL = 1) Section .......... 25
Changes to Daisy-Chain Mode (DCEN = 1, SER/PAR SEL = 1) ..27
Changes to Layout Section............................................................ 30
Updated Outline Dimension ........................................................ 31
Changes to Ordering Guide.......................................................... 31
7/08—Revision 0: Initial Version


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