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AD7656-1 Datasheet(PDF) 2 Page - Analog Devices |
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AD7656-1 Datasheet(HTML) 2 Page - Analog Devices |
2 / 32 page 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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