Datasheet AD7656, AD7657, AD7658 (Analog Devices) - 2

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AD7656/AD7657/AD7658 Data Sheet TABLE OF CONTENTS
Features .. 1 Typical Performance Characteristics ... 14 Applications ... 1 Terminology .. 18 Functional Block Diagram .. 1 Theory of Operation .. 20 General Description ... 1 Converter Details ... 20 Product Highlights ... 1 ADC Transfer Function ... 21 Revision History ... 2 Reference Section ... 21 Specifications ... 3 Typical Connection Diagram ... 21 AD7656 .. 3 Driving the Analog Inputs .. 22 AD7657 .. 5 Interface Section ... 22 AD7658 .. 7 Application Hints ... 29 Timing Specifications .. 9 Layout .. 29 Absolute Maximum Ratings .. 10 Power Supply Configuration... 29 Thermal Resistance .. 10 Outline Dimensions ... 30 ESD Caution .. 10 Ordering Guide .. 30 Pin Configuration and Function Descriptions ... 11
REVISION HISTORY 3/12—Rev. C to Rev D 4/06—Rev. 0 to Rev. A
Changes to Figure 26 .. 22 Added AD7657/AD7658 parts ... Universal
8/10—Rev. B to Rev. C
Changes to Table 1 ... 3 Changes to t1 Unit in Table 4 ... 9 Changes to Table 5 .. 10 Changes to VDD to AVCC Rating in Table 5 .. 10 Added Power Supply Configuration Section .. 29
3/06—Revision 0: Initial Version
Added Figure 36 .. 29 VDD to AVCC
1/10—Rev. A to Rev. B
Changes to Unit of DC Accuracy Parameter, Table 1 .. 3 Changes to DC Accuracy Parameter, Table 2 ... 5 Changes to DC Accuracy Parameter, Table 3 ... 7 Changes to Terminology Section.. 18 Updated Outline Dimensions ... 30 Changes to Ordering Guide .. 30 Rev. D | Page 2 of 32 Document Outline Features Applications Functional Block Diagram General Description Product Highlights Table of Contents Revision History Specifications AD7656 AD7657 AD7658 Timing Specifications Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Terminology Theory of Operation Converter Details Track-and-Hold Section Analog Input Section ADC Transfer Function Reference Section Typical Connection Diagram Driving the Analog Inputs Interface Section Parallel Interface (SER/ = 0) Software Selection of ADCs Changing the Analog Input Range (/S SEL = 0) Changing the Analog Input Range (/S SEL = 1) Serial Interface (SER/ = 1) Serial Read Operation Daisy-Chain Mode (DCEN = 1, SER/ = 1) Standby/Partial Power-Down Modes of Operation Application Hints Layout Power Supply Configuration Outline Dimensions Ordering Guide