Datasheet

AD7766
Rev. C | Page 2 of 24
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Related Devices ................................................................................. 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Timing Specifications .................................................................. 5
Timing Diagrams .......................................................................... 6
Absolute Maximum Ratings ............................................................ 8
ESD Caution .................................................................................. 8
Pin Configuration and Function Descriptions ............................. 9
Typical Performance Characteristics ........................................... 10
Terminology .................................................................................... 14
Theory of Operation ...................................................................... 15
AD7766/AD7766-1/AD7766-2 Transfer Function ................ 15
Converter Operation .................................................................. 15
Analog Input Structure .............................................................. 16
Supply and Reference Voltages ................................................. 16
AD7766/AD7766-1/AD77662-2 Interface .................................. 17
Initial Power-Up ......................................................................... 17
Reading Data ............................................................................... 17
Power-Down, Reset, and Synchronization ............................. 17
Daisy Chaining ............................................................................... 18
Reading Data in Daisy-Chain Mode ....................................... 18
Choosing the SCLK Frequency ................................................ 18
Daisy-Chain Mode Configuration and Timing Diagrams ... 19
Driving the AD7766/AD7766-1/AD7766-2 ............................... 20
Differential Signal Source ......................................................... 20
Single-Ended Signal Source ...................................................... 20
Antialiasing ................................................................................. 21
Power Dissipation....................................................................... 21
V
REF+
Input Signal ....................................................................... 22
Multiplexing Analog Input Channels ...................................... 22
Outline Dimensions ....................................................................... 23
Ordering Guide .......................................................................... 23
REVISION HISTORY
4/10—Rev. B to Rev. C
Changes to Pin 8 Description ......................................................... 9
Changes to Table 8 .......................................................................... 20
3/09—Rev. A to Rev. B
Changes to t
SETTLING
Parameter, Table 3 .......................................... 5
Changes to Table 7 .......................................................................... 17
1/09—Rev. 0 to Rev. A
Changes to Features Section............................................................ 1
Change to AD7766, Intermodulation Distortion (IMD)
Parameter and Integral Nonlinearity Parameter, Table 2 ....... 3
Change to Figure 21 and Figure 24 .............................................. 12
Changes to Supply and Reference Voltages Section ................... 16
Changes to Choosing the SCLK Frequency Section .................. 18
Changes to Driving the AD7766 Section .................................... 20
Changes to Single-Ended Signal Source Section ........................ 20
Changes to Figure 40 and Figure 41 ............................................. 20
Added Table 8; Renumbered Sequentially .................................. 20
Change to Figure 42 ....................................................................... 21
Changes to Antialiasing Section ................................................... 21
Changes to Table 9 .......................................................................... 21
Changes to V
REF+
Input Signal Section ......................................... 22
Changes to Figure 46 ...................................................................... 22
8/07—Revision 0: Initial Version