Datasheet

Data Sheet AD7949
Rev. D | Page 3 of 32
REVISION HISTORY
3/12—Rev. C to Rev. D
Changes to Figure 26 ...................................................................... 16
Changes to Internal Reference/Temperature Sensor Section .... 19
Changes to External Reference and Internal Buffer Section ..... 20
Changes to Bits[5:3] Function, Table 9 ......................................... 24
Updated Outline Dimensions ........................................................ 32
8/11—Rev. B to Rev. C
Changes to Internal Reference Section ........................................ 18
Changes to External Reference and Internal Buffer Section and
External Reference Section ............................................................ 19
Changes to Bits[5:3] Function, Table 9 ......................................... 22
5/09—Rev. A to Rev. B
Changes to Features Section, Applications Section, and
Figure 1 ............................................................................................... 1
Changes to Specifications Section ................................................... 3
Changes to Timing Specifications Section ..................................... 5
Changes to Table 5 ............................................................................ 7
Changes to Figure 4 and Table 6 ..................................................... 8
Changes to Figure 20 ...................................................................... 11
Changes to Converter Operation Section .................................... 13
Changes to Table 7 .......................................................................... 14
Changes to Figure 25 and Figure 26 ............................................. 15
Changes to Bipolar Single Supply Section, Input Structure
Section, and Selectable Low-Pass Filter Section ......................... 16
Changes to Input Configurations Section, Sequencer Section,
and Source Resistance Section....................................................... 17
Changes to Internal Reference/Temperature Sensor Section .... 18
Added Figure 30; Renumbered Sequentially ............................... 18
Changes to External Reference and Internal Buffer Section,
External Reference Section, and Reference Decoupling
Section .............................................................................................. 19
Added Figure 31 and Figure 32 ..................................................... 19
Changes to Power Supply Section ................................................. 20
Changed Reading/Writing During Conversion, Fast Hosts
Section to Reading/Writing After Conversion,
Any Speed Hosts ............................................................................. 21
Changes to Configuration Register, CFG Section and
Table 9 ............................................................................................... 22
Added General Timing Without a Busy Indicator Section and
Figure 36 ........................................................................................... 23
Added General Timing with a Busy Indicator Section and
Figure 37 ........................................................................................... 24
Added Channel Sequencer Section, Examples Section, and
Figure 38 ........................................................................................... 25
Changes to Read/Write Spanning Conversion Without a Busy
Indicator Section and Figure 40 .................................................... 26
Changes to Read/Write Spanning Conversion with a Busy
Indicator Section and Figure 42 .................................................... 27
Changes to Evaluating AD7949 Performance Section ............... 28
Added Exposed Pad Notation to Outline Dimensions .............. 29
Changes to Ordering Guide ........................................................... 29
5/08—Rev. 0 to Rev. A
Changes to Ordering Guide ........................................................... 26
5/08—Revision 0: Initial Version