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AD7949

14-Bit, 8-Channel, 250 kSPS PulSAR ADC

Analog Devices 

Data Sheet

REVISION HISTORY

6/2017—Rev. E to Rev. F

Changes to Table 9 ..........................................................................24

Updated Outline Dimensions........................................................32

Changes to Ordering Guide...........................................................32

5/2015—Rev. D to Rev. E

Changed ADA4841-x to ADA4841-1, ADR43x to ADR430/

ADR431/ADR433/ADR434/ADR435, and AD44x to ADR440/

ADR441/ADR443/ADR444/ADR445 ........................ Throughout

Updated Outline Dimensions........................................................32

Changes to Ordering Guide...........................................................32

3/2012—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

8/2011—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

5/2009—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

AD7949

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

5/2008—Rev. 0 to Rev. A

Changes to Ordering Guide...........................................................26

5/2008—Revision 0: Initial Version

Rev. F | Page 3 of 32

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