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AD7685BCPZRL Datasheet(PDF) 2 Page - Analog Devices

No. de pieza AD7685BCPZRL
Descripción Electrónicos  16-Bit, 250 kSPS PulSAR ADC in MSOP/QFN
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
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AD7685BCPZRL Datasheet(HTML) 2 Page - Analog Devices

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AD7685
Rev. C | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
 
Applications....................................................................................... 1
 
Application Diagram........................................................................ 1
 
General Description ......................................................................... 1
 
Revision History ............................................................................... 2
 
Specifications..................................................................................... 3
 
Timing Specifications....................................................................... 5
 
Absolute Maximum Ratings............................................................ 7
 
ESD Caution.................................................................................. 7
 
Pin Configuration and Function Descriptions............................. 8
 
Terminology ...................................................................................... 9
 
Typical Performance Characteristics ........................................... 10
 
Theory of Operation ...................................................................... 13
 
Circuit Information.................................................................... 13
 
Converter Operation.................................................................. 13
 
Typical Connection Diagram ................................................... 14
 
Analog Inputs.............................................................................. 15
 
Driver Amplifier Choice ........................................................... 16
 
Voltage Reference Input ............................................................ 16
 
Power Supply............................................................................... 16
 
Supplying the ADC from the Reference.................................. 17
 
Digital Interface.......................................................................... 17
 
CS Mode 3-Wire, No BUSY Indicator..................................... 18
 
CS Mode 3-Wire with BUSY Indicator ................................... 19
 
CS Mode 4-Wire, No BUSY Indicator..................................... 20
 
CS Mode 4-Wire with BUSY Indicator ................................... 21
 
Chain Mode, No BUSY Indicator ............................................ 22
 
Chain Mode with BUSY Indicator ........................................... 23
 
Application Hints ........................................................................... 24
 
Layout .......................................................................................... 24
 
Evaluating the Performance of the AD7685............................... 24
 
True 16-Bit Isolated Application Example .............................. 25
 
Outline Dimensions ....................................................................... 26
 
Ordering Guide .......................................................................... 27
 
REVISION HISTORY
8/11—Rev. B to Rev. C
Changes to Figure 6 and Table 7..................................................... 8
Updated Outline Dimensions ....................................................... 26
Changes to Ordering Guide .......................................................... 27
3/07—Rev. A to Rev. B
Changes to Features and Table 1 .................................................... 1
Changes to Table 3............................................................................ 4
Moved Figure 3 and Figure 4 to Page............................................. 6
Inserted Figure 6; Renumbered Sequentially................................ 8
Changes to Figure 13 and Figure 14............................................. 11
Changes to Figure 27...................................................................... 14
Changes to Table 9.......................................................................... 16
Changes to Figure 32...................................................................... 17
Changes to Figure 43...................................................................... 22
Changes to Figure 45...................................................................... 23
Updated Outline Dimensions ....................................................... 26
Changes to Ordering Guide .......................................................... 27
12/04—Rev. 0 to Rev. A
Changes to Specifications.................................................................3
Changes to Figure 17 Captions..................................................... 11
Changes to Power Supply Section ................................................ 17
Changes to Digital Interface Section ........................................... 18
Changes to CS Mode 4-Wire No Busy Indicator Section ......... 21
Changes to CS Mode 4-Wire with Busy Indicator Section....... 22
Changes to Chain Mode, No Busy Indicator Section ................ 23
Changes to Chain Mode with Busy Indicator Section .............. 24
Added True 16-Bit Isolated Application Example Section ....... 26
Added Figure 47 ............................................................................. 26
Changes to Ordering Guide .......................................................... 28
4/04—Revision 0: Initial Revision


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