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AD9238 Datasheet(PDF) 3 Page - Analog Devices

Part # AD9238
Description  Dual A/D Converter
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9238 Datasheet(HTML) 3 Page - Analog Devices

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AD9238
Rev. C | Page 2 of 48
TABLE OF CONTENTS
Specifications..................................................................................... 4
 
DC Specifications ......................................................................... 4
 
AC Specifications.......................................................................... 5
 
Digital Specifications ................................................................... 6
 
Switching Specifications .............................................................. 6
 
Absolute Maximum Ratings............................................................ 7
 
Explanation of Test Levels ........................................................... 7
 
ESD Caution.................................................................................. 7
 
Pin Configuration
s and Function Descriptions............................ 8 
Terminology .................................................................................... 10
 
Typical Performance Characteristics ........................................... 11
 
Equivalent Circuits ......................................................................... 15
 
Theory of Operation ...................................................................... 16
 
Analog Input ............................................................................... 16
 
Clock Input and Considerations .............................................. 17
 
Power Dissipation and Standby Mode..................................... 18
 
Digital Outputs ........................................................................... 18
 
Timing.......................................................................................... 18
 
Data Format ................................................................................ 19
 
Voltage Reference....................................................................... 19
 
AD9238 LQFP Evaluation Board ................................................. 21
 
Clock Circuitry ........................................................................... 21
 
Analog Inputs ............................................................................. 21
 
Reference Circuitry .................................................................... 21
 
Digital Control logic .................................................................. 21
 
Outputs ........................................................................................ 21
 
LQFP Evaluation Board Bill of Materials (BOM).................. 23
 
LQFP Evaluation Board Schematics ........................................ 24
 
LQFP PCB Layers....................................................................... 28
 
Dual ADC LFCSP PCB.................................................................. 34
 
Power Connector........................................................................ 34
 
Analog Inputs ............................................................................. 34
 
Optional Operational Amplifier .............................................. 34
 
Clock ............................................................................................ 34
 
Voltage Reference ....................................................................... 34
 
Data Outputs............................................................................... 34
 
LFCSP Evaluation Board Bill of Materials (BOM) ................ 35
 
LFCSP PCB Schematics............................................................. 36
 
LFCSP PCB Layers ..................................................................... 39
 
Thermal Considerations............................................................ 44
 
Outline Dimensions ....................................................................... 45
 
Ordering Guide .......................................................................... 46
 
REVISION HISTORY
11/10—Rev. B to Rev. C
Changes to Absolute Maximum Ratings Section.........................7
Added Figure 4; Renumbered Sequentially ..................................8
Changes to Analog Input Section.................................................16
Deleted Note 1 from Dual ADC LFCSP PCB Section...............34
Changes to Outline Dimensions...................................................45
4/05—Rev. A to Rev. B
Changes to Format and Layout........................................ Universal
Added LFCSP ..................................................................... Universal
Changes to Features and Applications...........................................1
Changes to General Description and Product Highlights ..........1
Changes to Figure 1..........................................................................1
Changes to Table 1............................................................................3
Changes to Table 2............................................................................5
Added Digital Specifications...........................................................6
Moved Switching Specifications to ................................................6
Changes to Pin Function Descriptions..........................................8
Changes to Terminology Section .................................................10
Changes to Figure 29......................................................................15
Changes to Clock Input and Considerations Section................17
Changes to Figure 33......................................................................18
Changes to Data Format Section..................................................19
Added AD9238 LQFP Evaluation Board Section ......................21
Added Dual ADC LFCSP PCB Section.......................................34
Added Thermal Considerations Section.....................................44
Updated Outline Dimensions.......................................................45
Changes to Ordering Guide ..........................................................46


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