AD9238BCP-20(RevC) Ver la hoja de datos (PDF) - Analog Devices
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AD9238BCP-20 Datasheet PDF : 48 Pages
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AD9238
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 Configurations 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
Rev. C | Page 2 of 48
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