AD9238 Analog Devices, AD9238 Datasheet - Page 2

• Manufacturer Part Number: AD9238
• Description: Dual 12-Bit, 20/40/65 MSPS, 3 V ADC
• Manufacturer: Analog Devices

Specifications of AD9238

• Resolution (bits): 12bit
• # Chan: 2
• Sample Rate: 65MSPS
• Interface: Par
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: (2Vref) p-p,1 V p-p,2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: CSP,QFP

AD9238
TABLE OF CONTENTS
Specifications ..................................................................................... 4
Absolute Maximum Ratings ............................................................ 7
Pin Configurations and Function Descriptions............................ 8
Terminology .................................................................................... 10
Typical Performance Characteristics ........................................... 11
Equivalent Circuits ......................................................................... 15
Theory of Operation ...................................................................... 16
AD9238 LQFP Evaluation Board ................................................. 21
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
DC Specifications ......................................................................... 4
AC Specifications .......................................................................... 5
Digital Specifications ................................................................... 6
Switching Specifications .............................................................. 6
Explanation of Test Levels ........................................................... 7
ESD Caution .................................................................................. 7
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
Rev. C | Page 2 of 48
Dual ADC LFCSP PCB .................................................................. 34
Outline Dimensions ....................................................................... 45
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
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
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
Ordering Guide .......................................................................... 46