AD9271 Analog Devices, AD9271 Datasheet - Page 2

• Manufacturer Part Number: AD9271
• Description: Octal LNA/VGA/AAF/ADC and Crosspoint Switch
• Manufacturer: Analog Devices

Specifications of AD9271

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 50MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 0.25 V p-p,0.32 V p-p,0.4 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD9271
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Product Highlights ........................................................................... 3
Specifications ..................................................................................... 4
Absolute Maximum Ratings .......................................................... 10
Pin Configuration and Function Descriptions ........................... 11
Equivalent Circuits ......................................................................... 14
Typical Performance Characteristics ........................................... 16
Theory of Operation ...................................................................... 20
REVISION HISTORY
5/09—Rev. A to Rev. B
Changes to Figure 27 ...................................................................... 17
Changes to Figure 40 and Figure 41 ............................................. 21
Changes to Ordering Guide .......................................................... 58
12/07—Rev. 0 to Rev. A
Change to AC Specifications Text .................................................. 4
Added Input Noise Current ............................................................ 4
Added Noise Figure .......................................................................... 4
Changes to Signal-to-Noise Ratio Units ........................................ 4
Changes to Harmonic Distortion Units ........................................ 5
Added Endnote 3 .............................................................................. 6
Changes to Table 6 .......................................................................... 11
Inserted Figure 19 and Figure 21 .................................................. 16
Changes to Figure 20 ...................................................................... 16
Changes to Theory of Operation Section .................................... 20
Changes to Figure 40 and Figure 41 ............................................. 21
Change to Active Impedance Matching Section ........................ 22
AC Specifications .......................................................................... 4
Digital Specifications ................................................................... 7
Switching Specifications .............................................................. 8
ADC Timing Diagrams ............................................................... 9
Thermal Impedance ................................................................... 10
ESD Caution ................................................................................ 10
Ultrasound ................................................................................... 20
Channel Overview ...................................................................... 21
Input Overdrive .......................................................................... 23
CW Doppler Operation ............................................................. 24
Rev. B | Page 2 of 60
Serial Port Interface (SPI) .............................................................. 35
Memory Map .................................................................................. 37
Applications Information .............................................................. 41
Evaluation Board ............................................................................ 42
Outline Dimensions ....................................................................... 58
Changes to LNA Noise Section .................................................... 22
Changes to Figure 43 ...................................................................... 22
Change to Input Overload Protection Section ........................... 23
Changes to TGC Operation Section ............................................ 25
Changes to Gain Control Section ................................................. 26
Changes to Figure 52 ...................................................................... 26
Change to Table 11 ......................................................................... 33
Changes to Serial Interface Port (SPI) Section ........................... 35
Changes to Hardware Interface Section ...................................... 35
Changes to Reading the Memory Map Table Section ............... 37
Added Applications Information and
Change to Input Signals Section ................................................... 42
Changes to Figure 73 ...................................................................... 42
Changes to Table 16 ....................................................................... 55
6/07—Revision 0: Initial Version
TGC Operation ........................................................................... 25
ADC ............................................................................................. 27
Clock Input Considerations ...................................................... 28
Hardware Interface ..................................................................... 35
Reading the Memory Map Table .............................................. 37
Reserved Locations .................................................................... 37
Default Values ............................................................................. 37
Logic Levels ................................................................................. 37
Design Guidelines ...................................................................... 41
Power Supplies ............................................................................ 42
Input Signals................................................................................ 42
Output Signals ............................................................................ 42
Default Operation and Jumper Selection Settings ................. 43
Quick Start Procedure ............................................................... 44
Schematics and Artwork ........................................................... 45
Ordering Guide .......................................................................... 58
Design Guidelines Sections ...................................................... 41