AD6649 Analog Devices, AD6649 Datasheet - Page 2

• Manufacturer Part Number: AD6649
• Description: IF Diversity Receiver
• Manufacturer: Analog Devices

AD6649
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
Typical Performance Characteristics ........................................... 13
Equivalent Circuits ......................................................................... 16
Theory of Operation ...................................................................... 17
Digital Processing ........................................................................... 22
REVISION HISTORY
9/11—Rev. 0 to Rev. A
Changes to Table 1 ............................................................................ 4
Changes to Table 3 ............................................................................ 6
Changes to Table 4 ............................................................................ 8
Changes to Table 8 .......................................................................... 11
Added Overrange (OR) Section ................................................... 21
Changes to Channel/Chip Synchronization Section ................. 28
Change to the NCO/FIR SYNC Pin Control (Register 0x59) .. 38
4/11—Revision 0: Initial Version
ADC DC Specifications ................................................................. 4
ADC AC Specifications ................................................................. 5
Digital Specifications ..................................................................... 6
Switching Specifications ................................................................ 8
Timing Specifications .................................................................. 9
Thermal Characteristics ............................................................ 10
ESD Caution ................................................................................ 10
ADC Architecture ...................................................................... 17
Analog Input Considerations .................................................... 17
Voltage Reference ....................................................................... 19
Clock Input Considerations ...................................................... 19
Power Dissipation and Standby Mode ..................................... 20
Digital Outputs ........................................................................... 21
Overrange (OR) .......................................................................... 21
Numerically Controlled Oscillator (NCO) ............................. 22
Rev. A | Page 2 of 40
Numerically Controlled Oscillator (NCO) ................................. 23
FIR Filters ........................................................................................ 24
ADC Overrange and Gain Control .............................................. 26
DC Correction ................................................................................ 27
Channel/Chip Synchronization .................................................... 28
Serial Port Interface (SPI) .............................................................. 29
Memory Map .................................................................................. 31
Applications Information .............................................................. 39
Outline Dimensions ....................................................................... 40
NCO and FIR Filter Modes ....................................................... 22
f
Frequency Translation ............................................................... 23
NCO Synchronization ............................................................... 23
NCO Amplitude and Phase Dither .......................................... 23
FIR Synchronization .................................................................. 24
Filter Performance ...................................................................... 24
Output NCO ............................................................................... 25
ADC Overrange (OR) ................................................................ 26
Gain Switching ............................................................................ 26
Configuration Using the SPI ..................................................... 29
Hardware Interface ..................................................................... 29
SPI Accessible Features .............................................................. 30
Reading the Memory Map Register Table ............................... 31
Memory Map Register Table ..................................................... 32
Memory Map Register Description ......................................... 36
Design Guidelines ...................................................................... 39
Ordering Guide .......................................................................... 40
S
/4 Fixed-Frequency NCO ....................................................... 22
Data Sheet