AD6653 Datasheet, PDF (2/80 Pages) Analog Devices – IF Diversity Receiver

AD6653
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Product Highlights ........................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description ......................................................................... 4
Specifications..................................................................................... 5
ADC DC Specifications ............................................................... 5
ADC AC Specifications ............................................................... 6
Digital Specifications ................................................................... 7
Switching Specifications .............................................................. 9
Timing Specifications ................................................................ 10
Absolute Maximum Ratings.......................................................... 13
Thermal Characteristics ............................................................ 13
ESD Caution................................................................................ 13
Pin Configurations and Function Descriptions ......................... 14
Equivalent Circuits ......................................................................... 18
Typical Performance Characteristics ........................................... 19
Theory of Operation ...................................................................... 24
ADC Architecture ...................................................................... 24
Analog Input Considerations.................................................... 24
Voltage Reference ....................................................................... 26
Clock Input Considerations ...................................................... 27
Power Dissipation and Standby Mode..................................... 29
Digital Outputs ........................................................................... 30
Digital Downconverter .................................................................. 31
Downconverter Modes .............................................................. 31
Numerically Controlled Oscillator (NCO) ............................. 31
Half-Band Decimating Filter and FIR Filter........................... 31
fADC/8 Fixed-Frequency NCO ................................................... 31
Numerically Controlled Oscillator (NCO) ................................. 32
Frequency Translation ............................................................... 32
NCO Synchronization ............................................................... 32
Phase Offset................................................................................. 32
NCO Amplitude and Phase Dither .......................................... 32
Decimating Half-Band Filter and FIR Filter ............................... 33
Half-Band Filter Coefficients.................................................... 33
Half-Band Filter Features .......................................................... 33
Fixed-Coefficient FIR Filter ...................................................... 33
Synchronization.......................................................................... 34
Combined Filter Performance.................................................. 34
Final NCO ................................................................................... 34
ADC Overrange and Gain Control.............................................. 35
Fast Detect Overview................................................................. 35
ADC Fast Magnitude ................................................................. 35
ADC Overrange (OR)................................................................ 36
Gain Switching............................................................................ 36
Signal Monitor ................................................................................ 38
Peak Detector Mode................................................................... 38
RMS/MS Magnitude Mode....................................................... 38
Threshold Crossing Mode......................................................... 39
Additional Control Bits ............................................................. 39
DC Correction ............................................................................ 39
Signal Monitor SPORT Output ................................................ 40
Channel/Chip Synchronization.................................................... 41
Serial Port Interface (SPI).............................................................. 42
Configuration Using the SPI..................................................... 42
Hardware Interface..................................................................... 42
Configuration Without the SPI ................................................ 43
SPI Accessible Features.............................................................. 43
Memory Map .................................................................................. 44
Reading the Memory Map Register Table............................... 44
Memory Map Register Table..................................................... 45
Memory Map Register Description ......................................... 49
Applications Information .............................................................. 53
Design Guidelines ...................................................................... 53
Evaluation Board ............................................................................ 55
Power Supplies ............................................................................ 55
Input Signals................................................................................ 55
Output Signals ............................................................................ 55
Default Operation and Jumper Selection Settings................. 56
Alternative Clock Configurations............................................ 56
Alternative Analog Input Drive Configuration...................... 57
Schematics................................................................................... 58
Evaluation Board Layouts ......................................................... 68
Bill of Materials........................................................................... 76
Outline Dimensions ....................................................................... 78
Ordering Guide .......................................................................... 78
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