AD6652PCB datasheet(2/76 Pages) AD

2 / 76 page

AD6652

Rev. 0 | Page 2 of 76

TABLE OF CONTENTS

Product Description ......................................................................... 4

Product Highlights ....................................................................... 4

Specifications..................................................................................... 5

Recommended Operating Conditions ...................................... 5

ADC DC Specifications............................................................... 5

ADC Switching Specifications.................................................... 5

ADC AC Specifications ............................................................... 6

Electrical Characteristics ............................................................. 7

General Timing Characteristics ................................................. 8

Microprocessor Port Timing Characteristics ........................... 9

Absolute Maximum Ratings.......................................................... 10

Thermal Characteristics ............................................................ 10

Test Level ..................................................................................... 10

ESD Caution................................................................................ 10

Pin Configuration and Function Descriptions........................... 11

Typical Performance Characteristics ........................................... 14

DDC Timing Diagrams ................................................................. 17

Terminology .................................................................................... 23

ADC Equivalent Circuits........................................................... 23

Theory of Operation ...................................................................... 24

ADC Architecture ...................................................................... 24

Digital Downconverter Architecture Overview ......................... 29

Data Input Matrix....................................................................... 29

Numerically Controlled Oscillator........................................... 29

Second-Order rCIC Filter ......................................................... 29

Fifth-Order CIC Filter ............................................................... 29

RAM Coefficient Filter .............................................................. 29

Interpolating Half-Band Filters and AGC............................... 29

Control Register and Memory Map Address Notation ............. 31

DDC Input Matrix...................................................................... 31

DDC Data Latency ..................................................................... 31

Gain Switching............................................................................ 31

Numerically Controlled Oscillator............................................... 33

Frequency Translation to Baseband......................................... 33

NCO Shadow Register ............................................................... 33

NCO Frequency Hold-Off Register......................................... 33

Phase Offset................................................................................. 33

NCO Control Register ............................................................... 33

Second-Order rCIC Filter ............................................................. 35

rCIC2 Scale Factor ..................................................................... 35

rCIC2 Output Level ................................................................... 36

rCIC2 Rejection.......................................................................... 36

Decimation and Interpolation Registers ................................. 36

rCIC2 Scale Register .................................................................. 36

Fifth-Order CIC Filter ................................................................... 37

CIC5 Rejection ........................................................................... 37

RAM Coefficient Filter .................................................................. 38

RCF Decimation Register.......................................................... 38

RCF Decimation Phase.............................................................. 38

RCF Filter Length....................................................................... 38

RCF Output Scale Factor and Control Register ..................... 39

Interpolating Half-Band Filters .................................................... 40

Automatic Gain Control................................................................ 41

AGC Loop ................................................................................... 41

Desired Signal Level Mode........................................................ 41

Synchronization.......................................................................... 44

User-Configurable Built-In Self-Test (BIST) .............................. 45

RAM BIST ................................................................................... 45

Channel BIST.............................................................................. 45

Channel/Chip Synchronization.................................................... 46

Start .............................................................................................. 46

Hop............................................................................................... 48

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