AD9208 datasheet(3/137 Pages) AD

Part #	AD9208

Description	14-Bit, 3 GSPS, JESD204B, Dual Analog-to-Digital Converter

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Manufacturer	AD [Analog Devices]

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3 / 137 page

AD9208

Data Sheet

Rev. 0 | Page 2 of 136

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications....................................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 3

General Description ......................................................................... 4

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

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

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

Digital Specifications ................................................................... 7

Switching Specifications .............................................................. 9

Timing Specifications ................................................................ 10

Absolute Maximum Ratings.......................................................... 12

Thermal Resistance .................................................................... 12

ESD Caution................................................................................ 12

Pin Configuration and Function Descriptions........................... 13

Typical Performance Characteristics ........................................... 16

Equivalent Circuits ......................................................................... 22

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

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

Analog Input Considerations.................................................... 24

Voltage Reference ....................................................................... 28

DC Offset Calibration................................................................ 29

Clock Input Considerations ...................................................... 29

Power-Down/Standby Mode..................................................... 31

Temperature Diode .................................................................... 31

ADC Overrange and Fast Detect.................................................. 33

ADC Overrange.......................................................................... 33

Fast Threshold Detection (FD_A and FD_B) ........................ 33

ADC Application Modes and JESD204B Tx Converter Mapping

........................................................................................................... 34

Programmable FIR filters .............................................................. 36

Supported Modes........................................................................ 36

Programming Instructions........................................................ 38

Digital Downconverter (DDC)..................................................... 40

DDC I/Q Input Selection .......................................................... 40

DDC I/Q Output Selection ....................................................... 40

DDC General Description ........................................................ 40

DDC Frequency Translation..................................................... 43

DDC Decimation Filters............................................................ 51

DDC Gain Stage ......................................................................... 57

DDC Complex to Real Conversion ......................................... 57

DDC Mixed Decimation Settings ............................................ 58

DDC Example Configurations ................................................. 59

DDC Power Consumption........................................................ 63

Signal Monitor ................................................................................ 64

SPORT over JESD204B.............................................................. 65

Digital Outputs ............................................................................... 67

Introduction to the JESD204B Interface ................................. 67

JESD204B Overview .................................................................. 67

Functional Overview ................................................................. 68

JESD204B Link Establishment ................................................. 68

Physical Layer (Driver) Outputs .............................................. 70

fS × 4 Mode .................................................................................. 71

Setting Up the AD9208 digital interface.................................. 72

Deterministic Latency.................................................................... 78

Subclass 0 Operation.................................................................. 78

Subclass 1 Operation.................................................................. 78

Multichip Synchronization............................................................ 80

Normal Mode.............................................................................. 80

Timestamp Mode ....................................................................... 80

SYSREF Input.............................................................................. 82

SYSREF± Setup/Hold Window Monitor................................. 84

Latency............................................................................................. 86

End to End Total Latency.......................................................... 86

Example Latency Calculations.................................................. 86

LMFC Referenced Latency........................................................ 86

Test Modes....................................................................................... 88

ADC Test Modes ........................................................................ 88

JESD204B Block Test Modes .................................................... 89

Serial Port Interface........................................................................ 91

Configuration Using the SPI..................................................... 91

Hardware Interface..................................................................... 91

SPI Accessible Features.............................................................. 91

Memory Map .................................................................................. 92

Reading the Memory Map Register Table............................... 92

Memory Map Register Details.................................................. 93

Applications Information ............................................................ 134

Power Supply Recommendations........................................... 134

Layout Guidelines..................................................................... 135

AVDD1_SR (Pin E7) and AGND (Pin E6 and Pin E8)........... 135

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