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AD9775

Rev. E | Page 2 of 56

TABLE OF CONTENTS

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

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

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

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

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

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

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

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

Dynamic Specifications ............................................................... 6

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

Digital Filter Specifications ......................................................... 8

Absolute Maximum Ratings............................................................ 9

ESD Caution.................................................................................. 9

Thermal Resistance ...................................................................... 9

Pin Configuration and Function Descriptions........................... 10

Typical Performance Characteristics ........................................... 12

Terminology .................................................................................... 17

Mode Control (via SPI Port) ......................................................... 18

Address 0x00 ............................................................................... 19

Address 0x01 ............................................................................... 19

Address 0x02 ............................................................................... 19

Address 0x03 ............................................................................... 20

Address 0x04 ............................................................................... 20

Address 0x05, Address 0x09 ..................................................... 20

Address 0x06, Address 0x0A..................................................... 20

Address 0x07, Address 0x0B ..................................................... 20

Address 0x08, Address 0x0C..................................................... 20

Functional Description .................................................................. 21

Serial Interface for Register Control ........................................ 21

General Operation of the Serial Interface ............................... 21

Instruction Byte .......................................................................... 22

Serial Interface Port Pin Descriptions ..................................... 22

MSB/LSB Transfers..................................................................... 22

Notes on Serial Port Operation ................................................ 22

DAC Operation........................................................................... 24

1R/2R Mode ................................................................................ 25

Clock Input Configurations...................................................... 25

Programmable PLL .................................................................... 26

Power Dissipation....................................................................... 27

Sleep/Power-Down Modes........................................................ 28

Two-Port Data Input Mode ...................................................... 28

PLL Enabled, Two-Port Mode .................................................. 28

DATACLK Inversion.................................................................. 29

DATACLK Driver Strength....................................................... 29

PLL Enabled, One-Port Mode .................................................. 29

ONEPORTCLK Inversion......................................................... 29

ONEPORTCLK Driver Strength.............................................. 30

IQ Pairing .................................................................................... 30

PLL Disabled, Two-Port Mode................................................. 30

PLL Disabled, One-Port Mode ................................................. 30

Digital Filter Modes ................................................................... 31

Amplitude Modulation.............................................................. 31

Modulation, No Interpolation .................................................. 32

Modulation, Interpolation = 2× ............................................... 33

Modulation, Interpolation = 4× ............................................... 34

Modulation, Interpolation = 8× ............................................... 35

Zero Stuffing ............................................................................... 36

Interpolating (Complex Mix Mode)........................................ 36

Operations on Complex Signals............................................... 36

Complex Modulation and Image Rejection of Baseband

Signals .......................................................................................... 37

Image Rejection and Sideband Suppression of Modulated

Carriers ........................................................................................ 38

Applying the Output Configurations........................................... 42

Unbuffered Differential Output, Equivalent Circuit ............. 42

Differential Coupling Using a Transformer............................ 42

Differential Coupling Using an Op Amp................................ 43

Interfacing the AD9775 with the AD8345 Quadrature

Modulator.................................................................................... 43

Evaluation Board ............................................................................ 44

Outline Dimensions ....................................................................... 54

Ordering Guide .......................................................................... 54

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