AD9854
Rev. E | Page 2 of 52
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
General Description......................................................................... 4
Specifications..................................................................................... 5
Absolute Maximum Ratings............................................................ 8
Thermal Resistance ...................................................................... 8
Explanation of Test Levels........................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 12
Typical Applications....................................................................... 16
Theory of Operation ...................................................................... 19
Modes of Operation ................................................................... 19
Using the AD9854 .......................................................................... 29
Internal and External Update Clock........................................ 29
On/Off Output Shaped Keying (OSK) .................................... 29
I and Q DACs.............................................................................. 30
Control DAC ............................................................................... 30
Inverse Sinc Function ................................................................ 31
REFCLK Multiplier .................................................................... 31
Programming the AD9854............................................................ 32
MASTER RESET ........................................................................ 32
Parallel I/O Operation ............................................................... 34
Serial Port I/O Operation.......................................................... 34
General Operation of the Serial Interface ................................... 36
Instruction Byte.......................................................................... 37
Serial Interface Port Pin Descriptions..................................... 37
Notes on Serial Port Operation ................................................ 37
MSB/LSB Transfers......................................................................... 38
Control Register Description.................................................... 38
Power Dissipation and Thermal Considerations ....................... 40
Thermal Impedance................................................................... 40
Junction Temperature Considerations .................................... 40
Evaluation of Operating Conditions........................................ 41
Thermally Enhanced Package Mounting Guidelines................ 41
Evaluation Board ............................................................................ 42
Evaluation Board Instructions.................................................. 42
General Operating Instructions ............................................... 42
Using the Provided Software .................................................... 44
Support ........................................................................................ 44
Outline Dimensions ....................................................................... 52
Ordering Guide .......................................................................... 52
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