AD9912ABCPZ Datasheet, PDF (2/40 Pages) Analog Devices – 1 GSPS Direct Digital Synthesizer with 14-Bit DAC

AD9912
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Basic Block Diagram ........................................................................ 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
DC Specifications ......................................................................... 4
AC Specifications.......................................................................... 6
Absolute Maximum Ratings............................................................ 8
Thermal Resistance ...................................................................... 8
ESD Caution.................................................................................. 8
Pin Configuration and Function Descriptions............................. 9
Typical Performance Characteristics ........................................... 11
Input/Output Termination Recommendations .......................... 16
Theory of Operation ...................................................................... 17
Overview...................................................................................... 17
Direct Digital Synthesizer (DDS) ............................................. 17
Digital-to-Analog (DAC) Output ............................................ 18
Reconstruction Filter ................................................................. 18
FDBK_IN Inputs ........................................................................ 19
SYSCLK Inputs ........................................................................... 20
Output Clock Drivers and 2× Frequency Multiplier ............. 22
Harmonic Spur Reduction ........................................................ 22
Thermal Performance .................................................................... 24
Power-Up ......................................................................................... 25
Power-On Reset .......................................................................... 25
Default Output Frequency on Power-Up................................ 25
Power Supply Partitioning............................................................. 26
3.3 V Supplies.............................................................................. 26
1.8 V Supplies.............................................................................. 26
Serial Control Port ......................................................................... 27
Serial Control Port Pin Descriptions ....................................... 27
Operation of Serial Control Port.............................................. 27
The Instruction Word (16 Bits) ................................................ 28
MSB/LSB First Transfers ........................................................... 28
I/O Register Map ............................................................................ 31
I/O Register Descriptions.............................................................. 33
Serial Port Configuration (Register 0x0000 to
Register 0x0005) ......................................................................... 33
Power-Down and Reset (Register 0x0010 to
Register 0x0013) ......................................................................... 33
System Clock (Register 0x0020 to Register 0x0022) ............. 34
CMOS Output Divider (S-Divider) (Register 0x0100 to
Register 0x0106) ......................................................................... 35
Frequency Tuning Word (Register 0x01A0 to
Register 0x01AD) ....................................................................... 35
Doubler and Output Drivers (Register 0x0200 to
Register 0x0201) ......................................................................... 37
Calibration (User-Accessible Trim) (Register 0x0400 to
Register 0x0410) ......................................................................... 37
Harmonic Spur Reduction (Register 0x0500 to
Register 0x0509) ......................................................................... 37
Outline Dimensions ....................................................................... 39
Ordering Guide .......................................................................... 39
Rev. F | Page 2 of 40