ADF7012
TABLE OF CONTENTS
Specifications..................................................................................... 3
GOOK Modulation.................................................................... 15
Output Divider ........................................................................... 16
MUXOUT Modes....................................................................... 16
Theory of Operation ...................................................................... 17
Choosing the External Inductor Value.................................... 17
Choosing the Crystal/PFD Value............................................. 17
Tips on Designing the Loop Filter ........................................... 17
PA Matching................................................................................ 18
Transmit Protocol and Coding Considerations ..................... 18
Application Examples .................................................................... 19
315 MHz Operation................................................................... 20
433 MHz Operation................................................................... 21
868 MHz Operation................................................................... 22
915 MHz Operation................................................................... 23
Register Descriptions..................................................................... 24
R Register..................................................................................... 24
N-Counter Latch ........................................................................ 25
Modulation Register .................................................................. 26
Function Register ....................................................................... 27
Outline Dimensions....................................................................... 28
Ordering Guide .......................................................................... 28
Timing Characteristics..................................................................... 5
Absolute Maximum Ratings............................................................ 6
Transistor Count ........................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
315 MHz ........................................................................................ 8
433 MHz ........................................................................................ 9
868 MHz ...................................................................................... 10
915 MHz ...................................................................................... 11
Circuit Description......................................................................... 12
PLL Operation ............................................................................ 12
Crystal Oscillator........................................................................ 12
Crystal Compensation Register................................................ 12
Clock Out Circuit....................................................................... 12
Loop Filter ................................................................................... 13
Voltage-Controlled Oscillator (VCO) ..................................... 13
Voltage Regulators ...................................................................... 13
FSK Modulation.......................................................................... 13
GFSK Modulation ...................................................................... 14
Power Amplifier.......................................................................... 14
REVISION HISTORY
10/04—Revision 0: Initial Version
Rev. 0 | Page 2 of 28
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