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ADF7012
TABLE OF CONTENTS
Specifications.....................................................................................3
Rev. 0 | Page 2 of 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
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
REVISION HISTORY
10/04—Revision 0: Initial Version