ADF7012
TABLE OF CONTENTS
Features .............................................................................................. 1
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 ........................................... 18
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
Register 0: R Register ................................................................. 24
Register 1: N-Counter Latch..................................................... 25
Register 2: Modulation Register............................................... 26
Register 3: Function Register.................................................... 27
Outline Dimensions....................................................................... 28
Ordering Guide .......................................................................... 28
Applications....................................................................................... 1
General Description......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
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
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
REVISION HISTORY
6/09—Rev. 0 to Rev. A
Updated Format..................................................................Universal
Changes to Table 4............................................................................ 7
Changes to Crystal Oscillator Section ......................................... 12
Changes to Loop Filter Section..................................................... 13
Changes to GFSK Modulation Section........................................ 14
Changes to Choosing the External Inductor Value Section ..... 17
Changes to Component Values—Crystal: 3.6864 MHz ............ 20
Changes to Component Values—Crystal: 4.9152 MHz ............ 21
Changes to Component Values—Crystal: 4.9152 MHz ............ 22
Changes to Component Values—Crystal: 10 MHz.................... 23
Added Register Headings Throughout........................................ 24
Changes to Ordering Guide .......................................................... 28
10/04—Revision 0: Initial Version
Rev. A | Page 2 of 28
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