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ADF7012BRU-REEL Folha de dados(PDF) 2 Page - Analog Devices |
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ADF7012BRU-REEL Folha de dados(HTML) 2 Page - Analog Devices |
2 / 28 page ADF7012 Rev. A | Page 2 of 28 TABLE OF CONTENTS Features .............................................................................................. 1 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 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 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 |
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Descrição semelhante - ADF7012BRU-REEL |
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