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MICRF112 Datasheet(PDF) 24 Page - Microchip Technology |
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MICRF112 Datasheet(HTML) 24 Page - Microchip Technology |
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24 / 46 page  MICRF112 Functional Description Data Sheet © 2024 Microchip Technology Inc. and its subsidiaries DS70005554A - 24 6. Functional Description The following figure illustrates a functional block diagram of the MICRF112 transmitter. The MICRF112 can be best described as a phase-locked transmitter. The system can be partitioned into six functional blocks: crystal oscillator, PLL×32, power amplifier, enable control, undervoltage detect and open-drain switch for FSK operation. Figure 6-1. Functional Block Diagram MICRF112 10 Pin ASK/FSK Version Crystal Oscillator The reference oscillator is a crystal-based pierce configuration. It is designed to accept crystals with frequencies from 9.375 MHz to 14.0625 MHz. Crystal Oscillator Parameters for ASK Operation The following figure illustrates a reference oscillator circuit configuration for ASK operation. The reference oscillator can drive crystals with an ESR range from 20Ω to 300Ω. |
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