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MICRF112 Datasheet(PDF) 25 Page - Microchip Technology |
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MICRF112 Datasheet(HTML) 25 Page - Microchip Technology |
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25 / 46 page  MICRF112 Functional Description Data Sheet © 2024 Microchip Technology Inc. and its subsidiaries DS70005554A - 25 Figure 6-2. Reference Oscillator ASK Operation When the ESR of the crystal is at 20Ω, the crystal parameter limits are: ESR 20Ω CPAR 2 to 10 pF CMO 10 to 40 fF When the ESR of the crystal is at 300Ω, the crystal parameter limits are: ESR 300Ω CPAR 2 to 5 pF CMO 10 to 40 fF CLOAD 10 to 30 pF Crystal Oscillator for FSK Operation The following figure illustrates the reference oscillator circuit configuration for FSK operation. To operate the MICRF112 in FSK mode, one additional capacitor is needed between XTLOUT pin and the XTAL_MOD pin. Crystal parameters for FSK operation are the same as for ASK operation except: • When the ESR of crystal is at 20Ω, CFSK+ CLOAD must not exceed 70 pF. • When the ESR of crystal is at 300Ω, CFSK + CLOAD must not exceed 30 pF. |
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