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MICRF112 데이터시트(PDF) 25 Page - Microchip Technology

부품명 MICRF112
상세설명  The MICRF112 is a high-performance, easy-to-use, true “Data-In, RF-Out”, ASK/FSK, Phase-Locked Loop (PLL)- based, transmitter IC for applications in the 300 MHz to 450 MHz frequency range.
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MICRF112 데이터시트(HTML) 25 Page - Microchip Technology

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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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