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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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CC1100-RTY1 데이터시트(PDF) 15 Page - Texas Instruments |
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CC1100-RTY1 데이터시트(HTML) 15 Page - Texas Instruments |
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15 / 100 page  CC1100 SWRS038D Page 15 of 92 4.5 Low Power RC Oscillator Tc = 25 °C, VDD = 3.0 V if nothing else is stated. All measurement results obtained using the CC1100EM reference designs ([5] and [6]). Parameter Min Typ Max Unit Condition/Note Calibrated frequency 34.7 34.7 36 kHz Calibrated RC Oscillator frequency is XTAL frequency divided by 750 Frequency accuracy after calibration ±1 % Temperature coefficient +0.5 % / °C Frequency drift when temperature changes after calibration Supply voltage coefficient +3 % / V Frequency drift when supply voltage changes after calibration Initial calibration time 2 ms When the RC Oscillator is enabled, calibration is continuously done in the background as long as the crystal oscillator is running. Table 8: RC Oscillator Parameters 4.6 Frequency Synthesizer Characteristics Tc = 25 °C @ VDD = 3.0 V if nothing else is stated. All measurement results are obtained using the CC1100EM reference designs ([5] and [6]). Min figures are given using a 27 MHz crystal. Typ and max are given using a 26 MHz crystal. Parameter Min Typ Max Unit Condition/Note Programmed frequency resolution 397 FXOSC/ 2 16 412 Hz 26-27 MHz crystal. The resolution (in Hz) is equal for all frequency bands. Synthesizer frequency tolerance ±40 ppm Given by crystal used. Required accuracy (including temperature and aging) depends on frequency band and channel bandwidth / spacing. RF carrier phase noise –89 dBc/Hz @ 50 kHz offset from carrier RF carrier phase noise –89 dBc/Hz @ 100 kHz offset from carrier RF carrier phase noise –90 dBc/Hz @ 200 kHz offset from carrier RF carrier phase noise –98 dBc/Hz @ 500 kHz offset from carrier RF carrier phase noise –107 dBc/Hz @ 1 MHz offset from carrier RF carrier phase noise –113 dBc/Hz @ 2 MHz offset from carrier RF carrier phase noise –119 dBc/Hz @ 5 MHz offset from carrier RF carrier phase noise –129 dBc/Hz @ 10 MHz offset from carrier PLL turn-on / hop time 85.1 88.4 88.4 µs Time from leaving the IDLE state until arriving in the RX, FSTXON or TX state, when not performing calibration. Crystal oscillator running. PLL RX/TX settling time 9.3 9.6 9.6 µs Settling time for the 1·IF frequency step from RX to TX PLL TX/RX settling time 20.7 21.5 21.5 µs Settling time for the 1·IF frequency step from TX to RX PLL calibration time 694 721 721 µs Calibration can be initiated manually or automatically before entering or after leaving RX/TX. Table 9: Frequency Synthesizer Parameters |
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