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CC1111F8RSP 数据表(PDF) 21 Page - Texas Instruments |
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CC1111F8RSP 数据表(HTML) 21 Page - Texas Instruments |
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21 / 247 page  CC1110Fx / CC1111Fx SWRS033G Page 21 of 244 6.7 High Speed RC Oscillator TA = 25C, VDD = 3.0 V if nothing else is stated. Parameter Min Typ Max Unit Condition/Note Calibrated frequency 2 12 13 13.5 MHz Calibrated HS RCOSC frequency is fXOSC / 2 Uncalibrated frequency accuracy 15 % Calibrated frequency accuracy 1 % Start-up time 10 µs Temperature coefficient −325 ppm/ C Frequency drift when temperature changes after calibration Supply voltage coefficient 28 ppm/V Frequency drift when supply voltage changes after calibration Calibration time 65 µs The HS RCOSC will be calibrated once when the high speed crystal oscillator is selected as system clock source (CLKCON.OSC is set to 0), and also when the system wakes up from PM{1 - 3} if CLKCON.OSC was set to 0 when entering PM{1 - 3}. See 12.1.5.1 for details). Table 15: High Speed RC Oscillator Parameters 6.8 Frequency Synthesizer Characteristics TA = 25C, VDD = 3.0 V if nothing else stated. All measurement results are obtained using the CC1110EM reference designs ([1]). Parameter Min Typ Max Unit Condition/Note Programmed frequency resolution 3 397 366 397 366 412 366 Hz CC1110Fx CC1111Fx Frequency resolution = fRef/ 2 16 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 −92 dBc/Hz @ 50 kHz offset from carrier RF carrier phase noise −93 dBc/Hz @ 100 kHz offset from carrier RF carrier phase noise −93 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 3 f Ref = fXOSC for CC1110Fx and fRef = fXOSC /2 for CC1111Fx For CC1110Fx Min figures are given using f XOSC = 26 MHz. Typ figures are given using fXOSC = 26 MHz, and Max figures are given using fXOSC = 27 MHz. For CC1111Fx, fXOSC = 48 MHz |
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