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CC1110FX датащи(PDF) 21 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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CC1110FX датащи(HTML) 21 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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21 / 240 page ![]() CC1110Fx / CC1111Fx SWRS033E Page 21 of 239 7.5 32.768 kHz Crystal Oscillator TA = 25 °C, VDD = 3.0V if nothing else is stated. Parameter Min Typ Max Unit Condition/Note Crystal frequency 32.768 kHz Crystal shunt capacitance 0.9 2.0 pF Simulated over operating conditions Load capacitance 12 16 pF Simulated over operating conditions ESR 40 130 k Ω Simulated over operating conditions Start-up time 400 ms Value is simulated Table 13: 32.768 kHz Crystal Oscillator Parameters 7.6 Low Power RC Oscillator TA = 25 °C, VDD = 3.0 V if nothing else is stated. Parameter Min Typ Max Unit Condition/Note Calibrated frequency 2 32.0 34.7 36.0 kHz Calibrated low power RC oscillator frequency is fXOSC / 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 low power RC oscillator is enabled, calibration is continuously done in the background as long as the high speed crystal oscillator is running. Table 14: Low Power RC Oscillator Parameters 2 Min figures are given using f XOSC = 24 MHz. Typical figures are given using fXOSC = 26 MHz, and Max figures are given using fXOSC = 27 MHz |
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