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CC1010-RTR1 데이터시트(PDF) 12 Page - Texas Instruments |
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CC1010-RTR1 데이터시트(HTML) 12 Page - Texas Instruments |
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12 / 152 page ![]() CC1010 SWRS047 Page 12 of 152 11. Frequency synthesizer section Parameter Min. Typ. Max. Unit Condition Crystal Oscillator Frequency 3 24 MHz Crystal frequency can be 3-4, 6-8 or 9-24 MHz. Recommended frequencies are 3.6864, 7.3728, 11.0592, 14.7456, 18.4320 and 22.1184 MHz. See page 32 for details Crystal frequency accuracy requirement ± 50 ± 25 ppm 433 MHz 868 MHz The crystal frequency accuracy and drift (ageing and temperature dependency) will determine the frequency accuracy of the transmitted signal. Crystal operation Parallel C171 and C181 are loading capacitors Crystal load capacitance 12 12 12 12 20 16 16 12 30 30 16 16 pF pF pF pF 3-4 MHz, 20 pF recommended 6-8 MHz, 16 pF recommended 9-16 MHz, 16 pF recommended 16-24 MHz, 12 pF recommended Crystal oscillator start-up time 5 1.5 2 ms ms ms 3.6864 MHz, 16 pF load 7.3728 MHz, 16 pF load 16 MHz, 16 pF load Output signal phase noise -85 dBc/Hz At 100 kHz offset from carrier PLL lock time (RX / TX turn time) 200 µs PLL turn-on time 250 µs Table 10. Frequency synthesizer characteristics |
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