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CC2400-RTR1 数据表(PDF) 11 Page - Texas Instruments |
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CC2400-RTR1 数据表(HTML) 11 Page - Texas Instruments |
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11 / 83 page ![]() CC2400 SWRS042A Page 11 of 83 10 RSSI / Carrier Sense section Parameter Min. Typ. Max. Unit Condition / Note For 1Mbps and 1 MHz channel width. RSSI range / Carrier sense range 80 dB (The range is from –100 dBm to –20 dBm typically) RSSI settling time 20 s RSSI accuracy ± 4 dB See page 44 for details Table 6 RSSI / Carrier sense characteristics 11 IF section Parameter Min. Typ. Max. Unit Condition / Note Intermediate frequency (IF) 1 MHz Digital channel filter bandwidth 125 1000 kHz The digital channel filter 6dB- bandwidth is programmable in steps: 125, 250, 500 and 1000 kHz. See page 39 for details. Table 7 IF characteristics 12 Frequency Synthesizer section Parameter Min. Typ. Max. Unit Condition / Note Crystal oscillator frequency 16 MHz See page 49 for details. Crystal frequency accuracy requirement 20 ±ppm The total crystal frequency accuracy, i.e. initial tolerance plus aging and temperature dependency, will determine the frequency accuracy of the transmitted signal. 1 Mbps FSK, 250 kHz deviation. Crystal operation Parallel C4 and C5 are loading capacitors, see page 49 Crystal load capacitance 12 16 20 pF 16 pF recommended Crystal ESR 60 Ω Crystal oscillator start-up time 1.13 ms 16 pF load Note: This time can be reduced to 15 s by enabling the XOSC core in power-down using the MANAND register. Phase noise -108 -114 -114 dBc/Hz dBc/Hz dBc/Hz Unmodulated carrier At ±1 MHz offset from carrier At ±2 MHz offset from carrier At ±5 MHz offset from carrier PLL loop bandwidth 50 kHz |
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