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数据搜索系统，热门电子元器件搜索 |
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SN250 数据表(PDF) 19 Page - STMicroelectronics |
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SN250 数据表(HTML) 19 Page - STMicroelectronics |
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19 / 130 page  SN250 Electrical characteristics 19/130 5.5.2 Transmit Table 8 lists the key parameters of the integrated IEEE 802.15.4 transmitter on the SN250. 5.5.3 Synthesizer Table 9 lists the key parameters of the integrated synthesizer on the SN250. Table 8. Transmit characteristics Parameter Test Conditions Min. Typ. Max. Unit Maximum output power (boost mode) At highest power setting 5 dBm Maximum output power At highest power setting 0 3 dBm Minimum output power At lowest power setting − 32 dBm Error vector magnitude As defined by IEEE 802.15.4, which sets a 35% maximum 15 25 % Carrier frequency error − 40 + 40 ppm Load impedance 200 Ω PSD mask relative 3.5MHz away − 20 dB PSD mask absolute 3.5MHz away − 30 dBm Table 9. Synthesizer characteristics Parameter Test Conditions Min. Typ. Max. Unit Frequency range 2400 2500 MHz Frequency resolution 11.7 kHz Lock time From off, with correct VCO DAC setting 100 μs Relock time Channel change or RX/TX turnaround (IEEE 802.15.4 defines 192 μs turnaround time) 100 μs Phase noise at 100kHz − 71 dBc/Hz Phase noise at 1MHz − 91 dBc/Hz Phase noise at 4MHz − 103 dBc/Hz Phase noise at 10MHz − 111 dBc/Hz |
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