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SI4012 Arkusz danych(PDF) 6 Page - Silicon Laboratories |
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SI4012 Arkusz danych(HTML) 6 Page - Silicon Laboratories |
6 / 16 page Si4012 6 Rev 0.1 Transmit Power3 Maximum programmed Tx power, with optimum differential load, VDD > 2.2 V — 10 — dBm Minimum programmed TX power, with optimum differential load, VDD > 2.2 V —–13 — dBm Power variation vs temp and supply, with optimum differential load, VDD >2.2 V –1.0 — 0.5 dB Power variation vs temp and supply, with optimum differential load, VDD >1.8 V –2.5 — 0.5 dB Transmit power step size from –13 to 6.5 dBm —0.25 — dB PA Edge Ramp Rate Programmable Range OOK mode 0.34 — 10.7 us Data Rate OOK 0.1 — 50 kbaud FSK 0.1 — 100 kbaud Table 3. Si4012 RF Transmitter Characteristics (Continued) (TA = 25° C, VDD = 3.3 V, RL = 550 , unless otherwise noted) Parameter Symbol Test Condition Min Typ Max Unit Notes: 1. The frequency range is continuous over the specified range. 2. The frequency step size is limited by the frequency noise. 3. Optimum differential load is equal to 4 V/(11.5mA/2 * 4/PI) = 550 Therefore the antenna load resistance in parallel with the Si4012 differential output resistance should equal 600 |
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