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MRF49XA-I/T データシート(PDF) 82 Page - Microchip Technology |
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MRF49XA-I/T データシート(HTML) 82 Page - Microchip Technology |
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82 / 102 page  MRF49XA DS70590C-page 82 Preliminary © 2009-2011 Microchip Technology Inc. Note 1: Typical Values: TA = 25°C, VDD = 3.3V. TABLE 5-6: PLL PARAMETERS AC CHARACTERISTICS(1) Note 1: Typical Values: TA = 25°C, VDD = 3.3V. TABLE 5-5: TRANSMITTER AC CHARACTERISTICS(1) Parameters Condition Min Typ Max Unit RF Carrier Frequency 433 MHz band, 2.5 kHz resolution 430.24 — 439.75 MHz 868 MHz band, 5.0 kHz resolution 860.48 — 879.51 MHz 915 MHz band, 7.5 kHz resolution 900.72 — 929.27 MHz Maximum RF Output Power 433 MHz @ 50 Ω load — 7 — dBm 868 MHz @ 50 Ω load — 5 — dBm 915 MHz @ 50 Ω load — 5 — dBm RF Output Power Control Range In steps of 8 Pmax – 17.5 — Pmax dBm TX Gain Control Resolution Programmed in 8 steps — 2.5 — dB Harmonic Suppression At maximum power, 50 Ω load — — -35 dBc Open-Collector Output DC Current Programmable 0.5 — 6 mA Spurious Emission | f-fsp | > 1 MHz At maximum power, 50 Ω load — — -55 dBc Output Capacitance (Set by the Automatic Antenna Tuning Circuit) 433 MHz band 2 2.6 3.2 pF 868 MHz band 2.1 2.7 3.3 pF 915 MHz band 2.1 2.7 3.3 pF Quality Factor of the Output Capacitance 433 MHz band 13 15 17 — 868 MHz band 8 10 12 — 915 MHz band 8 10 12 — Output Phase Noise 100 kHz from carrier — -80 — dBc/Hz 1 MHz from carrier — -103 — dBc/Hz FSK Bit Rate Internal TX Data register — — 172 kbps FSK Bit Rate TX data connected to the FSK input — — 256 kbps FSK Frequency Deviation Programmable in 15 kHz steps 15 — 240 kHz Parameters Condition/Note Min Typ Max Unit PLL Reference Frequency Crystal related timing and fre- quency parameters change according to the PLL reference frequency 910 11 MHz PLL Lock Time Frequency error <1 kHz after 10 MHz step —30 — μs PLL Start-up Time With a running crystal oscillator and based on the design — 200 300 μs |
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