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RFM68CW-915S2 Datasheet(PDF) 11 Page - List of Unclassifed Manufacturers |
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RFM68CW-915S2 Datasheet(HTML) 11 Page - List of Unclassifed Manufacturers |
11 / 20 page 11 RFM68CW RFM68CW Tel: + 86-755-82973805 Fax: + 86-755-82973550 E-mail: sales@hoperf.com http:/ / www.hoperf.com 4.5. Frequency Band Coverage The RFM68CW offers several combinations or frequency references and frequency outputs, allowing for maximum flexibility and design of multi-band products: Table 7 Frequency Selection Table Reference Frequency FXOSC Band Setting DA(13) Upper / Lower Frequency Bounds Fstep Frf & Fdev 22 MHz 310 to 450 MHz 22x10 6 Fstep= -----------------= 1.34277kHz 2 14 24 MHz 312 to 450 MHz 24x10 6 Fstep= -----------------= 1.46484kHz 2 14 0 338 to 450 MHz 26x10 6 Fstep= -----------------= 1.58691kHz 2 14 26 MHz 1 860 to 870 MHz and 902 to 928 MHz 6 Fstep= 2---6----x---1---0----= 3.17383kHz 2 13 Frf= DF(18;0) × Fstep Fdev= DA(12;5) × Fstep 4.6. Power Consumption The following typical power consumption figures are observed on the RFM68CW kits. Note that the transmitter efficiency depends on the impedance matching quality, and can be PCB design dependant. The PA matching may be different in each frequency band. Table 8 Power Consumption in Tx mode Frequency Band Conditions Typical Current Drain 310 to 450 MHz Pout=+10dBm, OOK modulation with 50% duty cycle Pout=+10dBm, FSK modulation Pout=0dBm, FSK modulation 11 mA 15 mA 9 mA 860 to 870 MHz Pout=+10dBm, FSK modulation Pout=0dBm, FSK modulation 16.5 mA 10 mA 902 to 928 MHz Pout=+10dBm, FSK modulation Pout=0dBm, FSK modulation 17.5 mA 10.5 mA |
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