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CC2500-RTY1 データシート(PDF) 9 Page - Texas Instruments |
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CC2500-RTY1 データシート(HTML) 9 Page - Texas Instruments |
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9 / 99 page  CC2500 SWRS040C Page 9 of 89 4.2 RF Receive Section Tc = 25 C, VDD = 3.0 V if nothing else stated. All measurement results obtained using the CC2500EM reference design ([4]). Parameter Min Typ Max Unit Condition/Note Digital channel filter bandwidth 58 812 kHz User programmable. The bandwidth limits are proportional to crystal frequency (given values assume a 26.0 MHz crystal). 2.4 kBaud data rate, sensitivity optimized, MDMCFG2.DEM_DCFILT_OFF=0 (2-FSK, 1% packet error rate, 20 bytes packet length, 203 kHz digital channel filter bandwidth) Receiver sensitivity –104 dBm The RX current consumption can be reduced by approximately 1.7 mA by setting MDMCFG2.DEM_DCFILT_OFF =1. The typical sensitivity is then -102 dBm and the temperature range is from 0 oC to +85 oC. The sensitivity can be improved to typically –106 dBm with MDMCFG2.DEM_DCFILT_OFF=0 by programming registers TEST2 and TEST1 (see page 82). The temperature range is then from 0 oC to +85oC. Saturation –13 dBm Adjacent channel rejection 23 dB Desired channel 3 dB above the sensitivity limit. 250 kHz channel spacing Alternate channel rejection 31 dB Desired channel 3 dB above the sensitivity limit. 250 kHz channel spacing See Figure 22 for plot of selectivity versus frequency offset Blocking ±10 MHz offset ±20 MHz offset ±50 MHz offset 64 70 71 dBm dBm dBm Wanted signal 3 dB above sensitivity level. Compliant with ETSI EN 300 440 class 2 receiver requirements. 10 kBaud data rate, sensitivity optimized, MDMCFG2.DEM_DCFILT_OFF=0 (2-FSK, 1% packet error rate, 20 bytes packet length, 232 kHz digital channel filter bandwidth) Receiver sensitivity –99 dBm The RX current consumption can be reduced by approximately 1.7 mA by setting MDMCFG2.DEM_DCFILT_OFF =1. The typical sensitivity is then -97 dBm The sensitivity can be improved to typically –101 dBm with MDMCFG2.DEM_DCFILT_OFF=0 by programming registers TEST2 and TEST1 (see page 82). The temperature range is then from 0 oC to +85oC. Saturation –9 dBm Adjacent channel rejection 18 dB Desired channel 3 dB above the sensitivity limit. 250 kHz channel spacing Alternate channel rejection 25 dB Desired channel 3 dB above the sensitivity limit. 250 kHz channel spacing See Figure 23 for plot of selectivity versus frequency offset Blocking ±10 MHz offset ±20 MHz offset ±50 MHz offset 59 65 66 dB dB dB Wanted signal 3 dB above sensitivity level. Compliant with ETSI EN 300 440 class 2 receiver requirements. |
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