Single-Chip Low Cost Low Power RF-Transceiver (Rev. A)

CC2500Current consumption,TX states11.1 mA Transmit mode, –12 dBm output power15.1 mA Transmit mode, -6 dBm output power21.2 mA Transmit mode, 0 dBm output powerTable 4: Current consumption4.2 RF Receive SectionTc = 25°C, VDD = 3.0 V if nothing else stated. All measurement results obtained using the CC2500EM reference design.Parameter Min Typ Max Unit Condition/NoteDigital channel filterbandwidth58 812 kHz User programmable. The bandwidth limits are proportionalto crystal frequency (given values assume a 26.0 MHzcrystal).2.4 kbps data rate, current optimized, MDMCFG2.DEM_DCFILT_OFF = 1(FSK, 1% packet error rate, 20 bytes packet length, 203 kHz digital channel filter bandwidth)Receiver sensitivity –104 dBm The sensitivity can be improved to typically –106 dBm bysetting MDMCFG2.DEM_DCFILT_OFF = 0 . The typicalcurrent consumption is in this case 17.0 mA at sensitivityllimit.Saturation –13 dBmAdjacent channelrejectionAlternate channelrejection23 dB Desired channel 3 dB above the sensitivity limit. 250 kHzchannel spacing31 dB Desired channel 3 dB above the sensitivity limit. 250 kHzchannel spacingSee Figure 22 for plot of selectivity versus frequency offset10 kbps data rate, current optimized, MDMCFG2.DEM_DCFILT_OFF = 1(FSK, 1% packet error rate, 20 bytes packet length, 232 kHz digital channel filter bandwidth)Receiver sensitivity –99 dBm The sensitivity can be improved to typically –101 dBm bysetting MDMCFG2.DEM_DCFILT_OFF = 0 . The typicalcurrent consumption is in this case 17.3 mA at sensitivityllimit.Saturation –9 dBmAdjacent channelrejectionAlternate channelrejection18 dB Desired channel 3 dB above the sensitivity limit. 250 kHzchannel spacing25 dB Desired channel 3 dB above the sensitivity limit. 250 kHzchannel spacingSee Figure 23 for plot of selectivity versus frequency offset250 kbps data rate, MDMCFG2.DEM_DCFILT_OFF = 0(MSK, 1% packet error rate, 20 bytes packet length, 540 kHz digital channel filter bandwidth)Receiver sensitivity –89 dBmSaturation –13 dBmAdjacent channelrejectionAlternate channelrejection21 dB Desired channel 3 dB above the sensitivity limit. 750 kHzchannel spacing30 dB Desired channel 3 dB above the sensitivity limit. 750 kHzchannel spacingSee Figure 24 for plot of selectivity versus frequency offsetPRELIMINARY Data Sheet (Rev.1.2) SWRS040A Page 8 of 83