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DS2722-F-04 Datasheet(PDF) 5 Page - Micro Linear Corporation |
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DS2722-F-04 Datasheet(HTML) 5 Page - Micro Linear Corporation |
5 / 28 page ML2722 DS2722-F-05 FINAL DATASHEET DECEMBER 2003 5 RECEIVER ZIN Receiver RF impedance fc=915 MHz 17-j50 Ω NF Receiver RF noise figure fc=915 MHz 9 dB DRRX Data Rate FSK modulation, fdev=+/-460KHz 1.536 Mbps S Input Sensitivity For better than 12.5% CER -95 dBm BWRX Bandwidth 3dB nominal 770 kHz PIMAX Maximum RX RF input <12.5% CER at 1.536Mchip/s 8 dBm IIP3 Receiver input IP3 Test tones 2 and 4 channels away -12 dBm LO Leakage at RXI -80 dBm IRR Receive RF mixer image rejection Measured at 3.5MHz offset 35 dB Adjacent channel rejection -80dBm wanted signal <12.5% CER (a single interferer with 2GFSK modulation to give a -20dBc bandwidth of 1.5MHz) 1 channel 2 channels 3 or more channels 15 40 45 dB Receiver settling time RXON high to valid data 120 µs IF FILTERS fIFC IF filter center frequency After Automatic Filter Alignment 1.024 MHz BWIF IF filter 3dB bandwidth After Automatic Filter Alignment 1405 kHz LIMITER, AGC, AND FM DEMODULATOR tOVLD Recovery from overload From 0dBm at input 5 12 µs Eb/No For 12.5% CER 3 dB Co-Channel rejection, 12.5% CER -80 dBm, modulated with 1.536Mbps GFSK, BT=0.5, PRBS data 4 dB AM tolerance for 12.5% or better CER -80 dBm wanted signal, AM modulation depth at 100 KHz rate 90 % RSSI PERFORMANCE tRRSSI RSSI rise time: < -100dBm to -15dBm into the IF mixer 20 pF load, 20% to 80% 1 5.3 10 µs tFRSSI RSSI fall time: <-15dBm to <-100dBm into the IF mixer 20 pF load, 20% to 80% 1 4.4 10 µs VRSMX RSSI maximum voltage -15dBm in 2.2 2.8 V VRSMN RSSI minimum voltage No signal 0.05 V GRSMID RSSI sensitivity, mid range 28 35 42 mV/dB PRSMX RSSI maximum signal Sensitivity is >50% mid range -20 dBm PRSMN RSSI minimum signal Sensitivity is >50% mid range -95 dBm RSSI accuracy Measured at -40dBm input power 1.5 1.9 2.1 V |
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