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EM4095 Datasheet(PDF) 5 Page - EM Microelectronic - MARIN SA |
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EM4095 Datasheet(HTML) 5 Page - EM Microelectronic - MARIN SA |
5 / 10 page EM4095 Copyright 2002, EM Microelectronic-Marin SA 5 www.emmicroelectronic.com Timing Characteristics: Parameters specified below are valid only in case the device is used according to Operating Conditions defined on previous page. VSS=DVSS=0V, VDD=DVDD = 5V Parameter Symbol Test Conditions Typ Max Units Set-up time after a sleep period Tset 25 35 ms Time from full power to modulation state Tmdon antenna circuit specifications: Q=15,FRES=125Khz modulation index: 100% 50 µs AM demodulation: Delay time from input to output Tpd Modulating signal 2Khz square wave 10mVpp 40 100 µs Recovery time of reception after antenna modulation Trec Note 1 400 500 µs Note 1: RF period is time of one period transmitted on ANT outputs (at 125 kHz 8µs). Trec after antenna modulation receiver chain is ready to demodulate. The condition is of course that the amplitude on antenna has already reached its steady state by that time (this depends on Q of antenna). See also Application Notes. Block Diagram VDD SHD AGND VSS to all blocks LOOP FILTER VCO & SEQUENCER BIAS & AGND SHORT DETECTION & READY BIAS & AGND to all blocks ANTENNA DRIVERS SYNCHRO SAMPLER FILTER COMPARATOR to all blocks to all blocks CDEC_OUT CDEC_IN DC2 FCAP MOD DMOD_IN RDY/CLK DVDD ANT1 ANT2 DVSS DMOD_OUT HOLD LOCK Fig. 5 |
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