EM4095 查看數據表（PDF） - EM Microelectronic - MARIN SA
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EM4095 Datasheet PDF : 10 Pages
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EM4095
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
50
µs
modulation index: 100%
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
VSS
SHD
AGND
FCAP
MOD
to all blocks
to all blocks
to all blocks
BIAS &
AGND
BIAS & AGND
to all blocks
LOCK
LOOP
FILTER
VCO &
SEQUENCER
SYNCHRO
HOLD
SHORT
DETECTION
& READY
ANTENNA
DRIVERS
RDY/CLK
DVDD
ANT1
ANT2
DVSS
DMOD_IN
SAMPLER
FILTER
COMPARATOR
DMOD_OUT
CDEC_OUT CDEC_IN DC2
Fig. 5
Copyright 2002, EM Microelectronic-Marin SA
5
www.emmicroelectronic.com
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