EM4095
Timing Characteristics:
Parameters specified below are valid only in case the device is used according to Operating Conditions defined on previous
page.
V
SS
=D
VSS
=0V, V
DD
=D
VDD
= 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
Tmdon
antenna circuit specifications:
50
µs
Q=15,FRES=125Khz
state
modulation index: 100%
AM demodulation: Delay time from
Tpd
Modulating signal 2Khz square
40
100
µs
input to output
wave 10mVpp
Recovery time of reception after
Trec
Note 1
400
500
µs
antenna modulation
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
to all blocks
to all blocks
to all blocks
BIAS &
AGND
BIAS & AGND
to all blocks
SHORT
DETECTION
& READY
RDY/CLK
LOCK
LOOP
FILTER
HOLD
VCO &
SEQUENCER
ANTENNA
DRIVERS
DVDD
ANT1
ANT2
DVSS
MOD
SYNCHRO
DMOD_IN
SAMPLER
FILTER
COMPARATOR
DMOD_OUT
CDEC_OUT
CDEC_IN
DC2
Fig. 5
Copyright
2002, EM Microelectronic-Marin SA
5
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EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
