R
EM4100
Electrical Characteristics
VDD = 1.5V, VSS = 0V, fC1 = 134kHz square wave, Ta = 25°C
VC1 = 1.0V with positive peak at VDD and negative peak at VDD -1V unless otherwise specified
Parameter
Supply Voltage
Symbol Test Conditions
Min.
1.5
Typ.
Max.
1)
Units
V
VDD
Rectified Supply Voltage
Coil1 - Coil2 Capacitance
VDDREC
Cres
V
COIL1 - VCOIL2 = 2.8 VDC
1.5
V
Modulator switch = “ON”
Vcoil=100mVRMS f=10kHz
74 2)
120
pF
pF
Power Supply Capacitor
Biphase & Manchester
Versions
Csup
IDD
0.63
1.5
µA
Supply Current
VONC2
V
DD=1.5V IVDDC2=100µA with ref. to VDD
0.9
2.1
1.1
2.3
1.3
2.8
V
V
C2 pad Modulator ON
voltage drop
VDD=5.0V IVDDC2=1mA with ref. to VDD
VONC1
VDD=5.0V IVDDC1=1mA with ref. to VDD
2.1
2.3
2.8
V
C1 pad Modulator ON
voltage drop
PSK Version
Supply Current PSK
IDDPSK
0.92
0.6
2
µA
V
VONC2PSK
VDD=1.5V IVDDC2=100µA with ref. to VDD
0.3
0.9
C2 pad Modulator ON
voltage drop
Note 1) The maximum voltage is defined by forcing 10mA on COIL1 - COIL2
Note 2) The tolerance of the resonant capacitor is ± 15% over the whole production.
Optional reduced tolerance on request
On a wafer basis, the tolerance is ± 2%
Timing Characteristics
VDD = 1.5V, VSS = 0V, fcoil = 134kHz square wave, Ta = 25°C
VC1 = 1.0V with positive peak at VDD and negative peak at VDD -1V unless otherwise specified
Timings are derived from the field frequency and are specified as a number of RF periods.
Parameter
Symbol
Test Conditions
Value
64, 32, 16
Units
RF periods
Read Bit Period
Trdb
depending on option
Timing Waveforms
TOC
64, 32 or 16 TOC, depending on option
COIL1
BIT n
BIT n+1
BIT n+2
Serial Data Out
Fig. 4
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3
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