HID iCLASS SE - Power Considerations; Table 22: Felica Waveforms; Table 23: Power Considerations

iCLASS SE Reader Module Hardware Developer’s Guide, SE3200-902, Rev. C.1
Page 39 of 52 February 2014
Table 22: FeliCa Waveforms
Tr
Rise Time
730ns
Tf
Fall Time
610ns
Modulation
Index
12.50%
Overshoot 0.2 %
Undershoot 0.1%
7.3.6 Power Considerations
If a transponder is presented to the 4090A10 HF antenna, the impedance of the
antenna is bound to change. The magnitude of the impedance change depends on
various factors like
Geometrical relationship between the antennas (coupling)
Impedance/power consumption of transponder
…
This leads to a change in power consumption of the reader. The following table
provides an overview on power consumptions recorded with different transponders.
Table 23: Power Considerations
Mode
Parameter
Min
Typ
Max
Unit
iCLASS card in 10mm
distance
Average VDC current at
20°C
140 mA
iCLASS card in 50mm
distance
78 mA
iCLASS card in 70mm
distance
75 mA
Note: The measurements were taken with constant carrier enabled.