HID iCLASS SE - 45 7.4.7 Power Considerations; 6500-101-03 Prox Antenna; Figure 17: 6500-101-03 Prox Antenna; Table 30: Power Considerations

iCLASS SE Reader Module Hardware Developer’s Guide, SE3200-902, Rev. C.1
February 2014 Page 46 of 52
7.4.7 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 30: Power Considerations
Mode
Parameter
Min
Typ
Max
Unit
iCLASS card in 10mm
distance
Average DC current at
20°C
155 mA
iCLASS card in 50mm
distance
148 mA
iCLASS card in 70mm
distance
145 mA
Note: The measurements were taken with constant carrier on.
7.5 6500-101-03 Prox Antenna
The iCLASS SE Reader Module is optimized for operation with this Prox antenna. No
external components are required.
Figure 17: 6500-101-03 Prox Antenna