User's Manual

Electrical Characteristics
13.5 Antenna Electrical and Timing Characteristics
Parameters Conditions Min. Typ. Max. Unit Comments
ANT output power 4 W
ANT output impedance (50, 0)
(Ω, °)
At 13.56 MHz
RFOn time to RFOff
End of reception on RX
to ANT.
RF field turns on
1.3 1.4 ms
RFOff time to RFOn
End of reception on RX
to ANT.
RF field turns off
4.2 50 µs
Figure 20 : Output Power vs. Temperature
(V
CC
Pin at 5 V – RF On - No I/O Connected)
0
50
100
150
200
250
300
-10 0 10 20 30 40 50 60
Temperature (°C)
Output Power (mW)
Figure 21: Antenna RF Switch Time
RX_RS232
ANT
Output
ANT
Output
t
RFon
t
RFoff
April 2003 Revision 3.1b 41/45