User's Manual

21
May ’00 Chapter 3. Specifications
3.1 Recommended Operating Conditions
Operating free-air temperature range T_oper -25 to +70 ºC
Storage temperature range T_store -40 to +85 ºC
*1 Typical supply current (peak value) for the power stage when the RF transmitter
is switched on (L = 47
µ
H, Q = 12).
*2 Typical supply current for logic when the RF transmitter is switched on.
*3 Typical supply current (average value) of the Micro-reader when the RF transmit-
ter is switched on (L = 47
µ
H, Q = 12).
Note:
Free-air temperature: air temperature immediately surrounding the
Module. If the module is incorporated into a housing, it must be guar-
anteed by proper design or cooling that the internal temperature does
not exceed the absolute maximum ratings.
Symbol Parameter Min. Typ. Max. Unit
V_VSP Supply voltage for power stage 4.5 5.0 5.5 V
V_VSL Supply voltage for logic 4.5 5.0 5.5 V
I_VSP Supply current for power stage -
10
*1
-mA
I_VSL Supply current for logic -
30
*2
-mA
I_su Output current sunk by an output pin - 5.0 15.0 mA
I_so Output current sourced by an output pin - 5.0 15.0 mA
I_sutot Output current sunk by all output pins - 20.0 60.0 mA
I_sotot
I_sototOutput current sourced by all
output pins
-20.060.0mA
V_ret
VSP start voltage to guarantee power
on reset
--GND-
Vrise_ret
VSP rise rate to guarantee power on
reset
0.1 - - V/ms
I_idle Supply current with Micro-reader idle - 5.0 - mA
I_act Supply current with Micro-reader active -
100
*3
-mA
ViH Input high voltage 0.8 VSL - VSL -
ViL Input low voltage GND - 0.2 VSL -
VoH Output high voltage VSL - 0.7 VSL
VoL Output low voltage GND 0.6 V
Q_Ant Antenna quality factor 10 15 20
L_Ant Antenna inductance value 46.1 47.0 47.9
µ
H