User Manual

18
Mini-RFM - Reference Guide November ’00
4.1 Recommended Operating Conditions
Operating free-air temperature range.......................... 0 to +50 °C
Storage temperature range........................................ -25 to +85 °C
4.2 Electrical Characteristics
at T
amb
=25 °C, VSRL=5.0V (unless otherwise noted)
Note:
Free-air temperature: air temperature immediately surrounding the
Mini-RFM. If the module is incorporated into a housing, it must be
guaranteed by proper design or cooling that the internal temperature
does not exceed the ratings given here.
Parameter Description Condition
Pin No.
of ST1
min. max Unit
VSRL Supply voltage for logic - 10 4.75 5.25 V
VSP
Supply voltage for
transmitter power stage
- 1,2, 3, 4 4.5 6.0 V
VIL
Low level input voltage for
TXCT- and TPC
VSRL=5.0 14, 15 0 1.0 V
VIH
High level input voltage for
TXCT- and TPC
VSRL=5.0 14, 15 4.0 5.0 V
Note:
The voltage difference between GNDL and GNDP must not exceed
0.5 V.
Parameter Description Condition
Pin No.
of ST1
min. nom. max Unit
I_VSRL Supply current for logic and receiver - 10 - - 80 mA
I_VSP
Supply current for transmitter power
stage with antenna Ri-ANT-P02A
VSP=5V
TXCT-=”low”
TPC=”high”
1,2,3,4 0.5 - 1.2 A
I_VSP_L
Leakage current for transmitter power
stage with antenna Ri-ANT-P02A
VSP=5V
TXCT-=”high”
1,2,3,4 - - 50 µA
R_up
Pull-up resistor from TXCT- and TPC
to VRSL
---22-kOhm
I_IL
Low level input current for TCXT- and
TPC
V_IL=0V 14, 15 -180 - -300 µA
I_IH
High level input current for TCXT-
and TPC
V_IL=4V 14, 15 -30 - -60 µA