DSB45 Development Support Box
Confidential / Released
s
DSB45_HD_V05
Page 38 of 50
01.02.2008
6
Technical data of DSB45 Development Support Box
The technical data listed below apply to the default settings of the DSB45 switches.
Table 22: DSB45 maximum ratings
Parameters
Condition
Min.
Max.
Unit
Supply voltage
Laboratory PSU
-0.5
+25
V
Operating temperature
+15
+35
°C
Storage temperature
-40
+85
°C
Table 23: DSB45 technical data
Parameters
Condition
Min.
Typical
Max.
Unit
Supply current peak
1
A
Supply current
average
800
mA
Supply voltage
Laboratory PSU
requirements during
GSM transmission
8.5 9 9.5 V
Nominal supply voltage
for the GSM module
(adjustable)
1.25 4.1
(default)
4.2 V
Minimum supply
voltage for the GSM
module
(adjustable)
1.25 3.5
(default)
4.2 V
V
BATT+
output voltage
Maximum supply
voltage for the GSM
module
4.45 4.5 4.55 V
VL
switched logic high
level voltage (on if
GSM module on)
3.17 3.25 3.3 V
3V3
Supply voltage of
DSB45 circuits
3.17 3.25 3.3 V
+5V
Audio interface supply
voltage
Audio interface supply
voltage
4.75 5.0 5.25 V
Output voltage range
(load resistance
3 k
Ω
)
±
4.0
±
5.0
V
Output short-circuit
current
±
30
±
60
mA
RS-232 interfaces
Input
resistance
3 5 7 k
Ω
RF attenuation
Adapter between RF
connector X505 (type
Hirose U.FL-R-SMT)
and RF connector X506
0.1 0.2 dB
