Vbak
A
B
Vbak
GND
Vbak
GND
S
uper
cap
B
atte
ry
C6
+
+
Back-up supply options
(A)
Supercap, charged through GPS module
(B)
Primary cell, decoupled with diode
NSR0310
Tx
Rx
3.3V
GND
Shown from top without lid; pads shown for better understanding
A1035-H
GSC3f/LPx
serial
Vbak
A
B
Vbak
GND
Vbak
GND
S
uper
cap
B
atte
ry
C6
+
+
Back-up supply options
(A)
Supercap, charged through GPS module
(B)
Primary cell, decoupled with diode
NSR0310
Tx
Rx
3.3V
GND
Shown from top without lid; pads shown for better understanding
A1035-H
GSC3f/LPx
serial
Figure 6: Minimum configuration A1035-H with Vbak
Remarks:
•
Use separate ground plane for antenna ground.
•
External antenna input impedance is 50
Ω
. Match as close as possible.
•
Maximum allowed external antenna current is 50 mA. Consider a current lim-
iter.
•
A battery back-up circuit for the RTC (Real Time Clock) should be consid-
ered (see chapter: “
10.6 Battery Back-up”)
•
Send shutdown command along with a further delay (2s) before switching
Vcc off
V1.5 – Dec-09
User’s Manual
Page 12 of 37
