AMY-5M - Hardware Integration Manual
GPS.G5-MS5-08207-A3
Preliminary
Design-in
Page 15 of 54
2.1.8
Separate supplies of 3.0 V (2.5…3.6 0V) and 1.4 V (1.4…3.6 V)
The dual 3.0V and 1.4V power supply the most efficient configuration to run u-blox 5 receivers (see section
2.1.3 for details). It assures a better stability than a single 3.0V power supply as the sensitive RF supply is well
separated from the fluctuating base band power supply.
AMY-5
VDD_IO
VDD_IO 1.65...3.6 V
XTAL_IN
XTAL_OUT
V_DCDC
1.4...3.6 V
1.4V Supply
1.4...3.6 V
Backup Battery
V_BCKP
VDD_ANA
VDD_LNA
VDD_C
V_TH
Crystal
C20
f
XTAL
= 32.768 kHz
Y2
C19
VDD_3V
2.5...3.6 V
3.0V Supply
VDD_RF
VDD_B
(optional)
V_RESET
Connect
XTAL_IN
to GND
if no RTC used
Connect
to GND
Figure 7: Dual supplies of 3.0 V and 1.4 V
2.1.9
Power modes
The u-blox 5 features 2 continuous operating modes (Maximum Performance and Eco). Eco mode optimizes the
use of the acquisition engine to deliver lower current consumption and shall be used with AMY-5M. Maximum
Performance mode is not supported with AMY-5M.
For more information, see the
u-blox 5 Receiver Description including Protocol Specification
