AMY-6M - Hardware Integration Manual
UBX-17021971 – R07
Design-in
Page 8 of 57
2
Design-in
In order to obtain good performance with a GPS receiver module, there are a number of points that require
careful attention during the design-in. These include:
Power Supply
Good performance requires a clean and stable power supply.
Interfaces
Ensure correct wiring, rate and message setup on the module and your host system.
Antenna interface
For optimal performance seek short routing, matched impedance and no stubs.
With AMY-6M an additional external LNA is mandatory if no active antenna is used.
2.1
Power management
2.1.1
Overview
The power supply circuitry can be adapted to various concepts, depending on the intended application.
Figure 2 gives an overview of the power supply features.
Figure 2: Power supply diagram
2.1.1.1
Main supply voltage
During operation the base-band supply current is supplied through the V_DCDC pin. The built-in LDO generates
the stabilized core voltage VDD_C from V_DCDC. The current at V_DCDC depends heavily on the current system
state and is in general very dynamic.
Use a low-impedance supply (<< 1 Ohm) at the V_DCDC pin.
