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RECOMMANDED REFLOW PROFILE
The reflow profile shown above should not be exceeded, since excessive temperatures or transport times during
reflow can damage the module. Cooling temperature fall rate: max 3°C / sec
ANTENNA CONSIDERATIONS
The PX1175RDP is designed to be used with GPS/QZSS L1/L5, Beidou B1I/B2a, Galileo E1/E5a, NavIC L5
multi-frequency active antenna. Antenna with gain up to 40dB and noise figure less than 2dB can be used. It is
important to select a high-performance antenna to achieve optimal RTK performance.
POWER SUPPLY REQUIREMENT
PX1175RDP requires a stable power supply, avoid ripple on VCC pin (<50mVpp). Power supply noise can affect the
receiver’s sensitivity. Bypass capacitors should be placed close to the module VCC pin, with values adjusted depending
on the amount and type of noise present on the supply line.
BACKUP SUPPLY
The purpose of backup supply voltage pin (V_BCKP) is to keep the SRAM memory and the RTC powered when the
module is powered down. This enables the module to have a faster time-to-first-fix when the module is powered on
again. DR calibration data is also kept in this SRAM. If V_BCKP is not maintained when main power is removed, the
receiver will need to go through auto calibration process before DR could take effect every time it’s powered on. The
backup current drain is less than 35μA. In normal powered on state, the internal processor access the SRAM and
current drain is higher in active mode
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