I am designing my own pcb board based on a Sodaq One V3 (I built my prototype with a Sodaq One V3 and a MAX30102) and I am currently integrating both devices in KiCAD but I have a doubt with the GPS components. The official page says the GPS is an uBlox EVA M8M and I already have the symbol and footprint, but I have doubt with the 1575.42 Mhz SAW filter U3 Component (could I use this one? B39162B9416K610), the schematic GPS circuit schematic is: GPS Circuit

And the other doubt is about U4 component, I have no idea what that component is, I also tried to see other Sodaq boards schematics but no success since other boards do not have GPS module. Could somebody help me please? U4 Component of gps circuit


1 Answer 1


The EVA-8M Hardware Integration Guide makes the following suggestions for the SAW filter:

Manufacturer Order no. System supported Comments
TDK/ EPCOS B8401: B39162B8401P810 GPS+GLONASS High attenuation
TDK/ EPCOS B3913: B39162B3913U410 GPS+GLONASS+BeiDou For automotive application
TDK/ EPCOS B9416: B39162B9416K610 GPS High input power
TDK/ EPCOS B4310: B39162B4310P810 GPS+GLONASS Compliant to the AEC-Q200 standard
TDK/ EPCOS B4327: B39162B4327P810 GPS+GLONASS+BeiDou Low insertion loss
TDK/ EPCOS B9482: B39162B9482P810 GPS+GLONASS Low insertion loss
Murata SAFFB1G56KB0F0A GPS+GLONASS+BeiDou Low insertion loss, only for mobile application
Murata SAFEA1G58KA0F00 GPS+GLONASS Only for mobile application
Murata SAFFB1G58KA0F0A GPS+GLONASS Only for mobile application
Triquint 856561 GPS Compliant to the AEC-Q200 standard
TAI-SAW TA1573A GPS+GLONASS Low insertion loss
TAI-SAW TA1343A GPS+GLONASS+BeiDou Low insertion loss

The hardware integration guide also has a lot of other good-to-read information both regarding the SAW filter and everything else.

Regarding U4, it's probably a high side load switch of some model. Only needed if you need to turn the GPS receiver on and off.

  • \$\begingroup\$ thank you so much, I will read more about what you shared!!! \$\endgroup\$
    – imt_blake
    Nov 4, 2022 at 15:02

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