u-blox UBX-G7020, Hardware Integration Manual

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UBX-G7020 - Hardware Integration Manual
Component Selection
GPS.G7-HW-10003 Objective Specification Page 55 of 74
3.17 Standard resistors
Name Use Figure Type / Value
R1 USB data serial termination Figure 21 27R 5% 0.1W
R2 USB data serial termination Figure 21 27R 5% 0.1W
R8 Pull-down at VDD_USB Figure 21 1K 5% 0.1W
R3 Pull-up at antenna supervisor transistor Figure 7
Figure 8 100K 5% 0.1W
R4 Antenna supervisor current limiter Figure 7
Figure 8 10R 5% 0.25W
R5 Antenna supervisor voltage divider Figure 8 560R 5% 0.1W
R6 Antenna supervisor voltage divider Figure 8 100K 5% 0.1W
R7 Pull-down at LNA enable Figure 18 10K 5% 0.1W
Table 35: Standard resistors
3.18 Ferrite beads (FB1)
Manufacturer Order No. Comments
MuRata BLM15HD102SN1 High impedance @ 1.575 GHz
MuRata BLM15HD182SN1 High impedance @ 1.575 GHz
Table 36: Recommend parts list for ferrite beads FB1
3.19 Feed-thru capacitors
Manufacturer Order No. Comments
MuRata NFL18SP157X1A3 For data signals, 34 pF load capacitance
MuRata NFA18SL307V1A45 For data signals, 4 circuits in 1 package
MuRata NFM18PC474R0J3 For power supply < 2 A, size 0603
MuRata NFM21PC474R1C3 For power supply < 4 A, size 0805
Table 37: Recommend parts list for feed thru capacitors
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