u-blox SARA-G3 Series System Integration Manual page 142

Reference Description
L1, L2 82 nH Multilayer inductor 0402
(self resonance frequency ~1 GHz)
MIC 2.2 kΩ Electret Microphone
R1, R2, R3, R4 2.2 kΩ Resistor 0402 5% 0.1 W
SPK 16 Ω Speaker
Table 33: Example of components for analog audio interface headset and handset mode application circuit
If the analog audio interface is not used, the analog audio pins (MIC_BIAS, MIC_GND, MIC_P,
MIC_N, SPK_P, SPK_N) can be left unconnected on the application board.
UBX-13000995 - R06
SARA-G3 series - System Integration Manual
Part Number – Manufacturer
LQG15HS82NJ02 – Murata
Various Manufacturers
RC0402JR-072K2L – Yageo Phycomp
Various Manufacturers
Objective Specification Design-in
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