SIM8300G-M2 Hardware Design V1.01 Draft

SIM8300G-M2 Hardware Design V1.01
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Audio layout guidelines:
Analog input
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0.2mm trace widths; 0.2mm spacing between other signals trace.
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Pseudo differential route for MIC.
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Isolate from noise sources, such as antenna, RF signals, SMPS, clocks, and other high speed signals.
Analog output

Isolate from noise sources such as antenna, RF signals, SMPS, clocks, and other high speed signals.

Speaker output signal – route as differential pair with 0.5mm trace widths.
Audio power and GND

Recommend add magnetic bead on AVDD net reserved for debug.

VDD cannot directly use VBAT as the power supply.
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AGND need add GND via to the main GND plane directly.