Microphone Interface Reference Circuit - Quectel SC200L-EM Hardware Design

maximum output current is 2mA.
 The earpiece interface uses differential output.
The loudspeaker interface uses the differential output as well. The output channel is available with a

Class-D amplifier whose output power is 0.8W when load is 8Ω.
 The headphone interface features stereo left and right channel output, and headphone insert
detection function is supported.

3.20.1 Microphone interface reference circuit

SC200L_Hardware_Design
Figure 21: Main microphone reference circuit
Figure 22: Auxiliary microphone reference circuit
SC200L Hardware Design
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