Smart LTE Module Series
Smart EVB G2 User Guide
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4.7.4. Microphone Interfaces
Smart EVB G2 provides one single-ended and one differential microphone inputs for microphone
interfaces. The single-ended microphone input is for MEMS-Type microphone and the differential
microphone input is for ECM-Type microphone. The following figures show a reference circuit design for
microphone interfaces and the two microphones.
Figure 31: Reference Design for Microphone Interfaces
Figure 32: MEMS-Type and ECM-Type Microphones
MEMS-Type
ECM-Type