MEMS microphones are constructed with multiple semiconductor die in a single package. Analog MEMS microphones will include an audio MEMS transducer connected to an audio preamplifier. The output of the audio preamplifier is made available for the user, meaning that analog MEMS microphones do not require any digital circuits in the application system. This makes the application circuits for MEMS microphones easy to design, but the analog output signal can be sensitive to external electrical noise. Analog MEMS microphones are available in 2-pin configurations for compatibility with electret microphone applications. However, the most common applications for MEMS microphones with analog outputs use 3-pin configurations with separate circuits for power and the output signal.