The MAX9812 is a single / dual input, 20dB fixed gain microphone amplifier. They feature built-in low-noise microphone biasing for portable audio devices such as laptops, cell phones, and handheld computers. These amplifiers have a gain-bandwidth product of 500kHz and deliver output swing-to-rail with industry-leading 100dB power-supply rejection and extremely low THD + N (0.015%). Also has a series of power-saving features: only 230μA supply current, the overall shutdown mode can supply current and bias current total to 100nA.
5 x Electret Microphone Amplifier Development Board Sensor Module