Tiny low power mic amps

When it comes to low-noise and low power microphone amplifiers Maxim is probably going to be on top of your list. The MAX9812 and MAX9813 amplifiers come in tiny packages and feature a 230uA supply current and only 100nA in shutdown mode. These amplifiers are great for compact applications such as cell phones. The specs include a 500kHz bandwidth, Rail-to-Rail® outputs, 100dB power-supply rejection ratio, a very low 0.015% THD + N, and a 20dB fixed-gain configuration that eliminates the need for external gain-setting components. They are available in a 2.7V to 3.6V range for PDA and cell phone applications and a 4.5V to 5.5V range for notebook and PC applications.



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