Single input amplifier with automatic gain 40dB, 50dB or 60dB. Compact size, built-in low noise electret microphone, suitable for portable audio devices such as cell phones, computers etc. The amplifier has a bandwidth of 20Hz-20kHz. Low input noise density of 30 nV. Technical data Supply voltage: 2.7v-5.5v Current: 3mA Output: 2Vpp at 1.25V deviation Frequency response: 20Hz-20kHz Programmable attack and slowdown ratio Automatic gain: 40dB, 50dB, 60dB Input noise density: 30nV Low THD: 0.04% (typ) PCB dimensions: 25 x 14 mm Weight: 3g https://elecena.pl/product/22621275/cma-4544pf-w-max9814-microphone-amplifier-module-with-electret-microphone 2023-02-23 https://elecena.pl/product/22621275/cma-4544pf-w-max9814-microphone-amplifier-module-with-electret-microphone 2023-06-13 https://elecena.pl/product/22621275/cma-4544pf-w-max9814-microphone-amplifier-module-with-electret-microphone 2025-06-09 https://elecena.pl/product/22621275/cma-4544pf-w-max9814-microphone-amplifier-module-with-electret-microphone 2025-10-25 https://elecena.pl/product/22621275/cma-4544pf-w-max9814-microphone-amplifier-module-with-electret-microphone 2025-10-29