● Very Low Noise: 30nV/Hz at 1kHz, Gain = 20dB

● Very Low THD+N: 0.009%, Gain = 20dB

● Wide Supply Voltage Range:

   3.3V to 5.5V (SGM4822/SGM4823)

● Low Quiescent Current:

   100nA at Forced Shutdown Mode

   5μA at Monitor Mode (SGM4822/SGM4823)

   0.66mA at Active Mode

● Low-Noise Microphone Bias Voltage: 2.3V

● Rail-to-Rail Outputs

● 20dB Fixed-Gain

● Automatic Switching Between Low Power Monitor Mode and 

   Low Noise Active Mode (SGM4822/SGM4823)

● Latched Push-Pull Output to Wake up External MCU in 

   Sleeping Mode (SGM4822/SGM4823)

● -40℃ to +85℃ Operating Temperature Range

The SGM4822/SGM4825 (single-input) and SGM4823/ SGM4826 (dual-input) are low noise, low power, fixed- gain microphone amplifiers. They offer tiny packaging and a low noise, integrated microphone bias, making them ideal for portable audio applications such as notebook computers, smart phones, and digital cameras. These amplifiers feature a 2.6MHz bandwidth, rail-to-rail outputs, an industry-leading and a very low 0.009% THD+N in active mode, forced shutdown mode that cuts the combined supply and bias currents to only 100nA. The SGM4822/SGM4823 power-saving features include automatic switching between low power monitor mode and low noise active mode, and also provide latched push-pull output to wake up external MCU in sleeping mode.

The SGM4823 and SGM4826 have two inputs allowing two microphones to be multiplexed to a single output.