Why does ESP32-LyraT-Mini V1.2 use an external ADC for the microphone when ADC is already available in Audio Codec?

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El3ctroniks
Posts: 2
Joined: Wed Jul 19, 2023 5:23 pm

Why does ESP32-LyraT-Mini V1.2 use an external ADC for the microphone when ADC is already available in Audio Codec?

Postby El3ctroniks » Mon Feb 12, 2024 4:08 pm

Kindly refer to ES8311 audio codec datasheet and ESP32-LyraT-Mini V1.2 hardware reference. In the Lyra, an external ADC ES7243 is used to sample the audio signal from the microphone but an equally capable ADC is avaiable in the ES8311 codec ic, why does Espressif use the external ADC?
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lyra t mini board system block diagram
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markevens
Posts: 38
Joined: Sat Aug 01, 2020 6:31 am

Re: Why does ESP32-LyraT-Mini V1.2 use an external ADC for the microphone when ADC is already available in Audio Codec?

Postby markevens » Sun Mar 03, 2024 3:14 am

Same confusion I am also facing. Is anyone know?
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