What is the maximum ADC sampling frequency we can have on ESP32

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regandgo
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Joined: Sun Jun 18, 2017 7:54 am

What is the maximum ADC sampling frequency we can have on ESP32

Postby regandgo » Mon Jun 26, 2017 10:11 am

Hi there,
I have made some tests on my ESP32-DevKitC board. (VCC 3.3V)
The setting I used was: ADC1 channel 0; ADC_WIDTH_12Bit, ADC_ATTEN_11db.
Non stop reading of 1024 samples in a loop takes 22 ms.
So, the max sampling frequency is 46kHz.

But, in my project I need, at least, 100kHz.
Does anyone have an idea how to increase the sampling frequency?

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