Maybe related to:
https://esp32.com/viewtopic.php?f=13&t=44004
ADC max sample rate = 200kHz (suggested by ESP32 datasheet)
If you read more than one ADC input in sequence, the sample rate for each ADC input = 200kHz/number of inputs.
Search found 3 matches
- Tue Jan 21, 2025 10:28 am
- Forum: ESP-IDF
- Topic: esp32s3 ADC sampling rate
- Replies: 4
- Views: 15755
- Mon Jan 20, 2025 2:09 pm
- Forum: ESP-IDF
- Topic: ESP32-S3 Fast readings with ADC and DMA low level functions
- Replies: 1
- Views: 423
Re: ESP32-S3 Fast readings with ADC and DMA low level functions
Looking further into the datasheet: esp32-s3_technical_reference_manual_en.pdf: "Note that due to speed limits of SAR ADCs, the operating clock of Digital Reader1 and SAR ADC1 is DIGADC_SARCLK, the frequency of which affects the sampling precision. When the frequency of DIGADC_SARCLK is higher than ...
- Sun Jan 19, 2025 6:47 pm
- Forum: ESP-IDF
- Topic: ESP32-S3 Fast readings with ADC and DMA low level functions
- Replies: 1
- Views: 423
ESP32-S3 Fast readings with ADC and DMA low level functions
I am trying to make a code using ESP-IDF low level ADC and DMA functions to read 3 analog signals in sequence in a fast way (480kHz sample rate) on a ESP32-S3. 1 - Does anyone know any place I can get more information about adc_ll and gdma_ll functions? or better an example? There is no information ...