Hi everyone,
I’m trying to understand the SPI transaction latency on the ESP32-S3 when communicating with a fast external ADC ( ADS7040 , 12-bit SPI ADC).
According to my measurements, each SPI transaction (2 bytes per sample) takes about 15 µs , which gives a sampling rate of roughly 65 kSamples/s ...
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- Fri Oct 31, 2025 7:29 pm
- Forum: ESP-IDF
- Topic: Why is SPI transaction latency (~15 µs for 2-byte transfers) so high on ESP32-S3?
- Replies: 1
- Views: 2055