ESP32 Forum

Hi fellow ESP32ers,

The ESP32-S3-PICO-1 datasheet never states the RF output impedance, unlike other 'pico' variants of ESP32 chips. I was told that it was not 35 + j0 ohms nor 50 ohms, and that I needed to measure it myself. As you can imagine, I'm a beginner who doesn't have access to the kind of equipment that is required to measure impedance (I don't even have an oscilloscope). What I was wondering is, do any of you know the RF output impedance of ESP32-S3-PICO-1 (either N8R2 or N8R8 variant, I don't mind), or could you suggest how it could be measured accurately. I am using this SoC for one of my projects.

Thank you

Looking at the schematic, the Pico-1 already integrates the pi network to adjust the impedance to 50 ohm, so at least per design, that should be the impedance.

Thanks for the really quick reply! So, is that what the pi matching network is for, in the reference design of the datasheet? That does the matching, and the output impedance is immediately 50 ohms? Thanks.