I2C ADC for high precision load cell

[kuon]

Yeah, U3 has a reset pin, but if I want to wire it to the main CPU, I either need to a direct line (and modify all the boards the I2C line transit on, but I explain below why I don't want this) or add another I2C GPIO IC (maybe one with a reset condition on SCL/SDA if this exists). For the RESET pin itself, I checked, it has a built in 10k pull up, I thought this was enough and I hope I did read this correctly as I wanted to test the design and ordered the PCB.

I decided to go I2C, because the product has different sensors, and because of its shape, everything is on different boards. They are not far apart (max bus length is 20cm) and 100kHz (or even slower) is fine, but there is 12 PCB in a star topology. With my design, I can just use a single connector with power and I2C lines between boards and have each board evolves on its own, which is very modular.

And yes, it will be used inside, so the temperature is stable and it will be automatically re-calibrated on each use. (the system is weighting a cartridge, when the cartridge is removed it take a measurement, and again when the empty cartridge is placed, then examination starts and the cartridge weight will be monitored for a few days).