cdb101:
From what I have measured yet, the pressure sensor is always outputting 0-90 mV what ever Vin is.
Then it's more than just a Wheatstone bridge, and shouldn't be measured with a HX711.
If that's the case, it has a 'voltage' output, and should be measured with an absolute A/D (like the ADS1115).
Post a link, or an image.
cdb101:
The ADC will then transfer 0 -80 mV to 0 - 5.12 Volt .... in bytes 0 - 16 bit. Correct?
No.
It converts a differential input voltage into a 24-bit digital value (not a voltage).
Leo..