SEN-13676 running at 1.8v vs 3.3v

Sensors Environmental
1

We are looking at using the SparkFun Atmospheric Sensor Breakout - BME280 but our board can deliver 1.8v VDD and VDDIO direct

The Bosch sensor is 1.8V for both those so we want to just run the 1,8v source and I/O to the 13676 board instead of 3.3v

Our question is if we use the 1.8v feeds, will the 4.7K pullups on the board still be ok with 1.8v input or do we need to swap those out for another value?

2

Yes, you’d likely need to swap the pull-up resistors…maybe try 2.2k ohm.

Or you could use a 1.8v level shifter instead https://www.sparkfun.com/products/19017