Today I got one of these - Search Results for 'ads1115' on Adafruit Industries -
not tested, not even read the datasheet, but it is capable of a few 100 samples @16 bit per second.
at 16 bits I expect low(er) noise
at least it is an external one 
Today I got one of these - Search Results for 'ads1115' on Adafruit Industries -
not tested, not even read the datasheet, but it is capable of a few 100 samples @16 bit per second.
at 16 bits I expect low(er) noise
at least it is an external one