Very small noise when measuring small current with ADS1115

[johnerrington]

As

@TomGeorge

The current you are trying to measure is sharing the same path as the 1115 module. also through a protoboard connection.

Although I disgree with his suggestion.

You need to keep the analog and digital grounds seperate until you have a common "star point" which should be at the ADC ground.

You should have decoupling caps across the VDD & GND of the adc.

Also try changing the serial data rate.