[FAQ] TMCS1100: TMCS110x low current measurement

The TMCS110x family is limited by how low of currents it can measure. The two main culprits are offset error and noise density. One should check the input referred offset error and input referred noise density when trying to determine how low of currents they can measure with these devices.

The following images are from the TMCS1100 datasheet. One can see that the offset error is in the range of 40-60mA and the noise density is in the range of hundreds of uA.