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Tool/software:
Looking to add parts to a schematic to measure current draw on a single phase AC line. Considering something like the INA199 with a current transformer based on the App notes I could find but curious if this is still the simplist/suggested method or is there a more complete solution available? Already have an ADC to interface with.
US and Euro wall voltages: 120 and 230V, 60 and 50Hz
Current measured: normally operation is 3.5A, max of 10A
Pete, you need to be careful using these types of products in an AC environment due to common mode limitations. This video will walk you through varying load configurations, but you essentially would have to use one of these devices on the low side where the common mode is kept within these legal ranges to ensure the part is not damaged (you also need to maintain the recommended ratings for datasheet performance)
For AC applications, we typically recommend our TMCS11xx family of products, such as the TMCS1123. These devices have built in isolation so you would be able to skip the current transformer and measure directly on the line.
Thanks Carolus, I watched the video and have implemented the TMCS1107A1BQDRQ1 as follows in my design on a 120V/230V line to a VFD/motor:
