Part Number: INA226EVM Hello, I'm looking over the -48V Telecom Current, Voltage and Power Sense with Isolation Design and I notice that in the schematics the VBUS voltage is connected to V+ pin 10 instead of V- pin 9.
https://www.ti.com/product/…
Hey Hakan,
When working on the new design, if you need isolation between the load and the MCU/Processor, you can use a digital isolator, similar to these designs:
https://www.ti.com/tool/TIDA-00313
https://www.ti.com/tool/TIDA-01608
Note that if you follow…
Part Number: INA280 Other Parts Discussed in Thread: INA226 I'm looking to utilize the INA280 to sense current on the negative voltage Rail (Low Side). I came across a TI Designs circuit ( TIDA-00313 ) that employs the INA226 to monitor negative voltages…
Hello Mo,
I was mostly concerned with the low level voltage thresholds and outputs from the isolator. However, looking over the specs for the ISO1541QDRQ1, it looks like they should be compatible. I would still recommend looking at the full transmission…
Hello Stanly,
You are correct, the INA219 does not support that BUS voltage. If the INA219 is still needed, then here are a couple of design guides that can be used to to make this work:
https://www.ti.com/tool/TIDA-00528
https://www.ti.com/tool/TIDA-…
Hi Shreya,
Our devices are not designed for isolation, so isolating IN+ and IN- would cause unpredictable behavior. If you are interested in isolation, you can reference the following reference designs:
https://www.ti.com/tool/TIDA-01608 - Positive bus…
Hello DJ,
One other option would be to float the supply of the device to support negative VCMs. Here is an reference design where this is done: https://www.ti.com/tool/TIDA-00313
Note that if you follow this design to make sure the the digital isolator…
Hello Varban,
Thank you for using the TI forum. I agree that this figure is a little confusing. The GND of the load and the INA should actually be the same GND. If the levels are not compatible, then you can use an isolator device, as shown in these reference…
Hey Ulisse,
The INA310A (as well as our other analog out current sensors) are not capable of doing the -70V rail. That being said, we do have a couple options for you to consider:
Use a digital INA with a floating voltage and a digital isolator.
example…
Hi Jimmy,
I missed the uA. Thank you for catching that and apologies for the mistake.
I would not use the TMCS1108 as the offset error is in the mA range and would not allow for accurate measurements in uA. We do have the new TMCS1123 with higher precision…