INA237-Q1: -48V and IOS interface

Anoop M

Part Number: INA237-Q1
Other Parts Discussed in Thread: ISO1640, INA237, TIDA-00313, INA238, INA228

Hi ,

We are looking Vi measurement for -48V rail. I have selected INA 238 237 228, But I doubt whether it will support -48V. Please clarify.
Details below:
1)supply rail -48/20A
2)VI also interfacing with ISO164x (If Can we possibly interface INA 237-Q1 with ISO1640BD?)

over 2 years ago

0 kai klaas69 over 2 years ago

Guru 140200 points

Hi Anoop,

I would think about taking an isolated amplifier being optimized for current sense applications:

https://www.ti.com/isolation/isolated-amplifiers/products.html

Kai

+1 Anoop M over 2 years ago in reply to kai klaas69

Intellectual 430 points

Sorry, not about the isolated amplifier, Please find the attached file.
1)If Can we possibly interface INA237-Q1 with ISO1640?
2)Does INA237 -Q will support -48V rail.

0 Mitch M over 2 years ago in reply to Anoop M

TI__Genius 17990 points

Hello Anoop,

Thank you for using the TI forum. Here are my responses to your questions:

Anoop M said:
1)supply rail -48/20A

Yes, this can be used in a similar way as done in TIDA-00313 (https://www.ti.com/tool/TIDA-00313).

Anoop M said:
2)VI also interfacing with ISO164x (If Can we possibly interface INA 237-Q1 with ISO1640BD?)

Yes, the INA237/INA238/INA228 can be used with the ISO1640, similar to how it is done in the above TIDA as well. (Just note that with that device, the SCL line is unidirectional, so you just need to orient it properly so that the MCU can run the clock).

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INA237-Q1: -48V and IOS interface