INA219: Which INA2## is most suitable for 5V@2A rail current sensing?

Moral Assraf

Prodigy 155 points

Part Number: INA219
Other Parts Discussed in Thread: INA229

I'm looking for current sense IC for 5V@2A rail, controlled by Raspberry PI.

Does INA219 will do?

Thanks,

Moral.

over 1 year ago

0 Mohamed Hamida over 1 year ago

TI__Expert 6602 points

Hi Moral,

This could depend on a few factors such as error, shunt size, and common mode voltage. Fortunately, we have multiple tools that can help us choose both a shunt resistor as well as the correct power monitor for the use case. Firstly is the power monitor tool: https://www.ti.com/tool/download/SBOR021. There is information on how to use it in this app note: https://www.ti.com/lit/an/sboa511a/sboa511a.pdf?ts=1695829107173. This tool makes it easy to choose a power monitor depending on various design constraints. Next is the error calculation tool, this will help you gauge and compare devices with various error sources: https://www.ti.com/tool/CS-AMPLIFIER-ERROR-TOOL. Please let me know if you have any further questions!

Best,

Mohamed

0 Moral Assraf over 1 year ago in reply to Mohamed Hamida

Prodigy 155 points

Thanks you for the response,

It looks like INA229 will do but I find it hard to understand if it will support 2A current sensing.

Can you advice?

+1 Mohamed Hamida over 1 year ago in reply to Moral Assraf

TI__Expert 6602 points

Hi Moral,

Yes, the INA229 can be used to sense 2A of current.

Best,

Mohamed

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Amplifiers forum

INA219: Which INA2## is most suitable for 5V@2A rail current sensing?