INA240-Q1: Input line layout

Tomoyuki Ito

Prodigy 50 points

Part Number: INA240-Q1
Other Parts Discussed in Thread: INA240

The area around the input line of the current sense amplifier is planned to have no potential.

What is your view?

over 4 years ago

0 kai klaas69 over 4 years ago

Guru 140200 points

Hi Tomoyuki,

what do you mean by this? That you don't plan to run the input lines over a solid ground plane? Or that you plan to leave the input lines floating relative to the supply voltage and signal ground of INA240?

Kai

0 Tomoyuki Ito over 4 years ago in reply to kai klaas69

Prodigy 50 points

Hi kai,

we connect to battery volatage 12V to IN- IN+.

Please tell me in which area the area around the input line should be laid out.

+1 Guang Zhou over 4 years ago in reply to Tomoyuki Ito

TI__Mastermind 35680 points

Hi Ito-san,

It is common practice to pour a ground plane and run input lines as diff pair through the plane. This way the lines are surrounded by copper of fixed potential, if this is what you’re asking? If so, yes it is OK.

Regards, Guang

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INA240-Q1: Input line layout