INA240-Q1: Input Filtering

Tomoyuki Ito

Prodigy 50 points

Part Number: INA240-Q1

To reduce Gain Error as much as possible, we select Rs=1.1ohm、C IN+-IN- capacitance=1.0uF.

If we select Rs=1.1ohm, teach us C IN+-IN- capacitance.

What is your view?

over 4 years ago

+1 Carolus Andrews over 4 years ago

TI__Mastermind 24735 points

Tomoyuki-san,

The addition of an input filter will provide a 3dB cutoff by the following formula:

As you've chosen 1.1Ω for the R values, you would need to choose C appropriately to establish the desired cutoff you want. In addition to this, there is additional information regarding input filters here in this video.

Amplifiers

Amplifiers forum

INA240-Q1: Input Filtering