TIPD170: Low pass filter

Guillaume Degroote

Part Number: TIPD170
Other Parts Discussed in Thread: INA826EVM

I will be using this strain gauge design in a car (tetsing rods). Their will be a lot of EMI and I would like to add a 200-Ohm Low Pass Filter. Where would you suggest adding this to the cricuit?

9 months ago

0 Raymond Zhang1 9 months ago

TI__Guru 52961 points

Hi Guillaume,

Here is a method to introduce differential and common mode LPFs in front of an instrumentation amplifier. Enclosed is a captured image from INA826EVM, see the link below.

https://www.ti.com/lit/ug/sbou115c/sbou115c.pdf?ts=1699709439440&ref_url=https%253A%252F%252Fwww.google.com%252F

In addition, you may consider to use shielded and matching impedance cable to reject the common mode noises.

If you have other questions, please let me know.

Best,

Raymond

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TIPD170: Low pass filter