How to wire up a circuit to reduce noise from the apllication note

Other Hardware General Electronics
1

Hi,

I'm trying to wire up this pressure sensor to my project.

In the application note, there is a diagram for reducing noise.

I'm not sure how to wire it up.

Do I connect the 1.0uf and 0.01uf caps between Vin and Gnd?

Do I connect the 750ohm in line with Vout and then connect Vout to Gnd with a 0.33 uf?

Thanks

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2

Hi,

I'm trying to wire up this pressure sensor to my project.

In the application note, there is a diagram for reducing noise.

I'm not sure how to wire it up.

Do I connect the 1.0uf and 0.01uf caps between Vin and Gnd?

Do I connect the 750ohm in line with Vout and then connect Vout to Gnd with a 0.33 uf?

Also, I don't have a 750 resistor, can I use a 680 or 820 one? Which should I use smaller or larger?

Thanks

Untitled.png
Untitled.png859×386 19.8 KB

3

Yes, the down arrows are ground and up-arrow supply.

4

Do I connect the 1.0uf and 0.01uf caps between Vin and Gnd?

Yes

Do I connect the 750ohm in line with Vout and then connect Vout to Gnd with a 0.33 uf?

Yes

Also, I don't have a 750 resistor, can I use a 680 or 820 one? Which should I use smaller or larger?

In this case it does not much matter which. The resistor and cap form a low pass filter to lessen the noise into the ADC that has a frequency above the cutoff frequency of the filter. The cutoff frequency for a 0.33uf cap and 750 ohm resistor low pass filter is 643 Hz, for the 680 ohm and 0.33 uf, 710 Hz and 820 ohm and 0.33 is 589 Hz. So very little difference.

I used this on line calculator low pass filter calculator

5

I answered in your post in Project Guidance. Cross posting is bad.

6

@ultrasonicbananna please do not cross-post. Threads merged.