ADC Chip w/ hardware low-pass filter??

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acquisition
 
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ADC Chip w/ hardware low-pass filter??

Post by acquisition »

Anyone know of an ADC Chip with a hardware low-pass filter or just a hardware low-pass multiple-pole filter chip? I am looking for something to interface an accelerometer to an Arduino. The accelerometer's signal needs to be low-pass filtered at about 100 Hz. Anyone have any ideas?

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zener
 
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Re: ADC Chip w/ hardware low-pass filter??

Post by zener »

I think a simple RC should take care of that. And I seem to recall that some accelerometers have the filter built in also. Freescale has some like that.

According to this site:

http://www.muzique.com/schem/filter.htm

A 15K and .1uF or 1.5K and 1uF should do the job. I doubt it is too critical though. You could filter it in software also.

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