ADC Chip w/ hardware low-pass filter??
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- acquisition
- Posts: 14
- Joined: Mon Feb 09, 2009 3:06 pm
ADC Chip w/ hardware low-pass filter??
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?
- zener
- Posts: 4567
- Joined: Sat Feb 21, 2009 2:38 am
Re: ADC Chip w/ hardware low-pass filter??
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.
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.
Please be positive and constructive with your questions and comments.