madbeanpedals::forum

Projects => General Questions => Topic started by: DutchMF on April 16, 2012, 04:01:06 PM

Title: MN3007/MN3207 Datasheets question
Post by: DutchMF on April 16, 2012, 04:01:06 PM
Hi guys,

While checking out the datasheets for these chips, i saw that the pin out is identical, while the Porkbarrel docs gave me the impression that it should be different, with the jumpers and all? ??? ???

Am I missing something or are these the wrong datasheets?

Paul
Title: Re: MN3007/MN3207 Datasheets question
Post by: DutchMF on April 16, 2012, 04:02:15 PM
And here's the one for the MN3207.....
Title: Re: MN3007/MN3207 Datasheets question
Post by: madbean on April 16, 2012, 04:21:43 PM
The pinouts are the same, but the power requirements are opposite. The jumpers route ground and power to the appropriate pins depending on which IC you are using. Same with the other "power swap" projects like the Aquaboy and Dirtbag.

I don't remember exactly how I expressed this in the Porkbarrel documentation, but if I said it was due to different pinouts, that isn't accurate---the correct way should be as described above.
Title: Re: MN3007/MN3207 Datasheets question
Post by: DutchMF on April 16, 2012, 07:50:37 PM
Okay, took another look at the datasheets, this has to do with the 3007 expecting a negative supply voltage and the 3207 a positive one, right? Didn't mean to imply you weren't accurate Brian, I just didn't understand what you meant. Thanks for the answer, another bit of knowledge absorbed!

Paul
Title: Re: MN3007/MN3207 Datasheets question
Post by: Scruffie on April 16, 2012, 11:01:29 PM
Anddd because it's a source follower MOSFET, on one the output resistor needs to go to voltage, the other to ground. They do have there differences.