[time-nuts] Acam TDC's
not.again at btinternet.com
Sat Apr 5 20:03:19 EDT 2014
It's not exactly cutting edge resolution etc, but for a ready to go
chip, it's not at all bad. In theory, it looks like it should be
useful in a lot of the places that counters like a 53131/2 get used,
but it can sample very much faster than them. It also has useful
Most of the projects I've come across don't stretch its performance so
I'm just interested if someone has really tested it.
If not, I expect I'll find out more when I get it up and running.
On Fri, 4 Apr 2014 18:27:05 -0400, you wrote:
>An interesting chip. I had never heard of it before and suspect this may be
>the gizmo used in closed system water leak detection. Won't go into why I
>know about that.
>I did find comments from 2007 about the chip and atmega but nothing since.
>When I went looking for distributors or pricing to get an idea came up
>empty. Though Amazon will sell you lots of vitamins or something called TDC.
>So with all that said I will guess that for time-nuts purposes the
>capabilities of this chip have been far exceeded by the various array
>technologies we have at very cheap prices today. The ability to create long
>counters at very high speeds.
>Only a guess though.
>On Fri, Apr 4, 2014 at 5:35 PM, Angus <not.again at btinternet.com> wrote:
>> With all the recent talk of interpolators, I started looking at the
>> acam TDC chips again - the GP22 is pretty cheap now for anyone who's
>> up for playing with the tiny QFN package.
>> I was wondering if anyone here has tried them or properly evaluated
>> them as a TIC - especially the GP2/GP21/GP22.
>> A few years back a some folk were talking about it, but I did not hear
>> much since that.
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