Sub 10ps resolution is achievable with a ringing LC circuit plus a
suitable ADC.
Bruce
Don Latham wrote:
AliExpress has them, 5 piece lot for $70 shipping to US $4.21. One claim I
saw said in quad mode 22 ps resolution. Hmmmm
Don
paul swed
Angus
Yes I did a fast check and couldn't find anyone in the US that seemed to
carry it. The eval kit looks nice but will speculate its quite costly.
That said I could see some uses for it like you say it has some things
built in to eliminate false triggers and such. Just need to know if $1.59
or $159 each.
Cheap chips I may play with.
Regards
Paul.
On Sat, Apr 5, 2014 at 8:03 PM, Angus<not.ag...@btinternet.com> wrote:
Hi,
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
temperature inputs.
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.
Angus.
On Fri, 4 Apr 2014 18:27:05 -0400, you wrote:
Angus
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.
Regards
Paul.
WB8TSL
On Fri, Apr 4, 2014 at 5:35 PM, Angus<not.ag...@btinternet.com> wrote:
Hi,
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.
Angus.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
