[time-nuts] Acam TDC's

paul swed paulswedb at gmail.com
Sun Apr 6 11:07:28 EDT 2014


Thanks for the pricing hints.
Regards
Paul
WB8TSL


On Sun, Apr 6, 2014 at 2:01 AM, Bruce Griffiths
<bruce.griffiths at xtra.co.nz>wrote:

> GP21 eval kit about 300 Euro
> GP21 about 10 Euro each
>
> Bruce
>
>
> paul swed wrote:
>
>> 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.again at 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.again at 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.
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>>>>>
>>>>>
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