[time-nuts] CSAC vs NAC1

jimlux jimlux at earthlink.net
Thu Apr 6 22:41:32 EDT 2017


On 4/6/17 5:11 PM, paul swed wrote:
> Jim am I reading the casc power consumption correctly? .12 and .14 W.
> Thats 10X lower.
Yes..
> Any idea on the $$

CSAC in the several kilobuck range, NAC in the 10-20k range, I think.

They're about the same size.. NAC is slightly smaller, I think.


> Regards
> Paul
> WB8TSL
>
> On Thu, Apr 6, 2017 at 6:11 PM, jimlux <jimlux at earthlink.net> wrote:
>
>> Here's a quick summary of the datasheet performance between the
>> Vectron/Accubeat NAC1 and the MicroSemi CSAC.  Bear in mind that Microsemi
>> now has a wider temp range (i'm using the old rev J datasheet)
>>
>> CSAC is 1/10th the power
>> NAC1 has a better crystal, so the phase noise is better
>> the "atomic" part is comparable in performane
>>
>>
>> Parameter       NAC1            CSAC
>> Aging           3E-10/mo        9E-10
>>                 1E-9/yr         10E-9
>>
>> ADEV            2E-11 @ 100sec  2.5E-11
>>                 8E-11 @ 10      8E-11
>>                 2E-10 @ 1 sec   2.5E-10
>>
>> phase noise
>>                 -86 @ 10        -70
>>                 -120 @ 100      -113
>>                 -138 @ 1000     -128
>>                 -143 @ 10k      -135
>>                 -148 @ 100k     -140
>>                 -150    floor
>>
>> max chg         1E-9 (-20 to 65) 5E-10  (-10 to 35)
>>
>> pwr             1.2W op         0.12
>>                 1.8W warm       0.14
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