Virtex4 temperature-sensing feature... does it work?

Hello guys,

Has anyone used the DXP and DXN pins in Virtex-4 yet? If so and if the 
results were all right, what external sensor did you use...?

Thanks in advance,

-- 
Ignacio Ulises Hernandez
" I'm not normally a praying man, but if you're up there, please save me, 
Superman!" - Homer Simpson ;O) 

We are using it on the 4VFX-20 's without any problems.

Hi there,

 I'm actually using the thermal diode right now with the MAX6642 temp 
sensor IC. External diode sensor measurement range of this IC is 0C to 
150C. So far I've looked at approx 20 V-4 devices from a number of 
different lots. This external IC is accurate to ~ +/- 2C from 0C to 
105C. I'm using a calibrated temp forcing system from Temptronic (+/- 0.5C).

Regards,
Anthony

I. Ulises Hernandez wrote:

>Hello guys,
>
>Has anyone used the DXP and DXN pins in Virtex-4 yet? If so and if the 
>results were all right, what external sensor did you use...?
>
>Thanks in advance,
>
>  
>

"I. Ulises Hernandez" <delete@e-vhdl.com> wrote in message 
news:dk83ch$eki$1@nwrdmz01.dmz.ncs.ea.ibs-infra.bt.com...
> Hello guys,
>
> Has anyone used the DXP and DXN pins in Virtex-4 yet? If so and if the 
> results were all right, what external sensor did you use...?
>
Works just fine in V2PRO. I use a MAX6695.
http://pdfserv.maxim-ic.com/en/ds/MAX6695-MAX6696.pdf
Cheers, Syms. 

I. Ulises Hernandez wrote:
> Hello guys,
>
> Has anyone used the DXP and DXN pins in Virtex-4 yet? If so and if the
> results were all right, what external sensor did you use...?
>
> Thanks in advance,

I've used it on a number of V2 and V2P FPGAs.  All have worked,
although there was a board at Agilent that (presumably) had a noise
issue and would read about 20 degrees high.
Moral: follow the layout recommendations in the monitor chip data
sheet.

I prefer to use something like the LM87, as this allows me to monitor
the supply rails as well.

Regards,
Allan

Thanks guys,

I'll use it.

Regards,
Ulises

<allanherriman@hotmail.com> wrote in message 
news:1130899910.307957.266410@f14g2000cwb.googlegroups.com...
> I. Ulises Hernandez wrote:
>> Hello guys,
>>
>> Has anyone used the DXP and DXN pins in Virtex-4 yet? If so and if the
>> results were all right, what external sensor did you use...?
>>
>> Thanks in advance,
>
> I've used it on a number of V2 and V2P FPGAs.  All have worked,
> although there was a board at Agilent that (presumably) had a noise
> issue and would read about 20 degrees high.
> Moral: follow the layout recommendations in the monitor chip data
> sheet.
>
> I prefer to use something like the LM87, as this allows me to monitor
> the supply rails as well.
>
> Regards,
> Allan
>