reduced power XilinxŽ Spartan-3(TM) FPGAs

R

rickman

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I just read a press release about "power reduced" Spartan 3s. They
don't give much in the way of numbers, they just say the quiescent power
is reduced by *up to* 66%. The last time I checked the data sheets,
there were no power figures. Anyone know what actuals might be attached
to this value? Just how much quiescent power do these chips suck down?
Numbers on the XC3S400 would be useful.


--

Rick "rickman" Collins

rick.collins@XYarius.com
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design URL http://www.arius.com
4 King Ave 301-682-7772 Voice
Frederick, MD 21701-3110 301-682-7666 FAX
 
rickman wrote:
I just read a press release about "power reduced" Spartan 3s. They
don't give much in the way of numbers, they just say the quiescent power
is reduced by *up to* 66%. The last time I checked the data sheets,
there were no power figures. Anyone know what actuals might be attached
to this value? Just how much quiescent power do these chips suck down?
Numbers on the XC3S400 would be useful.
Click to expand...
I checked the web site and there are new numbers for the quiescent
power. For the XC3S400, Vccint = 35 mA typ, Vcco = 1.5 mA typ and
Vccaux = 20 mA typ.

Any plans to fill in the max values?

--

Rick "rickman" Collins

rick.collins@XYarius.com
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design URL http://www.arius.com
4 King Ave 301-682-7772 Voice
Frederick, MD 21701-3110 301-682-7666 FAX
 
rickman wrote:
rickman wrote:

I just read a press release about "power reduced" Spartan 3s. They
don't give much in the way of numbers, they just say the quiescent power
is reduced by *up to* 66%. The last time I checked the data sheets,
there were no power figures. Anyone know what actuals might be attached
to this value? Just how much quiescent power do these chips suck down?
Numbers on the XC3S400 would be useful.


I checked the web site and there are new numbers for the quiescent
power. For the XC3S400, Vccint = 35 mA typ, Vcco = 1.5 mA typ and
Vccaux = 20 mA typ.
Click to expand...
Are these the 'reduced' values, or the standard devices ?

The new Lattice devices also show typicals only, and they too are
many 10's of mA.
Last time I saw a leading edge MAX, it was hundreds of mA....

Sounds like they may be doing do a 'current bin', just like they do
'speed bins'.
It will, of course, mean that the non reduced ones have higher typicals,
as all the 'good ones' have been removed :)
-jg
 
Jim Granville wrote:
rickman wrote:
rickman wrote:

I just read a press release about "power reduced" Spartan 3s. They
don't give much in the way of numbers, they just say the quiescent power
is reduced by *up to* 66%. The last time I checked the data sheets,
there were no power figures. Anyone know what actuals might be attached
to this value? Just how much quiescent power do these chips suck down?
Numbers on the XC3S400 would be useful.


I checked the web site and there are new numbers for the quiescent
power. For the XC3S400, Vccint = 35 mA typ, Vcco = 1.5 mA typ and
Vccaux = 20 mA typ.

Are these the 'reduced' values, or the standard devices ?

The new Lattice devices also show typicals only, and they too are
many 10's of mA.
Last time I saw a leading edge MAX, it was hundreds of mA....

Sounds like they may be doing do a 'current bin', just like they do
'speed bins'.
It will, of course, mean that the non reduced ones have higher typicals,
as all the 'good ones' have been removed :)
Click to expand...
These are the standard numbers that they added to the data sheet on the
last go around. Not exactly bad numbers when you consider the possibly
Watts these chips will consume in normal use.

--

Rick "rickman" Collins

rick.collins@XYarius.com
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design URL http://www.arius.com
4 King Ave 301-682-7772 Voice
Frederick, MD 21701-3110 301-682-7666 FAX
 
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