chives/philbrick/computing_a
> mplifiers.html
>
> Bob LaJeunesse
>
> > Sent: Wednesday, July 27, 2016 at 2:15 PM
> > From: "Scott Stobbe"
> > To: "Discussion of precise time and frequency measurement"
> > Subject: Re: [time-nuts] Precision DACs
&
16 at 2:15 PM
> From: "Scott Stobbe"
> To: "Discussion of precise time and frequency measurement"
>
> Subject: Re: [time-nuts] Precision DACs
>
> The first reference at hand I checked was the ADI Data Converter Handbook,
> 1986. Pg 60 Discusses t
The first reference at hand I checked was the ADI Data Converter Handbook,
1986. Pg 60 Discusses track & hold, with a reference to the HDD-1206 as
including track/hold on die.
On Tue, Jul 26, 2016 at 2:46 PM, Richard (Rick) Karlquist <
rich...@karlquist.com> wrote:
>
>
> On 7/25/2016 10:42 PM, Sc
In message <2ea1326f-0690-6884-8fc4-29f45c57f...@karlquist.com>, "Richard (Rick
) Karlquist" writes:
>The 5071A has a "home brew" DDS that was designed by the late
>(and great) Robin Giffard. He used what he called a "blanking"
>circuit that disconnected the DAC during the time period wh
On 7/25/2016 10:42 PM, Scott Stobbe wrote:
dramatically different due to glitching on code transition. That being
said, they are kept separate not to confuse sources of error.
FWIW:
The 5071A has a "home brew" DDS that was designed by the late
(and great) Robin Giffard. He used what he ca
As a clarification, the AD5791 is the minimum implementation of a DAC, it's
merely a resistor array with SPI controllable switches. (But an impressive
set of resistors, no doubt. Maybe with a dash of secret sauce in digital
calibration). The only guaranteed specs for the AD5791 are at DC,
everythin
On Sun, 24 Jul 2016 23:48:05 -0400
Scott Stobbe wrote:
> I doubt the AD5791 does much better than 16 bits operating at 1 Msps, when
> you include glitch energy, noise, and distortion.
What makes you think so?
Yes, if you are using the full 500kHz bandwidth then the rms noise voltage
will be 5uV
On Sun, 24 Jul 2016 19:17:29 -0500
David wrote:
> There *has* to be a better way to do this. Maybe we could build a
> wooden badger ...
What? Has the wooden rabbit failed?
As I said, I looked into this some time ago and I couldn't come up
with any "easy" way to build a DAC with more than 20 (r
The AD5791 specifications under various conditions are all roughly
consistent; 20 bits at DC, 16 bits at 10 ksps based on SFDR, and 12
bits at 1 Msps for large code changes.
Its intended application is DC where its 1 Msps update rate applies
for code steps of 500 or smaller and settling time will
I doubt the AD5791 does much better than 16 bits operating at 1 Msps, when
you include glitch energy, noise, and distortion.
On Saturday, 23 July 2016, Attila Kinali wrote:
> On Fri, 22 Jul 2016 12:15:25 -0500
> David > wrote:
>
> > If you expect analog specifications in line with the claimed di
On Sat, 23 Jul 2016 20:36:28 +0200, you wrote:
>On the other hand, a modern DACs like the AD5791 reaches full 20bit at 1Msps
>(resp 1us settling time to 0.02% @10V step, or 1us to 1LSB @500 code step).
>But using the AD5791 in a design isn't easy either. The dual voltage reference
>that is require
The AD5791 evaluation board has an unpopulated area for what appears to be an
LTZ1000 reference circuit.
Bruce
On Sunday, 24 July 2016 7:00 AM, Attila Kinali wrote:
On Fri, 22 Jul 2016 12:15:25 -0500
David wrote:
> If you expect analog specifications in line with the claimed digita
On Fri, 22 Jul 2016 12:15:25 -0500
David wrote:
> If you expect analog specifications in line with the claimed digital
> resolution of ADCs and DACs, you will be disappointed. 20 bits is
> about where they top out no matter how many bits are available; the
> best you can hope for is that they ar
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