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Old 6th February 2010, 02:37 PM   #811
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Thanks Russ,
It looks really excellent.
When the AVCC module is included, why have it on a separate PCB?
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Old 6th February 2010, 02:44 PM   #812
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Quote:
Originally Posted by Joshua_G View Post
Thanks Russ,
It looks really excellent.
When the AVCC module is included, why have it on a separate PCB?
Two reasons.

1) Routing optimization. I laid it out that way because it allows me to better bypass and route the DAC board keeping critical nets as short as possible. It also lets me better layout the AVCC module itself concentrating on it as a unit. The net lengths actually end up shorter than if I had tried to squeeze it on the DAC board. I did not want to compromise here.

2) It's flexible. You can drop just about any 3.3V supply there you like. This is appealing to some DIY folks.

Cheers!
Russ
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Last edited by Russ White; 6th February 2010 at 02:47 PM.
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Old 6th February 2010, 04:28 PM   #813
glt is offline glt  United States
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Quote:
Originally Posted by Russ White View Post
1) Yes its included.


Keep in mind the maximum input voltage for the AVCC module is 5.5V and the minimum is 5V.

Cheers!
Russ
Must put a large warning sticker. In the past, all modules with on-board regulators were taking 5-8V
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Old 6th February 2010, 04:31 PM   #814
glt is offline glt  United States
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Default Question on IVY III

Each channel has two differential opamps, how is it configured? Thanks.
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Old 6th February 2010, 04:32 PM   #815
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Quote:
Originally Posted by glt View Post
Must put a large warning sticker. In the past, all modules with on-board regulators were taking 5-8V
It will be prominent in the manual.

We will also put it on the web page.
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Old 6th February 2010, 04:33 PM   #816
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Each channel has two differential opamps, how is it configured? Thanks.
Basically it is an I/V stage followed by a filter/buffer.
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Old 6th February 2010, 04:55 PM   #817
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Is the middle power entry (PWR3) on the IVY only powering the Ballsie section?
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Old 6th February 2010, 04:59 PM   #818
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Originally Posted by MrMajestic View Post
Is the middle power entry (PWR3) on the IVY only powering the Ballsie section?
If you do not install J1-4 yes. If you install the jumpers you only use one supply for all three sections, which is in no way to be though of as sub-optimal. Once again I was just trying to be as flexible as possible to support DIY folks who may want to try all sorts of things.

Cheers!
Russ
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Last edited by Russ White; 6th February 2010 at 05:01 PM.
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Old 6th February 2010, 05:19 PM   #819
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Both 5.08 and 2.54mm connectors can be used, am I correct? Nice if you stack the boards so you can skip running wires.
Can someone point me to the connectors that will allow me to skip the wires?
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Old 6th February 2010, 05:22 PM   #820
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Originally Posted by SoapSeller View Post
Can someone point me to the connectors that will allow me to skip the wires?
Just use sufficiently tall male pin headers on one side, and female on the other.

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Russ
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