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Old 19th January 2002, 02:11 PM   #1
hifi is offline hifi  Sweden
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Default Help on Dac design!!

Would this work?....
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Old 19th January 2002, 02:25 PM   #2
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would what work?
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Old 19th January 2002, 02:34 PM   #3
hifi is offline hifi  Sweden
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the image would not apear....now its even ugglyer i got it in higher rez..
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Old 21st January 2002, 04:54 PM   #4
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I haven't checked the schematic completely but the data transmission from the 8420 to the 43122 seems to be allright (as long as you choose the right modes for both parts).

On the 43122 there seems to be some mode select pins left floating - that can't be right. You should either tie them to ground or V+ (you might want to use a pull up/down resistor).

Are there anything specific you're not sure of?

Anyway I'm using the 43122 myself (as you know, ), but with a different approach. I'm feeding the 43122 with a good clock source that also drives a modified CD player. Like LC audio describes it in some of their material about LClock2. Well, at least that's how I will be doing it when I'm done.

Kasper
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Old 21st January 2002, 05:09 PM   #5
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there are three pins designated M2 M3 and M4 on the lower end of the schematic i didnt draw them directly to the cs43122 becaouse it would be even more messy...
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Old 21st January 2002, 07:32 PM   #6
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Ahh, now I see. This way you can also change the modes, nice.

Can't find any any errors then.
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Old 21st January 2002, 07:37 PM   #7
hifi is offline hifi  Sweden
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do you have a better solution?...... (for mode switching)

then im of to start drawing an layout.....tough part...


/micke
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Old 21st January 2002, 10:02 PM   #8
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At a quick glance it should work fine.

The CS8420 requires a reset pulse at start up.
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Old 21st January 2002, 10:11 PM   #9
hifi is offline hifi  Sweden
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there is a switch for it..
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Old 21st January 2002, 11:24 PM   #10
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Question What is your goal???

Hi Hifi,
With the minimum of words you supplied I am guessing what your goal is. What is the thing QGI? A stand alone clock; low jitter???
Then my question would be will the DAC featured work with a independent asynchronous clock That would also be interesting for many Sony owners as the clocks in a Sony are synchronised.
I know from Burr-Brown and Analog Devices that their Delta-Sigma converters work with a independent clock, if I recall right.
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