Hifimediy ES9023+TE7022 24/96 USB Dac - Page 17 - diyAudio
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Old 7th January 2013, 02:27 PM   #161
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Quote:
Originally Posted by qusp View Post
LT1763 accepts 20v input, but not for a 5v output at the currents here (which are exactly?). it will thermally limit at Junction Temp 150c well before that.

read the 'Calculating Junction Temperature' example in the datasheet.

I know you are clearly not recommending 20v input, but I wouldnt even mention a 20v input being a possibility.
Right. The temperature of LT1763 will raise faster when a higher voltage supply using.
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Old 7th January 2013, 02:28 PM   #162
qusp is offline qusp  Australia
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no, I think it will not operate at all for very long if using 20v unless your load is absolutely tiny
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Old 7th January 2013, 03:42 PM   #163
alkasar is offline alkasar  France
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Nobody will power at 20V of course ! why focus on that ? I think Hifimediy mentioned to show that there will be some liberty of choice to power. Reasonalbly 6 to 9Vdc will please everyone.

My understanding from reading the description is that DC power will go through rectifier bridge (it says non polarized DC input).
LT1763 needs 0.4V drop min.
3V6 + 0.4 + 1.2 (rectifier drop) = 5.2dc absolute minimum.

Last edited by alkasar; 7th January 2013 at 04:08 PM.
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Old 7th January 2013, 04:06 PM   #164
alkasar is offline alkasar  France
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Off topic
@juhazi : I built the setup with audacity as you did.
PC -> UAE23 dac -> EMU0204 souncard input -> PC
audacity recording nothing for 10seconds. (well... not nothing, recording the noise). Then analyser > spectrum.
Nothing shows up in the window because it's below the -80dB threshold!
You must have a serious issue in your setup to measure such a noise level. Probably added gain at the input.

BTW, may I suggest to use a tool better suited for measurement, like REW for example. The RTA window shows the noise real time. You can also perform THD measurement and much more with this tool.

back on topic
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Old 7th January 2013, 04:29 PM   #165
qusp is offline qusp  Australia
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Quote:
Originally Posted by alkasar View Post
Nobody will power at 20V of course ! why focus on that ? I think Hifimediy mentioned to show that there will be some liberty of choice to power. Reasonalbly 6 to 9Vdc will please everyone.

My understanding from reading the description is that DC power will go through rectifier bridge (it says non polarized DC input).
LT1763 needs 0.4V drop min.
3V6 + 0.4 + 1.2 (rectifier drop) = 5.2dc absolute minimum.
i'm not focusing on that? you have a strange idea of focusing. why would 'nobody do that of course' when it was mentioned it was OK?

I made a single post to clarify for those reading/building that in fact running at 20v would be a bad idea, not just that 6-9v is preferred, as well as acknowledging that he didnt recommend 20v specifically.

it could be interpreted from his post that 20v would be ok, just not what he would recommend ideally

do remember while not all building this kit are beginners, quite a few will be and not read much/any of the LT1763 datasheet before first power on. Some may not understand the math to work out what would be ok as a max input voltage, because they would first need to work out the load current, I was not being critical.

Last edited by qusp; 7th January 2013 at 04:44 PM.
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Old 7th January 2013, 05:33 PM   #166
alkasar is offline alkasar  France
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The main target for this one is not diyers. Most will plug and play.

I just bought one. Will see how much current it really needs and how it measures against the small one.
I am not familiar with headphones : 30ohms seems low. What is a reasonnable load for a headphone nowadays ?
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Old 9th January 2013, 04:39 PM   #167
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This tiny DAC (in stock) is better than other ES9023 DAC I have had chance to try.

But it became another league after did some mods. Substitute USB power supply by battery, adding another LT1763 filter stage, then changed clock to low jitter one with dedicated PS. Sound became more natural, detail, open, full body and less harshness. Very easy to listen

I have just ordered the later version today to see how good the Adum4160 is

Last edited by minorchange; 9th January 2013 at 04:44 PM.
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Old 10th January 2013, 12:46 AM   #168
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Hey anh, I didn't know you were here too. Have you compared it to the moded AE?

Quote:
Originally Posted by minorchange View Post
This tiny DAC (in stock) is better than other ES9023 DAC I have had chance to try.

But it became another league after did some mods. Substitute USB power supply by battery, adding another LT1763 filter stage, then changed clock to low jitter one with dedicated PS. Sound became more natural, detail, open, full body and less harshness. Very easy to listen

I have just ordered the later version today to see how good the Adum4160 is
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Old 10th January 2013, 12:49 AM   #169
diyskat is offline diyskat  Australia
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Quote:
Originally Posted by minorchange View Post
But it became another league after did some mods. Substitute USB power supply by battery, adding another LT1763 filter stage, then changed clock to low jitter one with dedicated PS.
I am very interested to hear more details about your mods. Could you write a short guide and maybe post a few photos?
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Old 10th January 2013, 01:55 AM   #170
diyskat is offline diyskat  Australia
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Default Windows driver

I noticed that the UAE23 is also available on Amazon: Amazon.com: HiFiMeDIY Sabre USB DAC Digital to Analog Audio Converter 96khz/24bit ES9023+TE7022 + USB to Optical Converter: Everything Else

In the product description it states:
"No drivers required for Mac, Windows and Linux! However for Windows 7 we recommend installing the driver, as the default windows driver has some issues with noise."

What is the recommended driver then? I know people have mentioned the TeraLink-X2 driver before but is that the best one?
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