Does anyone knows the altmustech I2S/LVDS Modules? - diyAudio
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Old 31st January 2015, 05:39 PM   #1
DieterK is offline DieterK  Germany
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Default Does anyone knows the altmustech I2S/LVDS Modules?

Hello,

does anyone know the modules rm-t400 and tm-t400 and can say something about?

altmustech | tm-t400

altmustech | rm-t400

I will eventually use the modules to connect a CD (philips cdm2) with an extern DAC.

Thanks for help
Dieter
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Old 1st February 2015, 11:04 AM   #2
marce is offline marce  United Kingdom
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How far are you transmitting the signal?
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Old 1st February 2015, 01:13 PM   #3
DieterK is offline DieterK  Germany
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The cd and the dac cases will stand side by side. I think that there will at maximum 50cm cable between them.

Regards
Dieter
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Old 1st February 2015, 05:09 PM   #4
marce is offline marce  United Kingdom
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I would imagine these would be far better than trying to take the RAW I2S signal off board (something it is not designed to do) and LVDS is the best method of transmitting such a signal. No ground connection between the units
Do you know what device they use, I couldn't find any info on their site...
I am a fan of LVDS, its far better than messing with a single ended signal... I would like to know the devices they are using, those data sheets will give further insight.
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Old 1st February 2015, 06:39 PM   #5
DieterK is offline DieterK  Germany
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Only on the photos is something to see: em22ac for the receiver and em52ab for the transmitter. But i don't find anything about them...
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Old 1st February 2015, 06:44 PM   #6
DieterK is offline DieterK  Germany
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I found altmustech as a user here. I send him a PM. Hope he can say more about the chips...
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Old 3rd February 2015, 08:49 PM   #7
Hsmeets is offline Hsmeets  Netherlands
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the chips used are the DS90C031TM and DS90C032TM from Texas Instruments.
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Old 4th February 2015, 10:17 AM   #8
marce is offline marce  United Kingdom
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Probably the best way to transmit signals is LVDS (look at USB and the Ethernet.)
No ground connection required, over the short distance to be used probably not much noise pick up...
I'd be interested in any views you have when you try them (if you do).
I have seen these devices used before but not for Audio signals, rear end of 50 ADC channels to send digital data down differential PCB routes.
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Old 4th February 2015, 10:23 AM   #9
Hsmeets is offline Hsmeets  Netherlands
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Quote:
Originally Posted by marce View Post
snipped......I have seen these devices used before but not for Audio signals, rear end of 50 ADC channels to send digital data down differential PCB routes.
In case you mean analog signal with 'Audio signals':

I believe it's the intention of the OP to run I2S signals from the player to the DAC. These are digital/logic signals.

These modules are in functionality equal to Twisted Pear's Teleporter modules.
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Old 4th February 2015, 10:35 AM   #10
marce is offline marce  United Kingdom
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Read what I said the rear end of ADCs they carried the digital outputs of the ADCs, so they could be transmitted as differential signals down differential routing, instead of single ended, thus allowing me to reduce crosstalk noise pick up for the 50 digital signals for each analogue channel, this was a test board for UV sensor to go in a satellite(so not audio based analogue)... So I would hope that laying out such a board I could differentiate between analogue and digital signals..........
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