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TSSA V1.7 mosfet Current feedback amp module

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#401
sonnya said:
It will be sold as a fully assembled board. The xmos chip is an BGA package, we have no possibility to test it when it is not fully assembled.

The output stage will be an add on module, so that you can build your own filter or opamp solution "discrete" or "chip opamp".

We could have chosen to make space for passive voltage regulators but the ones i use is superior to the most.

If somebody wants to use an I2S interface with this DAC, they need to program the DAC depending on the mode they wants to use either through SPI or I2C..

All this is part of the firmware in the xmos chip..

If i would choose to provide I2S only then i think it is waste of an good chip.

DSD is only available to the DAC with prober DSD signal .. I2S does not provide it.

I have not found any AK4490 DIY kit other than DIYHK.
Click to expand...

How does the board look, dimensions etc?
 
#402
stajo said:
How does the board look, dimensions etc?
Click to expand...

The same size as the phison dac posted. Only the crossed areas are removed.

So the board is similar in size 100x130mm.

We deliver an cable harness for the power like on the picture.

For power i use an power supply from XP power right now: ECL15TU03... But any type can be used.. Meanwell T-60C for example....
 

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#405
sonnya said:
The same size as the phison dac posted. Only the crossed areas are removed.

So the board is similar in size 100x130mm.

We deliver an cable harness for the power like on the picture.

For power i use an power supply from XP power right now: ECL15TU03... But any type can be used.. Meanwell T-60C for example....
Click to expand...

I need a good DAC. But I dont understand. Will all the crossed over areas just be blank PCB taking up space?
 
#406
stajo said:
I need a good DAC. But I dont understand. Will all the crossed over areas just be blank PCB taking up space?
Click to expand...

The Final board size we made yesterday evening is 71x110mm

As you can see there is added the power connector J7, and two new connectors

The new connectors did not change the price, but it add possibilities for future upgrade.

J4 - Frontpanel connector for samplerate for PCM and DSD, buttons, volume wheel.
J5 - Preamp connector for feeding an preamp module with +/-15VDC, +5.5VDC, I2C and SPI for io expansion -> Relay switching input, attenuator..

😉
 

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#416
sonnya said:
The Final board size we made yesterday evening is 71x110mm

As you can see there is added the power connector J7, and two new connectors

The new connectors did not change the price, but it add possibilities for future upgrade.

J4 - Frontpanel connector for samplerate for PCM and DSD, buttons, volume wheel.
J5 - Preamp connector for feeding an preamp module with +/-15VDC, +5.5VDC, I2C and SPI for io expansion -> Relay switching input, attenuator..

😉
Click to expand...


So, you mean you will develop a preamp to match this DAC board?
 
#418
rogerchou said:
So, you mean you will develop a preamp to match this DAC board?
Click to expand...

There is 3 options here.

1) fixed output stage on top of dac board
2) preamp on the side and a fixed output stage on top of the dac connected to the preamp as an extra lineinput
3) variabel outputstage (cable from preamp connector to the outputstage board)

3. Option does not have extra Line inputs but are cheaper than the 2. Option

I hope it clears some of the questions

Br Sonny
 
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