[piaseczek]

Has anyone compared an impact on sound of the CCHD575X-25 with the CCHD 950X-25?
I've asked the Crystek about the 100M version of their audio grade audio 957 and it won't be available any soon.
Pulsar is out of the business...

 

[b0bb]

b0bb,
do you know if the ISO7640 digital isolator is powered by 3.3V or 5V?
According to a specification the jitter is 2x lower when powered by 3.3V.

http://www.ti.com/product/ISO7640FM/technicaldocuments

3.3V

 

[piaseczek]

Has the Accusilicon updated a specification of the AS318-B series?

http://www.accusilicon.com/AS318BM.pdf

The "s" version is +/- 1ppm and according to the graph below has a lower jitter at low f than the cchd575x.

.

 

[Whitigir]

Problem is that we dont know where to buy one

 

[Monolithic]

The peak dissipation in the resistor 68R1@120mA is just under 1W, size the TX2575 appropriately when ordering.

The best source is Texas Components which custom makes the part and they can help you further.

TC is recommending the TX2575-3, dramatically increasing the cost for modding with the 68R100 0.005% chips.

 

[b0bb]

TC is recommending the TX2575-3, dramatically increasing the cost for modding with the 68R100 0.005% chips.

What was the per-unit cost they quoted ?

 

[Monolithic]

Approx. 80USD.

 

[b0bb]

Approx. 80USD.

That is consistent with the prices of high powered versions of the Vishay Z-foils I have used in the past

 

[rafabro]

Why not Charcroft Z-Foil? Stability is 0.2ppm and these are more affordable

https://www.hificollective.co.uk/components/car_resistors.html

 

[piaseczek]

You can use it also but only if you lower the volume digitally. Rated power of the I/V resistors in the LKS 004 should be about 1W, these are 0.4W.

 

[rafabro]

TX2575 it's also 0.4W (peak 0.6W)

 

[piaseczek]

but the TX2575s could be ordered as a custom made with the rated power 1W.

 

[rafabro]

Oh, get you now. Thanks

 

[Monolithic]

The “-3” of TX2575-3 indicates a three chip version which increases wattage over the standard TX2575 which is a single chip.

The price includes double upgrading from the standard 0.1% tolerance to 0.005% tolerance (not the 0.05% tolerance version).

 

[b0bb]

Bottom right corner of the photo shows the multi-module Vishay Z-Foil resistors (R57,R59,R62)
These are the TX2575-2