This thread is dedicated to the Cirrus Logic flagship DAC chip called．．．
The CS4398 is a complete stereo audio 24-bit/192 kHz digital/analog converter (DAC) system. This D/A system includes digital de-emphasis, half dB step-size volume control, ATAPI channel mixing, selectable fast and slow roll off digital interpolation filters followed by an oversampled multibit Delta-Sigma modulator, which includes mismatch shaping technology that eliminates distortion due to capacitor mismatch. Following this stage is a multi-element switched capacitor stage and low-pass filter with differential analog outputs.
The CS4398 DAC also has a proprietary Direct Stream Digital (DSD) processor, which allows for volume control and 50 kHz on-chip filtering without an intermediate decimation stage. It also offers an optional path for direct DSD conversion by directly using the multi-element switched capacitor array. The CS4398 accepts PCM (pulse code modulation) data at sample rates from 32 kHz to 200 kHz and DSD audio data, has selectable digital filters, consumes little power and delivers excellent sound quality.
This DAC chip sounds pretty good!
Naturally, in the right circuit with the correct synergy etc.
No I don't have evidence on paper that it sounds good, that's another discussion, send your hate mail to Cirrus Logic.
Over time, it's found it's way into several high-end products and become accepted in DIY.
Naturally this is (or should be) a carefully designed product, from the DAC chip to the capacitors, to the amplification, voltage supply, circuit layout, EMI rejection, teflon, silk, gold-plated terminals and what have you!
So I noted it uses the CS3498 DAC chip, and the AD823 op-amp.
I've been using the AD823 op-amp for a few weeks now, like many others I love the sound of AD823 for some reason.
Another portable device with CS4398.
I hope this has not changed in later models.
It has a line-out and headphone-out, using ADA4075-2 I think.
Is it a true line-out? Have they changed any chips? Are there any fakes of this?
No-name CS4398 DIY DAC / ljmaudio.net
Here is the one I have. It's not really DIY since you can buy it completely finished, from here - http://www.ebay.com/itm/Finished-CS4398-CS8416-USB-DAC-With-Transformer-case-/120769856777
I've used that seller (along1986090) four times now, sometimes he uses DHL and he's very good. I think he offers 1 year warranty too.
If you look at the circuit board on the DAC, it says "ljmaudio.net".
In my experience, this DAC needs to be modified, with AD797 on the line-out. You can buy the AD797 from seller aud_jade - http://www.ebay.com/itm/mod-1x-AD797BR-Dual-Mono-Op-amp-module-ultralow-noise-replace-dual-op-/261100530695
The AD797 is a monolithic (mono) chip, so make sure you buy the dual (stereo) version, i.e. with two chips on one.
You may want to try AD823 as well. I bought mine from seller hifi-szjxic - http://www.ebay.com/itm/1X-AD823AR-Dual-16-MHz-Rail-to-Rail-FET-Input-Amplifier-AD823-SOIC-to-DIP-/120777365049
You can listen to this DAC without an amplifier if you want to, then you'll need a cable like this - http://www.ebay.com/itm/3M-Choseal-Q-374-3-5mm-female-to-AV-RCA-Audio-Adapter-Cable-for-iPod-MP3-MP4-/170750947728
PD01 v1.1 / Breeze Audio TE7022 / CS4398 DAC by weiliang
This one is very cheap. It looks pretty decent overall, it's using TE7022 as the USB chip and OPA2132 as op-amp for the included headphone amplifier.
Is it a true line-out or is there a chip for that too? Not sure. It's using WIMA 2.2uF capacitors next to the line out too, sorry I am not familiar with these or if they have any effect.
This could be very excellent value versus sound! I haven't heard it.
If you're looking for an equally cheap, excellent value amplifier to use with it, here's one - http://www.ebay.com/itm/260967685182
That's called the RA1 I think (it says Y-191 on the circuit board), it uses two 9V batteries for 18V (+-9V) which means it can supply voltage to op-amps like the OPA627.
Topping TP-D1 MKII
This one looks very very pretty.
A nice Cirrus Logic Flagship to take to the office.
This one uses PCM1706 as the USB chip, and OPA2134 as the headphone driver.
It also seems to have line-out and SPDIF out.
- DAC list to be continued -
Please leave comments and questions.
Enjoy high-quality sound for less.
Edited by kiteki - 11/11/12 at 9:43pm