How do you know this?
If it achieves the datasheet measurements then I find it hard to believe there is a problem.
Interesting that they note the use of opa1612 in the data sheet also, usually tend to reference things like that in the evaluation literature.
Probably because you need it to get the datasheet figures. The output current is very high and they don’t want emails when people use something that can’t handle that linearly.
Dimdim, did you finished your 4497 board or did yOu already moved on to design the 4499 version ?
I've just barely started working on the 4497 board. I have very little free time these days so progress is (very) slow.
The 4499 version will have to come after that.. it will take a while since I'd like to use a "more interesting" discrete I/V stage.
The 4499 version will have to come after that.. it will take a while since I'd like to use a "more interesting" discrete I/V stage.
It would be great if yoi can prodice one pcb more (for me).... pleeeeease... I liked your reg boards as well very much...
I have no choice than to order more pcbs than I need (since the minimum number is usually 5) so there will be spare pcbs to go around.
But the difficulty level of the build will be high.. I'm planning to also include an XMOS USB receiver as well as an s/pdif receiver on the same board, plus a uC for control.
But first I'll do the (dual) 4497 board.
It will most likely take several months for the 4499 to become available anyway.
But the difficulty level of the build will be high.. I'm planning to also include an XMOS USB receiver as well as an s/pdif receiver on the same board, plus a uC for control.
But first I'll do the (dual) 4497 board.
It will most likely take several months for the 4499 to become available anyway.
It would be cool to have a second i2s option to attach a beaglebone botic or ian's fifo directly to the dac....unfortuantely your mailbox is full, so please accept my application for your 4497 board here...
@Dimdim & others here:
Hi again ;-) ... just a brief comment here to say that I think the AK4499 is already available for sale if the Danish distributor can be taken as an expression of what is generally possible ...
Cheers,
Jesper
Hi again ;-) ... just a brief comment here to say that I think the AK4499 is already available for sale if the Danish distributor can be taken as an expression of what is generally possible ...
Cheers,
Jesper
That's odd, Digikey (AKM's official distributor) doesn't even list it yet. Usually it lists new parts literally months before they actually become in-stock.
Does the Danish distributor have a web shop?
Does the Danish distributor have a web shop?
Hi ... well, the website according to the Danish representative's email should be atxx.de (they also cover Denmark). This website, however, seems to be replaced by:
Unternehmensverbund fur Halbleiter und Netzwerkkomponenten: Atlantik Networxx AG
It doesn't appear to be a web-shop-like-site but the last time I spoke with the representative he could sell me two DACs - and also mentioned that the AK4499 had been officially released for sale ...
Cheers,
Jesper
Unternehmensverbund fur Halbleiter und Netzwerkkomponenten: Atlantik Networxx AG
It doesn't appear to be a web-shop-like-site but the last time I spoke with the representative he could sell me two DACs - and also mentioned that the AK4499 had been officially released for sale ...
Cheers,
Jesper
Price is the bottom line though isn't it 😀
All of AKs DACs are very reasonably priced except for the AK4497 which sees a significant price jump vs all of their others. Hopefully the 4499 won't be vastly more expensive. Or maybe the 97 will lower in price and the 99 take it's spot. Who knows. The only thing we can say for sure is that they'll want to both outperform ESS on price and performance to ensure market dominance for the go to choice across the board.
All of AKs DACs are very reasonably priced except for the AK4497 which sees a significant price jump vs all of their others. Hopefully the 4499 won't be vastly more expensive. Or maybe the 97 will lower in price and the 99 take it's spot. Who knows. The only thing we can say for sure is that they'll want to both outperform ESS on price and performance to ensure market dominance for the go to choice across the board.
...
🙂 ... Well, then I'll just casually mention that the price to my memory was just above DKK 400 - likely plus VAT as this tends to be the case when communicating with a company. Thus about DKK 500 - or EUR 67.
Jesper
....
🙂 ... Well, then I'll just casually mention that the price to my memory was just above DKK 400 - likely plus VAT as this tends to be the case when communicating with a company. Thus about DKK 500 - or EUR 67.
Jesper
67€ sounds about what I would expect.. About 15-20% more than what the 4497 currently costs.
I don't think they'll be pulling the 4497 from their portfolio for several years. It's a relatively new part and the 4499 is not the 4497's upgrade path. It's a completely new category of chip for AKM.
It's true that the cost of the actual DAC chips is usually inconsequential compared to the total cost of a complete DAC. But still, if one were to design a full blown design with the 4499 he would need 4 of them (in order to get balanced output at the best possible SNR & THD). That's close to 300€ only in dac chips.
Jesper, I'll keep your local distributor in mind for when I get to the 4499 build.. If I bought chips right now they'd just waste space in some shelf in my lab for at least 6 months. The 4497s that I have have been doing just that for over a year now.
I don't think they'll be pulling the 4497 from their portfolio for several years. It's a relatively new part and the 4499 is not the 4497's upgrade path. It's a completely new category of chip for AKM.
It's true that the cost of the actual DAC chips is usually inconsequential compared to the total cost of a complete DAC. But still, if one were to design a full blown design with the 4499 he would need 4 of them (in order to get balanced output at the best possible SNR & THD). That's close to 300€ only in dac chips.
Jesper, I'll keep your local distributor in mind for when I get to the 4499 build.. If I bought chips right now they'd just waste space in some shelf in my lab for at least 6 months. The 4497s that I have have been doing just that for over a year now.
Well, feel welcome to do so of course. And should you need some kind of "connectivity" between you and the distributor be welcome to let me know.
... that is my impression as well ... May be interesting to see how it catches on ....
Cheers,
Jesper
I'm afraid that we'll have a rerun of the Sabre i/v episodes.. The datasheet recommends the use of op-amps but many inmates (myself included) will feel the need to go the discrete way.. At least the datasheet is clear that we'll need to do i/v separately for each channel and then sum the signals. That eases the current requirements on the i/v. But it increases parts count considerably for the discrete stage fans.
the more you upsample those AKM dacs the cleaner they sound, but you also lose bass punch and 'grunt'.
I'm assuming you mean the resistors form a divider between Vcc and Gnd and 64 ohms is the parallel value between Vcc and Gnd to the mid point?