TDA1547

沙冰

昨天下广州和DANIEYANG捡了几颗TDA1547谁有资料可上传一份大家分享一下吗?
先倒用一个

audio-gd

沙冰

hengkong

我朋友的费力扑坏了这dd，这鬼东西难找，就让一块给我吧！[em09]

purer

以下是引用小鬼头在2004-9-4 0:22:00的发言：

这个帖子开正了老兄吃糊这一瓣。。。哈哈<I></I> [em11][em11][em11]

俺现在没时间去玩TDA1547。但以前做过，效果还算可以。总体来比现在的新出DAC要好

沙冰

aeon

分立元件的IV

沙冰

看看这个吧是什么输出的

小鬼头

不过找不到链接了[em05]

这句话说TDA1547是基于NE5532的工艺（大意吧）：Later Phillips Bitstream Chip抯 (like TDA1547) are famous for having been crippled sonically by some Idiot who integrated a analogue stage based on the NE5532 Op-Amp onto the silicon.

还有这句：On the contrary, with Philips it is of course the equivalent of a NE5532. Burr Brown did not even spring for something like their well-respected OPA2604 or OPA2132/2134, they used a really nasty CMOS Op-Amp.——看来BB公司DAC里头的内置运放更差劲，呵呵

上面第二句话的整段原文：
A number of recent Timeslicing DAC have gone further and even incorporated the rest of the analogue stage onto the chip (Philips TDA1305 and Burr Brown PCM 1710/16/28/32 come to mind). Just as it the habit of large corporations, these Op-Amp抯 used on chip are not your audiophile favorites. On the contrary, with Philips it is of course the equivalent of a NE5532. Burr Brown did not even spring for something like their well-respected OPA2604 or OPA2132/2134, they used a really nasty CMOS Op-Amp.

Of course, these Op-Amp抯 you cannot see. Nor can you bypass them anymore. They are always there and inside the Black Box you think of as "DAC".

——上面这第二小段里说，你不能跳过这内置的运放、也“看”不到它，通常是把成块芯片当作“DAC”来看待——我原来记住的是这句话。。。。但他没把TDA1547包括进去，我搞混了[em03]


下面是在论述了一番Timeslicing (即 Delta Sigma) DAC的缺点说的，意思是音质好不好很重要的要看DAC具体怎么使用、DAC是 Delta Sigma还是多比特不应该成为音质的绝对标志，并举出了成功应用 Delta Sigma DAC的商品机（Timbre 解码器, Acoustic Precision EIKOS CD机）例子： However, the presence or absence of Multibit DAC抯 or Timeslicing DAC抯 should not be seen as an absolute indicator of quality. As usual, much depends upon the implementation. This is shown by the fact that several Digital Processors or CD-Players using Timeslicing DAC抯 sound very good (Timbre DAC, Acoustic Precision EIKOS CD Player) and certainly a lot better than the worst Multibit DAC sporting Machines.

小鬼头

以下是引用purer在2004-9-4 0:06:00的发言：
所以建议玩TDA1547的朋友们，想效果好就扔掉TDA1547自带的I/V

这个帖子开正了老兄吃糊这一瓣。。。哈哈 [em11][em11][em11]

purer

所以建议玩TDA1547的朋友们，想效果好就扔掉TDA1547自带的I/V

小鬼头

以下是引用purer在2004-9-3 23:49:00的发言：
BTW：据老外透露，TDA1547芯片里头固定装有运放，外围怎么弄还得经过它。。还好，是用NE5532的工艺

估计这个老外是超级SB<I></I> <I></I> 从TDA1547的应用图就可以看得出可以不用内部I/V的。而实际上LHH800也正是没有使用内部I/V从而使整体效果有很大的提升。

原理图我没看过哦。。。现在想起来，他是讲别的比特流IC不能脱开运放。但他说NE5532这个运放的工艺，我应该没记错他的大意哦

purer

有心的可比较下LHH800与LHH700的声音
<img src="attachments/dvbbs/200494024086726.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/200494024086726.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

aeon

<img src="attachments/dvbbs/200494003874613.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/200494003874613.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
不过的确可以跳过那几个运方，刚才看错了


[em11]

purer

BTW：据老外透露，TDA1547芯片里头固定装有运放，外围怎么弄还得经过它。。还好，是用NE5532的工艺

估计这个老外是超级SB  从TDA1547的应用图就可以看得出可以不用内部I/V的。而实际上LHH800也正是没有使用内部I/V从而使整体效果有很大的提升。

小鬼头

以下是引用audio-gd在2004-9-3 20:08:00的发言：
在老外的厂家中出没有多少个可以将1547做好,再说,老外一人说的话并不代表全部,可能是他自己做不好而说出他自己的看法,正如^TDA1541也不是容易做好的,如果是的话大家不会用更容易做好的PCM63了,所以,对一个DAC来说,要做好必要有更多的理论与实践,做的DAC越多才可以对各种DAC的音质进行掌握,进而可以针对各自的特点进行更好的设计制作

说得有道理。。。器件是死的，人是活的，很重要的在乎运用。即便在国外DIY友中普遍评价较差的一些比特流DAC芯片，也不乏成功的厂机实例。。。

有些器件或线路难做好，有些容易做好，这应该是事实。。。但对个人DIY来说，试验时间机会并不多。。。要体会一下这句挺有哲理的话可能会好一些：适合自己的才是最好的选择[em11][em11]

BTW：据老外透露，TDA1547芯片里头固定装有运放，外围怎么弄还得经过它。。还好，是用NE5532的工艺。。。。。[em11][em11][em11]

audio-gd

在老外的厂家中出没有多少个可以将1547做好,再说,老外一人说的话并不代表全部,可能是他自己做不好而说出他自己的看法,正如^TDA1541也不是容易做好的,如果是的话大家不会用更容易做好的PCM63了,所以,对一个DAC来说,要做好必要有更多的理论与实践,做的DAC越多才可以对各种DAC的音质进行掌握,进而可以针对各自的特点进行更好的设计制作

电脉冲

小鬼头

但老外似乎对菲利浦的比特流DAC评价不高。。。

If it measures better it'll sound better, isn't it ?

Almost any modern 1 bit DAC chip outperforms TDA15xx chips by a large margin. The point is that they often sound absolutely worse despite their technical superiority. They also are more sensitive to jitter because of the used technique. Which creates a dillema by itself.

Old, obsolete, more distortion ( at -60 dB ) & good sounding versus modern, very low distortion & bad sounding.

How does the Technics compare to the Philips ( measured with the best instruments ) ? Had several PCM56/58 machines but even modified they could not keep my attention. PCM63 is another story, measures well and sounds OK. I made most DAC's with PCM63...

Where did you get that from ? Selective dyslexia ? I tried more DAC chips than I would like I had tried. TDA1543 is just one that is difficult to screw up because of the inherent simplicity of its application. That's what I said and I still think it is like that. PCM63,TDA1541A, AD1865 and TDA1543 are the ones that I happen to like most where TDA1543 ( TDA1541A clearly is not ) is the one that needs least energy to sound right. Very practical and almost guaranteed good results ( soundwise that is, I did not like much what I measured ). Very practical for starters.

Also it is quite strange to judge a chip in non os when you've never heard or measured it in that application.

I definitely don't like TDA1547 and Sony current pulse DAC chips or any 45 MHz clock driven DAC chip ( too hard to get silent ). Write that down so you have something to respond on next time.

I think we'll never agree on anything I'm afraid. If you want the chips you can send me a PM if you like.

audio-gd

一般来说是1541的音质易保证,1547如做得好是可以好于1541与PCM63
http://www.audio-gd.com/audio/two/new_page_8.htm