Burr Brown Pcm1738e

briantse · 18th August 2003, 09:06 AM

Anyone has the experience in BurrBrown PCM1738E ?
My diy dac planning is CS8420 or DIR1703 ---> DF1706 --> PCM1783 X2(mono) --> OPA627 --> OPA134.
But I don't know how to use the haedware mode of pcm1738 and how to connect two pcm1738 in mono.
Anyone can help?

Thx

weissi · 18th August 2003, 06:14 PM

Hi! as far as i know, the pcm1738 is only via spi (software mode) controllable... you´ll need a microcontroller or else.....

andrei · 20th August 2003, 08:04 PM

PCM1738 has to be configured by an MCU. Take a look at PCM1730 - essentialy the same chip with hardware configuration pins. You cannot run it in mono mode though, if I remember correctly.

If you want good mono Delta-Sigma DAC, check out SM5865CM from NPC. I just finished building a DAC around it, and upon preliminary auditions, it sounds significantly better than my earlier PCM1730 project

.

rfbrw · 20th August 2003, 10:11 PM

Quote:

Originally posted by briantse
Anyone has the experience in BurrBrown PCM1738E ?
My diy dac planning is CS8420 or DIR1703 ---> DF1706 --> PCM1783 X2(mono) --> OPA627 --> OPA134.
But I don't know how to use the haedware mode of pcm1738 and how to connect two pcm1738 in mono.
Anyone can help?

Thx

The PCM1738E has no hardware mode per se only default settings in the registers on start up. If you want mono as in L+/L- in one dac and R+/R- in the other, you will need additional hardware. One small problem. In order to use the DF1706 you will need to bypass the internal digital filter of the PCM1738. To do this you have to write to one of the internal registers. As the WCKO of the DF1704 is fixed at 8Fs it is unlikely that the pair will work together with the 64Fs oversampling default setting of the PCM1738E.

ray.

choique · 21st August 2003, 03:15 AM

Hi rfbrw,

You mentioned as like
"If you want mono as in L+/L- in one dac and R+/R- in the other, you will need additional hardware"

Pls exolain it more clearly?

briantse · 21st August 2003, 01:38 PM

Thanks andrei, for your recommend NPC is difficult to find in HongKong. So when i plan the DAC project , the burrbrown & cs will be appear on my mind.

The pcm1738e only has s/w mode. Any one try to use 8051 microcontroller to drive it? I has a little bit experience of assembly language.

Thx for help

rfbrw · 21st August 2003, 01:38 PM

Quote:

Originally posted by choique
Hi rfbrw,

You mentioned as like
"If you want mono as in L+/L- in one dac and R+/R- in the other, you will need additional hardware"

Pls exolain it more clearly?

No sure what you mean. Are you referring the how or the why?
For an example of a 2ch dac with differential outputs connected in mono mode see page 15 of the Analog Devices AD1852 datasheet.

ray.

briantse · 24th August 2003, 02:37 AM

Thanks andrei, for your recommend NPC is difficult to find in HongKong. So when i plan the DAC project , the burrbrown & cs will be appear on my mind.

The pcm1738e only has s/w mode. Any one try to use 8051 microcontroller to drive it? I has a little bit experience of assembly language.

Thx for help

18th August 2003, 09:06 AM	#1
briantse diyAudio Member Join Date: Aug 2003 Location: HK	Burr Brown Pcm1738e Anyone has the experience in BurrBrown PCM1738E ? My diy dac planning is CS8420 or DIR1703 ---> DF1706 --> PCM1783 X2(mono) --> OPA627 --> OPA134. But I don't know how to use the haedware mode of pcm1738 and how to connect two pcm1738 in mono. Anyone can help? Thx

18th August 2003, 06:14 PM	#2
weissi diyAudio Member Join Date: Sep 2002 Location: Austria	Hi! as far as i know, the pcm1738 is only via spi (software mode) controllable... you´ll need a microcontroller or else..... __________________ regards / servus

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20th August 2003, 08:04 PM	#3
andrei diyAudio Member Join Date: Dec 2002 Location: Canada	PCM1738 has to be configured by an MCU. Take a look at PCM1730 - essentialy the same chip with hardware configuration pins. You cannot run it in mono mode though, if I remember correctly. If you want good mono Delta-Sigma DAC, check out SM5865CM from NPC. I just finished building a DAC around it, and upon preliminary auditions, it sounds significantly better than my earlier PCM1730 project .

21st August 2003, 03:15 AM	#5
choique diyAudio Member Join Date: Aug 2003 Location: seoul	Hi rfbrw, You mentioned as like "If you want mono as in L+/L- in one dac and R+/R- in the other, you will need additional hardware" Pls exolain it more clearly?

21st August 2003, 01:38 PM	#6
briantse diyAudio Member Join Date: Aug 2003 Location: HK	Thanks andrei, for your recommend NPC is difficult to find in HongKong. So when i plan the DAC project , the burrbrown & cs will be appear on my mind. The pcm1738e only has s/w mode. Any one try to use 8051 microcontroller to drive it? I has a little bit experience of assembly language. Thx for help

24th August 2003, 02:37 AM	#8
briantse diyAudio Member Join Date: Aug 2003 Location: HK	Thanks andrei, for your recommend NPC is difficult to find in HongKong. So when i plan the DAC project , the burrbrown & cs will be appear on my mind. The pcm1738e only has s/w mode. Any one try to use 8051 microcontroller to drive it? I has a little bit experience of assembly language. Thx for help

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