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Old 20th June 2011, 12:57 PM   #1
DrDyna is offline DrDyna  United States
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Default Burr Brown PCM58P Upgrade?

Quick question for you guys. I was wondering if anyone knows if there are any DAC chips with the same (or similar) pinout / size as the Burr Brown PCM58P?

I've been looking around for a while now, but the chip seems old enough that most of the information has disappeared.

I'd like to replace this chip in a piece of equipment and perhaps get something more modern, perhaps up to 24/192.

Is this something anyone has done or am I being a dumbass?
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Old 22nd June 2011, 02:26 PM   #2
oshifis is offline oshifis  Hungary
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I have the data sheet of PCM56P which I believe has the same pinout as the PCM60P. Great sounding DAC chip.
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Old 22nd June 2011, 07:29 PM   #3
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by oshifis View Post
I have the data sheet of PCM56P which I believe has the same pinout as the PCM60P. Great sounding DAC chip.
That would be beautiful. Do you know what input formats the 60P will accept by chance?
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Old 23rd June 2011, 02:56 PM   #4
oshifis is offline oshifis  Hungary
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I attached the data sheet of PCM56P. I never played with it except than I have a Discman with a PCM60P inside...
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File Type: zip pcm56.zip (327.7 KB, 58 views)
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Old 23rd June 2011, 03:39 PM   #5
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by oshifis View Post
I attached the data sheet of PCM56P. I never played with it except than I have a Discman with a PCM60P inside...
Thanks sir. And another project is added to the list!
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Old 23rd June 2011, 04:40 PM   #6
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Quote:
Originally Posted by DrDyna View Post
Is this something anyone has done or am I being a dumbass?
Stop and think. All the datasheets are readily available. I downloaded the PCM58 specs and learned it is an 18-bit, monaural, DAC. It came in a 28-pin DIP package and required +5v and -12v power. It was discontinued in 1997. I doubt you will find a pin compatible replacement for it. (Why would you want to?) Neither the PCM56 or PCM60 are compatible because both are 16-bit devices with different packaging, pin-outs, and power requirements.

The 20-bit PCM63 is the logical successor to the PCM58 but it has different pin-outs and voltage requirements.

As for 24/192, the PCM58 can already do that.

Quote:
Excerpt from PCM58 datasheet: The maximum clock rate of 16.9mHz for the PCM58P is derived by multiplying the standard audio sample rate of 44.1kHz times sixteen (16X oversampling) times the standard audio word bit length of 24 (44.1kHz x 16 x 24 = 16.9mHz). Note that this clock rate accommodates a 24-bit word length, even though only 18 bits are actually being used.
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Old 23rd June 2011, 05:15 PM   #7
mlloyd1 is offline mlloyd1  United States
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the PCM58 was a nice dac, used in some well-regarded machines. there is no drop-in upgrade or replacement. pcm63 was next one up the food chain, but if you do the rework to use that one, you might be better off just changing for PC1702 or PCM1704.

;-)

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Old 23rd June 2011, 05:20 PM   #8
DrDyna is offline DrDyna  United States
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Quote:
Originally Posted by Tam Lin View Post

As for 24/192, the PCM58 can already do that.
Ok, it seems like my grasp on how dacs work is a little lackluster.

Time to do a little more research.
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