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Old 1st April 2002, 04:54 AM   #1
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Unhappy Buf-03

Hi, There,

Could anybody told me where can I get the full version data sheets of BUF-03?

Thanks in advance!
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Old 3rd April 2002, 05:12 AM   #2
BrianL is offline BrianL  United States
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I believe that it's now an obsolete part. One would need to find an old PMI (Precision Monolithics Incorporated) databook or an Analog Devices databook from shortly after they acquired PMI.
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Old 3rd April 2002, 09:05 AM   #3
sonnya is offline sonnya  Denmark
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Do not use it if it is for a new design. Use BUF04 instead or go for TI/BB.

I have a databook with BUF03. If you haven't found it yet i can scan the pages for you, but give me some time.

Sonny
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Old 4th April 2002, 02:34 AM   #4
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Thanks for your ardent passion.

Sonnya,

Could you pls send me a copy?

my e-mail address: aax_man@sina.com

Thanks in advance!


By the way, is the Buf-03 a open-loop buffer or a close-loop buffer? Performance?
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Old 18th September 2003, 06:43 AM   #5
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Quote:
Originally posted by sonnya
Do not use it if it is for a new design. Use BUF04 instead or go for TI/BB.
If you were going to go for TI/BB what parts would you recommend?

dave
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Old 18th September 2003, 07:33 AM   #6
PMA is offline PMA  Europe
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BUF634T iddled at 15 mA.
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Old 18th September 2003, 07:42 AM   #7
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Quote:
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BUF634T iddled at 15 mA.
Thanx...

i may have to ask about the idled at 15 mA but i should go grab some data and see if i can figure that out myself.

The application is
Aunt Corey's Buffered Pre

Click the image to open in full size.

dave
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Old 18th September 2003, 08:22 AM   #8
PMA is offline PMA  Europe
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For BUF634T, the iddle current is set by external resistor between pins No. 1 and 3. This current can be set from 2mA to 15mA (wire jumper). 15mA makes output stage to run in class A up to 30mA of output current. You may click on my "www" button below or visit www.ti.com to search for a datasheet.

Pavel
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Old 18th September 2003, 08:56 AM   #9
sonnya is offline sonnya  Denmark
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Quote:
Originally posted by planet10


Thanx...

i may have to ask about the idled at 15 mA but i should go grab some data and see if i can figure that out myself.

The application is
Aunt Corey's Buffered Pre

dave
Hi dave, sorry for late reply!?

You cannot compare BUF03/04 with BUF634. The Analog Devices parts are currentfeedback design and has very low distortion and wide bandwidth.

Why dont you try built the discrete version of the BUF634? The BUF634 is nothing more than a copy of the W.G. Jung buffer (Diamond buffer).

It has no feedback!

Go for the Walt G. Jung.

Use transistor like 2SC2240/SA970 for buffer and driver and Use 2SA1209/SC2911 as output idling at 20mA.

I would say it will have better sonic performance than the BUF634 alone.
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Old 18th September 2003, 10:37 AM   #10
sonnya is offline sonnya  Denmark
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By the way i have just stumpled over this link today.

It is a design done with a BUF634 and a AD8620AR with class A bias of the opamp.

and this is the benchmark.

They are not that fantastic like the one done by PMA, but the schematic is not the same either They have done a little change in the feedback loop. They have lowered the overall openloop gain of the circuit, there by revealing more of the BUF634 performance.

Take a look and jugde for you self.

The design done by PMA is indeed good to.
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