Buf-03

hill · 1st April 2002, 03:54 AM

Hi, There,

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

Thanks in advance!

BrianL · 3rd April 2002, 04:12 AM

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.

sonnya · 3rd April 2002, 08:05 AM

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

hill · 4th April 2002, 01:34 AM

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?

planet10 · 18th September 2003, 05:43 AM

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

PMA · 18th September 2003, 06:33 AM

BUF634T iddled at 15 mA.

planet10 · 18th September 2003, 06:42 AM

Quote:

Originally posted by PMA
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

dave

PMA · 18th September 2003, 07:22 AM

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

sonnya · 18th September 2003, 07:56 AM

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.

sonnya · 18th September 2003, 09:37 AM

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.

1st April 2002, 03:54 AM	#1
hill diyAudio Member Join Date: Nov 2001 Location: G.Z. China	Buf-03 Hi, There, Could anybody told me where can I get the full version data sheets of BUF-03? Thanks in advance! __________________ I change therefore I am.

3rd April 2002, 04:12 AM	#2
BrianL diyAudio Member Join Date: Mar 2002 Location: USA	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. __________________ bel

4th April 2002, 01:34 AM	#4
hill diyAudio Member Join Date: Nov 2001 Location: G.Z. China	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? __________________ I change therefore I am.

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3rd April 2002, 08:05 AM	#3
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	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

18th September 2003, 06:33 AM	#6
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	BUF634T iddled at 15 mA.

18th September 2003, 07:22 AM	#8
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	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

18th September 2003, 09:37 AM	#10
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	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.