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Subject: Re: Pls. help with IC CA3054

Date: 04/20/00 at 10:55 AM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: Pls. help with IC CA3054 posted by Peter L. on 04/20/00 at 4:31 AM:

Hi, Peter.

It looks like Intersil is presently "the only game in town" vis-a-vis the CA3054. The device was once second sourced by Motorola, but I coudn't find any information about that on the web site of their successor company, ON Semiconductor. Other devices from Allegro, National Semiconductor and Texas Instruments which carry the "3054" designation are entirely different products!!

The CA3054 itself is simply a set of interconnected NPNs comprising two "log-tailed differential pairs" with no resistors provided. This was supposed to make the device as versatile as possible and I guess it did.

What that means now is that the application notes for all of the other log-tailed paris such as the CA3028, the CA3004 etc. would also apply to the CA3054 if you provide the missing resistors in your circuits. You just need to make the appropriate inferences.

Good luck.

John Dunn - President
Ambertec, Inc.

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