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Subject: Re: Switching between analog inputs

Date: 10/13/01 at 11:52 AM
Posted by: John Dunn - Consultant
E-mail: ambertec@ieee.org
Message Posted:

In Reply to: Re: Switching between analog inputs posted by keith wilson on 10/03/01 at 12:24 PM:

Hi, Angelo and Keith.

Keith, you are right on target! Maxim's multiplexer offerings are probably just what Angelo needs.

The 4000 series of devices however, if I recall correctly, are powered off of a +Vcc and ground and wouldn't be suitable for signals that might swing to negative polarity. The DG406 and DG412 etal are powered from a ±Vcc and can handle both polarities of signal voltage. (One quick tip re. the DG4xx though: Don't forget to provide a separate +5V for the logic voltage pin. I forgot that once and oh boy!)

We should also note that the DG4xx series of multiplexers are pretty much defacto standards in the industry and are offered by other companies too. In particular, I have Intersil in mind.

Good luck.

John Dunn - President
Ambertec, Inc.

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