AnsweredAssumed Answered

AD8143 Supply Voltages

Question asked by mao54321 on Nov 26, 2012
Latest reply on Nov 26, 2012 by jpearson

I'm using the AD8143 as the front end in an analog video converter, and powering it with +/- 3.3V. There's a statement in the datasheet (p18) that says "...

An internal linear voltage regulator derives power for the

comparators from the positive supply; therefore, the AD8143

must always have a minimum positive supply voltage of 4.5 V..."

 

The question I have is, if I'm NOT using the AD8143 comparators at all, is the +3.3V rail sufficient? Is there any problem using +/-3.3V, other than a reduction in range of the allowable input common mode voltage?

 

MikeO

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