Vasile Surducan wrote:

>> Isn't both of this (a linear regulator providing a lower voltage for the
>> PWM, op amp driving the output) low on the efficiency scale? I still
>> think that a switcher that provides a low voltage plus maybe PWM sounds
>> like the better deal. What's the problem with this?
> 
> Noise and price I think. There are only a few small noise switchers on
> the market, most of them made by Linear Technology. But probably there
> are others. My opinion is that you want an accurate sensor, then avoid
> noise.

I understand that. But I don't know the particular sensor, and Mauricio
says that he wants to drive the sensor with unfiltered PWM... I thought if
that is compatible with the measurement principle and required precision, a
bit of ripple or noise can't hurt either.

Gerhard

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