With your scope, find out if your DAC output is zero to positive  
voltages or whether it swings positive & negative.
MA

> On Dec 23, 2008, at 5:45 PM, Jinx wrote:
>
>> I'm not opposed to using an opamp as a buffer, I think I'd prefer to
>> find a single supply one though as I don't think there are negative
>> voltages in there already
>
> You could make a little -ve with an opamp or somesuch as an oscillator
>
>> Any suggestions? I've used the TL072 before but I seem to recall
>> someone mentioning it isn't the greatest nowadays
>
> I think the TL062 is the quiet one
>
> The NE5534 has been popular for quite a while





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