[sdiy] XR2206 temeperature stability within +/- 5%

[Richie Burnett]

Have you thought about doing this digitally with a low-end micro? You didn't say how pure you need the sine wave to be, but you could generate it by PWM. (You can filter the hell out of something that only needs to go up to 60Hz maximum and doesn't contain any harmonics.)

The very low maximum frequency spec is amenable to software DDS with PWM output, provided the purity spec isn't ridiculous. 

-Richie,

Sent from my Xperia SP on O2

---- Jean-Pierre Desrochers wrote ----

>I need a pure sine wave generator adjustable from 10Hz to 60Hz  at around 5v
>peak.
>The adjusted frequency should stay stable within +/- 5% temperature wise.
>The project inside metal enclosure could have temp of up to around +40deg C.
>I have a bunch of XR2206 VCO IC on hand to use.
>I wonder if the best capacitor to be used here would be
>A polystyrene type for temperature stability.. (??)
>I'll use 1% metal film resistors for the rest of circuit..
>
>
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