I need to generate 10Hz Square pulse with Duty cycle of 0.1% i.e. Ton=100us, Toff=99.9ms, please suggest me with readily available ICs where i can change passive components to generate the pulse accurately or via programming.
I suggest you use the 1701 (SigmaDSP) or any of our SigmaDSP parts. Some of them have converters (1701, 1761, 1781), others have sample rate converters (144x, 145x) and are only digital (1940), others can self boot without the need for a microntroller (1701, 144x, 145x).
Probably the one I would recommend you because of its integration is the 1701 as I mentioned before.
They are very easy to program through a graphical design environment called SigmaStudio
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