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VFC 110 in V to F mode

Amtech
Genius 4545 points
Other Parts Discussed in Thread: VFC110

Dear All

Currently i am working on VFC 110 in V to  mode. I have gone through the datasheet as weel as appication mode but unable to find equation for F out in V to F mode.

Please help me if anyone worked on this.

Regards.

  • 0
    Guru 21975 points

    Shailesh,

    The VFC110 is an older device and the data sheet information is not so complete. Understand that the values for Rin and Cos values are the same for F/V mode as V/F mode and apply a 10V output in F/V mode. The circuit position of Rin is, of course, different in F/V mode. The values depend on the full scale frequency and can be read from table I on page 6. You can also read Cos values from the graph in the upper-left of page 4 assuming an Rin of 40k ohm. Full scale is 10V out for the given full-scale input frequency.

    Output voltage can be reduced proportionally by proportionally reducing the value of Rin.

    If you can provide details on your required full-scale input frequency and output voltage I may be able to provide more detailed recommendations.

    Regards, Bruce.