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LM2907

John Barrett
Prodigy 170 points

Hello,

I am doing a design where I need a frequency to voltage converter IC. The LM2907 will do the job but my question is if this will work down to a single 5V supply?

Thanks and regards,

John Barrett

  • 0
    Prodigy 170 points

    Hello,

    Could someone get back to me on this please?

    thanks and regards,

    JB.

  • 0
    TI__Intellectual 2010 points

    Hi John,

    Although the datasheet states minimum input voltage to be 6V, I don't see a reason why the part won't work below positive 6V. The only thing to keep in mind is When the input stage changes state (due to a suitable zero crossing or differential voltage on the input) the timing capacitor is either charged or discharged linearly between two voltages whose difference is VCC/2. Then in one half cycle of the input frequency or a time equal to 1/2 fIN the change in charge on the timing capacitor is equal to VCC/2 × C1. Use the following equation to calculate the output:

    VO = VCC × fIN × C1 × R1 × K