LM2901: Frequency to Voltage conversion

Part Number: LM2901


I need to design a signal conditioning board for a tachometer generator input. The input will be 3 Phase AC with variable frequency of 0 to 80Hz and amplitude 10V  ( in each line).

As the motor RPM changes, frequency changes. Please suggest me a frequency to voltage converter IC for sensing the frequency change.

Thanks & Regards,


1 Reply

  • Hello Madu,

    See the datasheet for the LM2907/LM2917 voltage-to-frequency converter:

    There is an applications note that may prove helpful:

    Regards, Thomas

    Precision Amplifiers Applications Engineering