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Original question:

UAF42: BANDPASS TELECOM FILTER using UAF42

UAF42: Need to design a 2nd order differential active Elliptic filter

Narendra allu
Intellectual 270 points
Part Number: UAF42
Other Parts Discussed in Thread: OPA1637, , THP210

Hi Thomas i need to design a 2nd order differential active   Elliptic filter for the sharp attenuation of -40dB/decade in stop bands and passband is 100Hz to 20KHz and one more filter with the pass band of 300Hz to 6KHz, can you please provide the reference design thank you.

  • 0
    TI__Guru* 93105 points

    Hello Narendra,

    The UAF42 is does not provide a differential output, but instead a conventional op amp single-ended output. Therefore, I recommend applying a fully differential op amp (FDA) such as OPA1637, or THP210, in a differential active filter topology. 

    I am closing this e2e inquiry and will address your other e2e inquiry about using the THP210 for this filter function.

    Regards, Thomas

    Precision Amplifiers Applications Engineering