AD8231 op-amp bandwidth and part number

I have implemented a Sallen-Key high-pass filter using the op-amp in the AD8231. The high-pass filter response is there but there is also a low-pass response around 100kHz.

Is this due to the frequency response of the op-amp itself or can it be increased?

Also, what is the part number for this op-amp? There is no reference to a specific part number for it in the data sheet for the AD8231.

Parents
  • Which op amp?  The OP281 rev D, page 3 d.s. says 95 kHz gbw on 3V??

    The tool will let you pick other op amps.  But if the op amp won't work, it won't let you

    pick it.   Try the ADA4666-2, ADA4528-2, ADA4528-1, ADA4691-2.  All are less than

    5 years old, so they should be around for a long time.

    Harry

Reply
  • Which op amp?  The OP281 rev D, page 3 d.s. says 95 kHz gbw on 3V??

    The tool will let you pick other op amps.  But if the op amp won't work, it won't let you

    pick it.   Try the ADA4666-2, ADA4528-2, ADA4528-1, ADA4691-2.  All are less than

    5 years old, so they should be around for a long time.

    Harry

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