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AF161 - Dual Universal Active Filter

General Description

The AF161 consists of 2 general purpose state variable active filters in a single package.

By using only 4 external resistors for each section, various second order functions may be formed.

Low pass, high pass, and band pass functions are avaiable simultaneously at separate outputs.

Key Features

  • Independent a, frequency and gain adjustment.
  • Very low sensitivity to external component variation.
  • Separate low pass, high pass 'and band pass outputs.
  • Operation to 40 kHz.
  • a range to 500.
  • Wide power supply range ±5.0.

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ll?A National D Semiconductor Active Filters AF161 Dual Universal Active Filter General' Description The AF161 consists of 2 general purpose state variable active filters in a single package. By using only 4 external resistors for each section, various second order functions may be formed. Low pass, high pass, and band pass functions are avaiable simultaneously at separate outputs. In addition, there are 2 uncommitted operational amplifiers which are available for buffering or for forming all pass and notch functions. Any of the classical filter configurations, such as Butterworth, Bessel, Cauer, and Chebyshev can be easily formed. The AF161 is pin com· patible with the AF151.