The resistor programmable continuous active high frequency filter IC is a CMOS chip that can be configured for either a lowpass, bandpass, highpass, allpass or notch filter. Butterworth, Bessel, elliptic and Chebyshev filters can be implemented. The frequency range extends to 1 MHz. The low power mode has a frequency range to 100 KHz. A power down pin reduces current consumption when the filter is not in use. The 20 pin part offers dual 2nd order filter stages. Between 2 and 5 external resistors set the filter characteristics depending on the desired response. Q can be set from between 0.25 and 50. No clock signal is required.


  • Independent Q, frequency and gain adjustments
  • Low sensitivity to external resistor variation
  • Operates up to 1 MHz
  • Q range from 0.25 to 50
  • Low Power Operation
  • Power Down Mode
  • Cascadable for Higher Order Filtering


  • Spectrum Analyzers
  • Anti-Alias Filters
  • Reconstruction Filters
  • Telecommunications
  • Tracking Filters
  • Harmonic Analysis
  • Noise Analysis
  • Data Communications
  • Wireless Applications