The dual selectable lowpass/bandpass filter IC is a CMOS chip that can be configured for either a lowpass or a bandpass filter. Each filter is selectable independently. The lowpass response can be a 7 pole Butterworth, Elliptic or Bessel filter. The band pass response can be a six pole full, third or sixth octave bandpass filter. The device uses switched-capacitor filters and no external components (except for decoupling capacitors) are required, Only an external CMOS level clock is needed.

An externally selectable gain setting pin, a power down pin and clock to corner ratio select pin are included. Typical current consumption is as low as 500 uA and the minimum operating voltage is 1.1 volts, making the device ideal for portable applications.


  • Two Independent Filters
  • Six Filter Types In One Package
  • No External Components
  • Switched Capacitor Filters
  • Low Power Operation
  • Low Voltage Operation
  • Adjustable Gain 0, 6 or 12 dB
  • Small Package Size
  • Low Cost
  • On Chip Power Save Pin
  • ANSI Compatible Bandpass
  • Op Amp Input


  • Spectrum Analyzers
  • Battery powered General Purpose Systems
  • Portable Systems
  • Anti-Alias Filters
  • Reconstruction Filters
  • Telecommunications (Cell phone ASP)
  • Tracking Filters
  • Harmonic Analysis
  • Noise Analysis
  • Data Communication
  • Wireless Applications
  • Telemetry
  • Lowpass Responses Bandpass