The selectable lowpass/bandpass filter IC Is a CMOS chip that can be configured for either a lowpass or a bandpass filter. 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 switchedcapacitor filters and no external components (except for decoupling capacitors) are required, Only an external 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 1.0 volts, making the device ideal for portable applications. There is also an on chip op amp that can be used to provide additional gain.


  • 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


  • Spectrum Analyzers
  • General Purpose Systems
  • Portable Systems
  • Anti-Alias Filters
  • Reconstruction Filters
  • Telecommunications
  • Tracking Filters
  • Harmonic Analysis
  • Noise Analysis
  • Data Communication
  • Wireless Applications