MSFS1-6 - Selectable Lowpass/Bandpass Filter Print E-mail

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 switched-capacitor filters and no external components (except for decoupling capacitors) are required, Only an external CMOS level clock is needed.


A four input multiplexor and externally selectable gain setting pin, along with a power down and clock to corner ratio select pin are included in the 16 pin version. An 8 pin version is also available for PC board area savings. Typical current consumption is as low as 200 uA and the minimum operating voltage is 2.7 volts, making the device ideal for portable applications. MSFS3, MSFS4 and MSFS6 are low current, lower frequency versions.



  • Six Filter Types In One Package
  • No External Components
  • Switched-Capacitor Filters
  • Low Power Operation
  • Low Voltage Operation
  • Input Multiplexor
  • Adjustable Gain 0, 10 or 20 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


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