MSSCSA - Single Chip Spectrum Analyzer Print E-mail
The MSSCSA is a single chip 1/6th octave-wide 6 band spectrum analyzer whose center frequencies are controlled by a single master clock. The center frequencies are set at 1.12246, 1.2599, 1.4142, 1.5874, 1.78179 and 2 (normalized).  The sample to corner is 25:1 for the 2 Hz normalized output and 44.545:1 at the  1.122 Hz normalized output. The MSSCSA's 1.178179 Hz output is @ MHZ ( Clock at 25 MHz). Multiple MSSCSA can be connected for spectrum analysis by taking the master clock of the high frequency filter and dividing by 2..

The MSSCSA includes two uncommitted op amps for adding additional fixed gain for microphone or other low level applications. A digitally programmable gain stage provides 0, 10 or 20 dB of gain. The PD pin selects power down, low power for ultrasonic applications and regular power for at 2 MHz frequency operation. The MSSCSA is fabricated in 0.6 um CMOS process for low power consumption and operation from 3.0 to 5.5 VDC



  • Selectable Power Modes
  • Regular Power Consumption: 17 mA at +5V
  • Low Power Consumption: 6 mA at +5V
  • Power Down Mode
  • Operates from 3.0 V to 5.5 VDC
  • Six 6 pole Bandpass filters in one package
  • Digitally controlled gain stage
  • Two Uncommitted Op Amps
  • No Microprocessor Needed


  • Real-Time Spectrum  Analysis
  • Audio and Ultrasonic Analysis
  • Vibration Analysis


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