[Mixed Signal Integration]

Description
The seven band graphic equalizer IC is a CMOS chip that divides the audio spectrum into seven bands, 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz. The seven frequencies are peak detected and multiplexed to the output to provide a DC representation of the amplitude of each band. No external components are needed to select the filter responses. Only an off chip resistor and capacitor are needed to select the on chip clock oscillator frequency. The filter center frequencies track this frequency.

FEATUREs
   Low Power Consumption
   Only Two External Components
   On Chip Ground Reference
   Switched - Capacitor Filters
   3.3 or 5 volt Operation
   20 dB of Gain Typical
   On Chip Oscillator
   Output Multiplexor
   Variable Decay Time
   8 Pin Package

APPLICATIONs
   Portable Stereos
   Car Stereos
   Hi-Fi Stereos
   Spectrum Analyzers