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Graphic Equalizer Display Filter -MSGEQ7

Graphic Equalizer Display Filter -MSGEQ7
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Graphic Equalizer Display Filter -MSGEQ7Graphic Equalizer Display Filter -MSGEQ7Graphic Equalizer Display Filter -MSGEQ7Graphic Equalizer Display Filter -MSGEQ7
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SKU:  PPCOM-10468
Part Number:  COM-10468
Brand:  SparkFun

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  (2 Reviews)

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.

Other than coupling and decoupling capacitors, no other external components are needed. The chip supply can be between 2.7 and 5.5 volts with 5 volts providing the best performance. The device has very low quiescent current (less than 1ma typical) for portable audio devices. the multiplexer is controlled by a reset and a strobe, permitting multiplexer readout with only two pins. The multiplexer readout rate also controls the decay time (10% decay per read), so no external pins are needed for this function.

Features:

  • Low Power Consumption
  • Only Two External Components
  • On Chip Ground Reference
  • Switched - Capacitor Filters
  • 3.3 or 5 Volts Operation
  • 20 dB of Gain
  • On Chip Oscillator
  • Output Multiplexer
  • Variable Decay Time
  • 8 Pin DIP Package

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Customer Reviews
Average Rating (2 Reviews):  
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Rating:  
Saves a lot of external components!
Thursday, 25 September 2014  |  Roger

For a simple application using Arduino to drive a graphic equalizer display, this little chip saves a lot of time and effort. Taking the output of an electret microphone (also from Proto-Pic) through an LM358 Op-Amp, gives enough input to the MSGEQ7 to us

 

2 of 2 people found this review helpful.


Rating:  
Simple to use with Arduino
Sunday, 11 May 2014  |  Noddy

A great chip, only needs a few components, all available from Proto-Pic. I soldered the circuit shown on the datasheet on a small offcut of veroboard as it acts as an input to the Arduino and does not need to be changed. I can then breadboard the output

 

2 of 2 people found this review helpful.

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