Graphic Equalizer Display Filter - MSGEQ7

The Sparkfun Graphic Equalizer Display Filter - MSGEQ7 is a high-functioning seven band graphic equalizer IC. This compact CMOS chip divides the audio spectrum into seven distinct bands; 63Hz, 160Hz, 400Hz, 1kHz, 2.5kHz, 6.25kHz and 16kHz. The seven frequencies are peak detected and multiplexed to the output, providing a DC representation of the amplitude of each band. This product requires no external components to select the filter responses, with only an off-chip resistor and capacitor needed to select the on-chip clock oscillator frequency. The filter center frequencies track this frequency, making it highly versatile and reliable.

The MSGEQ7 chip is designed with simplicity and efficiency in mind. Apart from coupling and decoupling capacitors, no other external components are required. The chip supply can range between 2.7 and 5.5 volts, with 5 volts providing optimal performance. This device boasts a very low quiescent current (less than 1ma typical), making it ideal for portable audio devices. The multiplexer is controlled by a reset and a strobe, allowing multiplexer readout with only two pins. The multiplexer readout rate also controls the decay time (10% decay per read), eliminating the need for external pins for this function.

Key features of the MSGEQ7 include low power consumption, the need for only two external components, an on-chip ground reference, switched-capacitor filters, the option for 3.3 or 5 volts operation, 20 dB of gain, an on-chip oscillator, output multiplexer, variable decay time, and an 8 Pin DIP package. These features make the MSGEQ7 a compact, versatile and efficient solution for audio spectrum division.

The Sparkfun MSGEQ7 is not just a chip, it's a tool for creating immersive sound experiences. It can be used in a variety of applications, from enhancing music playback on portable devices to professional audio mixing and editing. The on-chip oscillator and output multiplexer make it easy to control and fine-tune the audio output, while the variable decay time allows for dynamic sound adjustments. With its low power consumption and minimal need for external components, the MSGEQ7 is also an eco-friendly choice.

For more detailed information, please refer to the product page and datasheet available.