MSGEQ7 데이터 시트보기 (PDF) - Unspecified

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MSGEQ7

Seven Band Graphic Equalizer

Unspecified 

9/2004

Seven Band Graphic Equalizer

Data Sheet

Description

Features

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 repre-

sentation of the amplitude of each band. No external

components are needed to select the filter respons-

es. Only an off chip resistor and capacitor are

needed to select the on chip clock oscillator fre-

quency. The filter center frequencies track this fre-

quency.

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 multiplexor is con-

trolled by a reset and a strobe, permitting multi-

plexor readout with only two pins. The multiplexor

readout rate also controls the decay time (10% de-

cay per read), so no external pins are needed for this

function.

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

Absolute Maximum Ratings

Power Supply Voltage

Storage Temperature

Operating Temperature

+6V

-60 to + 150 C

0 to 70 C

20

00

63

160

400

1000

2500

6250

16000

Frequency Response

Web Site “www.mix-sig.com”

© 2004 Mixed Signal Integration 1

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