Low Voltage Microphone Preamplifier With Variable Compression And Noise Gating

The SSM2167 is a complete and flexible solution for conditioning Microphone inputs in personal electronics and computer Audio systems. It is also excellent for improving vocal clarity in com- munications and public address systems. A low noise voltage controlled Amplifier (VCA) provides a gain that is dynamically adjusted by a control loop to maintain a set compression characteristic. The compression ratio is set by a single resistor and CAN be varied from 1:1 to over 10:1 relative to the fixed rotation point. Signals above the rotation point are limited to prevent overload and to eliminate popping. A downward expander (noise gate) prevents amplification of background noise or hum. This results in optimized signal levels prior to digitization, thereby eliminating the need for additional gain or attenuation in the digital domain. The flexibility of setting the compression ratio and the time constant of the level detector, coupled with two values of rotation point, make the SSM2167 easy to integrate in a wide variety of Microphone conditioning applications.
The device is available in a 10-lead MSOP package, and is guaranteed for operation over the extended industrial temperature range of 40C to +85C.
Applications Desktop, portable, or palmtop computers Telephone conferencing Communication headsets Two-way Communications Surveillance systems Karaoke and DJ mixers
Data Sheet, Rev. C, 11/07
By Analog Devices, Inc.
SSM2167 's PackagesSSM2167 's pdf datasheet

SSM2167 Pinout, Pinouts
SSM2167 pinout,Pin out
This is one package pinout of SSM2167,If you need more pinouts please download SSM2167's pdf datasheet.

SSM2167 Application circuits
SSM2167 circuits
This is one application circuit of SSM2167,If you need more circuits,please download SSM2167's pdf datasheet.

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