FEATURES
Complete microphone conditioner in a 14-lead SOIC package Single 5 V operation Adjustable noise gate threshold Compression ratio set by external resistor Automatic limiting feature—prevents ADC overload Adjustable release time Low noise and distortion Power-down feature 20 kHz bandwidth (±1 dB) APPLICATIONS
Microphone preamplifiers/processors Computer sound cards Public address/paging systems Communication headsets Telephone conferencing Guitar sustain effects generators Computerized voice recognition Surveillance systems Karaoke and DJ mixers GENERAL DESCRIPTION
A low noise, voltage-controlled amplifier (VCA) provides a gain that is dynamically adjusted by a control loop to maintain a set compression characteristic. In the 1:1 compression setting, the SSM2166 can be programmed with a fixed gain of up to 20 dB; this gain is in addition to the variable gain in other compression settings. The input buffer can also be configured for front-end gains of 0 dB to 20 dB. A downward expander (noise gate) prevents amplification of noise or hum.
Analog Devices
