SSM2167

Data Sheet Low Voltage Microphone Preamplifier with Variable Compression and Noise Gating SSM2167 FEATURES Complete microphone conditioner in a 10-lead package Single 3 V operation Low shutdown current < 2 µA Adjustable noise gate threshold Adjustable compression ratio Automatic limiting feature prevents ADC overload Low noise and distortion: 0.2% THD + N 20 kHz bandwidth APPLICATIONS Desktop, portable, or palmtop computers Telephone conferencing Communication headsets Two-way communications Surveillance systems Karaoke and DJ mixers GENERAL DESCRIPTION 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 communications 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 a...