HomedatasheetSSM2166SZ

SSM2166SZ Datasheet

Audio ICs
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Description

The SSM2166SZ integrates a complete and flexible solution for conditioning microphone inputs in 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 and can be varied from 1:1 to over 15:1 relative to a user-defined rotation point; signals above the rotation point are limited to prevent overload and to eliminate popping. 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. This results in optimized signal levels prior to digitization, thereby eliminating the need for additional gain or attenuation in the digital domain that may add noise or impair accuracy of speech recognition algorithms. The compression ratio and time constants are set externally. A high degree of flexibility is provided by the VCA gain, rotation point, and noise gate adjustment pins. SSM2166SZ 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) SSM2166SZ 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
Features

Parameters

[{"Name":"THD plus Noise","Value":"0.25 %"},{"Name":"Operating Supply Voltage","Value":"4.5 V to 5.5 V"},{"Name":"Supply Current","Value":"7.5 mA"},{"Name":"Maximum Operating Temperature","Value":"+ 85 C"},{"Name":"Audio - Load Impedance","Value":"75 Ohms"},{"Name":"Minimum Operating Temperature","Value":"- 40 C"},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""},{"Name":"","Value":""}]

Manufacturer information

ON SEMICONDUCTOR

ON Semiconductor - ON Semiconductor (Nasdaq: ON) is driving energy efficient innovations, empowering customers to reduce global energy use. The company offers a comprehensive portfolio of energy efficient power and signal management, logic, discrete and custom solutions to help design engineers solve their unique design challenges in automotive, communications, computing, consumer, industrial, LED lighting, medical, military/aerospace and power supply applications. ON Semiconductor operates a responsive, reliable, world-class supply chain and quality program, and a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions.

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