SSM2167
Info: : PRODUCTION
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SSM2167

Low Voltage Microphone Preamplifier with Variable Compression & Noise Gating

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $1.41
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
Additional Details
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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 −40°C to +85°C.

Applications

  • Desktop, portable, or palmtop computers
  • Telephone conferencing
  • Communication headsets
  • Two-way communications
  • Surveillance systems
  • Karaoke and DJ mixers
  • Part Models 2
    1ku List Price Starting From $1.41

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    Documentation

    Documentation

    Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
    SSM2167-1RMZ-R7
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    SSM2167-1RMZ-REEL
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    Part Models

    Product Lifecycle

    PCN

    May 15, 2012

    - 10_0006

    Halogen Free Material Change for mini SOIC Products

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    Part Models

    Product Lifecycle

    PCN

    May 15, 2012

    - 10_0006

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    Halogen Free Material Change for mini SOIC Products

    Software & Part Ecosystem

    Software & Part Ecosystem

    Evaluation Kit

    Evaluation Kits 1

    EVAL-SSM2167

    SSM2167 Evaluation Board

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    EVAL-SSM2167

    SSM2167 Evaluation Board

    SSM2167 Evaluation Board

    Product Detail

    The AN-583 application note provides a basic explanation of how the board is set up and how to use it to evaluate the SSM2167. This document is only a supplement and makes several references to figures contained in the product data sheet. The current data sheet for the SSM2167 is available on-line.


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