SSM2167 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

SSM2167
Manufacturer

ADI
ChipWorker Part#

CW389419760
Description

Low Voltage Microphone Preamplifier with Variable Compression & Noise Gating
Documentation

Datasheet

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SSM2167 Specifications

Attribute	Attribute Value

Part Number	SSM2167
Manufacturer	ADI
ChipWorker Part#	CW389419760
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
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
### Features and Benefits
Complete microphone conditioner in a 10-lead package
Single 3 V operation
Low shutdown current < 2 μA
Adjustable noise gate threshold
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Adjustable compression ratio
Automatic limiting feature prevents ADC overload
Low noise and distortion: 0.2% THD + N
20 kHz bandwidth
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- Vacuum packed
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- Anti-vibration foam
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