SSM2167Z-EVAL 评估板

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.

SSM2167Z-EVAL 应用

Desktop, portable, or palmtop computers
Telephone conferencing
Communication headsets
Two-way communications
Surveillance systems
Karaoke and DJ mixers

SSM2167Z-EVAL 特点

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

SSM2167Z-EVAL 功能框图

SSM2167 Pin Configuration Diagram

其他图表

SSM2167Z-EVAL 技术指标

Micophone Driver

Mono

Supply Current

5mA

SSM2167 芯片订购指南

产品型号	产品状态	封装	引脚	温度范围
SSM2167-1RM-REEL	量产	10 ld MSOP	10	工业
SSM2167-1RMZ-R7	量产		10	待定
SSM2167-1RMZ-REEL	量产	10 ld MSOP	10	工业
SSM2167Z-EVAL	量产	评估板		工业