NJW1124数据手册Nisshinbo中文资料规格书

描述 Description

NJW1124 是一款内置了可视门铃等免提设备所需的放大器、衰减器、电平检测器、控制电路的IC 。由线路放大器、带有静音功能话筒放大器、听筒放大器、发送/接收衰减器、背景噪声监测器、电平检测器构成，最适于对讲接听设备。设定的外接零件常数小，故所有电容都可以用陶瓷电容来构成。

应用

• 可视门铃

• 对讲机、热水器遥控

• 会议系统

• 无线设备

• 安防系统

特性 Features

• Operating voltage range 2.9 to 4.5V
• Force to Receive, Transmit, or Idle modes
• Mode ñwatching monitor
• Attenuator gain range between Transmit and Receive 52dB
• Microphone amplifier with mute function
• Background noise monitor for each path
• Volume control range 40dB
• 4-point signal sensing
• Microphone and Receive Amplifiers pinned out for flexibility
• Package Outline SSOP32APPLICATION
•Video Door Phone
•Conference System
•Wireless Application
•Security System