Wolfson WM3100立体声2VRMS线驱动方案
Wolfson公司的WM3100是高性能立体声2VRMS线驱动器,具有极好的音频性能.两个可编程的放大器能驱动各种负载,支持单端和差分输入配置,A加权的SNR为108dB, THD+N为-95dB,动态范围108dB,固定增益6.4dB,主要用在数字电视,DVD,蓝光DVD,STB,和游戏机.本文介绍了WM3100主要特性,方框图, 外部元件连接框图以及标准板电路图和材料清单(BOM).
The WM3100 is a high performance stereo 2VRMS line driver with ground referenced outputs.
The device is ideal for cost-sensitive applications requiring line level outputs, minimal external components and small PCB area. The WM3100 offers excellent audio performance. The two high performance amplifiers are capable of driving a wide variety of loads. The device supports single-ended or differential input configurations. The input and feedback resisitors around both amplifiers are integrated within the WM3100, giving a high impedance input and a fixed signal gain of +6.4dB.
An on-board charge pump is provided to generate the negative supply for the ground-referenced drivers; the charge pump requires only two external capacitors for normal operation.
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