datasheet里面关于音频输入的引脚描述如下——
LEFTINM: Left channel negative differential input. Impedance must be matched to LEFTINP. Connect the left input to LEFTINM when using single-ended inputs.
LEFTINP: Left channel positive differential input. Impedance must be matched to LEFTINM. AC ground LEFTINP near signal source while maintaining matched impedance to LEFTINM when using single-ended inputs.
我想请教一下,如果单端输入时前面是DAC+LPF(例如PCM510xA),那LEFTINP要如何交流接地同时保持阻抗匹配?PCM510xA的Load impedance: 1 kΩ(min).
PCM510xA应用图: