手册上描述Differential Current Output: 7.8 mA p-p
The current of the PCM1794A device on each of the output pins (I OUT L+, I OUT L–, I OUT R+, I OUT R–) is 7.8 mA p-p
at 0 dB (full scale). Use Equation 1 to calculate the voltage output level of the I/V converter (Vi).
Vi = 7.8 mA p–p × R f
where
• R f is the feedback resistance of I/V converter
但是我在使用过程中,选择反馈电阻为130R时,理论计算VI=7.8MAX130R=1.014V,但是实际测试不同板卡芯片VI的值是不同的,范围从0.97V到1.014V,初步怀疑是芯片输出电流有误差,请大佬帮忙分析下原因,谢谢!