Part Number:PCM5121
PCM5121规格书上备注的:2Vrms FS (0dB) or 1Vrms FS (-6dB),意思是2Vrms=0dB,1Vrns=-6dB吗。
是否可以提供下换算公式
8.3.5.5 Analog Gain Control
Analog gain control can be selected between 2-Vrms FS (0dB) or 1-Vrms FS (–6 dB). Gain is controlled through hardware by the AGNS pin, and through software (SPI/I2C), Page 1, Register 2, D4(L-ch) / D0(R-ch)
Amy Luo:
您好,
FS (0dB)就是0dBFS,也就是满量程输入时输出是 2.1Vrms
-6dBFS输入时,输出是1Vrms
dBFS是将输入数字信号以满量程取20倍的log对数表示的输入信号