(1)Now we find that the PCM6240 will attention the output with increase the input frequence, -6dB/oct
for example
input 1Vrms sine wave
Hz dB ( Frequence Response)
125 18
250 12
500 6
1k 0 Reference
2k -6
4k -12
8k -18
Input RC filter is OK, which register will affect it （-6dB/oct）
（2）What is the parameter(C&R) about the input pin(INP&INM) when simulate it with LTSPICE,or if we have the LTSPICE model about it?
