Hi, I'm designing myself (well compiling from other people's designs) A USB headphone amplifier.
Hopefully the attached schematic for the digital end should all be fine (simply taken from both datasheets typical application diagram and joined together) however I have some brief questions.
For the PCM1794 it reccomends LT1028 opamps for the final stage of I/V 'because its input noise is low'. At £10 a pop though I was wondering if it'd be okay to swap in an opamp such as the AD8066. This is the opamp I'll be using for the analogue section.
Seccondly the PCM2706 outputs a 256FS SCK which is fine to input into the PCM1794 as is, however would it be worth sticking some sort of jitter removal chip in the middle? I was thinking along the lines of the PLL1705. I'd rather use this only if it will give a perceptable improvement however.
This is my first Digital project so I may have got some things completely wrong. Feel free to correct me and suggest improvements
Hopefully the attached schematic for the digital end should all be fine (simply taken from both datasheets typical application diagram and joined together) however I have some brief questions.
For the PCM1794 it reccomends LT1028 opamps for the final stage of I/V 'because its input noise is low'. At £10 a pop though I was wondering if it'd be okay to swap in an opamp such as the AD8066. This is the opamp I'll be using for the analogue section.
Seccondly the PCM2706 outputs a 256FS SCK which is fine to input into the PCM1794 as is, however would it be worth sticking some sort of jitter removal chip in the middle? I was thinking along the lines of the PLL1705. I'd rather use this only if it will give a perceptable improvement however.
This is my first Digital project so I may have got some things completely wrong. Feel free to correct me and suggest improvements
