hi all,
I was working on a DIY CD player based on PCM1794. The differential signals are input to a pair of dual opamps at I/V, then going to the buffer stage via a single opamp at each channel. The supply voltage is +/- 9V. The i/V stage uses a 2200pf cap and 820ohm resistor for each signal path. The power supply pins are decoupled by 100nf caps.
I have no problems using AD8620 and AD8599 or a pair of op627 at the I/V stage but once I place in a pair of AD8066, there will be no sound at the output.
However, if I were to place only one AD8066 at either channel, I will have output signal. If I were to place one AD8066 while I use any other opamps at the other channel, I will have output signal as well. However, it will never work with a pair of AD8066. I have tried 4 known working AD8066 but to no avail.
What am I missing here?
I was working on a DIY CD player based on PCM1794. The differential signals are input to a pair of dual opamps at I/V, then going to the buffer stage via a single opamp at each channel. The supply voltage is +/- 9V. The i/V stage uses a 2200pf cap and 820ohm resistor for each signal path. The power supply pins are decoupled by 100nf caps.
I have no problems using AD8620 and AD8599 or a pair of op627 at the I/V stage but once I place in a pair of AD8066, there will be no sound at the output.
However, if I were to place only one AD8066 at either channel, I will have output signal. If I were to place one AD8066 while I use any other opamps at the other channel, I will have output signal as well. However, it will never work with a pair of AD8066. I have tried 4 known working AD8066 but to no avail.
What am I missing here?
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