Hello!
The documentation for the PCM1794 output filters uses IC LT1028.
Please help me to replace it with OPA2132 or another suitable amplifier. It is required to use it for a circuit with single supply. Battery 12v.
Thank you!
Gennadiy,
In order to convert the dual supply application to a single supply, you must create a mid-supply buffer and use it to drive the non-inverting inputs - see below. Also, if the R+ and R- DC level is other than 6V, you may also have to AC couple the inputs with large coupling caps as shown on the left below in the red circles.
Gennady,
The value of the coupling capacitor depends on several factors like input resistors, maximum distortion and required gain - please review the following link:
http://www.learningaboutelectronics.com/Articles/What-is-a-coupling-capacitor
Assuming an inverting gain of 1, you should use 10uF or higher value caps - see below.
