Other Parts Discussed in Thread: DRV135, ISO7710, TINA-TI
Hi,
In the last post "OPA134: Useful opam'p for audio tone from microcontroller", was unfinished and now I attach a new and improved design with Single-Channel Digital Isolator ISO7710F for avoid problem for use no common ground, increased value of R6 to 100 ohm in low pass filter in order to obtain cutoff frequency of 16 kHz about and decreased R9 to 10ohm for lower limit on the volume.
I want to know which is the volume range or how I can calculate.