Some measurements of the ADC, with SE (RCA) input:
Actually quite close to the datasheet:
This is
Actually quite close to the datasheet:
This is
Ran a test with together with amp, everything looks good so far 🙂
Hey there, may I ask what inductor you are using for the output as well as the output capacitor? I really like the small inductors you used and I wonder if class H is disabled, will they get really hot at 45V?
Hi, the type is 7w14a-100M, I found them sold as 20pcs lot on Aliexpress.
They of course get hot and the chass H helps a lot to keep them cooler. I do not have exact measurements. But when I ran the amp at 1kHz sine 100W/ch for several minutes - they maybe heat up to around 50-60 degC.
Wow I am also using the same inductors for my design, but from a different source. I also got them from aliexpress too since there were none on Digi key. I am surprised that you still ended up with 10uh inductors, since the chip supports switching at 2.1 Mhz. Is the efficiency of the switching much lower at 2.1mhz compared to something like 400khz that most TI class d amps run at?
Well, I would say going for 10uH was a mistake because it is too much for 2 MHz PWM, there are noticeable signal distortion at frequencies higher than 480kHz. I still have plans to try 2.2uH + 2MHz. So now I can't comment of the gain in efficiency/THD.