I bought a startech ST4200SUBM USB hub for my QA403. I put 7 V on the external power source pins and confirmed it converts it to 5V on the USB port. Opening it I see it uses a DC-DC switching converter chip (MT3905), which supposedly can output 4A, which surprises me a bit, since it’s a little SMD guy, but I’m pretty sure it’s good for the current the device needs.
I hadn’t thought about it being a USB 2.0 device. Spec sheet says so and it has a USB 2.0 hub chip in it sure enough.
Is USB 2.0 OK bandwidth-wise? I see mention of USB 3.0 but that seems more related to the power requirements.
Thanks !