You might be surprised to learn that most amps and integrateds are still fully analog. “Class D” is an amplifier topology. The “D” does not stand for digital, and does not indicate any conversion of the incoming signal to 1s and 0s. Some class D amps do convert the signal to digital but the majority do not. The newer NAD integrateds do that if I’m not mistaken, but not the class D Marantz or Cambridge Audios — those are analog.
Yamaha makes some very high quality and great sounding, fully-analog class AB integrated amps within your budget. Check out the A-S2200.
Also, Belles, Sugden, and LFD immediately come to mind. There are many others as well.