I find the SiLabs 8051s are great analog building blocks. I have not used that part. I have used other parts some up to 100mips. They have good ADCs and good DACs. I have worked on a line of products that have a 10 pin "analog" IC in it. But really it has a 10 pin 8051 from SiLabs.
In this case we read in analog voltages, did the math, then output analog (audio) so fast that it looked 'analog'.
8051s are common in modems, radios, TVs, and places where you would not think a 'computer' is being used.