I have a project I'm about to start, and wanted to get some recommendations. My requirements aren't particularly complicated, but I thought that aside from my general google searches, I'd ask here.
I'm designing a custom board, and I want to use a microcontroller that's compatible with the Arduino IDE. I need to have either on-chip or as a cheap external peripheral a minimum of (3) 24-bit delta-signma ADC channels. I also am going to be using an EPD (e-paper) display, which will likely be SPI or I2C connected but I don't want a pre-built module. I have a display supplier that I regularly use, but I know they aren't going to provide a pre-made arduino library. I've seen some EPDs that have arduino libraries, but those display modules are a lot more expensive than what I'll be using (I guess that's one trade off).
For the micro, I'd like to go 16 bit with 16 or 32k of RAM, speed doesn't matter, but it does need to have a low-power (or ultra-low-power) mode that draws microamps when in standby (i'll be powering from 2 series 3V lithium coin cell batteries, and at the duty cycle I plan to operate, I shouldn't use more than a few hundred milliamp-hours per year).