I'm looking for a way to generate a high speed PWM signal into a high impedance input gate driver IC. This would be used to replace a lab bench waveform generator. Preferably I would use something like an Arduino so I can use also use the ADC and do my feedback digitally. Unfortunately Arduino does not have that combination of frequency and resolution.
The next best option would be a PWM controller that can be controlled with something like I2C so I could just control it with something like an Arduino.
I've looked high and low, but so far I'm striking out. I need at least 10 bits of resolution because my duty cycle is low (3-5%) and is relatively sensitive to small changes.