Their main difference is resolution one delivers 16 bit the other module 12 bit.
Although the 12 bit version is cheaper and has a way easier to solder footprint, I choose the 16 bit version.
The ADC-16 is a dual 16 bit, serial, analog to digital converter, using two AD7685's.
There is no manual adjustment to set the A to D range. It is not needed to obtain excellent resolution in the MSA and VNA systems. Each ADC will digitize its input of 0 to 5 volts to a bit value of 0 to 65535 bits. This equates to 76.3 uv per bit.
Both A/D's will capture, and clock out their data simultaneously.
|ADC 16 rev A|
Spectrum analyzer Part I Controller board build notes
Spectrum analyzer Part II Phase Detector
ADC 16 Slim module