I need to interface a minimum of 32 (maximum of 64) 14-bit ADCs to an Intel PXA255 XScale processor. Each ADC is connected to an individual linear Hall Effect sensor. The sensors are distributed over an area of approx 2 sq metres. I want an ADC near each Sensor (for signal integrity reasons), so multi-channel ADCs are not suitable.
The PXA255 has I2C and SSP ports available.
Does anyone have any reccomendations on how I might best do this (taking into account signal integrity, loading, addressing issues,etc) ?
RR