I have a project in which I am using a Contact Image Sensor. I receive an analog signal at 4 MHz which represents the color of a pixel. I have to transform it into a digital signal of 8 bits ( this resolution is enough for me ). Then, I want to save it and to transmit it to the computer. The resolution of a page can reach 35 Million of pixels, that represents 35 Mo.
I am looking for a discovery kit (STM32F) because I am totally new in this field. I didn't find any boards with enough storage. Does it exist or do i need to use an external storage ? (USB key, Memory card ...). Is it simple to interface ?
For example, I find this board : http://www.farnell.com/datasheets/1868811.pdf which seems to be interesting but they are 3 ADC at 2.4 Msps. I know that we can combine them to reach 7.2 Msps but I don't know if it is the best and the easiest way to proceed. Would it be better to use a faster ADC ?
Thank you for your consideration and your help.