"high voltage analog input microcontroller with 512kByte RAM"

Hi Folks,

There seems to be a lack of microcontrollers that have large RAM capacity and high voltage analog inputs.  I am looking for a microcontroller that has specs including the following:

1. 16 channel or more, 16 bit or greater ADC(s) with a bipolar input of +/-10V or more at a per channel sample rate of >1200 S/s.
2. Optional VGA - prefer both gain and attenuation capability in the VGA.
3. 32 bit microcontroller with 512kByte or more of data RAM and 512kByte or more of flash memory in the microcontroller.
4. 100Mbits/s Ethernet communications or very fast SPI >10Mbits/s
5. 20 or more DIO bits.
6. Would like to be able to run RTOS or similar low weight real-time operating system.
7. A built-in real time clock calendar is highly desirable.

This is an industrial application; not low power.  It is the combination of these things that I am looking for.  Of course I can build a system using discrete components that can meet the need, but an integrated product would greatly simplify the hardware implementation of such a system.

Is there an integrated microcontroller product out there that can meet the above requirements?

Thanks,

Allan