Trying to interface an 1 Msps 16 bit adc with a stm32f4 using spi/dma. Is this possible at 1 Msps?

The problem is that the convert/chip-select pin needs to be asserted for about 700ns for the conversion to complete.

The NSS signal of the stm32f4 only is asserted a very short time, so that would not do.

Maybe use a timer to generate the convert pulse that somehow also triggers the spi transfer?

Can this be achieved?

And would that involve an interrupt every 1 microsecond?

Thanks in advance, Sietse

PS. The adc is microchip's MCP33131.

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