URGENT need of ADC

Dear,

i urgently need  to find an ADC reference which answer to this need:

- Resolution >12bits

- Number of channels >1

- SPI interface with daisy chain mode

- SPICLK 10Mhz tolerant

I have already found the AD7946, but it seems to not tolerate an SPI CLK at 10mHz (with reading on CLK's rising edge).

Indeed,  "thsdo">ou=5ns  and "tdsdo"<or = 15ns,

Somebody have an idea?

Thank you for your attention.

Best regards,

Emilien