URGENT need of ADC


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,


  • 0
    •  Analog Employees 
    on Nov 1, 2011 3:44 AM over 8 years ago

    Hello Emilien,

    It would be helpful If you can share your throughput, supply, input range, reference voltage, package, etc. requirements to further narrow down the search.

    Besides AD7946, the AD7942 is another lower power option. These ADCs have min SPI CLK period of 14ns (7ns high and 7ns low) in chain mode. So, they can tolerate SPI CLK at 10MHz. The AD7949 is also option If you want the higher channel count. We also have number of high-resolution >=16-bit SAR ADCs that could potentially meet your needs.


  • 0
    •  Analog Employees 
    on Aug 2, 2018 4:29 PM over 2 years ago
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin