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DAC8564: VIO=1.8V support

Yoshikazu Kawasaki
Intellectual 741 points
Part Number: DAC8564
Other Parts Discussed in Thread: DAC80504

Tool/software:

Hello,

My customer is considering to use DAC8564, but the datasheet says IOVDD=1.8V(min) which means VIO=1.8V(typ) power supply can't meet the spec to think about the variation of the external power source.  Is it your intention?  Would you please tell me the background of the spec of IOVDD=1.8V(min) that you can't support 1.7V(min)?

I see many of your products also support only 1.8V(min), so I can't suggest other devices.  If you can make it to 1.7V(min) or so, there would be many more applications since many applications these days use VIO=1.8V(typ).  It means we miss many applications.

Best Regards,

Yoshikazu Kawasaki

  • +1
    TI__Mastermind 32808 points

    Hi Kawasaki-san, 

    It is possible that the the DAC8564 could operate at a IOVDD < 1.8V, but we wouldn't be able to guarantee this across all operating conditions or from device to device. We have verified with a minimum of 1.8V. 

    Could your customer consider the DAC80504? It has a min VIO level of 1.7V.

    Best,

    Katlynne Jones

  • 0 in reply to Katlynne Jones
    Intellectual 741 points

    Hello Katlynne-san,

    Thank you very much for your comments.  I expected you might be able to support VIO down to 1.7V or so, but it seems we have to propose alternatives like DAC80504 as you mentioned,  I hesitate to say this, but IOVDD=1.8V(min) is a halfway spec.

    Best Regards,

    Yoshikazu Kawasaki

  • 0 in reply to Yoshikazu Kawasaki
    TI__Mastermind 32808 points

    Hi Kawasaki-san, 

    Many of our newer devices have a lower VIO minimum to support 1.8V logic. This part was released in 2007 and I don't think it was as common in the DAC team at the time to support logic levels below 2.7V.

    Please let me know if the DAC80504 does not meet your customer's requirements and I can help find another device. 

    Best,

    Katlynne Jones