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AFE11612-SEP: Logic thresholds when powered at 2.7V

Part Number: AFE11612-SEP

Hello : )

I'd like to interface this with a 2.5V bank on a Polarfire FPGA (the I/O's are less susceptible to latch-up with lower bank voltages). It's likely I'd power the device at 2.9V (so 0.2V higher than the 2.7V minimum supply).

Could you provide digital input and output characteristics at the 2.7V level? I'd just like to ensure it's compatible.

From the data sheet:

When IOVDD is 5V, the minimum high level input voltage is 2.1V

the minimum high level output voltage is 4.8V when sourcing 3mA

When IOVDD is 3.3V, the minimum high level input voltage is 2.2V

the minimum high level output voltage is 2.9V when sourcing 3mA

From this data I'd guess that with IOVDD at 2.7V, the high level input voltage would be around 2.3V? Would be awesome is it was still 2.2V.

Id also guess that the high level output voltage would be around 2.3V when sourcing 3mA ?

May need to consider just running the device at 3.3V and using level translators on the digital outputs.

Thanks for the help!

Adam

  • Hi Adam,

    Since we don't characterize the 2.7V IOVDD VIH data, I can't say for certain if the value is higher or lower than the 3.3V IOVDD. When testing the device on my setup, though, I see a similar input range of around 2.2V. 

    The VOH output with 2.7V and 3mA sourced current is around 2.38V.

    You should be able to run this device at the 2.7V IOVDD with little issue, though the specs at this voltage are not guaranteed like at 3.3V or 5V. 

    Let me know if you have any other questions about this device!

    Thanks,
    Erin

  • Thank you! : )