Logic Level for AD5370 working with a 3v3 Microcontroller

This might be a bit specific and probably a bit offtopic, but here it goes. I am trying to use AD5370 as my SPI downstream device with Teensy 4.0 a 3v3 Logic Level Microcontroller. According to the AD5370 documentation, it can work at 2.5 V LVTTL-compatible when operating from a 2.5 V to 3.6 V DVCC supply.

I have been previously powering my AD5370 with a DVCC of 5.0V, which is in the recommended range of 2.5V-5.5V. I have been reading about the strict 3v3 limit of teensy. Do you think

  • I need a logic level converter to work with Teensy 4.0?
  • Or can I get away with supplying my AD5370 with 3.6V on the DCC line, and common ground both devices?

Top Replies

    •  Analog Employees 
    Dec 16, 2020 +1 verified

    Hi ,

    With Teensy's logic supply = 3.3V and AD5370's DVcc = 3.6V, their logic levels should be compatible. Please review the table below, hopefully I used the correct table for the Teensy.…