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BOOST-DRV8711 Logic Level

user4755703
Prodigy 20 points
Other Parts Discussed in Thread: BOOST-DRV8711, DRV8711

Hi 

I've recently purchased the BOOST-DRV8711 to evaluate the DRV8711

On the board it says 3.3 on the power connector. Does this mean that i need to use logic-level shifters if I want to interface with an AVR running at 5V?

In the data sheet for the DRV8711 (page 5, section 6.1) it says that Digital pin voltage is between -0.6 to 5.5V.

Is it the Gate-to-Source Threshold Voltage of the MOSFET that is setting a limit at 3.3v?

Niklas

  • 0
    TI__Guru** 114905 points

    Hi Niklas,

    user4755703 said:

    On the board it says 3.3 on the power connector. Does this mean that i need to use logic-level shifters if I want to interface with an AVR running at 5V?

    In the data sheet for the DRV8711 (page 5, section 6.1) it says that Digital pin voltage is between -0.6 to 5.5V.

    The 3.3V on connector J1 is provided from the Launchpad. The 3.3V is connected to the potentiometer and the LEDs.

    If you want to use an AVR at 5V, you can connect the AVR GPIOs directly to the control signals of the DRV8711.

    user4755703 said:
    Is it the Gate-to-Source Threshold Voltage of the MOSFET that is setting a limit at 3.3v?

    The gate to source voltage of the FETs are 20V.