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PCA9306: PCA9306 Voltage

HARI T O1
Expert 1215 points
Part Number: PCA9306

Dear Team,

I know that the PCA9306 voltage range is 1.2-V to 3.3-V VREF1 and 1.8-V to 5.5-V VREF2 .

After ordering the part I realized that my VREF1 will go up to 3.6V.

If I connect VREF1 to 3.6V will it damage the chip or will it function as expected.

Regards

HARI

  • 0
    Guru 243920 points

    Where exactly did you get that 3.3 V limit from?

    See the recommended operating conditions table in the datasheet. 3.6 V will work fine.

  • 0 in reply to Clemens Ladisch
    Expert 1215 points

    Hi Clemens

    I got this from the datasheet 1st page.

    the maximum value of Vref1 shown here is 3.3V that is why I am confused whether i can give 3.6V to Vref1 or not.

    Regards

    HARI

  • +1 in reply to HARI T O1
    TI__Genius 15345 points

    Hi Hari,

    You can actually use both sides from 0-5.5V. The only recommendation with this device is that VREF1 is from 1.2V to VREF2-0.6 V. This will give you the best performance with this device.

    You can actually run VREF1 within the VREF2-0.6V to VREF2 range, you will just see some losses in performance. I believe the speed suffers a little bit.

    You even can have VREF1>VREF2. But once again you will see some losses in performance.

    You definitely can use VREF1 at 3.3V.

    Best,

    Chris