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DRV2605L-Q1: Internal leakage

martin
Prodigy 80 points
Part Number: DRV2605L-Q1

When I supply 3.3V to SDA/SCL pin, I can see that there is a leakage voltage close to 1V at VCC pin. Are they connected internally?

  • 0
    TI__Mastermind 22935 points

    Hi Martin,

    There probably is some kind of ESD protection circuit/diode between the two that is creating the dip you are seeing. However I would strongly advise against applying the 3.3V before VDD (there is no VCC on this part) is stable. The absolute maximum of the I2C pins is VDD+0.3V which is 0 when you first apply the 3.3V to the I2C pins. Try applying VDD first and then applying the SDA/SCL voltage.

    Best regards,

    Jeff McPherson