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TLV320AIC3120: DIN status

Michael Jeong1
Expert 2600 points
Part Number: TLV320AIC3120

Hello Expert,

Could you tell me what the impedance (this pin to ground) or status (Floating, Pull-down, etc) of DIN pin is when TLV320AIC3120 is not powered?

Because this pin is connected to the SoC and pulled-up (10kohm through 3.3V), 0.85V is confirmed when the power is not applied to the TLV320AIC3120.

At this time, SoC was power up.

This pin is bootstrap function of the SoC and has a multi function.

In SoC, it should be recognized as 3.3V at the time of initial booting, but it is currently becoming an issue. please check.

Best regards,

Michael

  • 0
    TI__Mastermind 29745 points

    Hi,

    I'm seeing low ~0V when not powered and when power is applied it goes up to 3.3V. I added a ~2K pullup to 3.3V on DIN pin.

    Normally case like this is due to DIN is connected somewhere else and not fully powered down.

    Regards.