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TLV320DAC3100: TLV320DAC3100IRHBR - Application Issues

wei hu
Prodigy 20 points

Part Number: TLV320DAC3100

Dear TI Team,

Excuse me!

Please find attached information regarding a suspected application issue recently encountered by our company. ABA cross-verification indicates it is related to failed ICs, but no defects have been found on the desoldered components themselves.

No failure modes can be observed on the failed ICs directly. The only symptom is that the buzzer produces no sound when the IC is mounted on our test station circuit. Our team is still investigating the root cause.

Could you please help check whether there are potential risks in our circuit design or production process that may cause IC failures? Alternatively, can we send the ICs to you for analysis and confirmation?

fa new form-TI-TLV320DAC3100IRHBR.doc 

  • 0
    TI__Mastermind 22066 points

    Hello,

    When this issue occurs, is SPKVDD stable at 5V? Can you do a full register dump on the failing units when the issue occurs? I will check if any interrupts are triggering to cause the shutdown.

    One suggestion we have is to AC couple unused analog inputs to GND, as opposed to pulling down via a resistor. Although this is not likely to fix the issue.

    Best,

    Garret

  • 0 in reply to Garret Godfrey
    TI__Mastermind 22066 points

    Can you also send an image of the top side of a passing unit?

  • 0
    Prodigy 20 points

    Hi Garret，

    We are checking whether SPKVDD stays stable at 5V. Please wait for our update.

    About full register dump on the failing units when the issue occurs, our current‑day test equipment cannot support this function. Could you inform us which device can read internal IC data?

    In addition, our team is confused about the operating procedure for this suggestion. Please provide detailed instructions on how to implement it. Thank you!

  • 0 in reply to Garret Godfrey
    Prodigy 20 points

    We are checking whether SPKVDD stays stable at 5V. Please wait for our update.

    About full register dump on the failing units when the issue occurs, our current‑day test equipment cannot support this function. Could you inform us which device can read internal IC data?

    In addition, our team is confused about the operating procedure for this suggestion. Please provide detailed instructions on how to implement it. Thank you!

  • 0 in reply to wei hu
    TI__Mastermind 22066 points

    How do you write I2C to the devices? You should be able to read back with this same method.

    Is this a unit from the passing group? Do all the devices you have display the same top side marking?

  • 0 in reply to Garret Godfrey
    Prodigy 20 points

    We perform I2C write operation following standard I2C‑bus protocol.Transmit the slave address with write bit, register address and target register value.

    But our machine cannot read the data , so we can only rely on functional testing to determine whether the circuit is in good condition.

    This issue every time production will happen, but this time so much.

    So we want to figure out whether the problem lies with the application or the writing program.

  • 0 in reply to wei hu
    TI__Mastermind 22066 points

    This device has a number of read-only flags that indicate the type of error that could be causing this issue of losing the output.