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TPD1E10B06: ESD Diode problem

minoru takeuchi
Prodigy 20 points
Part Number: TPD1E10B06

I am developing a product using TPD1E10B06DPY,
High temperature and high humidity (65°C 98%) operation test, problem occurred at about 80Hr.

I measured both ends of the diode where the problem occurred with a DMM,
The resistance value went from 10kΩ to 50kΩ.

The operating conditions were 1.25V on 1Pin and GND on 2Pin.
The diode is turned on once every 5 minutes for 0.7 seconds.

Q1. What is the guaranteed operation range for high temperature and high humidity?
Q2. Is it possible to analyze failed elements?
Q3. I measured the resistance value of an unused product and it was OPEN. Is this correct?

  • +1
    TI__Expert 5290 points

    Hi Minoru,

    The guaranteed operation range for free air temperature is -40 to 125°C. For humidity, I do not have a clear answer. I was able to find the MSL rating of the device, which is Level-1-260C-UNLIM. I could only find a document that expresses what this means for the floor life of the device at various temperatures and humidity levels. Here is that document for your reference: MSL Ratings and Reflow Profiles (Rev. A)

    In the lab, we typically use a curve tracer to verify the diode's integrity. When connected to the machine, if the diode is behaving as expected, we will see the DC-IV curve of the diode. If it has failed, it can fail either short or open (by experience, more commonly short). The resistance read from input to ground should be a high impedance signal, which according to what you've told me means the diode has not failed. The diode will show low impedance when it is broken down to a high enough voltage.

    Yes, this is correct. The open you measured means high impedance, which makes sense because the diode has not been broken down.

    Could you please explain more on the use case here? What do you mean by turning on the diode, and why do you only turn on the diode for 0.7 seconds? The diode has a clamping voltage of 10V, which means the diode will not turn on with the 1.25V input.

    Best Regards,

    Josh Prushing

  • +1
    Prodigy 20 points

    Thank you for your reply.

    We use that diode in the input line of an instrumentation amplifier.
    Our circuit is activated once every 5 minutes and the instrumentation amplifier's input is ON for 0.7 seconds. At that time, the voltage on the input line is 1.25V.
    When the circuit is not active, the instrumentation amplifier's input is 0V.

    Regards,

  • +1 in reply to minoru takeuchi
    TI__Expert 5290 points

    Hi Minoru,

    Thank you for the additional information!

    Did you have any questions on my comments above, or any additional questions on TPD1E10B06DPY?

    Best Regards,

    Josh Prushing

  • +1 in reply to Josh Prushing
    Prodigy 20 points

    We are using the TPD1E10B06DPY 

    PIN2 - SIGNAL

    PIN1 - GND

    Is this OK ? or Any problem ?

  • +1 in reply to minoru takeuchi
    TI__Expert 5290 points

    Hi Minoru,

    There are no problems with that setup!

    Best Regards,

    Josh Prushing