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HDC1080: HDC1080/50 failures

Part Number: HDC1080
Other Parts Discussed in Thread: HDC1050,

Hi,

I have had several cases where a HDC1080 or HDC1050 humidity sensor has failed. The failed sensors have a low resistance short between VCC and GND, and in one case the I2C SCL pin also had a short circuit to ground.

These sensors are mounted on bare prototype PCBs that are used for SW development so ESD is certainly a possible cause as is physical damage to the sensor element (although no damage to the sensor is visible).

Can minor damage to the exposed sensor surface lead to a short circuit in the sensor?

  • Hi Jussi,

    I haven't seen this phenomenon before from sensor damage.  However, as you mentioned, it may point towards electrostatic discharge, which can be damaging the sensor.  I'll double check with design if this type of damage through product mishandling.

    Best Regards,

    Matt