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    BME680 Hardware Related Issue

    BME680 Hardware Related Issue

    adamalfath
    New Poster

    I'm designing a custom board with BME680, 6 in total, unfortunately all of them are experiencing the same problem. The I2C bus voltage level is dropped to around 0.77V, consistent on all boards. When I remove the sensor, the bus voltage back to VDD, and communication with several other I2C devices on the board is working normally. I'm using 100nF decoupling on both VDD & VDDIO, and 10k pull-up on the I2C bus to 3.3V. Also I think I tried my best to maintain the recommended reflow profile and ESD handling procedure.

    What could possibly be likely the main factor that makes this sensor fail? electrical? environment condition (storage/shipping)? something on the soldering process or maybe a bad batch from the distributor?

    6 REPLIES 6

    I found other forum post https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BSEC-BME680-i2C-bus-failure/m-p/47540 mentioned that the I2C bus is "collapsed", similar with my issue. It mentioned that the sensor has experienced extreme moisture conditions and that's maybe a clear factor on why the sensor got broke, but mine never goes outside the controlled environment, the humidity is always within the recommended state.

    BSTRobin
    Community Moderator
    Community Moderator

    Hi adamalfath,

    We cannot remotely confirm what problems have occurred during use(in handling, soldering, etc.).

    If you bought stock from official distributor, you could contact with them. They can test it for you on site.

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