Bosch Sensortec Community

    cancel
    Showing results for 
    Search instead for 
    Did you mean: 

    BMP280 Part Marking

    BMP280 Part Marking

    ChuckATSC
    Occasional Visitor

    Hello, we recently received a batch of BMP280 chips which when placed on our PCB are ALL (40/40) reading 4 - 5 mBar low compared to our calibrated pressure meter, and also when compared to our previous batch of PCB's. There have been no changes to our firmware or circuit board, so we would like to verify if these parts are legitimate or not.

    The parts have the following marking:

    OTB-KL

    Per the latest datasheet, that last 'L' does not look correct. Can you confirm?

    Thanks.

    1 REPLY 1

    FAE_CA1
    Community Moderator
    Community Moderator

    Hi,

    Thanks for your inquiry.

    The laser marking "OTB-KL" is not the correct marking for BMP280. It should be "xxx-KS" or "xxx-KM" according to the latest BMP280 datasheet. Please refer to the topic at https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BMP280-measures-with-an-10hPa-offset/td-... for more information.

    Thanks.

    Icon--AD-black-48x48Icon--address-consumer-data-black-48x48Icon--appointment-black-48x48Icon--back-left-black-48x48Icon--calendar-black-48x48Icon--center-alignedIcon--Checkbox-checkIcon--clock-black-48x48Icon--close-black-48x48Icon--compare-black-48x48Icon--confirmation-black-48x48Icon--dealer-details-black-48x48Icon--delete-black-48x48Icon--delivery-black-48x48Icon--down-black-48x48Icon--download-black-48x48Ic-OverlayAlertIcon--externallink-black-48x48Icon-Filledforward-right_adjustedIcon--grid-view-black-48x48IC_gd_Check-Circle170821_Icons_Community170823_Bosch_Icons170823_Bosch_Icons170821_Icons_CommunityIC-logout170821_Icons_Community170825_Bosch_Icons170821_Icons_CommunityIC-shopping-cart2170821_Icons_CommunityIC-upIC_UserIcon--imageIcon--info-i-black-48x48Icon--left-alignedIcon--Less-minimize-black-48x48Icon-FilledIcon--List-Check-grennIcon--List-Check-blackIcon--List-Cross-blackIcon--list-view-mobile-black-48x48Icon--list-view-black-48x48Icon--More-Maximize-black-48x48Icon--my-product-black-48x48Icon--newsletter-black-48x48Icon--payment-black-48x48Icon--print-black-48x48Icon--promotion-black-48x48Icon--registration-black-48x48Icon--Reset-black-48x48Icon--right-alignedshare-circle1Icon--share-black-48x48Icon--shopping-bag-black-48x48Icon-shopping-cartIcon--start-play-black-48x48Icon--store-locator-black-48x48Ic-OverlayAlertIcon--summary-black-48x48tumblrIcon-FilledvineIc-OverlayAlertwhishlist