Hello Zhang, Yes, I Understand the question you are asking. The letter "L" was removed from the topside of the device per the PCN I have sent over. If you notice in the PCN on the left side of the image (underlined) there is text describing a "POST SYMBOL MARKING". On the datasheet and previous iterations of the topside marking this marking was the letter "L". On the right side of the PCN image the "POST SYMBOL MARKING" is removed meaning the letter "L" is removed from the topside marking of future manufactured devices. The datasheet was not updated, but the PCN explains that the letter "L" was removed from the ADS1286UL/2k5. Let me know if you have any other questions. Regards, Josh
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