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该芯片客户实际拿到手的Device Marking为空白，但按规格书的描述，应该为“ED”，请帮忙确认空白的Device Marking是否正常？货已经到仓库，因为丝印问题迟迟无法入库,请尽快.
您好
TI有过答复：The ED marking is on the backside of the chip. You'll need to look at the backside under a microscope and you will be able to see it.
见下方链接
OPT3001: Photo to show the location of OPT3001 IC marking - Sensors forum - Sensors - TI E2E support forums
