Other Parts Discussed in Thread: , , LMV762
I have a design that requires low input offset voltage. I have used the LM393 with success in the past for this design for many years. On my latest batch of boards the boards tested and the final product tested fine during production. After an hour running at the customer they started to fail. I have found that the offset voltage is greater then the spec allows. The typical is 2mv, max is 5mv and absolute worst is suppose to be 9mv at 125C. I am measuring 10mv to 12mv at room temp on the sample I have. I could move to the LM393A as the specs are better but how do I know they are going to be in spec when the ones I have now are not. I could see how these would have passed your initial inspection as they passed ours initial inspection. I have at least 750 of these suspect parts populated on boards. I can send you whatever other information you need to make this right.