LM4041C - Likely bad batch of LM4041CILP voltage reference

Other Parts Discussed in Thread: LM4041CPart Number: LM4041C

Application: ref voltage for audio application

Question type: Production/quality issue

Support topic: /Feedback/Other feedback/

Description of the problem: As part of a recent order with Mouser I purchased 50 pieces of LM4041CILP. I've been using this same part in one of our products for almost 3 years with no problems. We use it to generate 1.8 volts. In recent builds using this part we started to notice that it was generating only 0.7 volts rather than 1.8 volts. We've made not made any hardware changes and we double checked that all other parts used with this part are correct.

As part of our troubleshooting we replaced the part with the exact same part number but from a different batch of identical parts bought under a prior order. Replacing the part corrected the voltage problem.

The only reasonable conclusion we can make is that this most recent batch of LM4041CILP voltage reference parts are mostly faulty or fail soon after being installed.

Using a hi-rez scope the data on part are as follows:

51ML50E
NPCI
TI

According to TI docs the NPCI is the code for the part LM4041CILP.

This part is critical to our product and we are being delayed due to this problem. We have provided similar notice to Mouser.