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Hi there,
I am using TLV4333 as differential amplifier to sense temperature. I have tested my circuits on few samples and found it working good on all samples. Then we went for mass production. In mass production 25/100 pieces is showing error at amplifier out put. the differential input is coming correctly to inverting and non-inverting terminal of TLV but out is not showing on 2 channels out of three being used.
can you help me find any suspected reason for it. ( the same circuit is working correctly in 75/100 systems)
I am attaching schematic for the reference.
Hi Kumar,
The difference amplifier works per the drawing.
Is there a possibility that the TC's polarity reversed during test? The TC has + and - polarity, typically it uses two different color code.
If you are able to measured +IN, −IN, and OUT as Clemens suggested, you will likely find the issues.
Here is the application note how to terminate unused op amp pins.
https://www.ti.com/lit/ab/sboa204a/sboa204a.pdf?ts=1727029247483
Best,
Raymond
