This thread has been locked.
If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
Part Number: LMV324
1. The LMV324IDR is used for three op amp instrumentation amplifier circuits. The normal operation of the chip at the first stage of amplification is 14.3 (resistance parameters are the same,Unusual deviations in the first-level amplification of the chip, eg 16.6 times, 10.2 times) Misaligned die soldering is still abnormal on qualified PCB boards.The abnormal PCB board is normal after replacing the customer's chip.I would like to ask if this is the quality of my chip or the customer's circuit design? Or is the computing range of this LMV324 unable to meet the needs of customers?
2. The suffix of the material previously used by the customer is G4. I now give them LMV324 with G3 suffix. The customer uses G4, and G3 cannot. I would like to ask what is the difference between G3 and G4? I have inquired that the G4 was produced overseas. It seems that it is Mexico or Malaysia. The G3 is made in China. Is it? If the origin is not the same, but this does not affect the parameters inside there is a big difference can not be used!
3. I went back to the client yesterday and also took the LMV324IDR tail of the Malaysian origin to test the G4, but it was also the same as the G3 that was sent to the customer before. The magnification was unstable and the fluctuation data was relatively large.There are 12 bad chips in the 2000 chips, a difference of 800 times. I took a test that was given to my own engineer. But it was bad to measure this material, but it did not break down. Now you can help analyze what is the reason.
Regards,Ronald MichallickLinear Applications
TI assumes no liability for applications assistance or customer product design. Customer is fully responsible for all design decisions and engineering with regard to its products, including decisions relating to application of TI products. By providing technical information, TI does not intend to offer or provide engineering services or advice concerning Customer's design. If Customer desires engineering services, the Customer should rely on its retained employees and consultants and/or procure engineering services from a licensed professional engineer (LPE).
We are glad that we were able to resolve this issue, and will now proceed to close this thread.
If you have further questions related to this thread, you may click "Ask a related question" below. The newly created question will be automatically linked to this question.
In reply to Ron Michallick:
In reply to Eric Cui13:
In reply to kai klaas69:
Hi Eric, without knowing more about the circuitry at the input of LMV324 I can only speculate that it has to do with the fact that the LMV324 cannot go fully down to 0V at its output. Eventually you should take an OPAmp which can swing from rail to rail at the output (RRIO). Also, the LMV324 has a high offset voltage, which is in the range of your measuring signal. So, you should eventually look for a better OPAmp. Kai
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.