Part Number: PCM1863
We have a product of audio processor in small batch trial production, but the current PCM1863 used in the product does not pass the CMRR in production test. CMRR is required to be above 40 dB. The typical CMRR value of PCM1863 given in specifications is 56 dB. However, in actual test, the CMRR value of some prototypes is 34-40 dB (trial production of 30 pcs, 6 pcs appears this situation). The test is done by AP tester, please help see what causes this situation? What's the solution?
Can you please help me w more details of the test conditions under which you measure lower CMRR? Thanks.
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 Ravi Patil:
We use AP tester and input signal test of 1kHz and 2V rms.
In reply to Jace Chen:
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. 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.