TI中文支持网Part Number:TLV320AIC3101
Hi,
Our circuit schematic is as follows:
https://drive.google.com/file/d/1DCwJkGVyJ36NC31igP-qJxRx9YhHtSJf/view?usp=sharing
An ECM microphone is connected to CON2, and audio is captured via the MIC1RP/LINE1RP input path (single-ended).
On the output side, we use the HPROUT (single-ended) line connected to a Class-AB amplifier, which then drives an 8Ω speaker.
In our firmware, we have disabled HPLOUT, HPRCOM, and HPLCOM.
Currently, the output sound from the speaker is very low—one must be very close to hear it—and there is noticeable noise.
May I ask if there is any issue with our hardware or firmware design that could be causing this?
Thank you!
Taylor：
您好，
已经收到了您的案例，调查需要些时间，感谢您的耐心等待。
,
Links：
TI won't let me open a google drive link. Please attach it as a pdf.
This sounds like an SNR problem. Common things to check are confirm that the HPROUT signal from the codec is the expected amplitude (test using a 0dB sine wave). You can also remove the codec connection from the amp and test using a sine wave generator to confirm the amps operation is correct.
