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TLV320AIC3106EVM - Can't get noise threshold running

Alexander Eck
Prodigy 10 points
Other Parts Discussed in Thread: TLV320AIC3106

Hello,
I am trying to evaluate some functions on the TLV320AIC3106EVM Eval Board. I run the TLV320AIC3106EVM with the USB-MODEVM Interface Board via USB on my PC. Driver an communication works fine after troubleshoot some Windows 7 related driver Problems.

Now I am trying to evaluate the AGC "noise threshold" as described in the Datasheet (Ref. F) in Section 11.3.3.2.2. Therfore I use the Line1LP as single ended input and the HPLOUT and HPLCOM as Output.

The following commands are send to configure the TLV320AIC3106
i i2cfast
w 30 13 04
w 30 2E 80
w 30 33 0D
w 30 1A 80
w 30 1C 02
w 30 3A 0D
w 30 35 80

The noise threshold doesn't work. Noise is still on my Headphone. What I am doing wrong? How I can get the noise threshold running?

Thanks a lot!

Best regards

Alexander

  • 0
    TI__Guru* 84915 points

    Hi, Alexander,

    Welcome to E2E and thank you for your interest in our products.

    The PGA_to_HPout doesn't work properly with the AGC functionality. I think that the best output would be a loobpack between DIN and DOUT. This option only can be used in master mode, but it ensures that the DOUT output will be used as DIN input.

    Best regards,
    Luis Fernando Rodríguez S.