PCM1681 - ATx[7:0]: Digital Attenuation Level Setting

Hirotaka Matsumoto

Other Parts Discussed in Thread: PCM1681

Hi all,

Would you mind if we ask PCM1681?
When DIGITAL ATTENUATION MODE SELECT is switched between DAMS = 0 and DAMS = 1, does it occur pop-noise or shut-down noise?
Acoording to attenuation, the value of DAC decreases, so we guess that it doesn't occur pop-noise.
So, could you let us know it?

We need your help.

Kind regards,

Hirotaka Matsumoto

over 8 years ago

0 Hirotaka Matsumoto over 8 years ago

Guru 27525 points

Hi team,

We quess that your team is so busy, however we will appreciate for your help if you give us some advice.

Kind regards,

Hirotaka Matsumoto

0 Justin Bohr over 8 years ago in reply to Hirotaka Matsumoto

TI__Mastermind 27850 points

Hi Hirotaka,

I apologize for the delay. I will look into this and get back to you with more information tomorrow.

Justin

0 Justin Bohr over 8 years ago in reply to Justin Bohr

TI__Mastermind 27850 points

Hi Hirotaka,

The data sheet states "Changes in attenuation levels are made by incrementing or decrementing by one step (S-dB) for every 8/fS time interval until the programmed attenuation setting is reached." I believe this means that the output will be ramped to the new volume without a pop.

Justin

0 Hirotaka Matsumoto over 8 years ago in reply to Justin Bohr

Guru 27525 points

Justin san, Thank you for your reply.

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PCM1681 - ATx[7:0]: Digital Attenuation Level Setting