TAS5756M: Question about SPK_MUTE

bonobono

Part Number: TAS5756M

Audio signals are input directly to SPK_INA / INB without going through internal DAC.
Even if SPK_MUTE is set to LOW, the amplifier output is not MUTE.
Please let me know the reason or any point to consider when using SPK_MUTE.

over 6 years ago

0 bonobono over 6 years ago

Prodigy 50 points

Is SPK_MUTE for muting the DAC?
Is there a way to mute AMP?

0 Andy Liu (BMS) over 6 years ago in reply to bonobono

TI__Guru 52115 points

Let me double check.

Also, please note that your current application is not what the TAS5756M originally designed for.

Andy

0 bonobono over 6 years ago in reply to Andy Liu (BMS)

Prodigy 50 points

Hi, Andy,

Thank you for your reply.
I would like to confirm the following.

1. SPK_MUTE mutes only the DAC block, isn't it?
2. Please tell me how to mute the Amplifier block if possible.

0 Andy Liu (BMS) over 6 years ago in reply to bonobono

TI__Guru 52115 points

See my comments below.

1. SPK_MUTE mutes only the DAC block, isn't it?

Pulling /SPK_MUTE LOW is like doing a digital mute. An analog mute follows after a digital mute is done. The analog mute can be disabled by writing 1 to P1-R6.

Andy

0 Andy Liu (BMS) over 6 years ago in reply to bonobono

TI__Guru 52115 points

Unfortunately, I have not yet found a way to mute the amplifier output only without doing a digital mute first.

Andy

0 bonobono over 6 years ago in reply to Andy Liu (BMS)

Prodigy 50 points

Hi, Andy,
We could mute the analog block by setting P1-R6 to 0.
Thank you for your support.

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TAS5756M: Question about SPK_MUTE