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TAS5721 Audio Amplifier Headphone Shutdown Question

Dave Geno
Prodigy 40 points
Other Parts Discussed in Thread: TAS5721
Hi Diego,
 
A question regarding the headphone amplifier shutdown pin (39 DR_SD) of the TAS5721 Audio Amplifier.  When in shutdown, I assume the output of the amplifier stage enters a hi-Z state?  Is the amplifier pass-through during shutdown?  Thanks.
 
Dave Geno
Sr. Electrical Engineer
VXi Corporation
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Fax. (603) 742-5065 | Geno@vxicorp.com | www.vxicorp.com
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From: Diego Meléndez [mailto:bounce-4117384@mail.e2e.ti.com]
Sent: Friday, September 11, 2015 3:01 PM
To: AudioAmpsForum@mail.e2e.ti.com
Subject: Audio Amplifiers Forum: TAS5721 Audio Amplifier Power Supply Question
 

 
A Message from the TI E2E™ Community
Texas Instruments

 

Diego Meléndez replied to TAS5721 Audio Amplifier Power Supply Question.

Hi Dave,

Welcome to E2E, thanks for your interest in our products!,

We suggest to follow the RECOMMENDED OPERATING CONDITIONS table when designing a new system with our devices. The recommended value is selected to ensure that the device will be working as expected and with the best performance.

Best Regards,

  -Diego Meléndez López
   Audio Applications Engineer

 
 

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  • 0
    TI__Guru 57800 points

    Hi Dave,

    As your latest question is related to a different topic I have moved it to a different thread. The DR_SD  pin acts as the shutdown for the headphone/driver only, the outputs of the amplifier don't get affected by this. The amplifier can be put in a shutdown state via software only, via register 0x05. When this happens, the outputs of the amplifier are effectively placed in Hi-Z state.

    Best Regards,

      -Diego Meléndez López
       Audio Applications Engineer