• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 43 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

PCM5102A: TPA3136D2PWP

Krishal Solanki
Prodigy 10 points
Part Number: PCM5102A
Other Parts Discussed in Thread: LM1972, TAD5112, PCM1789

Tool/software:

Hi there,

I am using DAC PCM5102APW with the amplifier TPA3136D2PWP to control the speaker in our cooking device.

But the issue we are not able to control the volume of the speaker as everything is fixed.

I tried searching for DAC with Programmable Gain Amplifier and higher sampling frequency in range of 384kHz to solve this.

But unable to find it.

So another idea I found to integrate with LM1972 for volume control.

Can you please suggest how can I integrate this LM1972 with PCM5102APW at the output to get volume control for our device.

And you are free to suggest alternate parts for PCM5102APW DAC which has PGA and high sampling frequency.

We are soon going into production and we will need 3000 units annually.

So please help us.

I can share the design as well if I can get an email but I don't want to share on public forum

  • 0
    TI__Mastermind 23960 points

    Hello Krishal, 

     Our newest and top of the line DACs , for example TAD5112,  has   Programmable Channel Gain and Digital Volume Control   and you can read more about it in section   7.3.1.8.1.1 of its datasheet. Its sampling rate is about x2 more than what you want. I can connect you with our marketing team if you are interested.

     PCM1789 or PCM175x are among  other DACs  with attenuator  and they can attenuate the signal from 0dB all the way down to  -63dB  ( LM1792 attenuates from 0 to -78 dB) .  Sampling rate is up to 200kHz though. 

    Regarding LM1972,  it is possible to connect the dac via a coupling capacitor and LP filter  to this device and use it to change the volume. I am not very familiar with this IC , so if you need more specific  guidance regarding usage of LM1972, please open a new post with only LM1792 in its title so it gets assigned to the team with expertise on it. 

    I close this post but feel free to reach me if you have any questions.

    Regards,

    Arash