Hi, i am new to audio analog engineer. I have planned to design headphone volume control circuit using AD5116. Is it fine to use this digital pot for this application? Anybody have reference design for headphone volume control circuit?
We do have some parts that designed for headphone usage complete with headphone drivers and volume controls. Have a look at the ADAU1772, ADAU1372, ADAU1761.
I will also move your question over to the Precision DACs community where they support the part you asked about.
Thanks for your reply. Actually we design a small device which will control volume for smart phones.
I think it is not require any other amplifiers and headphone drivers. Can you help do to with any digital pot?
Well, I do not work in the group that produces these digital pots. However, I have done some designs using them. The current capabilities are quite small so using it for headphone level signals is probably not a good idea. To be sure you should reply with more technical details like voltage level for AVDD that you plan on using? The voltage level of the signals you plan on running through this part? What is the proposed schematic around this part?
This way when someone who does work with this part reads this they can have the information they need.
Now, back to what I was asking about. I do not understand what you are trying to do. All the signals in a smart phone are digital and the headphone outputs are usually driven right off of the DSP or Codec. If it is using a headphone amp I would be surprised and it probably has a digital input not analog. So are you planning on using this on the headphone output signal itself? If you are then that will not work. This part cannot handle those current levels and cannot drive a headphone off of it.
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