How to connect stereo (2 channel) signal to 4 channel analog inputs

[arunkumar413]

Hi Team,

I'm using TAS5414C-Q1 IC for audio amplifier. It has 4 channel analog inputs. I'd like to interface 2 channels from a 3.5 mm jack to these 4 channel inputs. How do I achieve this. Should I parallel the inputs. Is the below pic right way to connect in this regard?

https://ibin.co/3RmrPVBx4Sy5.png

Also the inputs to the analog channels shouldn't exceed 1V. How to limit the input to 1V for all channels using a single potentiometer knob.

Thanks,
Arun

 

[audioguru]

A 3.5mm jack has two channels and a common ground. The datasheet for the amplifier IC shows a series input capacitor for each input (you have none) plus a capacitor from ground of the signal source to pin 18 called IN_M.
You do not show the ground of the jack connected with a series capacitor to the amplifier IC.
The datasheet says the maximum input is 1.9V RMS which is 5.37V p-p.

 

[arunkumar413]

That diagram is just for illustration purpose. Not the actual schematic.

 

[MikeMl]

That diagram is just for illustration purpose. Not the actual schematic.

How can we tell?

 

[audioguru]

Since you did not sketch an accurate schematic then you do not know what you are doing and we also do not know what you are doing.

 

[arunkumar413]

Apologies for the confusion. The sketch is just a block diagram to check with you guys if it's the right way to connect.

 

[arunkumar413]

and we also do not know what you are doing.

In my first post I had explained what I wan't to do

 

[audioguru]

We are waiting for you to post a detailed schematic with an audio ground and input capacitors on the amplifier inputs as shown on the datasheet.