TAS5754M: TAS575x SPKIN as a general input

philippe_44

Part Number: TAS5754M

Hi - I'm successfully using TAS5754 now, but I wanted to add the possibility to have an analogue line-in. The DAC_OUT / SPKIN are routed to a 3.5mm jack and it works perfectly as a line-out. I'd like to put the DAC in a sort of High-Z mode and now feed the analogue amplifier with an external input. I could not find in the manual a way to have the DAC_OUT in high impedance to avoid conflict with my external source

over 6 years ago

0 Andy Liu (BMS) over 6 years ago

TI__Guru 52115 points

Hi Philippe,

When TAS5754M was designed, we didn't expect that the DAC_OUT would connect to a 3.5mm jack. As far as I as know, I don't see there is a way to put the DAC output in HiZ. I can double-check with our design team. Let you know if there exists a way to do that.

Andy

0 philippe_44 over 6 years ago in reply to Andy Liu (BMS)

Prodigy 250 points

Thanks Andy - That would be great of there was a solution!

Philippe

0 Andy Liu (BMS) over 6 years ago in reply to philippe_44

TI__Guru 52115 points

I have not heard back from my design team. I will make a phone call to them if necessary.

0 Luis Fernandes de Pina over 6 years ago in reply to philippe_44

TI__Genius 15200 points

Hello Philippe,

There doesn't seem to be a clear way to output High-Z from the internal DAC, we would recommend that you modify your design externally.

Best Regards,

Luis

0 philippe_44 over 6 years ago in reply to Luis Fernandes de Pina

Prodigy 250 points

Thanks Luis, Andy - I cannot change my design unfortunately, I don't have enough space to add what would be needed to provide that option. That's fine, I won't propose this feature. The TAS575x is a very good chip anyway

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TAS5754M: TAS575x SPKIN as a general input