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.

TPA2037D1: Logic level of inputs IN+ & IN- during shutdown mode

Part Number: TPA2037D1


I have an application where an MP3 decoder IC (VS1003) can drive either an external speaker via a 3.5mm aux jack or an on PCB speaker via the TPA2037D1 amplifier. When a 3.5mm jack is detected, I plan to set the amplifier EN pin low to shut it down, since an external speaker is used in that case. Please see attached schematic. 

In shutdown mode, what is the logic level of the amplifiers's (TPA2037D1) IN+ and IN- pins ( A1, C1) held at? Are they clamped to a particular value or are they high impedance? If they are clamped to a particular value, that will be problematic since this would impact playback through the external speakers. 

As an aside, if TI has any products or suggestions or for an MP3 decoder IC, would love to hear about it. Currently using the VS1003 IC.