TLV320AIC3104: single-ended input

Lilian Chang

Intellectual 1555 points

Part Number: TLV320AIC3104

Hi Team,

If 3104 pin LINE1LP used as single-ended input, how to deal with LINE1LM? If we can left LINE1LM pin floating?

over 5 years ago

0 Diego Melendez over 5 years ago

TI__Guru 57800 points

Hi, Lilian,

If the inputs are configured to operate in Single-ended mode, it is recommended to connect LINE1LM to GND through a decoupling cap of the same value as the one connected in Line1LP.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Lilian Chang over 5 years ago in reply to Diego Melendez

TI__Intellectual 1555 points

Hi Diego,

What's the recommend decoupling cap value of input pin like Line1LP？

Thank you

0 Diego Melendez over 5 years ago in reply to Lilian Chang

TI__Guru 57800 points

HI, Lilian,

The selection of the input cap depends on the desired frequency response for the DC filter formed by the cap and input impedance. For this particular device, the input impedance changes with the input PGA mix setting, which varies from 20KΩ (0dB gain set) to 80KΩ (-12dB gain set). A typical value we recommend is 0.1µF of 0.47µF.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

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TLV320AIC3104: single-ended input