SLOS602E September 2008 – September 2019 TLV320AIC3204
The line outputs of the TLV320AIC3204 drive a signal biased around the device common mode voltage. To avoid loading the common mode with the load, it is recommended to connect the single-ended load through an ac-coupling capacitor. The ac-coupling capacitor in combination with the load impedance forms a high pass filter.
For high fidelity playback, the cutoff frequency of the resultant high-pass filter should be kept low. For example with RL of 10 kΩ, using 1-µF coupling capacitor results in a cut-off frequency of 8 Hz.
For differential lineout configurations, the load should be directly connected between the differential outputs, with no coupling capacitor.
Whenever any of the analog output terminals LOL, LOR, HPL or HPR are not used in an application, they should be left open or not connected.