Datasheet

Table Of Contents

Recommended Media Player

www.ti.com

4 Recommended Media Player

The Apple

QuickTime

media player is recommended to perform listening tests because it does not

initiate or terminate USB communications abruptly as does the Windows Media Player

. Abrupt signal

processing could result in a clicking sound on the headphone side. This type of click has been confirmed

to not be related to the TLV320DAC3202 device because no writing or reading of registers occurs during

this period of time to the device under test (DUT).

It is also suggested to not stop or pause the player in the middle of a large audio signal.

Users can download the QuickTime Player from the Apple website at

http://www.apple.com/quicktime/download/.

5 Performance Testing

In order to evaluate the performance of the TLV320DAC3202, several uncompressed wave files (.wav)

have been developed; each plays for approximately 2 minutes. Table 1 gives a description of these files.

Table 1. .WAV Test File Summary

Parameter 48kS/s Files 44.1kS/s Files

Idle Channel Noise ICN_48kS.wav ICN_44kS.wav

Dynamic Range DR_48kS.wav DR_44kS.wav

Crosstalk CT_48kS.wav CT_44kS.wav

0 dBFS THD FS_48kS.wav FS_44kS.wav

–3 dBFS THD M3dBFS_48kS.wav M3dBFS_44kS.wav

–20 dBFS THD M20dBFS_48kS.wav M20dBFS_44kS.wav

These wave files are generated with 24-bit data length and a tone setting of approximately 1-kHz. Simply

double-click on the .wav file and an active system media player opens to play the tone.

These wave files are available for download from the device product folder.

Some performance results captured on an Audio Precision system (AP 2722) with 48-kHz sampling wave

files are shown in Figure 6. This type of measurement is done by connecting the 3.5-mm audio jack to the

Audio Precision unbalanced BNC inputs.

Figure 6. AP Performance Testing

TLV320DAC3202EVM SLAU327–October 2010

Submit Documentation Feedback