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4.14 Idle Noise FFT Spectrum (PBTL)
0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
IdleNoiseSpectrum-dB
0 5k 10k 15k 20k
f-Frequency-Hz
25k 30k 35k 40k 45k 50k 55k 60k 65k 70k 75k 80k 85k
4.15 Channel Separation
-80
10
-70
-60
-50
-40
-30
-20
-10
0
20 20k50 100 200 500 1k 2k 5k 10k
f-Frequency-Hz
InputSignal-dB
Channel1
Channel2
TAS5342DDV6EVM Performance
Automute disabled – Register x04h set to x60h. Reference voltage is 18.75 V. FFT size 16k.
Figure 17. Idle Noise FFT Spectrum (PBTL)
Channel separation is tested for two channels in different package, channel 1 and channel 2. 4- Ω loads
are used for both channels. Channel 1 input signal is 0 dBFS, channel 2 muted. Reference voltage 19
Vrms
Figure 18. Channel Separation
TAS5342DDV6EVM 18 SLAU239 – February 2008
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