Cirrus Logic CDB4270 - Manual (Page 31)

DS686DB3 31
CDB4270
9. DAC PERFORMANCE PLOTS
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 35. FFT (48 kHz, 0 dB) Figure 36. FFT (48 kHz, -60 dB)
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20k 120k 40k 60k 80k 100k
Hz
Figure 37. FFT (48 kHz, No Input) Figure 38. FFT (48 kHz Out-of-Band, No Input)
-110
+0
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
-110
+0
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
r
A
-120 +0 -100 -80 -60 -40 -20
dBFS
Figure 39. 48 kHz, THD+N vs. Input Freq Figure 40. 48 kHz, THD+N vs. Level