Cirrus Logic CDB4270 - Manual (Page 27)

DS686DB3 27
CDB4270
8. ADC PERFORMANCE PLOTS
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
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
F
S
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 11. FFT (-1 dB 48 kHz) Figure 12. FFT (-60 dB, 48 kHz)
-150
+0
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
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
F
S
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Figure 13. FFT (48 kHz, No Input) Figure 14. 48 kHz, THD+N vs. Input Freq
-110
+0
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
d
B
F
S
-120 +0 -100 -80 -60 -40 -20
dBr
-40
+40
-35
-30
-25
-20
-15
-10
-5
+0
+5
+10
+15
+20
+25
+30
+35
d
B
F
S
-140 +0 -120 -100 -80 -60 -40 -20
dBr
T T T T T
Figure 15. 48 kHz, THD+N vs. Level Figure 16. 48 kHz, Fade-to-Noise Linearity