Cirrus Logic CS4270 - Manual (Page 26)

26 DS686F1
CS4270
220 pF
Analog
Input
10 µF
AINx
CS4270
+
2 k 
(R1)
2 k 
(R2)
Figure 15. CS4270 Example Analog Input Network
1 10
-110
-105
-100
-95
-90
-85
-80
-75
-70
-65
-60
ADC Source Impedance (kOhms)
ADC THD+
N @
1
kH
z
Figure 16. A/D THD+N Performance vs. Input Source Impedance
(k )
1 10 100
88
90
92
94
96
98
100
102
104
106
ADC Source Impedance (kOhms)
AD
C
D
ynam
ic
R
ange
Figure 17. A/D Dynamic Range vs. Input Source Impedance
(k )