CS42438_07 Datasheet, PDF (28/61 Pages) Cirrus Logic – 108 dB, 192 kHz 6-In, 8-Out TDM CODEC

CS42438
5.0 V
3.9 V
2.5 V
1.1 V
3.9 V
2.5 V
1.1 V
VA
AINx+
AINx-
Full-Scale Differential Input Level =
(AINx+) - (AINx-) = 5.6 VPP = 1.98 VRMS
Figure 9. Full-Scale Input
5.2.2
ADC3 Analog Input
ADC3 accommodates differential as well as single-ended inputs. In Single-Ended Mode, an internal MUX
selects from up to four single-ended inputs.
AIN5A _{Single-Ended Input Filter}
AIN5B
Single-Ended Input Filter
50
AIN5+/-
Differential
Input Filter
49
ADC3
AIN5_MUX
1
0
1
0
0
VQ 1
AIN6_MUX
ADC3 SINGLE
+
AIN5
-
AIN6+/-
Differential
Input Filter
AIN6A _{Single-Ended Input Filter}
1
0
52
51
1
0
+
AIN6
-
0
VQ ¹
AIN6B _{Single-Ended Input Filter}
Figure 10. ADC3 Input Topology
28
DS646F2