CS42448-CQZR Cirrus Logic Inc, CS42448-CQZR Datasheet - Page 25

• Manufacturer Part Number: CS42448-CQZR
• Description: IC,Soundcard Circuits,CMOS,QFP,64PIN,PLASTIC
• Manufacturer: Cirrus Logic Inc

DS648F2
4.2.2
The ADC output data is in 2’s complement binary format. For inputs above positive full scale or below neg-
ative full scale, the ADC will output 7FFFFFH or 800000H, respectively, and cause the ADC Overflow bit
in the register
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.
Single-Ended Mode is selected using the ADC3_SINGLE bit. Analog input selection is then made via the
AINx_MUX bits. See register
lections. Refer to
“Status (Address 19h) (Read Only)” on page 51
3.9 V
1.1 V
3.9 V
1.1 V
Figure 12 on page 27
AIN6B
AIN5B
AIN6A
AIN5A
2.5 V
2.5 V
AIN5+/-
AIN6+/-
Single-Ended Input Filter
Single-Ended Input Filter
Single-Ended Input Filter
Single-Ended Input Filter
(AINx+) - (AINx-) = 5.6 V
Full-Scale Differential Input Level =
“ADC Control & DAC De-Emphasis (Address 05h)” on page 45
Figure 11. ADC3 Input Topology
Differential
Differential
Input Filter
Input Filter
Figure 10. Full-Scale Input
for the internal ADC3 analog input topology.
PP
= 1.98 V
58
57
60
59
RMS
1
0
1
0
VQ
VQ
AIN5_MUX
AIN6_MUX
ADC3
AINx-
AINx+
1
0
1
0
0
1
0
1
to be set to a ‘1’.
ADC3 SINGLE
+
+
-
-
AIN5
AIN6
VA
5.0 V
CS42448
for all bit se-
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