CS4244-CNZ Cirrus Logic Inc, CS4244-CNZ Datasheet - Page 36

• Manufacturer Part Number: CS4244-CNZ
• Description: IC 4 Input / 5 Output CODEC
• Manufacturer: Cirrus Logic Inc

DS900PP2
4.6.2.3
The ADC path contains an optional HPF which can be enabled or disabled for all four ADCs via the
ABLE HPF” bit in the "ADC Control 1"
of the input signal needs to be preserved in the digital output data. The HPF characteristics are given in
the
bles on pages
Note: If the internal bias is enabled (ADC CMx bits = ‘1’), the ADC HPF must be enabled to achieve full
specified performance.
The following figure shows how the recommended single-ended to differential active input filter
(Figure
age swing should not exceed the ADC full-scale input specification.
Figure 25. Single-Ended to Differential Active Input Filter - DC Coupled Input Signal (VA/2 Centered)
ADC Digital Filter Characteristics
100 k
24) can be modified to allow for DC coupled inputs when the HPF is disabled. Note that the volt-
100 k
ADC HPF
11
100 k
100 k
100 k
100 k
and
VA
22 F
VA
Figure 24. Single-Ended to Differential Active Input Filter
12
0.01 F
specify the DC offset error when the HPF is enabled or disabled.
0.01 F
100 k
-
+
470 pF
-
+
C0G
22 F
470 pF
C0G
22 F
table and plotted in
register. The HPF should only be disabled when the DC component
634 
634 
634 
634 
91 
91 
-
+
470 pF
-
+
C0G
470 pF
C0G
Section
* Place close to AINx pins
634 
* Place close to AINx pins
634 
91 
91 
7. The Analog Input Characteristics ta-
2700 pF
2700 pF
C0G
C0G
*
*
AINx+
AINx-
AINx+
AINx-
ADC1-4
ADC1-4
CS4244
“EN-
36