CS42426_05 CIRRUS [Cirrus Logic], CS42426_05 Datasheet - Page 61
CS42426_05
Manufacturer Part Number
CS42426_05
Description
114 dB, 192 kHz 6-Ch Codec with PLL
Manufacturer
CIRRUS [Cirrus Logic]
Datasheet
1.CS42426_05.pdf
(73 pages)
- Current page: 61 of 73
- Download datasheet (2Mb)
DS604F1
8. APPENDIX A: EXTERNAL FILTERS
8.1
8.2
ADC Input Filter
The analog modulator samples the input at 6.144 MHz (internal MCLK=12.288 MHz). The digital filter will
reject signals within the stopband of the filter. However, there is no rejection for input signals which are
(n
analog input buffer that will attenuate any noise energy at 6.144 MHz, in addition to providing the optimum
source impedance for the modulators. The use of capacitors that have a large voltage coefficient (such as
general-purpose ceramics) must be avoided since these can degrade signal linearity.
DAC Output Filter
The CS42426 is a linear phase design and does not include phase or amplitude compensation for an exter-
nal filter. Therefore, the DAC system phase and amplitude response will be dependent on the external an-
alog circuitry.
×
6.144 MHz) the digital passband frequency, where n=0,1,2,... Refer to
AINL
AINR
AOUT +
AOUT -
100 k
100 k
Ω
Ω
3.32 k
3.32 k
2.8 k
2.8 k
Figure 25. Recommended Analog Output Buffer
Ω
Ω
100
Ω
100
Ω
V A
Figure 24. Recommended Analog Input Buffer
V A
µ
µ
F
F
5.49 k
1.65 k
5800 pF
1800 pF
C0G
C0G
0.1
0.1
10 k
10 k
µ
µ
F
F
Ω
Ω
Ω
Ω
-
+
-
+
470 pF
100
470 pF
100
C0G
C0G
µ
2.94 k
1.87 k
µ
F
887
F
332
332
634
634
634
Ω
634
Ω
Ω
91
91
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
6.19 k
22
-
+
-
+
+
470 pF
-
470 pF
C0G
C0G
µ
Ω
F
1200 pF
390 pF
C0G
C0G
634
634
91
91
Ω
Ω
Ω
Ω
22
2700 pF
2700 pF
µ
C0G
C0G
F
47.5 k
1 k
Ω
A INR1+
A INL1+
A INL1-
A INR1-
Ω
Figure 24
for a recommended
Analog
Out
CS42426
61
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