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CS42438-DMZ Datasheet(PDF) 51 Page - Cirrus Logic

Part # CS42438-DMZ
Description  108 dB, 192 kHz 6-In, 8-Out TDM CODEC
PDF  61 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS42438-DMZ Datasheet(HTML) 51 Page - Cirrus Logic

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DS646F2
51
CS42438
8.1.1
Passive Input Filter
The passive filter implementation shown in Figure 22 will attenuate any noise energy at 6.144 MHz but
will not provide optimum source impedance for the ADC modulators. Full analog performance will there-
fore not be realized using a passive filter. Figure 22 illustrates the unity gain, passive input filter solution.
In this topology the distortion performance is affected, but the dynamic range performance is not limited.
2700 pF
C0G
10
μF
100 k
Ω
150
Ω
AIN1+,2+,3+,4+
AIN1-,2-,3-,4-
ADC1-2
4.7
μF
AIN5A,6A
AIN5B,6B
ADC3
2700 pF
C0G
10
μF
100 k
Ω
150
Ω
2700 pF
C0G
10
μF
100 k
Ω
150
Ω
Figure 22. Passive Input Filter



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