CS5346-CQZ View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS5346-CQZ' PDF : 40 Pages View PDF
CS5346
demonstrates a simple solution. The 1800 pF capacitors in the low-pass filter should be C0G or equivalent
to avoid distortion issues
Analog Input
CS5346
36 kΩ
9 k Ω to 144 k Ω
-
VCM
+
A/ D Input
Figure 10. CS5346 PGA
Analog Input
100 kΩ
2. 2 µF
CS5346
36 k Ω
9 k Ω to 144 k Ω
-
VCM
+
A/ D Input
Figure 11. 1 VRMS Input Circuit
.
Analog Input
100 kΩ
100 Ω 2. 2 µF
CS5346
36 kΩ
1800 pF
VCM
9 kΩ to 144 k Ω
-
+
A/ D Input
Figure 12. 1 VRMS Input Circuit with RF Filtering
5.5.2 Analog Input Configuration for 2 VRMS Input Levels
The CS5346 can also be easily configured to support an external 2 VRMS input signal, as shown in
Figure 13. In this configuration, the 2 VRMS input signal is attenuated to 1.5 VRMS at the analog input with
the external 12 kΩ resistor and the input impedance to the network is increased to 48 kΩ. The PGA gain
must also be configured to attenuate the 1.5 VRMS at the input pin to the 1.0 VRMS maximum A/D input level
to prevent clipping in the ADC.
Analog Input
100 kΩ
12 k Ω 2. 2 µF
CS5346
36 kΩ
9 k Ω to 144 k Ω
18 pF
-
VCM
+
A/ D Input
Figure 13. 2 VRMS Input Circuit
24
DS861PP1
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