CDB5368 Cirrus Logic Inc, CDB5368 Datasheet - Page 28

• Manufacturer Part Number: CDB5368
• Description: BOARD EVAL FOR CS5368 192KHZ ADC
• Manufacturer: Cirrus Logic Inc

Specifications of CDB5368

• Number Of Adc's: 1
• Number Of Bits: 24
• Sampling Rate (per Second): 192k
• Data Interface: Serial
• Inputs Per Adc: 8 Differential
• Input Range: ±0.3 V
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS5368
• Description/function: Audio A/D
• Operating Supply Voltage: 3.3 V
• Product: Audio Modules
• For Use With/related Products: CS5368
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1157

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4.10
Analog Connections
The analog modulator samples the input at half of the internal Master Clock frequency, or 6.144 MHz nom-
inally. The digital filter will reject signals within the stopband of the filter. However, there is no rejection of
input signals that are at (N X 6.144 MHz) the digital passband frequency, where n=0,1,2.... Refer to
Figure
providing the optimum source impedance for the modulators. The use of capacitors that have a large volt-
age coefficient (such as general-purpose ceramics) must be avoided since these can degrade signal linear-
ity. COG capacitors are recommended for this application. For additional configurations, refer to Cirrus
Application Note AN241.
15, which shows the suggested filter that will attenuate any noise energy at 6.144 MHz in addition to
100 kΩ
100 kΩ
A IN +
A IN -
10 uF
10 uF
Figure 15. Recommended Analog Input Buffer
10 k Ω
10 k Ω
+
+
-
-
634 Ω
634 Ω
V Q
C O G
470 pF
470 pF
C O G
91 Ω
91 Ω
2700 pF
C O G
A D C A IN -
A D C A IN +
CS5368
DS624F4