CS5340-CZZ Cirrus Logic Inc, CS5340-CZZ Datasheet - Page 6

• Manufacturer Part Number: CS5340-CZZ
• Description: IC ADC AUD 101DB 200KHZ 16-TSSOP
• Manufacturer: Cirrus Logic Inc

Specifications of CS5340-CZZ

• Package / Case: 16-TSSOP
• Number Of Converters: 2
• Number Of Bits: 24
• Sampling Rate (per Second): 200k
• Data Interface: Serial
• Voltage Supply Source: Single Supply
• Operating Temperature: -10°C ~ 70°C
• Mounting Type: Surface Mount
• Conversion Rate: 192 KSPS
• Resolution: 24 bit
• Number Of Adc Inputs: 2
• Operating Supply Voltage: 3.3 V or 5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 10 C
• Mounting Style: SMD/SMT
• Power Consumption: 90 mW
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 3.1 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1544 - BOARD EVAL FOR CS5340 STEREO ADC
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1081-5

6
7. Input Filter Topology
Both the CS5333 and CS5340 implement a single-ended input architecture. Due to differences in the input
sampling topologies within the converters, the input filter requirements are different between these two
devices.
A suggested input filter topology for the CS5333 is shown in Figure 3. This input network consists of an
AC-coupling capacitor along with a single-pole lowpass filter.
The CS5333 will self-bias the analog input node to the optimal bias point (half of VA). The CS5333 imple-
ments an internal buffer on the analog input, reducing the amount of switching current on the input sam-
pling node. This reduction in switching current makes the CS5333 less sensitive to series resistance on
the analog input lines.
A suggested input filter topology for the CS5340 is shown in Figure 4.
This filter topology implements an external resistor-divider circuit to bias the output of the amplifier to the
optimal bias point (half of VA). Due to the internal architecture, the CS5340 requires low impedance on
the analog input lines. The topology shown in Figure 4 provides a sub-ohm input source impedance into
the CS5340 and isolates the input to the amplifier. For more information on this input filter topology, please
refer to the Application Note AN241.
A passive input filter can be used with the CS5340, however, the full analog performance of the CS5340
will not be realized. Figure 5 illustrates a unity gain, passive input filter solution and the resulting distortion
performance. Please note that in this case the dynamic range performance of the CS5340 will not be lim-
ited by the input filter; only the distortion performance is affected.
100 kΩ
4.7 µF
100 kΩ
100 kΩ
V A
150 Ω
Figure 3. CS5333 Input Filter
Figure 4. CS5340 Input Filter
+
-
0.47 uF
470 pF
C0G
0.01 uF
C0G
634 Ω
91 Ω
AINx
CS5333
2200 pF
C0G
AINx
CS5340
AN249