CS4350-DZZ Cirrus Logic Inc, CS4350-DZZ Datasheet - Page 23

• Manufacturer Part Number: CS4350-DZZ
• Description: IC 105dB 192kHz DAC W/PLL
• Manufacturer: Cirrus Logic Inc

Specifications of CS4350-DZZ

• Number Of Bits: 24
• Data Interface: Serial
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 290mW
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1517 - BOARD EVAL FOR CS4350 DAC
• Settling Time: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 598-1184-5

DS691F1
4.8
4.9
4.9.1
Analog Output and Filtering
The Cirrus Application Note titled Design Notes for a 2-Pole Filter with Differential Input, available as AN48
at www.cirrus.com, discusses the second-order Butterworth filter and differential-to-single-ended converter
that was implemented on the CS4350 evaluation board, CDB4350.
implementation. If only single-ended outputs from the CS4350 are required, the passive output filter shown
in
Grounding and Power Supply Arrangements
As with any high-resolution converter, the CS4350 requires careful attention to power supply and grounding
arrangements if its potential performance is to be realized.
rangements, with VA, VLC, and VLS connected to clean supplies. The use of split analog and digital ground
planes is not recommended. However, if planes are split between digital ground and analog ground the
GND pins of the CS4350 should be connected to the analog ground plane.
All signals, especially clocks, should be kept away from the VBIAS, VFILT, and VQ pins in order to avoid
unwanted coupling into the DAC.
Capacitor Placement
Decoupling capacitors should be placed as close to the DAC as possible, with the low value ceramic ca-
pacitor being the closest. To further minimize impedance, these capacitors should be located on the same
layer as the DAC. If desired, all supply pins may be connected to the same supply, but a decoupling ca-
pacitor should still be placed on each supply pin.
Note:
The CDB4350 evaluation board demonstrates the optimum layout and power supply arrangements.
Figure 18
All decoupling capacitors should be referenced to GND.
can be used.
CS4350
GND
AOUTx -
AOUTx +
* See section 4.9 for ground connection details
Figure 17. Differential to Single-Ended Output Filter
Figure 18. Passive Single-Ended Output Filter
CS4350
GND
AOUTx +
* See section 4.9 for ground connection details
4.64 kΩ
1.62 kΩ
.015 μF
5600 pF
C0G
C0G
3.3 µF
+
1.37 kΩ
221 Ω
392 Ω
10 kΩ
4.02 kΩ
560 Ω
22 μF
+
-
2700 pF
1000 pF
C0G
C0G
Figure 10
2200 pF
22 μF
shows the recommended power ar-
Analog
Output
562 Ω
47 kΩ
Figure 17
Analog
Output
illustrates this
CS4350
23