CS42528-DQZ Cirrus Logic Inc, CS42528-DQZ Datasheet - Page 80

• Manufacturer Part Number: CS42528-DQZ
• Description: IC CODEC S/PDIF RCVR 64-LQFP
• Manufacturer: Cirrus Logic Inc
• Type: Audio Codecr

Specifications of CS42528-DQZ

• Data Interface: Serial
• Resolution (bits): 24 b
• Number Of Adcs / Dacs: 2 / 8
• Sigma Delta: Yes
• Dynamic Range, Adcs / Dacs (db) Typ: 114 / 114
• Voltage - Supply, Analog: 4.75 V ~ 5.25 V
• Voltage - Supply, Digital: 3.13 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Audio Codec Type: Stereo
• No. Of Adcs: 2
• No. Of Dacs: 8
• No. Of Input Channels: 2
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Adcs / Dacs Signal To Noise Ratio: 114dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1503 - BOARD EVAL FOR CS42528/CS49300
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

80
10.1.3 Capacitor Selection
10.1.4 Circuit Board Layout
The type of capacitors used for the PLL filter can have a significant effect on receiver performance. Large
or exotic film capacitors are not necessary because their leads, and the required longer circuit board trac-
es, add undesirable inductance to the circuit. Surface-mount ceramic capacitors are a good choice be-
cause their own inductance is low, and they can be mounted close to the LPFLT pin to minimize trace
inductance. For CRIP, a C0G or NPO dielectric is recommended; and for CFILT, an X7R dielectric is pre-
ferred. Avoid capacitors with large temperature co-coefficient, or capacitors with high dielectric constants,
that are sensitive to shock and vibration. These include the Z5U and Y5V dielectrics.
Board layout and capacitor choice affect each other and determine the performance of the PLL. Figure
30 illustrates a suggested layout for the PLL filter components and for bypassing the analog supply volt-
age. The 10 µF bypass capacitor is an electrolytic in a surface-mount case A or thru-hole package. RFILT,
CFILT, CRIP, and the 0.1 µF decoupling capacitor are in an 0805 form factor. The 0.01 µF decoupling
capacitor is in the 0603 form factor. The traces are on the top surface of the board with the IC so that there
is no via inductance. The traces themselves are short to minimize the inductance in the filter path. The
VARX and AGND traces extend back to their origin and are shown only in truncated form in the drawing.
Figure 30. Recommended Layout Example
= via to ground plane
CFILT
CRIP
0.1 µF
0.01 µF
10 µF
CS42528
DS586F1