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參數資料
| 型號： | CDB42528 |
| 廠商： | Cirrus Logic, Inc. |
| 元件分類： | Codec |
| 英文描述： | 114 dB, 192 kHz 6-Ch Codec with S/PDIF Receiver |
| 中文描述： | 114分貝192千赫6通道編解碼器與S / PDIF接收器 |
| 文件頁數： | 81/90頁 |
| 文件大?。?/td> | 1560K |
| 代理商： | CDB42528 |
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DS585PP5
81
CS42526
12.1.3
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 as their leads and the required longer circuit board traces add
undesirable inductance to the circuit. Surface mount ceramic capacitors are a good choice because 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 preferred. 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.
Capacitor Selection
12.1.4
Board layout and capacitor choice affect each other and determine the performance of the PLL. Figure
29 illustrates a suggested layout for the PLL filter components and for bypassing the analog supply
voltage. 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.
Circuit Board Layout
V
A
L
CFILT
R
CRIP
0.1 μF
0.01 μF
10 μF
= via to ground plane
Figure 29. Recommended Layout Example
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| CDB4299 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd AC’97 CODEC w/SRC RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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