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參數資料
| 型號： | CDB8420 |
| 廠商： | Cirrus Logic Inc |
| 文件頁數： | 87/94頁 |
| 文件大?。?/td> | 0K |
| 描述： | EVALUATION BOARD FOR CS8420 |
| 標準包裝： | 1 |
| 主要目的： | 音頻，采樣率轉換器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | CS8420 |
| 主要屬性： | 帶數字音頻發(fā)射器和接收器的采樣率轉換器 |
| 次要屬性： | 44.1、48、96 kHz 輸出采樣率，AES/EBU，S/PDIF，EIAJ-340，GUI |
| 已供物品： | 板 |
| 相關產品： | 598-1125-5-ND - IC SAMPLE RATE CONVERTER 28SOIC |
| 其它名稱： | 598-1782 |
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88
DS245F4
CS8420
16.2.2
Capacitor Selection
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 FILT pin to minimize trace inductance. For
CRIP, a C0G or NPO dielectric is recommended, and for CFILT, an X7R dielectric is preferred. Avoid ca-
pacitors with large temperature coefficients, or capacitors with high dielectric constants, that are sensitive
to shock and vibration. These include the Z5U and Y5V dielectrics.
16.2.3
Circuit Board Layout
Board layout and capacitor choice affect each other and determine the performance of the PLL. Figure
42 contains a suggested layout for the PLL filter components and for bypassing the analog supply voltage.
The 0.1 F bypass capacitor is in a 1206 form factor. RFILT and the other three capacitors are in an 0805
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 VA+ and AGND traces
extend back to their origin and are shown only in truncated form in the drawing.
16.3
Component Value Selection
When transitioning from one revision of the part another, component values need to be changed. It is man-
datory for customers to change the external PLL component values when transitioning from revision D to
revision D1.
16.3.1
Identifying the Part Revision
The first line of the part marking on the package indicates the part number and package type
CS8420-xx. Table 17 shows a list of part revisions and their corresponding second line part marking,
which indicates what revision the part is.
Table 17. Second Line Part Marking
Revision
Pre-October 2002 (10-Digit)
New (12-Digit)
D
Zxxxxxxxxx
ZFBADXxxxxxx
D1
Rxxxxxxxxx
RFBAD1xxxxxx
VA+
AGND
FILT
Cfilt
1000
pF
.1F
R
fil
t
Crip
Figure 42. Recommended Layout Example
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相關代理商/技術參數 |
參數描述 |
|---|---|
| CDB8421 | 功能描述:音頻 IC 開發(fā)工具 2-Ch 32-Bit 192kHz sample rate converte 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 |
| CDB8422 | 功能描述:界面開發(fā)工具 Eval Bd 192kHz SRC S/PDIF Receiver RoHS:否 制造商:Bourns 產品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| CDB8427 | 功能描述:音頻 IC 開發(fā)工具 Eval Bd 96kHz Dig. Audio Transcvr 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 |
| CDB8952 | 制造商:Cirrus Logic 功能描述:NOT RECOMMENDED FOR NEW DESIGNS - USE CDB8952T - Bulk 制造商:Cirrus Logic 功能描述:Tools Development kit Kit Con |
| CDB8952T | 功能描述:以太網開發(fā)工具 Eval Bd 100BASE-TX/ 10BASE-T Transceiver RoHS:否 制造商:Micrel 產品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓: |
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