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參數(shù)資料
| 型號(hào)： | SAA7138 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | The Digital Video Decoder/Encoder Modules(數(shù)字視頻譯碼器/編碼器模塊) |
| 中文描述： | 數(shù)字視頻解碼器/編碼器模塊（數(shù)字視頻譯碼器/編碼器模塊） |
| 文件頁數(shù)： | 21/53頁 |
| 文件大?。?/td> | 456K |
| 代理商： | SAA7138 |
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Module System: 7128MOD2
Philips Semiconductors
21
Application Note
AN 97085
4.
Tips for a PCB layout
4.1
Analog and digital signal processing
- use separate ground planes for analog and digital supply in one layer (no overlapping!)
- use separate supply planes for analog and digital with the same shape (or smaller) as ground
(no overlap of analog supply with digital ground and vice versa!)
- if there are different (asynchronous) clock domains, use separate ground and supply planes
(place the analog areas not in a direct neighborhood; separate the clock domains)
- always use the inner layers for ground and supply planes (no signal layer in between!)
- try to keep digital signals away from analog areas
- place analog areas close to the border of a PCB
- avoid long tracks for analog signals
- place decoupling capacitors (22nF to 100nF) close to the power pins of the ICs
- prepare several provisions for connecting places for analog and digital ground on the PCB for
further optimization on the final board.
4.2
IIC bus
always supply the I2C-bus with pull-up resistors, but avoid too high currents. The values of resistors
Rp and Rs depend on the following parameters:
- supply voltage
- bus capacitance
- number of connected devices (input current + leakage current)
please see I2C-bus specification (e.g. chapter 10.1 in the Philips data handbook: ’Maximum and
minimum values of resistors Rp and Rs’).
4.3
Application information
Application environment of all possible encoders on this board is shown at the end of the datasheet
of the respective device.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7140A | High Performance Scaler HPS |
| SAA7140B | High Performance Scaler HPS |
| SAA7146AHZ | Circular Connector; No. of Contacts:66; Series:MS27472; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:18; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:18-35 RoHS Compliant: No |
| SAA7146AH | .012UF/400VDC METAL POLY CAP |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7140A | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:High Performance Scaler HPS |
| SAA7140B | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:High Performance Scaler HPS |
| SAA7144HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Quadruple video input processor |
| SAA7145 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:PCI Multimedia Bridge |
| SAA7146 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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