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參數資料
| 型號： | W682388 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | Codec |
| 英文描述： | Pro-X⑩ CODEC Layout Guideline |
| 中文描述： | 親X⑩編解碼器布局指南 |
| 文件頁數： | 7/8頁 |
| 文件大小： | 361K |
| 代理商： | W682388 |
W682388 Layout Guideline Rev 1.3
5. Layout Check List
Perform the following steps to have high quality, low-noise performance:
1. Copy the W682388 evaluation board/example layout as closely as possible.
2. Place the DC-TO-DC converter near pins 17-32 of the W682388 device as on the evaluation
board.
3. Put no power/ground planes under the protection circuitry in the front end.
4. Isolate the Analog front end power (VDD1, VDD2, VDD3, VDD4) and ground (GND1, GND2,
GND3, GND4, VSSP) by connecting them to the main 3.3v / GND planes using ferrite beads.
5. Route analog traces away from digital traces. Stay away from pins 17 and 32 of W682388.
6. VDD capacitors should be placed close to the power and ground pins. Connect all power and
ground connections between the power pins and the bypass capacitors together with short
traces.
7. Use separate GND and digital trace layers if the board has four or more layers, ideally
separated by a power/GND plane.
8. Place the sense resistors (R18, R19, R20, R21, R22, R23, R24, R25, R26, R27), the IREF
resistor (R31) and transconductance resistors (R29 & 30) as close to the pins as possible.
Have no digital traces in path.
9. Width of high current traces (i.e. DC-to-DC converter, etc.), should be at least 50 mils.
10. Width of the Tip and Ring traces must be as wide as possible.
11. Keep the components and traces related to the DC-to-DC converter isolated. Avoid running a
trace away from these components and traces.
12. Each DC-TO-DC converter must have a separate ground trace leading back to the supply as
shown in Figure 1.
13. Minimize the surface area formed by the current sense resistor, Ris (R38), and the voltage
sense resistors Rdh and Rdl (R41& R42). Place the voltage sense resistors close to the
W682388. Route the voltage sensing trace between Ris to the pair Rdh and Rdl tightly in
parallel or on top of each other on two separate layers.
Perform the following steps to optimize the analog front end:
1. Place the discrete transistors near pins 49-65 of the W682388 similar to the evaluation board.
2. Compensation capacitors should be placed as follows:
1. C9 as close as possible to the collector of transistors QR1_C1 and QR3_C1.
2. C12 as close as possible to the collector of transistors QT1_C1 and QT3_C1.
3. C8 as close as possible to the collector of transistors QR1_C2 and QR3_C2.
4. C5 as close as possible to the collector of transistors QT1_C2 and QT3_C2.
The AFE transistors QR3/QT3 (SOT-223) and QR1/QT1 (SOT-89) should have exposed copper pads to
help reduce the thermal resistance of these components. The amount of copper used for the heat sink in
combination with the surface area of the PCB will improve the heat dissipation of the transistor package.
One way to increase the copper area when board space is limited is to connect the pad used for the heat
sink by using multiple layers. A top and bottom side can be used with multiple vias connecting them
together. The optimal copper area to heat sink a SOT-223 is 1 sq inch. This approach is similar to heat
sinking used for the QFN package. (Refer to Section 4 on QFN grounding)
AN-CS006a_W682388 PCB Layout.doc
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W682388_1 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Dual Programmable Extended CODEC/SLIC |
| W682388DG | 功能描述:IC PROG DUAL CODEC/SLCC 64-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W682388DG TR | 功能描述:IC PROG DUAL CODEC/SLCC 64-LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
| W682388EVB | 功能描述:KIT EVAL FOR W682388 RoHS:否 類別:編程器，開發系統 >> 過時/停產零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關產品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| W682388YG | 功能描述:IC PROG DUAL CODEC/SLCC 64-QFN RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標準包裝:2,500 系列:- 類型:立體聲音頻 數據接口:串行 分辨率（位）:18 b ADC / DAC 數量:2 / 2 三角積分調變:是 S/N 比，標準 ADC / DAC (db):81.5 / 88 動態范圍，標準 ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應商設備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR) |
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