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參數(shù)資料
| 型號： | LM246D |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS |
| 中文描述： | 可編程四雙極運(yùn)算放大器 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大?。?/td> | 423K |
| 代理商： | LM246D |
Application Hints
(Continued)
NSC DEMONSTRATION BOARD
Figure 12 shows the routing and component placement on
the NSC LM126X/246X/LM2479/80 demonstration board.
The schematic of the board is shown in Figure 10and Figure
11 This board provides a good example of a layout that can
be used as a guide for future layouts. Note the location of the
following components:
C16, C19—V
bypass capacitor, located very close to
pin 4 and ground pins
C17, C20—V
BB
bypass capacitors, located close to pin 8
and ground
C46, C47, C48—V
bypass capacitors, near LM2465
and V
CC
clamp diodes. Very important for arc protection.
The routing of the LM2465 outputs to the CRT is very critical
to achieving optimum performance. Figure 13 shows the
routing and component placement from pin 3 of the LM2465
to the blue cathode. Note that the components are placed so
that they almost line up from the output pin of the LM2465 to
the blue cathode pin of the CRT connector. This is done to
minimize the length of the video path between these two
components. Note also that D8, D9, R24 and D6 are placed
to minimize the size of the video nodes that they are
attached to. This minimizes parasitic capacitance in the
video path and also enhances the effectiveness of the
protection diodes. The anode of protection diode D8 is
connected directly to a section of the the ground plane that
has a short and direct path to the LM2465 ground pins. The
cathode of D9 is connected to V
very close to decoupling
capacitor C48 (see Figure 13) which is connected to the
same section of the ground plane as D8. The diode
placement and routing is very important for minimizing the
voltage stress on the LM2465 during an arcover event.
Lastly, notice that S3 is placed very close to the blue cathode
and is tied directly to CRT ground.
L
www.national.com
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM246N | PROGRAMMABLE QUAD BIPOLAR OPERATIONAL AMPLIFIERS |
| LM246DT | OP-AMP|QUAD|BIPOLAR|SOP|16PIN|PLASTIC |
| LM246J | Voltage-Feedback Operational Amplifier |
| LM346DT | OP-AMP|QUAD|BIPOLAR|SOP|16PIN|PLASTIC |
| LM346J | Voltage-Feedback Operational Amplifier |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM246DT | 制造商:STMicroelectronics 功能描述:OP AMP QUAD GP 22V 16SOIC - Tape and Reel |
| LM246J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM246N | 功能描述:運(yùn)算放大器 - 運(yùn)放 Quad Programmable RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LM2470 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 7.0 ns CRT Driver |
| LM2470TA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Monolithic Triple 7.0 ns CRT Driver |
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