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參數(shù)資料
| 型號(hào)： | LM3916N-1 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動(dòng)器 |
| 英文描述： | 6 PIN MINI DIN CABLE MM 50FT |
| 中文描述： | LED DISPLAY DRIVER, PDIP18 |
| 封裝： | PLASTIC, DIP-18 |
| 文件頁數(shù)： | 12/27頁 |
| 文件大?。?/td> | 509K |
| 代理商： | LM3916N-1 |
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Application Hints
(Continued)
both drivers (10V in the example) and amplify the input sig-
nal by 16 dB ahead of the LM3915. Alternatively, instead of
amplifying, input signals of sufficient amplitude can be fed di-
rectly to the LM3916 and attenuated by 16 dB to drive the
LM3915.
To extend this approach to get a 70 dB display, another
30 dB of amplification must be placed in the signal path
ahead of the lowest LM3915. Extreme care is required as the
lowest LM3915 displays input signals down to 2 mV! Several
offset nulls may be required. High currents should not share
the same path as the low level signal. Also power line wiring
should be kept away from signal lines.
TIPS ON REFERENCE VOLTAGE AND LED CURRENT
PROGRAMMING
Single Driver
The equations in Figure 10 illustrate how to choose resistor
values to set reference voltage for the simple case where no
LED intensity adjustment is required.ALED current of 10 mA
to 20 mA generally produces adequate illumination. Having
10V full-scale across the internal voltage divider gives best
accuracy by keeping signal level high relative to the offset
voltage of the internal comparators. However, this causes 1
DS007971-15
V
REF2
7.89V
FIGURE 8. Low Cost Circuit for 40 dB Display
DS007971-16
FIGURE 9. Improved Circuit for 40 dB Display
L
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3916N-1 | 制造商:Texas Instruments 功能描述:LED BAR GRAPH DRIVER 3916 DIP18 |
| LM3916N-1/HALF | 制造商:Texas Instruments 功能描述:LED BAR GRAPH DRIVER 3916 DIP18 |
| LM3916N-1/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 DOT/BAR DISPLAY DRVR RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM391N-100 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM391 Audio Power Driver |
| LM391N-100/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single Audio Amplifier |
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