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LM3914VX

更新时间： 2024-11-06 12:28:19
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德州仪器 - TI 显示驱动器
页数 文件大小 规格书
29页 790K
描述
LM3914 Dot/Bar Display Driver

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中文翻译

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LM3914VX 技术参数

是否Rohs认证： 不符合生命周期：Obsolete
零件包装代码：QLCC包装说明：QCCJ, LDCC20,.4SQ
针数：20Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：1 week风险等级：5.04
其他特性：SELECTABLE DOT MODE数据输入模式：ANALOG
显示模式：BAR GRAPH接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：S-PQCC-J20JESD-609代码：e0
长度：8.89 mm湿度敏感等级：2A
复用显示功能：NO位数/字符：10-DIGIT
功能数量：1区段数：10
端子数量：20最高工作温度：70 °C
最低工作温度：封装主体材料：PLASTIC/EPOXY
封装代码：QCCJ封装等效代码：LDCC20,.4SQ
封装形状：SQUARE封装形式：CHIP CARRIER
峰值回流温度（摄氏度）：250认证状态：Not Qualified
座面最大高度：4.57 mm子类别：Display Drivers
最大供电电压：20 V最小供电电压：3 V
标称供电电压：5 V表面贴装：YES
技术：BIPOLAR温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：J BEND
端子节距：1.27 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：8.89 mm
Base Number Matches：1

LM3914VX 数据手册

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LM3914  
www.ti.com  
SNVS761B –JANUARY 2000–REVISED MARCH 2013  
LM3914 Dot/Bar Display Driver  
Check for Samples: LM3914  
Versatility was designed into the LM3914 so that  
1
FEATURES  
controller, visual alarm, and expanded scale functions  
are easily added on to the display system. The circuit  
can drive LEDs of many colors, or low-current  
incandescent lamps. Many LM3914s can be  
“chained” to form displays of 20 to over 100  
segments. Both ends of the voltage divider are  
externally available so that 2 drivers can be made  
into a zero-center meter.  
2
•
•
Drives LEDs, LCDs or Vacuum Fluorescents  
Bar or Dot Display Mode Externally Selectable  
by User  
•
•
•
•
•
Expandable to Displays of 100 Steps  
Internal Voltage Reference from 1.2V to 12V  
Operates with Single Supply of Less than 3V  
Inputs Operate Down to Ground  
The LM3914 is very easy to apply as an analog  
meter circuit. A 1.2V full-scale meter requires only 1  
resistor and a single 3V to 15V supply in addition to  
the 10 display LEDs. If the 1 resistor is a pot, it  
becomes the LED brightness control. The simplified  
block diagram illustrates this extremely simple  
external circuitry.  
Output Current Programmable from 2 mA to 30  
mA  
•
•
•
No Multiplex Switching or Interaction Between  
Outputs  
Input Withstands ±35V without Damage or  
False Outputs  
When in the dot mode, there is a small amount of  
overlap or “fade” (about 1 mV) between segments.  
This assures that at no time will all LEDs be “OFF”,  
and thus any ambiguous display is avoided. Various  
novel displays are possible.  
LED Driver Outputs are Current Regulated,  
Open-collectors  
•
•
Outputs can Interface with TTL or CMOS Logic  
The Internal 10-step Divider is Floating and  
can be Referenced to a Wide Range of  
Voltages  
Much of the display flexibility derives from the fact  
that all outputs are individual, DC regulated currents.  
Various effects can be achieved by modulating these  
currents. The individual outputs can drive a transistor  
as well as a LED at the same time, so controller  
functions including “staging” control can be  
DESCRIPTION  
The LM3914 is a monolithic integrated circuit that  
senses analog voltage levels and drives 10 LEDs,  
providing a linear analog display. A single pin  
changes the display from a moving dot to a bar  
graph. Current drive to the LEDs is regulated and  
programmable, eliminating the need for resistors.  
This feature is one that allows operation of the whole  
system from less than 3V.  
performed. The LM3914 can also act as  
programmer, or sequencer.  
a
The LM3914 is rated for operation from 0°C to +70°C.  
The LM3914N-1 is available in an 18-lead PDIP  
(NFK) package.  
The following typical application illustrates adjusting  
of the reference to a desired value, and proper  
grounding for accurate operation, and avoiding  
oscillations.  
The circuit contains its own adjustable reference and  
accurate 10-step voltage divider. The low-bias-current  
input buffer accepts signals down to ground, or V−,  
yet needs no protection against inputs of 35V above  
or below ground. The buffer drives 10 individual  
comparators referenced to the precision divider.  
Indication non-linearity can thus be held typically to  
½%, even over a wide temperature range.  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2000–2013, Texas Instruments Incorporated  
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LM3914VX 替代型号

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