Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

LM3914N-1 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM3914N-1
Description  Dot/Bar Display Driver
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3914N-1 Datasheet(HTML) 1 Page - National Semiconductor (TI)

  LM3914N-1 Datasheet HTML 1Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 2Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 3Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 4Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 5Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 6Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 7Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 8Page - National Semiconductor (TI) LM3914N-1 Datasheet HTML 9Page - National Semiconductor (TI) Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 19 page
background image
LM3914
Dot/Bar Display Driver
General 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 mov-
ing 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.
The circuit contains its own adjustable reference and accu-
rate 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 12%, even over a wide temperature range.
Versatility was designed into the LM3914 so that 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 seg-
ments. Both ends of the voltage divider are externally avail-
able so that 2 drivers can be made into a zero-center meter.
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 ex-
ternal circuitry.
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 dis-
play is avoided. Various novel displays are possible.
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 indi-
vidual outputs can drive a transistor as well as a LED at the
same time, so controller functions including “staging” control
can be performed. The LM3914 can also act as a program-
mer, or sequencer.
The LM3914 is rated for operation from 0˚C to +70˚C. The
LM3914N-1 is available in an 18-lead molded (N) package.
The following typical application illustrates adjusting of the
reference to a desired value, and proper grounding for accu-
rate operation, and avoiding oscillations.
Features
n
Drives LEDs, LCDs or vacuum fluorescents
n
Bar or dot display mode externally selectable by user
n
Expandable to displays of 100 steps
n
Internal voltage reference from 1.2V to 12V
n
Operates with single supply of less than 3V
n
Inputs operate down to ground
n
Output current programmable from 2 mA to 30 mA
n
No multiplex switching or interaction between outputs
n
Input withstands ±35V without damage or false outputs
n
LED driver outputs are current regulated,
open-collectors
n
Outputs can interface with TTL or CMOS logic
n
The internal 10-step divider is floating and can be
referenced to a wide range of voltages
January 2000
© 2000 National Semiconductor Corporation
DS007970
www.national.com


Similar Part No. - LM3914N-1

ManufacturerPart #DatasheetDescription
logo
Texas Instruments
LM3914N-1 TI1-LM3914N-1 Datasheet
790Kb / 29P
[Old version datasheet]   LM3914 Dot/Bar Display Driver
LM3914N-1/NOPB TI1-LM3914N-1/NOPB Datasheet
790Kb / 29P
[Old version datasheet]   LM3914 Dot/Bar Display Driver
More results

Similar Description - LM3914N-1

ManufacturerPart #DatasheetDescription
logo
National Semiconductor ...
LM3915 NSC-LM3915 Datasheet
1Mb / 25P
   Dot/Bar Display Driver
LM3916 NSC-LM3916 Datasheet
509Kb / 27P
   Dot/Bar Display Driver
LM3914 NSC-LM3914_03 Datasheet
809Kb / 22P
   Dot/Bar Display Driver
logo
Texas Instruments
LM3914N-1 TI1-LM3914N-1 Datasheet
790Kb / 29P
[Old version datasheet]   LM3914 Dot/Bar Display Driver
LM3915N-1 TI-LM3915N-1 Datasheet
1Mb / 31P
[Old version datasheet]   LM3915 Dot/Bar Display Driver
LM3916 TI1-LM3916 Datasheet
1Mb / 32P
[Old version datasheet]   LM3916 Dot/Bar Display Driver
LM3915N-1 TI1-LM3915N-1 Datasheet
1Mb / 31P
[Old version datasheet]   LM3915 Dot/Bar Display Driver
logo
NTE Electronics
NTE1549 NTE-NTE1549 Datasheet
29Kb / 4P
   Integrated Circuit Dot/Bar Display Driver
NTE1508 NTE-NTE1508 Datasheet
31Kb / 3P
   Integrated Circuit 10-Step Dot/Bar Display Driver for Linear Scale
NTE1509 NTE-NTE1509 Datasheet
30Kb / 4P
   Integrated Circuit 10-Step Dot/Bar Display Driver for Logarithmic Scale
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com