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Description
LM3914 Dot/Bar Display Driver
Package: MDIP
No of Pins: 18
Qty per Container: 20/Rail
All product names, trademarks, brands and logos used on this site are the property of their respective owners. The depiction, description or sale of products featuring these names, trademarks, brands and logos is for identification purposes only and is not intended to indicate any affiliation with or authorization by any rights holder.
FEATURES
● 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
● Output Current Programmable from 2 mA to 30mA
● No Multiplex Switching or Interaction Between outputs
● Input Withstands ±35V without Damage or False outputs
● 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
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.
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 1/2%, 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 disp1ay system. The circuit can drive LEDs of many co1ors, 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.
The LM3914 is very easy to apply as an analog meter circuit.A 1.2v full-sca1e meter requires only 1resistor and a single 3V to 15V supply in addition to the 10 disp1ay LEDs. If the 1 resistor is a pot, it becomes the LED brightness control. The simplified block diagram illustrates this extremely simple external circuitry.
When in the dot mode, there is a small amount of over1ap or “fade” (about 1mV) 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.
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 performed. The LM3914 can also act as a programmer, or sequencer.
The LM3914 is rated for operation from 0℃ to +70℃. 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.
Preview of the first 3 pages of the data sheet
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204 buyer reviews from Australia
Paul
Length of registration:14 years
nicely packaged and on time
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10/12/2022
Prasad
Length of registration:3 years
Product as described great quality and fast delivery recommend!!
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09/28/2022
Harry Tan
Length of registration:1 years
As described, good service, A+++
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04/07/2017
Steve Alford
Length of registration:6 years
Very good service, fast delivery Thank you
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03/30/2017
thomas Nguyen
Length of registration:7 years
great service, thank you
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12/08/2016
Ray Lockhart
Length of registration:13 years
it arrived and is original
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12/01/2016
Garth James
Length of registration:7 years
Look good.
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11/22/2016
Osman Mehmed
Length of registration:12 years
Excellent
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11/05/2016
Lennod Greene
Length of registration:1 years
Thanks
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10/20/2016
John Sobon
Length of registration:10 years
Top and excellent service as always!
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10/13/2016
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Warranty
All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
LM3914N-1/NOPB
LM3914N-1/NOPB has several brands around the world that may have alternate names for LM3914N-1/NOPB due to regional differences or acquisition. LM3914N-1/NOPB may also be known as the following names:
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