Menu
Your Cart
Sorry for your inconvenience,shipping will be delayed.

LM3914 Dot or Bar Display Driver IC

LM3914 Dot or Bar Display Driver IC

Product Images shown are for illustrative purposes only and may differ from the actual product.
LM3914 Dot or Bar Display Driver IC
₹42.00
  • Stock: 1
  • Model: LM3914 Dot or Bar Display Driver IC
  • Weight: 1.50g
  • SKU: 489-AE
  • Location: India

LM3914 Dot or Bar Display Driver IC

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 moving dot to a bar graph. The 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 an accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to the 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 display system. The circuit can drive LEDs of many colours, 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-centre 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 external 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 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˚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 the desired value, and proper grounding for accurate operation, and avoiding oscillations.

Features:

  • Drives LEDs, LCDs or vacuum fluorescents
  • Bar or dot display mode externally selectable by the 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 30 mA
  • 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

Specification:

  •  IC, DRIVER, LED, 3V
  • LED Driver Application: Bar Graph Meter, Expanded Scale Meter
  • No. of Outputs: 10
  • Output Current: 30mA
  • Output Voltage: 1.34V
  • Input Voltage: 1.2V to 12V
  • Dimming Control Type: Analogue
  • Operating Temperature Range: 0°C to +70°C
  • Driver Case Style: DIP
  • SVHC: No SVHC
  • Base Number: 3914
  • Device Type: LED
  • Interface Type: Common Anode
  • LED Display Type: Dot / Bar
  • No. of Pins: 18
  • No. of Segments: 10
  • Operating Temperature Max: 70°C
  • Operating Temperature Min: 0°C
  • Output Voltage Max: 1.34V
  • Package / Case: MDIP
  • Supply Voltage Max: 25V
  • Supply Voltage Min: 3V
  • Termination Type: Through Hole

Write a review

Note: HTML is not translated!
Bad Good

Most of our orders are shipped within 24 Hrs and delivered in 2-7 days in India. In cases where items in the order are not available for immediate dispatch or delivery has to be made in a remote location, it can take longer. The customer will be informed of the same through email.

We use most trusted or whichever is available in your location carriers for consignment deliveries. Tracking details will be emailed to you within 24-48 hours. Though in some cases tracking information may not be available online.

We use cookies and other similar technologies to improve your browsing experience and the functionality of our site. Privacy Policy.