LM3914 Dot Bar Display Driver IC DIP-18

LM3914 Dot Bar Display Driver IC DIP-18 is an analog-controlled LED driver that provides a visual representation of an input voltage level using LEDs in dot or bar mode. It is widely used in battery level indicators, audio level meters, and other monitoring applications.

Key Features of LM3914:

• • Linear Analog Display: Directly drives 10 LEDs based on input voltage.
  • Dot or Bar Mode: Selectable display configuration.
  • Adjustable Reference Voltage: Supports different voltage levels.
  • Low Power Consumption: Requires minimal external components.
  • Expandable: Can be cascaded for more LED indicators.

Technical Specifications of LM3914:

• • Operating Voltage: 3V – 18V
  • Input Signal Range: 1.2V – 12V
  • LED Drive Current: Adjustable (2mA – 30mA)
  • Reference Voltage: 1.2V – 12V
  • Modes: Dot or Bar Display
  • Package: DIP-18, SOIC-18

Schematic Diagram and Pinout of LM3914:

• • Pinout:
    • Pin 1 (LED1) – Pin 10 (LED10): LED outputs.
    • Pin 11 (Mode Select): Selects dot or bar mode.
    • Pin 12 (V-): Ground connection.
    • Pin 13 (Reference Voltage Output): Adjustable reference voltage.
    • Pin 14 (Reference Voltage Input): Sets the reference level.
    • Pin 15 (High Voltage Reference): Upper voltage limit.
    • Pin 16 (V+): Power supply input.
    • Pin 17 (Signal Input): Analog input voltage.
    • Pin 18 (Low Voltage Reference): Lower voltage limit.
  • Schematic Diagram: Internal voltage divider and comparator circuit for LED control.

Applications of LM3914:

• • Battery Level Indicators: Visual display of battery charge.
  • Audio Level Meters: Used in VU meters for audio signals.
  • Temperature Monitoring: Displays temperature levels.
  • Voltage Level Indicators: Monitors voltage in electronic circuits.

Equivalent Models of LM3914:

• • LM3915: Logarithmic LED driver for audio level meters.
  • LM3916: Optimized for VU meter applications.

Datasheet:

• • Download LM3914 Datasheet

Keywords for LM3914:

• • LM3914
  • LED Bar Graph Driver
  • Analog Display Driver
  • Battery Level Indicator IC
  • Dot/Bar Display IC

Package Includes:

• • 1 x LM3914 Dot Bar Display Driver IC (DIP-18 Package)