LM3914 - Dot/Bar Display Driver [Original]

LM3914 Monolithic Dot/Bar Display Driver IC

The LM3914 is a monolithic integrated circuit for analog display applications. It senses analog voltage levels. The IC drives up to 10 LEDs for linear analog visual output. Single-pin control selects between bar graph and moving dot display modes. Integrated LED current drive is regulated and programmable, eliminating external current-limiting resistors. Operation is possible from supply voltages as low as 3V. The architecture supports expansion to displays with up to 100 steps. Inputs withstand ±35V. Outputs are compatible with TTL and CMOS logic.

Specifications:

• IC Type: Monolithic Integrated Circuit
• Display Type: Linear Analog (Dot/Bar)
• LEDs Driven: 10
• Minimum Supply Voltage: < 3V
• Output Current (Programmable): 2 mA to 30 mA
• Internal Voltage Reference: 1.2V to 12V
• Input Voltage Withstand: ±35V
• Output Type: Current regulated, open-collector
• Logic Compatibility: TTL/CMOS

Key features and benefits:

• Provides linear analog display from analog voltage input
• Drives 10 LEDs directly; compatible with LCDs/VFDs via external circuitry
• User-selectable bar or dot display mode via a single control pin
• Expandable for displays up to 100 steps
• Internal voltage reference adjustable from 1.2V to 12V
• Operates with a single supply voltage as low as 3V
• Programmable LED output current from 2 mA to 30 mA
• Inputs withstand ±35V

Applications:

• Battery voltage level indicators
• Audio level meters (VU meters)
• Temperature monitoring displays
• Light intensity meters
• Analog panel meter replacements
• Industrial process monitoring

Frequently Asked Questions:

Q: What is the minimum supply voltage for the LM3914?
A: The LM3914 operates from supply voltages as low as 3V.

Q: Is the LM3914 display expandable?
A: Yes, the LM3914 supports expansion to displays with up to 100 steps.

Q: Are external current-limiting resistors required for LEDs with the LM3914?
A: No, the LM3914 features an integrated, regulated, and programmable LED current drive, eliminating the need for external current-limiting resistors.

Package Includes:

*Image shown is a representation only.

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