LM3915 LED Dot/Bar Display Driver IC DIP 18 Package

LM3915 LED Dot/Bar Display Driver IC DIP 18 Package 

The LM3915 is a LED dot/bar display driver IC designed to display analog signal levels in a visually intuitive form. It drives 10 LEDs in either dot mode or bar mode, making it ideal for applications such as audio level meters and signal strength indicators.

Unlike linear display drivers, the LM3915 features a logarithmic (3 dB per step) response, which closely matches the human perception of sound intensity. The IC integrates a precision voltage reference, comparator ladder, and LED drivers, allowing operation with a minimal number of external components. Packaged in a DIP-18 through-hole package, the LM3915 is ideal for prototyping, educational, and industrial display applications.

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Features

• Drives 10 LEDs in dot or bar display mode
• Logarithmic scale (3 dB per step) suitable for audio signals
• Built-in precision voltage reference
• On-chip LED current regulation
• Adjustable display sensitivity
• Wide supply voltage range
• Low power consumption
• Cascadable for extended displays
• Simple external component requirement
• DIP-18 package for easy PCB mounting and prototyping

Applications

• Audio level (VU) meters
• Sound and music visualizers
• Signal strength indicators
• Battery and power level indicators
• Test and measurement equipment
• Industrial monitoring panels
• Consumer audio equipment

lm3915-ic-datasheet