HLF LM3915 – Dot/Bar Display Driver (DIP18) | Audio Level Display Driver IC | 3V–20V, 0°C to +70°C | Through-Hole Package

The HLF LM3915 (DIP18) is a logarithmic analog display driver that drives 10 LEDs, LCDs, or vacuum fluorescent displays in dot or bar mode. It translates an analog input signal into a logarithmic scale display, providing 3 dB per step, ideal for visualizing audio signal levels in VU meters or sound intensity indicators.

With its built-in reference voltage, current regulator, and mode control, the LM3915 simplifies design while offering precise, wide-range signal level indication. It’s widely used in audio, instrumentation, and monitoring systems.

Key Features:

• Function: Logarithmic 10-Level Dot/Bar Display Driver

• Technology: Analog Display Driver

• Operating Voltage: 3V – 20V

• Operating Temperature: 0°C to +70°C

• Package Type: DIP18 (Dual In-Line Package)

• Mounting Type: Through-Hole

• 10-Step Logarithmic Scale (3 dB per Step)

• Drives LEDs, LCDs, or VFDs Directly

• Selectable Dot or Bar Display Mode

• Adjustable Reference Voltage and LED Current

• Internal Voltage Regulator and Divider Network

• Low Power Operation and High Accuracy

Applications:

• Audio Level and VU Meters

• Power Level Indicators

• Signal Strength Displays

• Spectrum and Sound Analyzers

• Industrial and Consumer Display Systems