LM3916 VU Meter Display Driver Datasheet

Introduction

The LM3916 VU Meter Display Driver IC is a precision analog display driver specifically designed for audio level metering applications. It converts an analog voltage input into a visual LED display that follows the standard VU meter scale used in professional audio equipment. Unlike the LM3914 (linear response) and LM3915 (logarithmic 3 dB/step response), the LM3916 is uniquely calibrated to provide a VU meter response curve, making it the perfect choice for mixing consoles, recording equipment, stereo amplifiers, and audio processors where accurate level indication is critical.

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One of the standout features of the LM3916 VU Meter IC is its ability to directly drive 10 LEDs, LCDs, or vacuum fluorescent displays in either dot mode or bar mode. In dot mode, only one LED lights up at a time, saving power, while in bar mode, multiple LEDs illuminate simultaneously to create a smooth, continuous display. This flexibility makes it suitable for both portable battery-powered devices and professional studio equipment. The IC can also be cascaded to drive more LEDs, allowing extended VU meter displays that cover wider dynamic ranges.

LM3916 VU Meter Display Driver Datasheet

The operating voltage range of the LM3916 is typically 3V to 25V, providing compatibility with a variety of power supplies. It comes with an internal voltage reference adjustable from 1.2V to 12V, ensuring precise calibration of input levels. Additionally, the IC includes built-in LED current regulation, eliminating the need for external current-limiting resistors. Programmable LED current from 1 mA to 30 mA per LED guarantees uniform brightness across the entire display, regardless of supply fluctuations, making the LM3916 both efficient and reliable.

Audio engineers, DIY enthusiasts, and electronics designers choose the LM3916 VU Meter Display Driver for its accuracy, ease of use, and audio-optimized response curve. It provides a clear and responsive visual representation of sound levels, helping users monitor signal peaks, prevent distortion, and balance audio output effectively. With its robust design, high input voltage tolerance, and ease of cascading for extended displays, the LM3916 IC remains one of the most popular choices for audio level meters, sound visualizers, and professional VU meter circuits.

LM3916 Pinout

LM3916 Key Features

• Fast Responding Electronic VU Meter
• Drivers LEDs, LCDs, or Vacuum Fluorescents
• Bar or Dot Display Mode Externally Selectable by User
• Expandable to Displays of 70 dB
• Internal Voltage Reference from 1.2V to 12V
• Operates with Single Supply of 3V to 25V
• Inputs Operate Down to Ground
• Output Current Programmable from 1 mA to 30 MA
• Input Withstands ±35V without Damage or False Outputs
• Outputs are Current Regulated, Open Collectors
• Directly Drives TTL or CMOS
• The Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages
• The LM3916 is Rated for Operation from 0°C to +70°C. The LM3916N-1 is Available in an 18- lead PDIP Package.

LM3916 Specifications/Characteristics

LM3916 VU Meter Display Driver Pinout

More Circuit Layouts

Key Applications of LM3916

• Audio level indicators (VU meters)
• Stereo amplifier output level displays
• Recording studio equipment and mixing consoles
• Signal strength indicators for audio systems
• Portable audio devices and music systems
• Professional audio processors and equalizers
• Home theater and Hi-Fi system level meters
• Sound pressure level (SPL) monitors
• Power supply monitoring with visual indication
• DIY electronics and hobby audio projects

Equivalent of LM3916 VU Meter Display Driver

LM3914, LM3915

Datasheet of LM3916 VU Meter Display Driver

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