Overview
The LM3914VX/NOPB is a versatile dot/bar display driver that converts an analog input voltage into a 10-segment LED visual indicator. It integrates a programmable reference and LED current regulator, allowing each output segment to deliver 2 mA to 30 mA without needing external resistors. The device supports both dot mode for low-power indicator applications and bar mode for continuous level display. With an internal 1.28 V reference, input measurement capability up to 12 V, and an operating temperature range of –40°C to +85°C, the LM3914VX/NOPB serves as a reliable solution for battery level indication, panel meters, and signal monitoring instruments.
Core Parameters
| Parameter | Specification |
|---|---|
| Number of Outputs | 10 LED drivers |
| Reference Voltage | 1.28 V internal reference |
| LED Current | Adjustable 2 mA to 30 mA |
| Input Voltage Range | 0 to 12 V |
| Operating Modes | Dot mode / Bar mode |
| Operating Temperature | –40°C to +85°C |
| Supply Voltage | 3 V to 25 V |
| Package | NSOIC-18 (VX) |
Features
- Directly drives 10 LEDs with consistent brightness
- Adjustable LED current (2–30 mA) without series resistors
- Selectable dot or bar display modes
- Internal 1.28 V reference with external programmability
- Supports analog measurements up to 12 V
- Low power consumption in dot mode
- Wide supply range from 3 V to 25 V
- Ideal for battery meters, power indicators, and panel displays
- Robust industrial-grade temperature performance
Typical Application Scenarios
| Application | Why LM3914VX/NOPB Fits |
|---|---|
| Battery Level Displays | Internal reference and 10-LED output create intuitive voltage level indicators |
| Audio VU Meters | Linear response and stable LED current provide smooth visualization |
| Power Supply Monitoring | Measures up to 12 V input for real-time voltage tracking |
| Instrumentation Panels | Dot/bar flexibility and adjustable LED brightness improve UI clarity |
| Automotive Displays | –40°C to +85°C performance supports harsh environments |
| Consumer Electronics | Simple interface reduces BOM cost and board complexity |
Performance Comparison
| Specification | LM3914VX/NOPB | LED Driver IC A | General Discrete Driver |
|---|---|---|---|
| Display Type | Linear 10-segment | 8–10 LEDs | Varies |
| LED Current | 2–30 mA adjustable | Fixed | Requires resistors |
| Reference Voltage | 1.28 V internal | External | None |
| Modes | Dot/Bar | Bar only | Dot only |
| Input Voltage | 0–12 V | 0–5 V | Varies |
| Ease of Use | High | Medium | Low |
Conclusion
The LM3914VX/NOPB is a practical and highly flexible analog display driver designed for engineers needing a simple and reliable LED-based visual indicator. Its 1.28 V programmable reference, wide 2–30 mA LED current capability, and dot/bar mode selection make it adaptable across battery indication, audio visualization, panel meters, and industrial monitoring equipment. With a broad supply range and stable performance across temperature, the LM3914VX/NOPB remains a dependable option for both consumer and industrial designs.
Manufacturer Profile
Texas Instruments (TI) is a leading global provider of analog and mixed-signal semiconductors. The LM391x series has been widely adopted across industries for LED level indication applications thanks to TI’s reliability, consistency, and strong analog design heritage. TI continues to deliver robust, field-proven solutions for power management, display control, and instrumentation interfaces.
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