Overview
The LM3914V/NOPB is a monolithic integrated circuit produced by Texas Instruments, designed to drive LEDs, LCDs, or vacuum fluorescents to display analog signal levels. This product falls under the category of LED Driver ICs, specifically tailored for applications requiring a visual representation of analog values. The LM3914V/NOPB is particularly popular in audio equipment, instrumentation, and automotive applications due to its versatility and ease of use. Its unique selling points include its ability to drive up to 10 LEDs in a bar or dot display mode, its wide supply voltage range, and its low standby current, making it a competitive choice for designers seeking efficient and compact display solutions.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3 to 25 | V | |
| LED Current | 10 to 30 | mA | Adjustable |
| Display Modes | Bar/Dot | - | Switchable |
| Reference Voltage | 1.25 | V | Internal |
| Operating Temperature | 0 to +70 | °C | |
| Package | PDIP-18 | - | Plastic Dual In-line Package |
| Standby Current | 6 | mA | Typical |
| Output Type | Open Collector | - |
Key Features
- Bar and Dot Display Modes: Switchable between bar and dot display modes for flexible visual representation.
- Wide Supply Voltage Range: Operates from 3V to 25V, making it suitable for various applications.
- Adjustable LED Current: Allows precise control over LED brightness, enhancing energy efficiency.
- Low Standby Current: Ensures minimal power consumption when not actively driving LEDs.
- Internal Voltage Reference: Provides a stable 1.25V reference for accurate signal level measurement.
Applications
The LM3914V/NOPB is widely used in applications requiring visual signal level indication. In audio equipment, it is used for VU meters and level indicators. In instrumentation, it provides a simple and effective way to display analog signal levels. In automotive electronics, it is used for dashboard displays and battery level indicators. Its versatility and ease of integration make it a popular choice for designers across various industries.
Q & A
1. What is the maximum supply voltage for the LM3914V/NOPB?
The maximum supply voltage is 25V.
2. Can the LM3914V/NOPB drive LCDs?
Yes, it can drive LCDs, vacuum fluorescents, or LEDs.
3. How many LEDs can the LM3914V/NOPB drive?
It can drive up to 10 LEDs.
4. What is the reference voltage of the LM3914V/NOPB?
The internal reference voltage is 1.25V.
5. Is the LED current adjustable?
Yes, the LED current is adjustable from 10mA to 30mA.
6. What are the display modes supported by the LM3914V/NOPB?
It supports bar and dot display modes.
7. What is the standby current of the LM3914V/NOPB?
The standby current is typically 6mA.
8. What is the operating temperature range?
The operating temperature range is 0°C to +70°C.
9. What package does the LM3914V/NOPB come in?
It comes in a PDIP-18 package.
10. Can the LM3914V/NOPB be used in automotive applications?
Yes, it is suitable for automotive applications such as dashboard displays.
