Overview
The LM3915N-1, produced by Texas Instruments, is a logarithmic dot/bar display driver integrated circuit. This IC is part of a family of LED bargraph display drivers that include linear (LM3914), logarithmic (LM3915), and VU-characteristic (LM3916) devices. The LM3915N-1 is specifically designed for applications requiring a logarithmic scale display, such as audio level, power, or light intensity indicators. It is known for its high accuracy, typically better than 1 dB, and its suitability for signals with wide dynamic ranges.
Key Specifications
| Parameter | Value |
|---|---|
| Part Number | LM3915N-1/NOPB |
| Manufacturer | Texas Instruments |
| Package Type | 18-DIP (0.300", 7.62mm) |
| Supply Voltage | 3 V ~ 25 V |
| Supply Current | 6.1 mA |
| Operating Temperature | 0°C ~ 70°C |
| Display Type | LED, LCD, Vacuum Fluorescent (VF) |
| Configuration | Dot/Bar Display |
| Digits or Characters | 10 Steps |
| Mounting Type | Through Hole |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
Key Features
- Logarithmic scale display suitable for wide dynamic range signals.
- High accuracy, typically better than 1 dB.
- Supports LED, LCD, and Vacuum Fluorescent (VF) displays.
- Dot/bar display configuration with 10 steps.
- Wide supply voltage range from 3 V to 25 V.
- Low supply current of 6.1 mA.
- Operating temperature range from 0°C to 70°C.
- Through-hole mounting in an 18-DIP package.
- Lead-free and RoHS compliant.
Applications
The LM3915N-1 is commonly used in various applications that require a logarithmic scale display, such as:
- Audio level indicators.
- Power level indicators.
- Light intensity indicators.
- Voltage monitoring systems.
- Industrial control panels.
- Aerospace and automotive instrumentation.
Q & A
- What is the primary function of the LM3915N-1 IC?
The LM3915N-1 is a logarithmic dot/bar display driver IC, designed to drive LED, LCD, or Vacuum Fluorescent displays in a logarithmic scale. - What is the typical accuracy of the LM3915N-1?
The accuracy is typically better than 1 dB. - What is the supply voltage range for the LM3915N-1?
The supply voltage range is from 3 V to 25 V. - What is the operating temperature range for the LM3915N-1?
The operating temperature range is from 0°C to 70°C. - What type of package does the LM3915N-1 come in?
The LM3915N-1 comes in an 18-DIP (0.300", 7.62mm) package. - Is the LM3915N-1 RoHS compliant?
Yes, the LM3915N-1 is lead-free and RoHS compliant. - What are some common applications for the LM3915N-1?
Common applications include audio level indicators, power level indicators, light intensity indicators, voltage monitoring systems, industrial control panels, and aerospace and automotive instrumentation. - How many steps does the dot/bar display of the LM3915N-1 have?
The dot/bar display has 10 steps. - What is the supply current of the LM3915N-1?
The supply current is 6.1 mA. - Is the LM3915N-1 still in production?
Although it has been discontinued in some contexts, it is still available from various suppliers and is considered to be in production for certain applications.
