The LM3914N-1/NOPB is an Integrated Circuit (IC) component made by Texas Instruments. It is a versatile LED driver IC that is commonly used to display analog voltage levels or create simple bar graph displays. This IC is specifically designed to operate with single-ended, low-level audio or other voltage signals, making it a popular choice in audio spectrum analyzers, VU meters, and other audio-related applications.
Some key features of the LM3914N-1/NOPB include a linear display scale, precise 10-step voltage divider, and output capability to directly drive LEDs or low-power incandescent indicators. It operates on a supply voltage range varying from 3V to 25V, making it suitable for a wide range of applications.
The IC contains an internal voltage reference and oscillator, which eliminates the need for external components to set the frequency or voltage levels. It also offers an adjustable reference and supply voltage pin, enabling the user to set the desired display range. Additionally, the LM3914N-1/NOPB has a built-in low-bias current, ensuring minimal loading of the circuit it is used in.
One notable feature of the LM3914N-1/NOPB is its ability to cascade multiple ICs for creating larger displays or extending the number of display steps
