LM3915N-1

Display Drivers Overview

The LM3915N-1 is a monolithic integrated circuit designed to sense analog voltage levels and drive displays for logarithmic indication. It features ten independent comparators referenced by an internal precision divider, enabling the control of ten LEDs, LCDs, or vacuum fluorescent displays with 3 dB per step resolution. The device includes a programmable current source for LED drive regulation without external limiting resistors. It operates on a single power supply ranging from 3 V to 25 V and incorporates a high-impedance input buffer capable of accepting signals down to ground potential.

Display Drivers Feature Summary

• Provides logarithmic display capability with 3 dB per step resolution for wide dynamic range signal indication
• Integrates a programmable regulated current source for direct LED driving without external current-limiting components
• Features a high-impedance input buffer that accepts signals extending to ground potential

Display Drivers Applications

• Audio level meters and peak/average level indicators
• Power measurement instruments
• RF signal strength indicators
• Vibration monitoring displays

Display Drivers Procurement Notes

Verify the specific suffix designation against the manufacturer's latest documentation to confirm pinout compatibility and electrical characteristics. Ensure the selected variant matches the required package type and operating temperature range for the intended application environment before finalizing procurement.

Display Drivers Selection Notes

Select this component when a logarithmic response is required for visual signal representation rather than linear scaling. Consider the internal current source capability to simplify design by eliminating external resistor networks for display elements. Evaluate the single-supply operation range to ensure compatibility with the system's available voltage rails.

Display Drivers Part Context

This part belongs to the LM391x family of dot/bar display drivers manufactured by Texas Instruments. It is specifically configured for logarithmic scale applications, distinguishing it from the linear-scale LM3914. The N-1 suffix typically denotes a specific manufacturing revision or package configuration within the legacy product line.

Display Drivers Replacement Considerations

LM3915

Display Drivers FAQ

Does the LM3915N-1 require external resistors to limit current to the display elements?

No, the device includes a regulated and programmable current source that drives the display elements, eliminating the need for external current-limiting resistors.

What is the minimum input signal level the LM3915N-1 can accept?

The high-impedance input buffer allows the device to accept signals down to ground potential.