LM3914V

Display Drivers Overview

The LM3914V is a monolithic integrated circuit designed as a dot/bar display driver. It contains an input buffer, ten precision voltage comparators, a reference voltage source, and a resistor divider network. The device converts analog input signals into digital outputs to drive ten LEDs in either a linear or logarithmic scale configuration. It supports supply voltages ranging from 3V to 25V and provides adjustable output current limits for LED brightness control.

Display Drivers Feature Summary

• Integrates ten precision voltage comparators with a built-in reference voltage source for accurate signal comparison.
• Features an internal resistor ladder network that eliminates the need for external precision resistors.
• Includes an input buffer stage to provide high input impedance and improve measurement accuracy.
• Offers selectable dot mode or bar mode operation via a single mode pin.

Display Drivers Applications

• Audio level meters for linear or logarithmic signal visualization
• Voltage monitoring displays
• Battery charge status indicators
• Sensor signal magnitude visualization

Display Drivers Procurement Notes

Verify the specific suffix (e.g., V, N) against the required package type and temperature range. Confirm RoHS compliance status as older variants may be non-compliant. Check for end-of-life notifications or discontinuance notices from Texas Instruments prior to finalizing procurement plans.

Display Drivers Selection Notes

Select this component when a simple, low-pin-count solution is needed for driving multiple LEDs based on an analog voltage level. Ensure the input signal amplitude matches the internal reference voltage range or requires scaling. Consider the power dissipation capabilities if driving multiple LEDs at maximum current simultaneously.

Display Drivers Part Context

The LM3914 belongs to a family of display drivers that includes the LM3915 (logarithmic scale) and LM3916 (audio-specific logarithmic scale). These devices are widely used in consumer electronics and industrial instrumentation for visual feedback. The 'V' suffix typically denotes a plastic SOIC package variant manufactured by Texas Instruments.

Display Drivers Replacement Considerations

• LM3914N-1
• LM3914DR