Texas Instruments LM3914
The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. This feature is one that allows operation of the whole system from less than 3V. The circuit contains its own adjustable reference and accurate 10-step voltage divider.| Part No. | LM3914 |
|---|---|
| Datasheet | LM3914 Download |
| Manufacturer |  Texas Instruments |
| Description | Dot/Bar Display Driver |
| Buy | Stock & Price |
FEATURES
1●2 Drives LEDs, LCDs or Vacuum Fluorescents
● Bar or Dot Display Mode Externally Selectable by User
● Expandable to Displays of 100 Steps
● Internal Voltage Reference from 1.2V to 12V
● Operates with Single Supply of Less than 3V
● Inputs Operate Down to Ground
● Output Current Programmable from 2 mA to 30 mA
● No Multiplex Switching or Interaction Between Outputs
● Input Withstands ±35V without Damage or False Outputs
● LED Driver Outputs are Current Regulated, Open-collectors
● Outputs can Interface with TTL or CMOS Logic
● The Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages
DESCRIPTION
A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. The low-bias-current input buffer accepts signals down to ground, or V−, yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider.
