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LM3915 - Dot/Bar Display Driver

General Description

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display.

One pin changes the display from a bar graph to a moving dot display.

Key Features

  • 1.
  • 2 3 dB/step, 30 dB Range.
  • Drives LEDs, LCDs, or Vacuum Fluorescents.
  • Bar or Dot Display Mode Externally Selectable by User.
  • Expandable to Displays of 90 dB.
  • Internal Voltage Reference from 1.2V to 12V.
  • Operates with Single Supply of 3V to 25V.
  • Inputs Operate Down to Ground.
  • Output Current Programmable from 1 mA to 30 mA.
  • Input Withstands ±35V without Damage or False Outputs.
  • Outputs are Current Regulated,.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM3915 www.ti.com SNVS740C – JANUARY 2000 – REVISED MARCH 2013 LM3915 Dot/Bar Display Driver Check for Samples: LM3915 FEATURES 1 •2 3 dB/step, 30 dB Range • Drives LEDs, LCDs, or Vacuum Fluorescents • Bar or Dot Display Mode Externally Selectable by User • Expandable to Displays of 90 dB • Internal Voltage Reference from 1.2V to 12V • Operates with Single Supply of 3V to 25V • Inputs Operate Down to Ground • Output Current Programmable from 1 mA to 30 mA • Input Withstands ±35V without Damage or False Outputs • Outputs are Current Regulated, Open Collectors • Directly Drives TTL or CMOS • The Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages The LM3915 is Rated for Operation from 0°C to +70°C. The LM3915N-1 is Available in an 18lead PDIP Package.