LM3915 Datasheet PDF - National Semiconductor Dot/Bar Display Driver Specs

LM3915 - Dot/Bar Display Driver

This page provides the datasheet information for the LM3915, a member of the LM3 Dot/Bar Display Driver family.

Datasheet Summary

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.

Features

n n n n n n n n n n n n 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 f.

Datasheet Details

Part number	LM3915
Manufacturer	National Semiconductor
File Size	602.42 KB
Description	Dot/Bar Display Driver
Datasheet	LM3915 Datasheet
Additional preview pages of the LM3915 datasheet.

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Full PDF Text Transcription

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LM3915 Dot/Bar Display Driver January 2000 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. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ± 35V.

Published: Mar 22, 2005 |