Part # LM3916 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM3916 Dot Bar Display Driver


Part Details:

LM3916 January 2000 Dot/Bar LM3916Dot/Bar Display DriverGeneral Description The LM3916 is very versatile. The outputs can drive LCDs, Display vacuum fluorescents and incandescent bulbs as well as The LM3916 is a monolithic integrated circuit that senses LEDs of any color. Multiple devices can be cascaded for a analog voltage levels and drives ten LEDs, LCDs or vacuum dot or bar mode display for increased range and/or resolu- fluorescent displays, providing an electronic version of the tion. Useful in other applications are the linear LM3914 and popular VU meter. One pin changes the display from a bar the logarithmic LM3915. graph to a moving dot display. LED current drive is regulated Driver and programmable, eliminating the need for current limiting Features resistors. The whole display system can operate from asingle supply as low as 3V or as high as 25V. n Fast responding electronic VU meter The IC contains an adjustable voltage reference and an n Drivers LEDs, LCDs, or vacuum fluorescents accurate ten-step voltage divider. The high-impedance input n Bar or dot display mode externally selectable by user buffer accepts signals down to ground and up to within 1.5V n Expandable to displays of 70 dB of the positive supply. Further, it needs no protection against n Internal voltage reference from 1.2V to 12V inputs of ±35V. The input buffer drives 10 individual com- n Operates with single supply of 3V to 25V parators referenced to the precision divider. Accuracy is n Inputs operate down to ground typically better than 0.2 dB. n Output current programmable from 1 mA to 30 mA Audio applications include average or peak level indicators, n Input withstands ±35V without damage or false outputs and power meters. Replacing conventional meters with an n Outputs are current regulated, open collectors LED bar graph results in a faster responding, more rugged n Directly drives TTL or CMOS display with high visibility that retains the ease of interpreta-tion of an analog display. n The internal 10-step divider is floating and can be referenced to a wide range of voltages The LM3916 is extremely easy to apply. A 1.2V full-scalemeter requires only one resistor in addition to the ten LEDs. The LM3916 is rated for operation from 0°C to +70°C. The One more resistor programs the full-scale anywhere from LM3916N-1 is available in an 18-lead molded DIP package. 1.2V to 12V independent of supply voltage. LED brightnessis easily controlled with a single pot. © 2004 National Semiconductor Corporation DS007971 www.national.com Typical Applications LM3916


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LM3916.pdf Datasheet