Product Summary

The LM3915N is a Dot/Bar Display Driver. It 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. The LM3915N 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 LM3915N system can operate from a single supply as low as 3V or as high as 25V.

Parametrics

LM3915N absolute maximum ratings: (1)Voltage on Output Drivers: 25V; (2)Input Signal Overvoltage (Note 4): ±35V; (3)Divider Voltage: -100 mV to V+; (4)Reference Load Current: 10 mA; (5)Storage Temperature Range: -55℃ to +150℃; (6)Lead Temperature(Soldering, 10 sec.): 260℃; (7)Power Dissipation Molded DIP(N): 1365 mW; (8)Supply Voltage: 25V.

Features

LM3915N features: (1)3 dB/step, 30 dB range; (2)Drives LEDs, LCDs, or vacuum fluorescents; (3)Bar or dot display mode externally selectable by user; (4)Expandable to displays of 90 dB; (5)Internal voltage reference from 1.2V to 12V; (6)Operates with single supply of 3V to 25V; (7)Inputs operate down to ground; (8)Output current programmable from 1 mA to 30 mA; (9)Input withstands ±35V without damage or false outputs; (10)Outputs are current regulated, open collectors; (11)Directly drives TTL or CMOS; (12)The internal 10-step divider is floating and can be referenced to a wide range of voltages.

Diagrams

LM3915N block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
LM3915N
LM3915N
Other

Data Sheet
Negotiable 
LM3915N-1/NOPB
LM3915N-1/NOPB
National Semiconductor (TI)
LED Lighting Drivers DOT/BAR DISPLAY DRVR
Data Sheet
0-1: $1.70
1-25: $1.38
25-100: $1.24
100-250: $1.10
LM3915N-1
LM3915N-1
National Semiconductor (TI)
LED Lighting Drivers
Data Sheet
0-340: $1.10
340-500: $0.97
500-1000: $0.74
1000-5000: $0.71