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LM3915N-1 Integrated Circuit Chip Dot/Bar Display Driver

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LM3915N-1 Integrated Circuit Chip Dot/Bar Display Driver

Brand Name NSC
Model Number LM3915N-1
Certification Original Factory Pack
Place of Origin Original
Minimum Order Quantity 20pcs
Price Negotiation
Payment Terms T/T, Western Union,PayPal
Supply Ability 5200PCS
Delivery Time 1 Day
Packaging Details please contact me for details
Description LED, LCD, Vacuum Fluorescent (VF) Driver 18-DIP
Power Dissipation 1365 mW
PD 500 mW
Voltage on Output Drivers 25V
Input Signal Overvoltage (Note 4) ±35V
Divider Voltage −100 mV to V+
Detailed Product Description

LM3915 Dot/Bar Display Driver


Features

♦ 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

 

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. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1 dB. 

 

The LM3915’s 3 dB/step display is suited for signals with wide dynamic range, such as audio level, power, light intensity or vibration. Audio applications include average or peak level indicators, power meters and RF signal streCM GROUPh meters. Replacing conventional meters with an LED bar graph results in a faster responding, more rugged display with high visibility that retains the ease of interpretation of an analog display.

 

Typical Applications

 

 

 

 

 

Product Tags: chip in electronics   small scale integrated circuits  
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