LM3915 Logarithmic Dot/Bar Display Driver IC

Features:

• Analog Controlled LED Driver IC with Logarithmic output

• LED incremented by one step for every 3dB

• Monitor upto 30dB using 10 LEDs

• Number of controllable LEDs: 10

• Operating Voltage: 3V to 25V

• Reference Voltage: 1.2V to 12V

• LED sink current: 1mA to 30mA (programmable)

• Both Dot/Bar mode available

• Available in 18-pin DIP, PLCC package

• Provides a Logarithmic 3dB Analog Display from Analog Voltage Input

• Drives LED's, LCD's or Vacuum Flourescents

• Bar or Dot Display Mode

• Expandable to 100 Steps

• 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