LM3915

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. The LM3915 is specifically designed to accommodate audio level and power monitoring, instrument monitoring, and other applications requiring a logarithmic response. By monitoring voltage levels, it can indicate power, VU-metering, or any other application requiring an analog display from a few millivolts to several volts.

Key Features:

• Drives LEDs, LCDs, or vacuum fluorescent displays
• Logarithmic 3 dB/step display
• Adjustable reference voltage
• Adjustable LED brightness
• Internal voltage reference from 1.2V to 12V
• Wide supply voltage range: 3V to 25V
• Low power consumption
• Current drive to LEDs: 30 mA without external transistors
• Cascadable for more displays

Technical Specifications:

• Display: 10-segment LED, LCD, or vacuum fluorescent display
• Reference Voltage: Adjustable from 1.2V to 12V
• Supply Voltage Range: 3V to 25V
• LED Drive Current: 30 mA (per LED)
• Operating Temperature Range: 0°C to +70°C
• Package: DIP-18, SO-18

Applications:

• Audio level indicators
• Power meter displays
• Battery level indicators
• Instrument monitoring
• VU-metering
• Industrial process control

Datasheet:
For detailed technical specifications, refer to the LM3915 Datasheet.