LM3914N-1
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The LM3914N-1 is a monolithic integrated circuit that can drive up to 10 LEDs in a linear bar graph display. It is designed to sense analog voltage levels and convert them into visual LED displays, making it ideal for applications such as audio level indicators, VU meters, and other analog display needs.
Key Features:
- Drives up to 10 LEDs in bar graph mode
- Linear or logarithmic output scaling options
- Wide supply voltage range: 3V to 25V
- Directly drives LEDs with current up to 30mA
- Adjustable reference voltage for setting LED thresholds
- LED current programmable with external resistor
- LED current mode operation improves noise immunity
- Dot mode operation for standalone LED control
- Supply Voltage: 3V to 25V
- LED Current: Up to 30mA per LED segment
- LED Outputs: 10 (linear or logarithmic display modes)
- Reference Voltage Range: Adjustable with external resistor
- Temperature Range: 0°C to +70°C (commercial grade), -40°C to +85°C (industrial grade)
- Package Type: DIP-18
- Audio level indicators (VU meters)
- Battery level monitors
- Signal strength meters
- Analog panel meters
- Voltage level indicators
- Process monitoring
Technical Specifications:
- Logic Family: CMOS
- Number of Channels: 3
- Switch Configuration: Single-Pole Double-Throw (SPDT)
- Supply Voltage Range: 3V to 15V
- “ON” Resistance (R_ON): 125Ω typical at V_DD = 10V
- “OFF” Leakage Current (I_OFF): ±100pA typical at V_DD = 10V
- Control Input Voltage (V_IH): 0.7 V_DD min, 0.3 V_DD max
- Maximum Operating Frequency: 40 MHz at V_DD = 10V
Applications:
- Signal routing and switching
- Analog and digital multiplexing
- Audio and video signal processing
- Data acquisition systems
- Test equipment