ULN2803ADTR

The ULN2803ADTR is a high-voltage, high-current Darlington transistor array that offers a versatile solution for driving a wide range of loads. Here’s a detailed description of its features and capabilities:

Key Features

• High-Voltage, High-Current Capability:

  • The ULN2803ADTR can handle up to 50V (collector-emitter voltage) and 500mA (continuous collector current) per channel, making it suitable for driving high-power loads such as relays, solenoids, and stepper motors.

• Eight Independent Darlington Drivers:

  • The device features eight independent Darlington transistor pairs, each providing high-current gain and saturation voltage characteristics.

• Integral Clamp Diodes:

  • The integral clamp diodes in the ULN2803ADTR provide protection against transient voltages, ensuring reliable operation and extending the lifespan of the device.

• TTL/CMOS Compatible Inputs:

  • The inputs of the ULN2803ADTR are compatible with TTL and CMOS logic levels, allowing it to interface seamlessly with a wide range of digital circuitry.

• Compact Package:

  • The ULN2803ADTR is available in a compact SOIC (Small Outline Integrated Circuit) package, making it easy to integrate into electronic systems with limited space.

Applications

• Relay Drivers: The high-current capability of the ULN2803ADTR makes it ideal for driving relays in industrial automation and control systems.
• Stepper Motor Drivers: The device can be used to drive stepper motors in precision positioning and control applications.
• LED Displays: The ULN2803ADTR can be used to drive multiplexed LED displays, providing a bright and reliable display solution.
• Logic Buffers: The high-current gain of the Darlington transistor pairs allows the ULN2803ADTR to be used as a logic buffer, amplifying weak logic signals to drive larger loads.

General Specifications

• Operating Temperature Range: Typically -40°C to +85°C, depending on the specific version and manufacturer.
• Package Type: SOIC (Small Outline Integrated Circuit).
• Pin Count: 18 pins.
• Supplier: Manufacturers such as Texas Instruments (TI) offer the ULN2803ADTR in various package options and specifications.

In summary, the ULN2803ADTR is a high-performance Darlington transistor array that offers a versatile solution for driving high-power loads in a wide range of applications. Its high-voltage, high-current capability, TTL/CMOS compatible inputs, and compact package make it an ideal choice for industrial automation, control systems, precision positioning, and other demanding applications.