ULN2003ADTR

The ULN2003ADTR is a high-voltage, high-current Darlington transistor array specifically designed for driving inductive loads such as relays, solenoids, and stepper motors. It is a versatile IC that offers seven independent output channels, each capable of delivering up to 500mA of current with a maximum voltage rating of 50V.

Key Features:

1. High-Voltage, High-Current Capability:

   • The ULN2003ADTR can handle up to 50V and provide up to 500mA per output channel, making it suitable for driving a wide range of inductive loads.

2. Darlington Transistor Array:

   • The IC incorporates seven Darlington transistor pairs, which provide high current gain and voltage amplification, making it ideal for driving loads that require high current and voltage levels.

3. Built-in Clamp Diodes:

   • Each output channel features a built-in clamp diode, which protects the IC from inductive spikes generated when the load is switched off. This ensures reliable operation and extends the lifespan of the device.

4. TTL/CMOS Compatible Inputs:

   • The ULN2003ADTR has TTL/CMOS compatible inputs, allowing it to interface easily with digital circuits and microcontrollers. This makes it a versatile component for use in various electronic systems.

5. Low Saturation Voltage:

   • The IC has a low saturation voltage, which reduces power consumption and heat generation during operation. This makes it suitable for use in applications where energy efficiency is a concern.

6. Robust Package:

   • The ULN2003ADTR comes in a robust SOIC-16 package, which provides good mechanical stability and easy mounting on printed circuit boards.

Applications:

• Stepper Motor Drives:

  • The ULN2003ADTR can be used to drive stepper motors, providing the necessary current and voltage to operate the motor’s coils. Its ability to handle multiple output channels makes it suitable for driving multi-phase stepper motors.

• Relay Drivers:

  • The IC can be used to drive relays, particularly those that require high current and voltage levels to switch on and off. Its built-in clamp diodes protect the IC from inductive spikes generated by the relay’s coil.

• Lighting Control:

  • The ULN2003ADTR can be used to control LED lights, lamp strips, and other lighting equipment. Its high current output capability allows it to directly drive these devices, making it a suitable choice for lighting control applications.

• Electromagnetic Valve Control:

  • The IC can be used to control electromagnetic valves, such as pneumatic valves and water flow valves. Its multi-channel design allows it to simultaneously control multiple valves, making it a versatile component for use in automation and control systems.

In summary, the ULN2003ADTR is a high-voltage, high-current Darlington transistor array that offers seven independent output channels for driving inductive loads. Its key features include high current and voltage capability, built-in clamp diodes for protection, TTL/CMOS compatible inputs, low saturation voltage, and a robust package. Its versatility makes it suitable for a wide range of applications, including stepper motor drives, relay drivers, lighting control, and electromagnetic valve control.