ULN2003AN

The ULN2003AN is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It is specifically designed for interfacing between low-level digital or microcontroller signals and higher-power loads such as motors, relays, solenoids, and lamps.

Key Features:

• Darlington Transistor Array: The ULN2003AN consists of seven Darlington pairs, each capable of driving loads up to 500mA (600mA peak) with a maximum collector-emitter voltage of 50V.

• Sink Driver: It is designed as a sink driver, meaning it can handle higher currents when driving loads connected to its outputs to ground.

• Integral Suppression Diodes: Each Darlington pair includes a suppression diode for inductive load protection, ensuring safe operation when driving inductive loads such as relays or motors.

• High-Voltage Outputs: The ULN2003AN can handle higher voltage levels, making it suitable for applications requiring driving loads with higher voltages.

• Integrated Input Resistors: The device features internal input resistors to simplify interfacing with standard logic families such as TTL, CMOS, or PMOS.

• Package Options: Available in various package options, including through-hole DIP (Dual Inline Package) and surface-mount SOIC (Small Outline Integrated Circuit), providing flexibility for different PCB mounting requirements.

• Wide Operating Temperature Range: The ULN2003AN operates over a wide temperature range, making it suitable for use in diverse environmental conditions.

Applications:

• Stepper Motor Drivers: It is commonly used as a driver for unipolar and bipolar stepper motors in various applications such as robotics, CNC machines, printers, and automated systems.

• Relay and Solenoid Drivers: The ULN2003AN is used to drive relays and solenoids in industrial automation, automotive, and home automation systems.

• Lamp and LED Drivers: It can be employed to drive lamps, LEDs, and other lighting loads in automotive, signage, and decorative lighting applications.

• Switching Power Supplies: It can be used to control the switching of power supply circuits, especially in low- to medium-power applications.

• Peripheral Drivers: The ULN2003AN is utilized in various peripheral driver applications such as printer heads, motors, displays, and actuators in consumer electronics and industrial equipment.

• Instrumentation and Control: It finds use in instrumentation and control systems for interfacing between digital control signals and higher-power loads.