Overview
The ULN2003ADE4, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is part of the ULN2003 series and is widely recognized for its versatility and reliability across various applications. It consists of seven NPN Darlington transistor pairs, each capable of sinking up to 500 mA and withstanding peak currents of 600 mA. The ULN2003ADE4 is designed to interface directly with TTL and 5-V CMOS logic families, making it a valuable component in many electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (VO) | 50 | V |
| Input Voltage (VI) | 30 | V |
| Continuous Collector Current (IC) | 500 | mA |
| Peak Collector Current | 600 | mA |
| Continuous Base Current (IB) | 25 | mA |
| Clamping Diode Continuous Current (IF) | 350 | mA |
| Clamping Diode Reverse Voltage (VR) | 50 | V |
| Operating Ambient Temperature Range (TA) | -40 to 85 | °C |
| Storage Temperature Range (TSTG) | -55 to 150 | °C |
| Junction Temperature (TJ) | 150 | °C |
Key Features
- Seven high-voltage, high-current NPN Darlington transistor pairs with common emitters and open collector outputs.
- Integrated suppression diodes for inductive load driving to prevent kick-back voltage.
- Compatible with TTL and 5-V CMOS logic families due to the 2.7-kΩ series base resistor for each Darlington pair.
- High-current gain (β2) allowing for high-output current drive with very low input current.
- Outputs can be paralleled for higher current requirements.
- Available in various packages including DIP, SOIC, and TSSOP.
- Copper leadframe in DIP packages to reduce thermal resistance.
Applications
- Driving solenoids, relays, and DC motors.
- Controlling LED displays and filament lamps.
- Operating thermal print heads and high-power buffers.
- Interface solutions for a wide range of loads in industrial, automotive, and consumer electronics.
Q & A
- What is the ULN2003ADE4 used for?
The ULN2003ADE4 is used as a high-voltage, high-current Darlington transistor array for driving various loads such as solenoids, relays, DC motors, LED displays, and more.
- What is the maximum output voltage of the ULN2003ADE4?
The maximum output voltage is 50 V.
- What is the maximum continuous collector current of the ULN2003ADE4?
The maximum continuous collector current is 500 mA, with a peak current of 600 mA.
- Is the ULN2003ADE4 compatible with CMOS logic?
- What packages are available for the ULN2003ADE4?
The device is available in DIP, SOIC, and TSSOP packages.
- Why are suppression diodes included in the ULN2003ADE4?
The suppression diodes are included to prevent kick-back voltage from inductive loads when the NPN drivers are turned off.
- What is the operating ambient temperature range of the ULN2003ADE4?
The operating ambient temperature range is -40 to 85 °C.
- Can the outputs of the ULN2003ADE4 be paralleled?
- What is the junction temperature limit of the ULN2003ADE4?
The junction temperature limit is 150 °C.
- Why does the ULN2003ADE4 have a copper leadframe in DIP packages?
The copper leadframe reduces thermal resistance, improving heat dissipation.
