Overview
The ULN2003AIDR is a high-voltage, high-current Darlington transistor array IC produced by Texas Instruments. This device is designed to interface between low-level logic and high-power loads, making it ideal for a variety of applications in electronics and automation systems. The ULN2003AIDR features seven NPN Darlington pairs with common emitters, each capable of handling high-voltage outputs and high-current loads. It includes built-in clamp diodes to protect against back EMF from inductive loads, ensuring reliable operation in diverse environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Drivers per package | 7 | |
| Switching voltage (max) | 50 | V |
| Output voltage (max) | 50 | V |
| Peak output current | 0.5 | A |
| Delay time (typ) | 250 | ns |
| Input compatibility | CMOS, TTL | |
| Vol at lowest spec current (typ) | 900 | mV |
| Iout/ch (max) | 500 | mA |
| Iout_off (typ) | 50 | µA |
| Operating temperature range | -40 to 105 | °C |
| Package | SOIC-16 |
Key Features
- High-voltage outputs: up to 50V
- High-current capability: 500mA per Darlington pair
- Inputs compatible with TTL or 5V CMOS devices
- Built-in clamp diodes for protecting against back EMF from inductive loads
- Seven NPN Darlington pairs with common emitters
- Operation directly with TTL or 5V CMOS devices due to 2.7kΩ series base resistor for each Darlington pair
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Automotive load dump compatibility and inductive load compatibility
Q & A
- Q: What is the maximum output voltage of the ULN2003AIDR?
A: The maximum output voltage is 50V.
- Q: Can I directly drive a motor using the ULN2003AIDR?
A: Yes, the ULN2003AIDR is designed to handle high-current loads such as motors. Ensure proper heat sinking for continuous operation.
- Q: How does the ULN2003AIDR protect against back EMF?
A: The built-in diodes in the ULN2003AIDR provide a path for the back EMF generated by inductive loads, protecting the IC and the driving circuit.
- Q: What is the input compatibility of the ULN2003AIDR?
A: The inputs are compatible with CMOS and TTL devices.
- Q: What is the operating temperature range of the ULN2003AIDR?
A: The operating temperature range is -40°C to 105°C.
- Q: How many Darlington pairs does the ULN2003AIDR contain?
A: The ULN2003AIDR contains seven NPN Darlington pairs.
- Q: What is the peak output current of a single Darlington pair in the ULN2003AIDR?
A: The peak output current is 500mA per Darlington pair.
- Q: Can the Darlington pairs in the ULN2003AIDR be paralleled for higher current capability?
A: Yes, the Darlington pairs can be paralleled to achieve higher current capability.
- Q: What type of package does the ULN2003AIDR come in?
A: The ULN2003AIDR comes in a SOIC-16 package.
- Q: What are some common applications of the ULN2003AIDR?
A: Common applications include relay drivers, hammer drivers, lamp drivers, display drivers, line drivers, and logic buffers.
