Overview
The ULN2803ADWR, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is part of the Darlington transistor family, invented by Sidney Darlington, which features bipolar transistor pairs to amplify current efficiently. The ULN2803ADWR is packaged in an 18-pin SOIC (Small Outline Integrated Circuit) package and is ROHS compliant. It is designed to handle high-current loads and is suitable for a variety of applications including industrial automation, automotive systems, and audio amplifier circuits.
Key Specifications
| Specification | Value |
|---|---|
| Part Number | ULN2803ADWR |
| Manufacturer | Texas Instruments |
| Package Type | SOIC-18 (300 mils) |
| Number of Channels | 8 |
| Transistor Type | NPN Darlington Pairs |
| Collector-Base Voltage (VCE) | 50V |
| Collector Current per Channel | 500 mA |
| Input Compatibility | TTL, CMOS, PMOS |
| Operating Temperature Range | -20°C to 85°C |
Key Features
- Darlington Configuration: Provides high current gain and low saturation voltages, enabling efficient switching of high loads.
- High Current Handling: Each Darlington pair can handle up to 500 mA of continuous output current, making it suitable for high-current applications.
- High Voltage Capability: Can withstand maximum collector-base voltages of 50V, suitable for various industrial and automotive systems.
- Clamping Diodes: Includes common-cathode clamp diodes and individual clamping diodes to protect against voltage spikes from inductive loads.
- Input Compatibility: Compatible with TTL, CMOS, and PMOS logic families, allowing connection to microcontrollers, logic gates, and other digital signal sources.
Applications
- Industrial Automation: Controls electromechanical devices such as valves, actuators, pumps, and more in harsh industrial settings.
- Automotive Applications: Used in drive window control systems, door lock actuators, wiper controls, and lighting systems due to its robust design and high voltage handling.
- Audio Amplifier Output Stages: Used to amplify and control output signals in audio amplifier circuits, leveraging its high current handling and protection features.
- Solenoids, Relays, Lamps, and Motors: Efficiently drives these components with its high current and voltage capabilities, and includes clamping diodes for inductive load protection.
- Display Drivers: Suitable for driving LED and gas discharge displays).
Q & A
- What is the ULN2803ADWR?
The ULN2803ADWR is a high-voltage, high-current Darlington transistor array produced by Texas Instruments.
- What package type does the ULN2803ADWR come in?
The ULN2803ADWR is packaged in an 18-pin SOIC (Small Outline Integrated Circuit) package..
- How many channels does the ULN2803ADWR have?
The ULN2803ADWR has 8 channels, each consisting of an NPN Darlington pair..
- What is the maximum collector-base voltage (VCE) of the ULN2803ADWR?
The maximum collector-base voltage (VCE) of the ULN2803ADWR is 50V..
- What is the maximum collector current per channel for the ULN2803ADWR?
Each channel of the ULN2803ADWR can handle up to 500 mA of continuous output current..
- Is the ULN2803ADWR compatible with different logic families?
Yes, the ULN2803ADWR is compatible with TTL, CMOS, and PMOS logic families..
- What types of applications is the ULN2803ADWR suitable for?
The ULN2803ADWR is suitable for industrial automation, automotive systems, audio amplifier circuits, and driving solenoids, relays, lamps, and motors..
- Does the ULN2803ADWR include protection features for inductive loads?
Yes, the ULN2803ADWR includes common-cathode clamp diodes and individual clamping diodes to protect against voltage spikes from inductive loads..
- Can the outputs of the ULN2803ADWR be paralleled for higher current capability?
Yes, the outputs of the ULN2803ADWR can be paralleled to achieve higher current capability if the application requires sink currents beyond the capability of a single output..
- What is the operating temperature range of the ULN2803ADWR?
The operating temperature range of the ULN2803ADWR is -20°C to 85°C..
