Overview
The ULN2003AD is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It consists of seven NPN Darlington pairs, each featuring high-voltage outputs with common-cathode clamp diodes for switching inductive loads. This device is designed to interface with various types of logic, including TTL, CMOS, and PMOS, making it versatile for a wide range of applications. The ULN2003AD is particularly useful for driving loads that require high current and voltage, such as relays, solenoids, lamps, and motors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Emitter Voltage (VCE) | 0 to 50 | V |
| Continuous Collector Current (IC) | 500 mA | mA |
| Peak Collector Current (IC) | 600 mA | mA |
| Input Voltage (VI) | 0 to 30 | V |
| Operating Ambient Temperature Range (TA) | -40 to 85 | °C |
| Junction Temperature (TJ) | -40 to 150 | °C |
| Package Type | 16-SOIC | |
| Number of Pins | 16 |
Key Features
- 500 mA-rated collector current per single output
- High-voltage outputs: 50 V
- Output clamp diodes for inductive load suppression
- Inputs compatible with TTL, CMOS, and PMOS logic
- Relay-driver applications
- Series base resistor for each Darlington pair, allowing direct operation with 5 V TTL or CMOS devices
- Outputs can be paralleled for higher current capability
Applications
- Relay drivers
- Stepper and DC brushed motor drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Solenoids, tiny motors, and LEDs
Q & A
- What is the ULN2003AD device?
The ULN2003AD is a high-voltage, high-current Darlington transistor array consisting of seven NPN Darlington pairs.
- What is the collector-current rating of a single Darlington pair in the ULN2003AD?
The collector-current rating of a single Darlington pair is 500 mA, with a peak current of 600 mA.
- What is the maximum output voltage of the ULN2003AD?
The maximum output voltage is 50 V.
- What types of logic are the inputs of the ULN2003AD compatible with?
The inputs are compatible with TTL, CMOS, and PMOS logic.
- Can the outputs of the ULN2003AD be paralleled for higher current capability?
- What is the operating ambient temperature range of the ULN2003AD?
The operating ambient temperature range is -40 to 85°C.
- What is the package type of the ULN2003AD?
The package type is 16-SOIC.
- How many pins does the ULN2003AD have?
The ULN2003AD has 16 pins.
- What are some common applications of the ULN2003AD?
Common applications include relay drivers, motor drivers, lamp drivers, display drivers, and logic buffers.
- Does the ULN2003AD include suppression diodes for inductive loads?
