Overview
The ULN2003ADR is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device consists of seven NPN Darlington pairs, each featuring high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The ULN2003ADR is designed to operate directly with TTL or 5V CMOS devices, making it versatile for a wide range of applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (VO) | 50 | 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 70 | °C |
| Storage Temperature Range (TSTG) | -55 to 150 | °C |
| Junction Temperature (TJ) | 150 | °C |
| Package Type | SOIC (D) - 16 pins |
Key Features
- Seven NPN Darlington pairs per package
- 500mA-rated collector current per driver (600mA peak)
- High-voltage outputs: 50V
- Integrated suppression diodes for inductive loads
- Outputs can be paralleled for higher current capability
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic
- 2.7kΩ series base resistor for each Darlington pair for operation directly with TTL or 5V CMOS devices
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Solenoids, DC motors, thermal printheads, and high-power buffers
Q & A
- What is the maximum output voltage of the ULN2003ADR?
The maximum output voltage is 50V.
- What is the continuous collector current rating of the ULN2003ADR?
The continuous collector current rating is 500mA per driver.
- Can the outputs of the ULN2003ADR be paralleled for higher current capability?
- What types of logic are the inputs of the ULN2003ADR compatible with?
The inputs are compatible with TTL, CMOS, PMOS, and DTL logic.
- What is the purpose of the integrated suppression diodes in the ULN2003ADR?
The integrated suppression diodes are for switching inductive loads.
- What is the operating ambient temperature range of the ULN2003ADR?
The operating ambient temperature range is -40 to 70°C.
- What package types are available for the ULN2003ADR?
The device is available in SOIC (D) - 16 pins and other packages like DIP-16 and TSSOP16.
- How do the Darlington pairs in the ULN2003ADR enhance its current drive capability?
The Darlington pairs create a high-current gain, allowing high-output current drive with a very low input current.
- What are some common applications of the ULN2003ADR?
Common applications include relay drivers, hammer drivers, lamp drivers, display drivers, line drivers, and logic buffers.
- What is the junction temperature limit of the ULN2003ADR?
The junction temperature limit is 150°C.
