Overview
The ULN2004ADR is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device is part of the ULN200x series, which is designed for driving high-current loads such as relays, lamps, and display drivers. The ULN2004ADR is particularly suited for applications requiring low input current and high output current drive, making it an efficient choice for various industrial and consumer electronics.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOIC (16), PDIP (16), SOP (16), TSSOP (16) |
| Package Size | SOIC: 9.90mm × 3.91mm, PDIP: 19.30mm × 6.35mm, SOP: 10.30mm × 5.30mm, TSSOP: 5.00mm × 4.40mm |
| Number of Channels | 7 |
| Input Voltage Range | Up to 15V for CMOS compatibility |
| Output Current per Channel | Up to 500 mA |
| Maximum Collector-Emitter Voltage (Vce) | 50V |
| Input Current | Typically below 1.35 mA for ULN2004A |
| Operating Temperature Range | -40°C to 105°C |
Key Features
- Darlington connected NPN transistors providing high-current gain (β2) up to 10,000 A/A
- Low input current requirement, suitable for operation with low GPIO voltages
- Integrated base resistors (10.5kΩ for ULN2004A) for direct operation with CMOS devices
- Diodes for suppressing kick-back voltage from inductive loads
- High-voltage and high-current capabilities, making it suitable for driving relays, lamps, and display drivers
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
Q & A
- What is the ULN2004ADR used for? The ULN2004ADR is used for driving high-current loads such as relays, lamps, and display drivers.
- What is the input voltage range for the ULN2004ADR? The input voltage range is up to 15V for CMOS compatibility.
- How many channels does the ULN2004ADR have? The ULN2004ADR has 7 channels.
- What is the maximum output current per channel? The maximum output current per channel is up to 500 mA.
- What is the maximum collector-emitter voltage (Vce) for the ULN2004ADR? The maximum collector-emitter voltage (Vce) is 50V.
- What is the typical input current for the ULN2004ADR? The typical input current is below 1.35 mA.
- What is the operating temperature range for the ULN2004ADR? The operating temperature range is -40°C to 105°C.
- What types of packages are available for the ULN2004ADR? The available packages include SOIC (16), PDIP (16), SOP (16), and TSSOP (16).
- What are the key features of the Darlington connected NPN transistors in the ULN2004ADR? The Darlington connected NPN transistors provide high-current gain (β2) up to 10,000 A/A and low input current requirement.
- How does the ULN2004ADR suppress kick-back voltage? The ULN2004ADR uses diodes to suppress kick-back voltage from inductive loads.
