Overview
The ULN2004ADG4 is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device consists of seven NPN Darlington pairs, each with a common emitter configuration, making it highly versatile for various applications. The ULN2004ADG4 is packaged in a 16-pin SOIC (Small Outline Integrated Circuit) package, which is compact and suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (D) | - |
| Pins | 16 | - |
| Operating Temperature Range | -20 to 70 | °C |
| Output Voltage | 50 | V |
| Continuous Collector Current | 500 | mA |
| Peak Collector Current | 600 | mA |
| Input Voltage | Up to 15 | V |
| Clamping Diode Continuous Current | 350 | mA |
| Junction Temperature | 150 | °C |
| Electrostatic Discharge Rating - HBM | 2 | kV |
Key Features
- Seven Darlington pairs per package with high-voltage outputs (up to 50V) and common-cathode clamp diodes for inductive load switching.
- Each channel is rated at 500 mA with a peak current capability of 600 mA.
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic families.
- 10.5kΩ series base resistor for each Darlington pair, allowing operation directly from CMOS devices with supply voltages of 6V to 15V.
- Output clamp diodes for protecting against inductive load back-EMF.
- Outputs can be paralleled for higher current capability.
- Input pins placed opposite to output pins to simplify board layout.
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 ULN2004ADG4 used for? The ULN2004ADG4 is used for driving high-current and high-voltage loads such as relays, solenoids, lamps, and display drivers.
- What is the maximum output voltage of the ULN2004ADG4? The maximum output voltage is 50V.
- How many Darlington pairs are in the ULN2004ADG4? There are seven Darlington pairs in the ULN2004ADG4.
- What is the continuous collector current rating of each Darlington pair? Each Darlington pair is rated at 500 mA with a peak current of 600 mA.
- What type of logic inputs is the ULN2004ADG4 compatible with? The ULN2004ADG4 is compatible with TTL, CMOS, PMOS, and DTL logic inputs.
- What is the purpose of the clamp diodes in the ULN2004ADG4? The clamp diodes are used to protect against back-EMF from inductive loads.
- Can the outputs of the ULN2004ADG4 be paralleled? Yes, the outputs can be paralleled to achieve higher current capability.
- What is the operating temperature range of the ULN2004ADG4? The operating temperature range is -20°C to 70°C.
- What is the package type of the ULN2004ADG4? The ULN2004ADG4 is packaged in a 16-pin SOIC (Small Outline Integrated Circuit).
- Is the ULN2004ADG4 RoHS compliant? Yes, the ULN2004ADG4 is RoHS compliant.
