Overview
The ULN2003AN, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device is part of the ULN2003 series and is widely recognized for its versatility and reliability in various applications. It consists of seven NPN Darlington pairs, each capable of sinking up to 500 mA of current and withstanding output voltages of up to 50 V. The ULN2003AN is designed to interface directly with TTL or 5V CMOS logic, making it a convenient choice for driving high-voltage or high-current peripherals from microcontrollers or logic devices that cannot handle such conditions on their own.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Output Voltage (Vo) | - | - | 50 | V |
| Continuous Collector Current (Ic) | - | - | 500 | mA |
| Peak Collector Current | - | - | 600 | mA |
| Input Voltage (Vin) | - | - | 30 | V |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.9 | 1.2 | 1.7 | V |
| Input Current (Ii(on)) | 0.93 | - | 1.35 | mA |
| Operating Ambient Temperature Range | -40 | - | 70 | °C |
| Junction Temperature | - | - | 150 | °C |
Key Features
- Seven high-voltage, high-current NPN Darlington transistor pairs with common emitters and open collector outputs.
- Each channel rated at 500 mA continuous collector current and can withstand peak currents of 600 mA.
- Integrated suppression diodes for inductive load driving.
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic families.
- Outputs can be paralleled for higher current capability.
- Series base resistor for each Darlington pair, allowing direct operation with TTL or 5V CMOS devices).
Applications
The ULN2003AN is versatile and can be used in a wide range of applications, including:
- Driving solenoids, relays, and DC motors).
- Controlling lamps, LED displays, and filament lamps).
- Driving thermal print heads and high-power buffers).
- Logic buffers and line drivers).
- Hammer drivers and other high-current, high-voltage applications).
Q & A
- What is the maximum output voltage of the ULN2003AN?
The maximum output voltage of the ULN2003AN is 50 V).
- What is the continuous collector current rating of each channel in the ULN2003AN?
Each channel in the ULN2003AN is rated at 500 mA continuous collector current).
- Can the ULN2003AN be used with TTL and CMOS logic?
- What type of loads can the ULN2003AN drive?
The ULN2003AN can drive high-voltage or high-current loads, including inductive loads such as motors, solenoids, and relays).
- Does the ULN2003AN have built-in suppression diodes?
- What is the operating temperature range of the ULN2003AN?
The operating ambient temperature range of the ULN2003AN is from -40°C to 70°C).
- Can the outputs of the ULN2003AN be paralleled for higher current?
- What is the junction temperature limit of the ULN2003AN?
The junction temperature limit of the ULN2003AN is 150°C).
- What package types are available for the ULN2003AN?
The ULN2003AN is available in 16-pin plastic DIP (PDIP) and small outline package (SO-16) configurations).
- What are some common applications of the ULN2003AN?
