Overview
The ULN2803ADW is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device is part of the ULN2803A series and is designed for applications requiring multiple high-current drivers. The ULN2803ADW features eight NPN Darlington pairs, each capable of handling up to 500 mA of collector current and 50 V of collector-emitter voltage. It is packaged in an 18-pin SOIC (Small Outline Integrated Circuit) package, making it suitable for surface mount applications. The device includes common-cathode clamp diodes for switching inductive loads, and its inputs are compatible with various types of logic, including TTL and 5-V CMOS devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Emitter Breakdown Voltage | 50 | V |
| Collector Emitter Saturation Voltage | 1.1 | V |
| Collector Emitter Voltage (VCEO) | 50 | V |
| Max Collector Current | 500 | mA |
| Min Operating Temperature | -65 | °C |
| Max Operating Temperature | 85 | °C |
| Number of Channels | 8 | |
| Number of Pins | 18 | |
| Polarity | NPN | |
| Package Type | SOIC | |
| RoHS Compliant | Yes |
Key Features
- High-voltage, high-current Darlington transistor array with eight NPN Darlington pairs.
- Each Darlington pair can handle up to 500 mA of collector current and 50 V of collector-emitter voltage.
- Common-cathode clamp diodes for switching inductive loads.
- Inputs compatible with TTL and 5-V CMOS devices.
- 2.7 kΩ series base resistor for each Darlington pair.
- Surface mount SOIC package.
- RoHS compliant and lead-free.
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
Q & A
- What is the ULN2803ADW used for?
The ULN2803ADW is used in applications requiring multiple high-current drivers, such as relay drivers, hammer drivers, lamp drivers, display drivers, line drivers, and logic buffers.
- What is the collector-emitter voltage rating of the ULN2803ADW?
The collector-emitter voltage rating of the ULN2803ADW is 50 V.
- How many Darlington pairs does the ULN2803ADW contain?
The ULN2803ADW contains eight NPN Darlington pairs.
- What is the maximum collector current per Darlington pair?
The maximum collector current per Darlington pair is 500 mA.
- Is the ULN2803ADW RoHS compliant?
Yes, the ULN2803ADW is RoHS compliant and lead-free.
- What type of package does the ULN2803ADW come in?
The ULN2803ADW comes in an 18-pin SOIC (Small Outline Integrated Circuit) package.
- What is the operating temperature range of the ULN2803ADW?
The operating temperature range of the ULN2803ADW is from -65°C to 85°C.
- Are the inputs of the ULN2803ADW compatible with TTL and CMOS logic?
Yes, the inputs of the ULN2803ADW are compatible with TTL and 5-V CMOS devices.
- What is the purpose of the common-cathode clamp diodes in the ULN2803ADW?
The common-cathode clamp diodes are for switching inductive loads.
- Can the Darlington pairs in the ULN2803ADW be connected in parallel for higher current capability?
Yes, the Darlington pairs may be connected in parallel for higher current capability.
