ULN2003ADRG3

The ULN2003ADRG3 from Texas Instruments is a versatile 7-channel Darlington transistor array designed for high-voltage and high-current applications. Each channel features an NPN Darlington pair with common-cathode clamp diodes, suitable for switching inductive loads. The device offers a switching voltage of up to 50V and a peak output current of 500mA per channel. The inputs are compatible with CMOS and TTL logic levels, and the device includes a 2.7kΩ series base resistor for direct operation with TTL or 5V logic.

This array is ideal for driving relays, solenoids, lamps, and other high-current loads. The ULN2003ADRG3 is available in a 16-SOIC surface-mount package, facilitating integration into various electronic designs. Its operating temperature range is -40°C to 70°C, making it suitable for a wide array of environmental conditions. The device's output configuration is low-side, and it includes output clamp diodes for protection against inductive voltage transients.

Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The Darlington pairs can be paralleled for increased current capability when needed. The ULN2003ADRG3 provides a robust solution for interfacing low-logic-level signals to high-power loads.