Overview
The ULN2003ANS, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs, each rated at 500 mA and capable of withstanding peak currents of 600 mA. It features high-voltage outputs up to 50 V and includes suppression diodes for driving inductive loads. The ULN2003ANS is designed to be compatible with various types of logic, including TTL, CMOS, and PMOS, making it versatile for a wide range of applications.
Key Specifications
| Parameter | Test Conditions | Unit | Min | Typ | Max |
|---|---|---|---|---|---|
| VCE(sat) (Collector-emitter Saturation Voltage) | II = 250 μA, IC = 100 mA | V | 0.9 | 1.1 | 1.3 |
| VCE(sat) (Collector-emitter Saturation Voltage) | II = 350 μA, IC = 200 mA | V | 1 | 1.3 | 1.6 |
| VI(on) (On-state Input Voltage) | VCE = 2 V, IC = 200 mA | V | -- | -- | 2.7 |
| IC (Continuous Collector Current) | mA | 500 | |||
| VO (Output Voltage) | V | 50 | |||
| tPLH (Propagation Delay Time, Low- to High-Level Output) | μs | 0.25 | 1 | ||
| tPHL (Propagation Delay Time, High- to Low-Level Output) | μs | 0.25 | 1 | ||
| TA (Operating Ambient Temperature Range) | °C | -40 | 70 |
Key Features
- High-voltage outputs up to 50 V
- 500 mA-rated collector current per channel (600 mA peak)
- Output clamp diodes for inductive load driving
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic
- Channels can be paralleled for higher current capability
- Series base resistor for each Darlington pair, allowing direct operation with TTL or 5 V CMOS devices
- Suppression diodes to protect against kick-back voltage from inductive loads
Applications
- Relay drivers
- Solenoid drivers
- Lamp drivers (including LED displays and filament lamps)
- DC motor drivers
- Thermal print-head drivers
- Line drivers and logic buffers
- Hammer drivers
Q & A
- What is the maximum collector current per channel of the ULN2003ANS?
The maximum collector current per channel is 500 mA, with a peak current of 600 mA.
- What is the maximum output voltage of the ULN2003ANS?
The maximum output voltage is 50 V.
- Are the inputs of the ULN2003ANS compatible with various logic types?
- What is the purpose of the suppression diodes in the ULN2003ANS?
The suppression diodes are included to protect against kick-back voltage from inductive loads.
- Can the channels of the ULN2003ANS be paralleled for higher current capability?
- What is the operating ambient temperature range of the ULN2003ANS?
The operating ambient temperature range is from -40°C to 70°C.
- What is the typical propagation delay time for the ULN2003ANS?
The typical propagation delay time is 1 μs for both low-to-high and high-to-low level outputs.
- What type of package is the ULN2003ANS available in?
The ULN2003ANS is available in a 16-pin SOP (Small Outline Package) package.
- Can the ULN2003ANS be used to drive DC motors and relays?
- How do the series base resistors in the ULN2003ANS facilitate its operation?
The series base resistors allow the ULN2003ANS to operate directly with TTL or 5 V CMOS devices.
