Overview
The ULN2003LVDR is a 7-channel relay and inductive load sink driver produced by Texas Instruments. It is an upgrade of the popular ULN2003 family, offering enhanced performance and compatibility with a wide range of microcontrollers and logic interfaces. This device is designed to drive various loads such as relays, LEDs, and resistive loads, making it versatile for use in telecom, consumer, and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 7 | |
| Output Pullup Voltage | Up to 8 | V |
| Logic Input Compatibility | 3.3V to 5V CMOS, TTL, 1.8V | |
| Current Sink per Channel | 100mA (typical at 3V), 140mA (typical at 5V) | mA |
| Total Current Sink (all channels in parallel) | Up to 1A | A |
| Output Low Voltage (VOL) | 0.4V (typical) | V |
| Input Pull-down Resistor | 300kΩ | Ω |
| ESD Protection | 2kV HBM, 500V CDM | |
| Package Types | 16-Pin SOIC, 16-Pin TSSOP |
Key Features
- Improved input interface minimizing input DC current from external drivers
- Internal free-wheeling diodes for inductive kick-back protection
- Input RC snubber to eliminate spurious switching in noisy environments
- Internal input pull-down resistors allowing input logic to be tri-stated
- Low input and output leakage currents
- Easy to use parallel interface for increasing current sink capability
- ESD protection exceeding JESD 22 standards
Applications
- Relay and inductive load drivers in telecom, consumer, and industrial applications
- Lamp and LED displays
- Logic level shifting up to 8V
- Driving stepper motors and other resistive loads
- Max supply selector and logic level shifter configurations
Q & A
- What is the ULN2003LVDR used for?
The ULN2003LVDR is used as a 7-channel relay and inductive load sink driver, suitable for driving various loads such as relays, LEDs, and resistive loads.
- What are the compatible logic input levels for the ULN2003LVDR?
The device supports 3.3V to 5V CMOS logic, TTL, and 1.8V logic input levels.
- How much current can each channel of the ULN2003LVDR sink?
Each channel can sink up to 100mA (typical at 3V) and 140mA (typical at 5V).
- What is the total current sink capability when all channels are connected in parallel?
The total current sink capability is up to 1A when all 7 channels are connected in parallel.
- What type of protection does the ULN2003LVDR have against ESD?
The device has ESD protection exceeding JESD 22 standards, specifically 2kV HBM and 500V CDM.
- What are the available package types for the ULN2003LVDR?
The device is available in 16-Pin SOIC and 16-Pin TSSOP packages.
- How does the input RC snubber improve the performance of the ULN2003LVDR?
The input RC snubber helps prevent spurious switching in noisy environments, enhancing the device's noise tolerance.
- Can the ULN2003LVDR be used as a logic level shifter?
Yes, the device can be used for logic level shifting up to 8V and can operate as an inverting logic level shifter.
- What is the purpose of the internal free-wheeling diodes in the ULN2003LVDR?
The internal free-wheeling diodes provide protection against inductive kick-back when driving inductive loads.
- How do the internal input pull-down resistors function in the ULN2003LVDR?
The internal input pull-down resistors allow the input logic to be tri-stated, and they help in maintaining the input in a low state when not driven.
