ISL81485IU-T

Product Overview

Category: Integrated Circuit (IC)

Use: The ISL81485IU-T is a high-speed, quad-channel digital isolator designed for use in industrial applications. It provides galvanic isolation between different circuits, ensuring safe and reliable data transmission.

Characteristics: - High-speed data transfer up to 100 Mbps - Quad-channel configuration - Wide operating voltage range: 2.5V to 5.5V - Low power consumption - Robust ESD protection - Small package size for space-constrained applications

Package: The ISL81485IU-T is available in a small outline integrated circuit (SOIC) package. This package offers excellent thermal performance and ease of handling during assembly.

Essence: The essence of the ISL81485IU-T lies in its ability to provide reliable and secure communication between different circuits while maintaining electrical isolation. This is crucial in industrial environments where noise, voltage spikes, and ground potential differences can pose significant challenges.

Packaging/Quantity: The ISL81485IU-T is typically supplied in tape and reel packaging, with 2500 units per reel.

Specifications

• Supply Voltage Range: 2.5V to 5.5V
• Data Rate: Up to 100 Mbps
• Isolation Voltage: 2500Vrms
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay: 10 ns (max)
• Rise/Fall Time: 4 ns (typ)
• Power Consumption: 1.8 mA (typ)

Detailed Pin Configuration

The ISL81485IU-T features a 16-pin SOIC package with the following pin configuration:

Pin 1: VDD1 Pin 2: GND1 Pin 3: CH1A Pin 4: CH1B Pin 5: NC Pin 6: VDD2 Pin 7: GND2 Pin 8: CH2A Pin 9: CH2B Pin 10: NC Pin 11: VDD3 Pin 12: GND3 Pin 13: CH3A Pin 14: CH3B Pin 15: NC Pin 16: VDD4

Functional Features

• High-speed data transmission: The ISL81485IU-T supports data rates of up to 100 Mbps, enabling fast and efficient communication between isolated circuits.
• Quad-channel configuration: With four independent channels, the IC allows simultaneous isolation of multiple signal paths, increasing flexibility in system design.
• Robust ESD protection: The device incorporates robust electrostatic discharge (ESD) protection, safeguarding against transient voltage spikes and enhancing reliability.
• Low power consumption: The IC is designed to minimize power consumption, making it suitable for battery-powered applications or systems with strict power constraints.

Advantages and Disadvantages

Advantages: - High-speed data transfer capability - Quad-channel configuration for versatile system integration - Wide operating voltage range for compatibility with various circuitry - Small package size for space-constrained applications - Robust ESD protection for enhanced reliability

Disadvantages: - Limited to industrial applications, may not be suitable for other sectors - Requires careful consideration of isolation voltage requirements in specific designs

Working Principles

The ISL81485IU-T utilizes a combination of optical and magnetic coupling techniques to achieve galvanic isolation. Each channel consists of an infrared LED, photodiode, and a high-speed digital isolator. When a signal is transmitted from one side, it is converted into light pulses by the LED, which are then received and converted back into electrical signals by the photodiode on the other side. This optical isolation ensures that there is no direct electrical connection between the input and output sides, providing protection against voltage spikes and noise.

Detailed Application Field Plans

The ISL81485IU-T finds extensive use in various industrial applications, including:

1. Motor Control Systems: The IC can be employed in motor control systems to provide isolation between the control circuitry and power electronics, ensuring safe and reliable operation.
2. Industrial Automation: It is suitable for isolating communication interfaces, such as RS-485 or CAN bus, in industrial automation systems, protecting sensitive equipment from electrical disturbances.
3. Power Inverters: The IC can be utilized in power inverters to isolate the control signals from the high-voltage power stage, preventing potential damage to control circuitry.
4. PLC (Programmable Logic Controller) Systems: It enables isolation between different modules within a PLC system, enhancing system reliability and reducing the risk of data corruption.

Detailed and Complete Alternative Models

1. ADuM1401: A quad-channel digital isolator with similar specifications and features.