Overview
The ISO7521CDW is a digital isolator produced by Texas Instruments, designed to provide high-voltage isolation in electronic circuits. This device is part of the ISO7521 series, which is known for its robust isolation capabilities and bidirectional communication channels. The ISO7521CDW is particularly suited for applications requiring noise immunity and signal integrity in harsh environments. It is widely used in industrial automation, automotive electronics, and medical devices, where reliable isolation is critical for safety and performance.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Isolation Voltage | 4243 | VRMS | UL 1 minute |
| Peak Isolation Voltage | 6000 | VPK | VDE |
| Signaling Rate | 1 | Mbps | Maximum |
| Propagation Delay | < 20 | ns | Typical |
| Operating Temperature | -40 to 105 | °C | |
| Transient Immunity | 50 | kV/µs | Typical |
| Supply Voltage | 3.3, 5 | V | |
| Input Threshold | TTL | ||
| Channels | 2 | Bidirectional | |
| Certifications | IEC 60950-1, IEC 61010-1, IEC 60601-1 | Enhanced insulation |
Key Features
- High isolation voltage of 4243 VRMS and 6000 VPK for robust protection.
- Bidirectional communication channels for versatile applications.
- Supports signaling rates up to 1 Mbps for high-speed data transfer.
- Low propagation delay (< 20 ns) ensures real-time signal integrity.
- Operates from 3.3 V or 5 V supplies, with 5 V-tolerant inputs for flexibility.
- Wide operating temperature range (-40°C to 105°C) for harsh environments.
- Certified to IEC standards for enhanced safety and reliability.
Applications
The ISO7521CDW is ideal for applications requiring high-voltage isolation and noise immunity. It is commonly used in:
- Industrial Automation: Isolating control signals in PLCs and motor drives.
- Automotive Electronics: Ensuring signal integrity in EV/HEV systems and battery management.
- Medical Devices: Providing safe isolation in patient monitoring and diagnostic equipment.
- Power Supplies: Protecting sensitive circuits in isolated power converters.
Q & A
What is the maximum signaling rate of the ISO7521CDW?
The ISO7521CDW supports a maximum signaling rate of 1 Mbps.
What is the isolation voltage of the ISO7521CDW?
The device provides an isolation voltage of 4243 VRMS and 6000 VPK.
What certifications does the ISO7521CDW hold?
It is certified to IEC 60950-1, IEC 61010-1, and IEC 60601-1 standards.
Can the ISO7521CDW operate from a 3.3 V supply?
Yes, it can operate from both 3.3 V and 5 V supplies.
What is the propagation delay of the ISO7521CDW?
The typical propagation delay is less than 20 ns.
What is the operating temperature range of the ISO7521CDW?
It operates from -40°C to 105°C.
How many channels does the ISO7521CDW have?
It has two bidirectional channels.
Is the ISO7521CDW suitable for automotive applications?
Yes, it is widely used in automotive electronics for signal isolation.
What is the transient immunity of the ISO7521CDW?
It has a typical transient immunity of 50 kV/µs.
Are the inputs of the ISO7521CDW 5 V-tolerant?
Yes, all inputs are 5 V-tolerant when operating from a 3.3 V supply.
