Overview
The ISO7421D is a dual-channel digital isolator manufactured by Texas Instruments. It is designed to provide high-speed, high-efficiency signal isolation with capacitive isolation technology. This component is widely used in applications requiring robust noise immunity and signal integrity, such as industrial automation, motor control, and medical electronics. The ISO7421D is surface-mounted and comes in an SOIC-8 package, making it suitable for compact and high-density PCB designs. Its key competitive advantages include a high isolation voltage of 2500 Vrms, low power consumption, and fast propagation delay.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 3.3 V, 5 V | V | |
| Isolation Voltage | 2500 | Vrms | |
| Data Rate | 1 | Mbps | |
| Propagation Delay | 9 | ns | |
| Number of Channels | 2 | ||
| Output Current | 15 | mA | |
| Power Consumption | 390 | mW | Max |
| Operating Temperature | -40 to 105 | °C | |
| Package | SOIC-8 | ||
| Rise/Fall Time | 2 | ns | Max |
Key Features
- High-speed capacitive isolation with a data rate of up to 1 Mbps.
- Dual-channel configuration for bidirectional signal isolation.
- High isolation voltage of 2500 Vrms for enhanced safety and noise immunity.
- Low power consumption with a maximum supply current of 2 mA.
- Wide operating temperature range from -40°C to 105°C, suitable for harsh environments.
Applications
The ISO7421D is ideal for applications requiring reliable signal isolation and noise immunity. Its primary use cases include:
- Industrial Automation: Ensures signal integrity in noisy industrial environments.
- Motor Control: Provides isolation in motor drive circuits to protect sensitive control systems.
- Medical Electronics: Ensures patient safety by isolating medical devices from high-voltage circuits.
- Power Supplies: Used in isolated power supply designs to enhance efficiency and safety.
Q & A
1. What is the isolation voltage of the ISO7421D?
The isolation voltage is 2500 Vrms.
2. What is the maximum data rate supported by the ISO7421D?
The maximum data rate is 1 Mbps.
3. What is the operating temperature range of the ISO7421D?
The operating temperature range is -40°C to 105°C.
4. How many channels does the ISO7421D have?
It has two channels.
5. What is the package type of the ISO7421D?
It comes in an SOIC-8 package.
6. What is the typical propagation delay of the ISO7421D?
The typical propagation delay is 9 ns.
7. Can the ISO7421D operate with a 3.3 V supply?
Yes, it supports both 3.3 V and 5 V supplies.
8. Is the ISO7421D suitable for motor control applications?
Yes, it is widely used in motor control for signal isolation.
9. What is the maximum output current of the ISO7421D?
The maximum output current is 15 mA.
10. Does the ISO7421D have over-temperature protection?
No, it does not include over-temperature protection.
