Overview
The ISO7321CD is a robust and low-power, dual-channel digital isolator produced by Texas Instruments. This device is designed to provide galvanic isolation up to 3000 V RMS for 1 minute and 4242 V PK, ensuring high reliability and safety in various applications. It operates from 3.3 V and 5 V supply levels, making it versatile for different system requirements. The ISO7321CD features integrated noise filters and TTL input thresholds, enhancing its performance in harsh industrial environments where short noise pulses may be present.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VCC1, VCC2) | 3 to 5.5 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Data Transfer Rate | 25 | Mbps |
| Propagation Delay (Typical at 5V) | 33 | ns |
| Transient Immunity (Typical at 5V) | 65 | KV/μs |
| Isolation Voltage | 3000 | V RMS (1 minute) |
| Isolation Voltage (Peak) | 4242 | V PK |
| Package Type | SOIC-8 | |
| Number of Channels | 2 | |
| Channel Direction | Opposite |
Key Features
- Low Power Consumption: Typical ICC per channel at 1 Mbps - 1.7 mA (5 V Supplies), 1.2 mA (3.3 V Supplies)
- Integrated Noise Filter on the Inputs
- Default Output High and Low Options depending on the device suffix
- 3.3 V and 5 V Level Translation
- Wide Temperature Range: -40°C to 125°C
- Robust Electromagnetic Compatibility (EMC)
- System-level ESD, EFT, and Surge Immunity
- Low Emissions
- Isolation Barrier Life: > 25 Years
- Narrow Body SOIC-8 Package
Applications
The ISO7321CD is suitable for various industrial and automotive applications where galvanic isolation is crucial. It can be used in conjunction with mixed signal micro-controllers, digital-to-analog converters, transformer drivers, and voltage regulators to create isolated systems such as 4-20 mA current loops. The device is also applicable in environments requiring Profibus interfaces and other industrial communication standards.
Q & A
- What is the primary function of the ISO7321CD?
The ISO7321CD is a dual-channel digital isolator designed to provide galvanic isolation between two circuits. - What are the operating supply voltage ranges for the ISO7321CD?
The device operates from 3 V to 5.5 V supply levels. - What is the data transfer rate of the ISO7321CD?
The data transfer rate is up to 25 Mbps. - What is the propagation delay of the ISO7321CD?
The typical propagation delay at 5 V supplies is 33 ns. - What kind of noise immunity does the ISO7321CD offer?
The device offers 65 KV/μs transient immunity and integrated noise filters. - What are the isolation voltage ratings for the ISO7321CD?
The isolation voltage ratings are 3000 V RMS for 1 minute and 4242 V PK. - What is the operating temperature range of the ISO7321CD?
The operating temperature range is -40°C to 125°C. - What type of package does the ISO7321CD come in?
The device comes in a SOIC-8 package. - Does the ISO7321CD have any safety and regulatory approvals?
Yes, it has approvals such as UL 1577, VDE V 0884-10, and IEC 61010-1 standards. - What are some typical applications of the ISO7321CD?
It is used in industrial and automotive applications, including isolated 4-20 mA current loops and systems requiring Profibus interfaces.
