Overview
The ISO1432DWR is a digital isolator chip manufactured by Texas Instruments, designed for robust industrial applications. This component is part of the ISO14xx family, specifically tailored for TIA/EIA RS-485 and RS-422 applications. It provides electrical isolation between communication nodes, breaking ground loops and enabling a wider common-mode voltage range. The ISO1432DWR is ideal for long-distance communication in harsh environments, offering high noise immunity and protection against electrostatic discharge (ESD) and electrical fast transients (EFT). Its wide operating temperature range and dual power supply options make it a versatile choice for industrial automation, automotive, and communication systems.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Isolation Voltage | 5000 | V RMS | Tested for 1 minute per UL 1577 |
| Supply Voltage (Side 1) | 1.71 - 5.5 | V | Compatible with low-voltage FPGAs and ASICs |
| Supply Voltage (Side 2) | 3 - 5.5 | V | No need for regulated power on isolated side |
| Operating Temperature | -40 to +125 | °C | Suitable for harsh environments |
| ESD Protection | High Level | - | IEC standards, no additional components required |
| EFT Protection | High Level | - | IEC standards, no additional components required |
| Package | SOIC(16) | - | 10.30mm x 7.50mm |
Key Features
- High noise immunity for industrial environments.
- Electrical isolation up to 5000V RMS for enhanced safety.
- Wide supply voltage range for compatibility with various systems.
- Robust ESD and EFT protection without additional components.
- Extended operating temperature range (-40°C to +125°C).
Applications
The ISO1432DWR is widely used in industrial automation, automotive electronics, and communication systems. Its ability to break ground loops and handle high common-mode voltages makes it suitable for long-distance communication in noisy environments. In industrial settings, it ensures reliable data transmission in motor control, process automation, and power management systems. In automotive applications, it supports CAN bus communication and battery management systems. Additionally, it is employed in RS-485/RS-422 networks for building automation and telecommunications.
Q & A
1. What is the isolation voltage of the ISO1432DWR?
The isolation voltage is 5000V RMS, tested for 1 minute per UL 1577.
2. What is the operating temperature range?
The device operates from -40°C to +125°C.
3. Does the ISO1432DWR require additional ESD protection?
No, it includes high-level ESD protection per IEC standards.
4. What power supply range does it support on Side 1?
Side 1 supports 1.71V to 5.5V.
5. What is the package size of the ISO1432DWR?
It comes in a 10.30mm x 7.50mm SOIC(16) package.
6. Is the ISO1432DWR suitable for automotive applications?
Yes, it is ideal for automotive electronics, including CAN bus and battery management systems.
7. Can it be used in RS-485 networks?
Yes, it is specifically designed for RS-485 and RS-422 applications.
8. Does it support low-voltage FPGA connections?
Yes, its Side 1 supply voltage range is compatible with low-voltage FPGAs.
9. What is the benefit of its electrical isolation?
It breaks ground loops and enables a wider common-mode voltage range.
10. Is the ISO1432DWR suitable for harsh environments?
Yes, it is designed for robust performance in industrial and automotive environments.
