Overview
The ISO1176DWR is a high-performance isolated RS-485/RS-422 transceiver from Texas Instruments. It integrates digital isolation technology and a differential communication interface, and is designed for industrial automation, power systems, building control, and industrial communication networks. This device integrates data isolation and RS-485 communication functionality into a single chip, significantly simplifying system design and improving noise immunity.
The ISO1176DWR employs TI’s advanced capacitive isolation technology, providing reliable electrical isolation between communication nodes and effectively preventing the impact of ground potential differences, surge voltages, and common-mode noise on the system. With its high data transmission rate, strong electromagnetic interference immunity, and industrial-grade reliability, this device is widely used in industrial buses, PLCs, smart meters, and new energy equipment.
Core parameters
| parameter | value |
| Product Type | Isolated RS-485/RS-422 transceiver |
| Isolation and withstand voltage | 2500VRMS (typical) |
| Data transmission rate | Up to 40Mbps |
| Communication Protocol | RS-485 / RS-422 |
| Node support | Multi-point bus communication |
| Operating voltage | 3V to 5.5V |
| Isolation technology | Capacitor isolation |
| ESD protection capability | high |
| Common-mode transient immunity (CMTI) | high |
| Encapsulation type | SOIC-16 Wide Body |
| Operating temperature range | -40°C to +125°C |
| Environmental standards | RoHS compliant |
Features
Integrated isolation and communication functions
The ISO1176DWR integrates a digital isolator and an RS-485 transceiver into a single chip, reducing the number of external components, PCB area, and system complexity.
High-speed RS-485 data transmission
It supports communication rates up to 40Mbps, meeting the needs of industrial Ethernet gateways, motion control, and high-speed data acquisition systems.
Excellent electrical isolation performance
It provides isolation up to 2500VRMS, effectively isolating electrical connections between systems at different potentials and enhancing equipment safety and reliability.
Strong anti-interference capability
The high common-mode transient immunity (CMTI) design enables the device to maintain stable communication in high-noise industrial environments and reduce the bit error rate.
Industrial-grade wide temperature operating range
Supports an operating temperature range of –40°C to +125°C, suitable for harsh industrial environments and equipment operating continuously for extended periods.
Typical application scenarios
Industrial automation systems
PLC, industrial controllers, fieldbus and factory automation equipment.
Electricity and energy equipment
Smart meters, frequency converters, power monitoring systems and energy storage equipment.
Building Automation
HVAC controllers, security systems, and building management networks.
Industrial communication gateway
Modbus, PROFIBUS and RS-485 network communication interfaces.
New energy system
Photovoltaic inverters, battery management systems (BMS), and charging pile equipment.
Comparative Advantage Analysis
| Performance indicators | ISO1176DWR | Discrete isolator + RS-485 solution |
| System integration | high | medium |
| PCB area | Small | Larger |
| Communication rate | Up to 40Mbps | Depending on the device combination |
| Anti-interference capability | excellent | generally |
| Development complexity | Low | higher |
| System reliability | high | medium |
ISO1176DWR is significantly superior to traditional discrete design solutions in terms of integration, anti-interference performance, and system reliability, and can effectively reduce development costs and maintenance difficulty.
Manufacturer Profile: Texas Instruments
Texas Instruments (TI) is a leading global manufacturer of analog and embedded semiconductors, with a rich portfolio of products in industrial interfaces, isolation technologies, and power management. TI’s ISO series of isolators and isolated communication products are widely used in industrial automation, new energy, and power electronics markets, and are known for their high reliability and long-term availability.
Why choose ISO1176DWR?
● Integrated digital isolation and RS-485 transceiver functionality
● Supports high-speed communication up to 40Mbps
● 2500VRMS isolation withstand voltage enhances system safety
● Excellent EMI and common-mode interference immunity
● Industrial-grade wide-temperature design adapts to harsh environments
● TI original quality and long-term supply guarantee
Frequently Asked Questions (FAQ)
Q1: What is the difference between ISO1176DWR and ordinary RS-485 transceivers?
ISO1176DWR integrates digital isolation, which not only provides RS-485 communication capability, but also effectively isolates electrical connections between systems with different potentials, improving equipment safety and anti-interference capability. Ordinary RS-485 transceivers usually require additional isolation devices.
Q2: Which industrial communication protocols is the ISO1176DWR compatible with?
This device is compatible with all communication protocols based on the RS-485/RS-422 physical layer, including Modbus RTU, PROFIBUS, BACnet, DMX512, as well as various industrial fieldbuses and custom communication networks.
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