Overview
The ISO3082DWG4 from Texas Instruments is a high-performance, isolated half-duplex differential line transceiver designed for RS-485 and RS-422 applications. This device is part of the ISO308x family, which is known for its robust isolation and high-speed data transmission capabilities. The ISO3082DWG4 is housed in a 16-pin SOIC package and offers 2500 VRMS of isolation, making it suitable for applications requiring high electrical isolation and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Texas Instruments | |
| Package | 16-SOIC (0.295", 7.50mm Width) | |
| Technology | Capacitive Coupling | |
| Type | RS422, RS485 | |
| Isolated Power | No | |
| Number of Channels | 3 | |
| Inputs - Side 1/Side 2 | 2/1 | |
| Channel Type | Unidirectional | |
| Voltage - Isolation | 2500 Vrms | Vrms |
| Common Mode Transient Immunity (Min) | 25 kV/µs | kV/µs |
| Data Rate | 200 kbps | kbps |
| Voltage - Supply | 3.15 V ~ 5.5 V, 4.5 V ~ 5.5 V | V |
| Operating Ambient Temperature | -40°C to +85°C | °C |
Key Features
- Meets or exceeds TIA/EIA RS-485 requirements.
- Signaling rates up to 20 Mbps, though the ISO3082DWG4 is specified for 200 kbps.
- 1/8 unit load – supports up to 256 nodes on a bus.
- Thermal shutdown protection.
- Low bus capacitance – 16 pF (typical).
- 50 kV/μs typical transient immunity.
- Fail-safe receiver for bus open, short, idle conditions.
- 3.3-V inputs are 5-V tolerant.
- Bus-pin ESD protection – 12-kV HBM between bus pins and GND2, 6-kV HBM between bus pins and GND1.
- Safety-related certifications: 4000-VPK basic insulation, 560 VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17), 2500 VRMS isolation per UL 1577, and 4000 VPK isolation per CSA 62368-1.
Applications
- Security systems.
- Chemical production.
- Factory automation.
- Motor and motion control.
- HVAC and building automation networks.
- Networked security stations.
The ISO3082DWG4 is ideal for applications requiring high electrical isolation and reliability, especially in environments with long transmission lines and potential for electrical noise transients.
Q & A
- What is the primary function of the ISO3082DWG4?
The ISO3082DWG4 is a half-duplex differential line transceiver designed for RS-485 and RS-422 applications, providing electrical isolation between the bus and logic sides.
- What is the isolation voltage of the ISO3082DWG4?
The device provides 2500 VRMS of isolation between the bus and logic sides.
- What is the maximum data rate supported by the ISO3082DWG4?
The ISO3082DWG4 is specified for a data rate of 200 kbps.
- What are the operating supply voltage ranges for the ISO3082DWG4?
The device operates with supply voltages ranging from 3.15 V to 5.5 V on the logic side and 4.5 V to 5.5 V on the bus side.
- What is the operating temperature range of the ISO3082DWG4?
The device operates from -40°C to +85°C.
- Does the ISO3082DWG4 have built-in thermal shutdown protection?
Yes, the device includes thermal shutdown protection.
- What is the typical transient immunity of the ISO3082DWG4?
The device has a typical transient immunity of 50 kV/μs.
- Is the ISO3082DWG4 compliant with safety standards?
Yes, it meets various safety standards including 4000-VPK basic insulation, 560 VPK VIORM per DIN EN IEC 60747-17, 2500 VRMS isolation per UL 1577, and 4000 VPK isolation per CSA 62368-1.
- What are some common applications for the ISO3082DWG4?
Common applications include security systems, chemical production, factory automation, motor and motion control, HVAC and building automation networks, and networked security stations.
- Does the ISO3082DWG4 support multiple nodes on a bus?
Yes, it supports up to 256 nodes on a bus due to its 1/8 unit load capability.
