Overview
The ISO3086TDW is a high-performance, isolated differential line transceiver designed by Texas Instruments for RS-485 and RS-422 applications. This device is part of the ISO3086T family and is distinguished by its integrated transformer driver, which provides the primary voltage for an isolation transformer. It operates in full-duplex mode but can be easily configured for half-duplex operation. The ISO3086TDW is known for its robust isolation barrier, high signaling rate, and enhanced protection against electrical noise and transients.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage (VCC1, VCC2) | 4.5 | 5 | 5.5 | V |
| Operating Temperature | -40 | 85 | °C | |
| Signaling Rate | 20 | Mbps | ||
| Differential Load Resistance | 54 | 60 | Ω | |
| Output Current (Driver) | -60 | 60 | mA | |
| Output Current (Receiver) | -8 | 8 | mA | |
| Junction Temperature | 150 | °C | ||
| Maximum Power Dissipation | 490 | mW | ||
| Isolation Voltage (Transient) | 4242 | VPK | ||
| Isolation Voltage (Repetitive Peak) | 566 | VPK |
Key Features
- Meets or exceeds TIA/EIA-485-A standards.
- Signaling rate up to 20 Mbps.
- 1/8 unit load, supporting up to 256 nodes on a bus.
- Thermal shutdown protection.
- Integrated transformer driver for isolation.
- High isolation rating: 4242 VPK transient, 566 VPK repetitive peak.
- Wide supply range: 4.5V to 5.5V.
- Enhanced common-mode transient immunity (CMTI) of 25 kV/μs.
- Full-duplex operation with easy configuration for half-duplex mode.
Applications
The ISO3086TDW is ideal for various industrial and commercial applications requiring reliable and isolated communication. These include:
- Industrial automation and control systems.
- Networked security stations.
- Long transmission lines where ground loop issues are prevalent.
- Systems requiring high protection against electrical noise and transients.
Q & A
- What is the primary function of the ISO3086TDW?
The ISO3086TDW is an isolated differential line transceiver designed for RS-485 and RS-422 applications, providing high-speed and isolated communication. - What is the maximum signaling rate of the ISO3086TDW?
The maximum signaling rate is up to 20 Mbps. - How many nodes can be supported on a bus using the ISO3086TDW?
It supports up to 256 nodes on a bus due to its 1/8 unit load capability. - What is the operating temperature range of the ISO3086TDW?
The operating temperature range is from -40°C to 85°C. - What is the isolation voltage rating of the ISO3086TDW?
The device has a transient isolation voltage rating of 4242 VPK and a repetitive peak isolation voltage rating of 566 VPK. - Can the ISO3086TDW be configured for half-duplex operation?
Yes, it can be easily configured for half-duplex operation by connecting specific pins. - What is the common-mode transient immunity (CMTI) of the ISO3086TDW?
The CMTI is 25 kV/μs. - What are the typical applications of the ISO3086TDW?
It is used in industrial automation, networked security stations, and long transmission lines where high isolation and protection are required. - What is the package type and pin count of the ISO3086TDW?
The device comes in a SOIC (DW) package with 16 pins. - Does the ISO3086TDW have thermal shutdown protection?
Yes, it includes thermal shutdown protection.
