Overview
The ISO3080DWR is an isolated full-duplex differential line driver and receiver produced by Texas Instruments. It is designed to meet or exceed TIA/EIA RS-485 requirements, making it suitable for various industrial and commercial applications. The device features a symmetrical isolation barrier that provides 2500 V RMS of isolation for 60 seconds per UL 1577, ensuring robust protection against electrical noise transients. This isolation is crucial for long transmission lines, as it breaks the ground loop and allows for a larger common-mode voltage range. The ISO3080DWR operates over a wide temperature range from –40°C to +85°C, enhancing its reliability in diverse environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (16) | - |
| Operating Temperature Range | –40 to 85 | °C |
| Signaling Rates | Up to 20 Mbps | - |
| Unit Load | 1/8 | - |
| Number of Nodes on a Bus | Up to 256 | - |
| Bus Capacitance | 16 pF (typical) | pF |
| Transient Immunity | 50 kV/µs (typical) | kV/µs |
| ESD Protection | 12 kV HBM between bus pins and GND2, 6 kV HBM between bus pins and GND1 | kV |
| Isolation Voltage | 2500 V RMS per UL 1577, 4000 V PK per CSA 62368-1 | V |
| Input Voltage Tolerance | 3.3-V inputs are 5-V tolerant | - |
Key Features
- Meets or exceeds TIA/EIA RS-485 requirements
- Signaling rates up to 20 Mbps
- 1/8 unit load – 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
- 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-V PK basic insulation, 560 V PK V IORM per DIN EN IEC 60747-17 (VDE 0884-17), 2500 V RMS isolation per UL 1577, 4000 V PK isolation per CSA 62368-1
Applications
- Security systems
- Chemical production
- Factory automation
- Motor and motion control
- HVAC and building automation networks
- Networked security stations
Q & A
- What is the ISO3080DWR used for?
The ISO3080DWR is used as an isolated full-duplex differential line driver and receiver for TIA/EIA 485/422 applications, particularly in industrial and commercial settings where robust isolation and high signaling rates are required.
- What are the key specifications of the ISO3080DWR?
The key specifications include signaling rates up to 20 Mbps, 1/8 unit load, up to 256 nodes on a bus, low bus capacitance of 16 pF, and transient immunity of 50 kV/µs. It also features ESD protection and various safety-related certifications.
- What is the operating temperature range of the ISO3080DWR?
The ISO3080DWR operates over a temperature range from –40°C to +85°C.
- What kind of isolation does the ISO3080DWR provide?
The ISO3080DWR provides 2500 V RMS of isolation for 60 seconds per UL 1577 between the bus-line transceiver and the logic-level interface.
- Is the ISO3080DWR compatible with 3.3V and 5V systems?
Yes, the ISO3080DWR has 3.3-V inputs that are 5-V tolerant.
- What are some common applications of the ISO3080DWR?
Common applications include security systems, chemical production, factory automation, motor and motion control, HVAC and building automation networks, and networked security stations.
- Does the ISO3080DWR have built-in protection against electrical noise transients?
Yes, the ISO3080DWR features thermal shutdown protection, fail-safe receiver for bus open, short, idle, and bus-pin ESD protection.
- What is the package type of the ISO3080DWR?
The ISO3080DWR comes in a SOIC (16) package.
- What are the safety certifications of the ISO3080DWR?
The ISO3080DWR has safety-related certifications including 4000-V PK basic insulation, 560 V PK V IORM per DIN EN IEC 60747-17 (VDE 0884-17), 2500 V RMS isolation per UL 1577, and 4000 V PK isolation per CSA 62368-1.
- How many nodes can be supported on a bus using the ISO3080DWR?
The ISO3080DWR can support up to 256 nodes on a bus due to its 1/8 unit load capability.
