Overview
The ISO3082DWR is an isolated half-duplex differential line transceiver designed for TIA/EIA RS-485 and RS-422 applications, manufactured by Texas Instruments. This device is part of the ISO308x family, which includes isolated full- and half-duplex transceivers. The ISO3082DWR is ideal for use in long transmission lines due to its ability to break the ground loop, allowing for a larger common-mode voltage range. It features a symmetrical isolation barrier that provides 2500 V RMS of isolation for 60 seconds per UL 1577 between the bus-line transceiver and the logic-level interface. This isolation significantly increases protection against electrical noise transients and reduces the risk of damage to sensitive control circuits. The device is qualified for use over a temperature range of –40°C to +85°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (DW) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Signaling Rates | Up to 20 Mbps | - |
| Unit Load | 1/8 unit load | - |
| Nodes on a Bus | Up to 256 | - |
| Bus Capacitance | 16 pF (typical) | - |
| Transient Immunity | 50 kV/µs (typical) | - |
| ESD Protection | 12 kV HBM between bus pins and GND2, 6 kV HBM between bus pins and GND1 | - |
| Isolation Voltage | 2500 V RMS per UL 1577, 4000 V PK per CSA 62368-1 | - |
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 ISO3082DWR used for?
The ISO3082DWR is used as an isolated half-duplex differential line transceiver for TIA/EIA RS-485 and RS-422 applications.
- What is the operating temperature range of the ISO3082DWR?
The operating temperature range is –40°C to +85°C.
- What is the maximum signaling rate of the ISO3082DWR?
The maximum signaling rate is up to 20 Mbps.
- How many nodes can be supported on a bus with the ISO3082DWR?
Up to 256 nodes can be supported on a bus.
- What kind of ESD protection does the ISO3082DWR offer?
The device offers 12 kV HBM between bus pins and GND2, and 6 kV HBM between bus pins and GND1.
- What are the safety-related certifications of the ISO3082DWR?
The device has 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.
- What is the typical bus capacitance of the ISO3082DWR?
The typical bus capacitance is 16 pF.
- Does the ISO3082DWR have thermal shutdown protection?
Yes, the device includes thermal shutdown protection.
- Is the ISO3082DWR RoHS compliant?
Yes, the ISO3082DWR is RoHS compliant.
- What is the package type of the ISO3082DWR?
The package type is SOIC (DW) with 16 pins.
