Overview
The ISO1176DWG4 from Texas Instruments is an isolated RS-485/Profibus transceiver designed to meet the stringent requirements of industrial communication systems. This device ensures reliable and high-speed data transmission while providing robust isolation and protection against electrical noise and transient events. The ISO1176DWG4 is housed in a 16-pin SOIC package and operates over a wide temperature range of -40°C to 85°C, making it suitable for various industrial and automation applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | -0.5 | 6 | V | |
| Signaling Rate | 40 | Mbps | ||
| Differential Output Voltage | 2.1 | V (54 Ω load) | ||
| Bus Capacitance | 10 | pF | ||
| Transient Immunity | 50 | kV/μs | ||
| Isolation Voltage | 4000 | VPK | ||
| Junction Temperature | 150 | °C | ||
| Storage Temperature | -65 | 150 | °C |
Key Features
- Meets or exceeds the requirements of EN 50170 and TIA/EIA-485-A standards.
- Signaling rates up to 40 Mbps.
- Differential output exceeds 2.1 V with a 54 Ω load.
- Low bus capacitance – 10 pF maximum.
- Supports up to 160 transceivers on a bus.
- Fail-safe receiver for bus open, short, or idle conditions.
- 3.3 V inputs are 5 V tolerant.
- Bus-pin ESD protection – 16 kV HBM between bus pins and GND2, 6 kV HBM between bus pins and GND1.
- Safety and regulatory approvals including 4000 VPK isolation, 560 VPK VIORM per DIN EN IEC 60747-17, and 2500 VRMS isolation rating per UL 1577.
Applications
- Profibus networks.
- Factory automation.
- Networked sensors.
- Motor and motion control systems.
- HVA (Heating, Ventilation, and Air Conditioning) and building automation networks.
- Networked security stations.
Q & A
- What is the maximum signaling rate of the ISO1176DWG4?
The ISO1176DWG4 supports signaling rates up to 40 Mbps.
- What is the differential output voltage of the ISO1176DWG4?
The differential output voltage exceeds 2.1 V with a 54 Ω load.
- How many transceivers can be supported on a bus with the ISO1176DWG4?
The ISO1176DWG4 supports up to 160 transceivers on a bus.
- What is the isolation voltage rating of the ISO1176DWG4?
The ISO1176DWG4 has an isolation voltage rating of 4000 VPK.
- What are the operating temperature ranges for the ISO1176DWG4?
The operating temperature range is -40°C to 85°C, and the storage temperature range is -65°C to 150°C.
- Does the ISO1176DWG4 have ESD protection?
Yes, the ISO1176DWG4 has bus-pin ESD protection – 16 kV HBM between bus pins and GND2, and 6 kV HBM between bus pins and GND1.
- Is the ISO1176DWG4 compliant with any specific standards?
Yes, it meets or exceeds the requirements of EN 50170 and TIA/EIA-485-A standards.
- What is the fail-safe mode of the receiver in the ISO1176DWG4?
The receiver has a fail-safe mode for bus open, short, or idle conditions.
- Are the inputs of the ISO1176DWG4 voltage tolerant?
Yes, the 3.3 V inputs are 5 V tolerant.
- What are some typical applications of the ISO1176DWG4?
Typical applications include Profibus networks, factory automation, networked sensors, motor and motion control systems, HVA and building automation networks, and networked security stations.
