Overview
The ADM485AR-REEL, produced by Analog Devices Inc., is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines. It complies with EIA standards RS-485 and RS-422, making it suitable for a variety of applications requiring reliable and efficient data transmission.
This transceiver operates from a single 5 V power supply and features a BiCMOS process, combining the benefits of low power CMOS with the fast switching capabilities of bipolar technology. The ADM485AR-REEL includes thermal shutdown protection and short-circuit protection, ensuring robust operation under various conditions.
Key Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 5 V |
| Data Rate | Up to 5 Mbps |
| Bus Common-Mode Range | -7 V to +12 V |
| Driver Propagation Delay | 10 ns typical |
| Receiver Propagation Delay | 15 ns typical |
| Thermal Shutdown | Yes |
| Short-Circuit Protection | Yes |
| ESD Protection | All inputs and outputs protected |
| Package Types | 8-Lead SOIC, 8-Lead MSOP |
Key Features
- Meets EIA RS-485 and RS-422 standards
- High speed, low power BiCMOS technology
- Thermal shutdown and short-circuit protection
- High-Z outputs when power is off or driver is disabled
- Fail-safe receiver output (logic high if inputs are unconnected)
- ESD protection on all inputs and outputs
- High source and sink current capability
- Supports up to 32 transceivers on a bus
Applications
- Low power RS-485 systems
- DTE/DCE interfaces
- Packet switching
- Local area networks (LANs)
- Data concentration and multiplexers
- Integrated services digital network (ISDN)
Q & A
- What is the primary function of the ADM485AR-REEL?
The ADM485AR-REEL is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines.
- What standards does the ADM485AR-REEL comply with?
The ADM485AR-REEL complies with EIA standards RS-485 and RS-422.
- What is the operating voltage of the ADM485AR-REEL?
The ADM485AR-REEL operates from a single 5 V power supply.
- What is the maximum data rate supported by the ADM485AR-REEL?
The ADM485AR-REEL supports data rates up to 5 Mbps.
- Does the ADM485AR-REEL have thermal shutdown protection?
Yes, the ADM485AR-REEL includes thermal shutdown protection to prevent excessive power dissipation.
- How many transceivers can be connected on a bus using the ADM485AR-REEL?
Up to 32 transceivers can be connected simultaneously on a bus.
- What type of ESD protection does the ADM485AR-REEL have?
The ADM485AR-REEL has ESD protection on all inputs and outputs.
- What is the fail-safe feature of the receiver in the ADM485AR-REEL?
The receiver has a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).
- What are the package types available for the ADM485AR-REEL?
The ADM485AR-REEL is available in 8-Lead SOIC and 8-Lead MSOP packages.
- What are some common applications of the ADM485AR-REEL?
Common applications include low power RS-485 systems, DTE/DCE interfaces, packet switching, local area networks (LANs), data concentration and multiplexers, and integrated services digital network (ISDN).
