Overview
The ADM485AN is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines. It is manufactured by Analog Devices Inc. and complies with EIA standards RS-485 and RS-422. This transceiver operates from a single 5 V power supply and is suitable for balanced data transmission in various applications. The ADM485AN features a differential line driver and a differential line receiver, both of which can be enabled independently. It also includes thermal shutdown protection and short-circuit protection to prevent excessive power dissipation during fault conditions.
Key Specifications
| Parameter | Min | Typ | Max | Units | Test Conditions/Comments |
|---|---|---|---|---|---|
| Data Rate | 5 | Mbps | |||
| Voltage - Supply | 4.75 | 5.25 | V | ||
| Operating Temperature | -40 | 85 | °C | ||
| Package / Case | 8-DIP (0.300", 7.62mm) | ||||
| Mounting Type | Through Hole | ||||
| Driver Propagation Delay | 10 | ns | Typical | ||
| Receiver Propagation Delay | 15 | ns | Typical | ||
| Bus Common-Mode Range | -7 | +12 | V |
Key Features
- Meets EIA RS-485 standard.
- High speed, low power BiCMOS technology.
- Single 5 V power supply.
- Thermal shutdown protection and short-circuit protection).
- High-Z outputs with power off).
- Fail-safe feature in the receiver, resulting in a logic high output state if the inputs are unconnected (floating)).
- ESD protection on all inputs and outputs).
- High source and sink current capability on driver outputs).
- Epitaxial layer to guard against latch-up).
Applications
- Low power RS-485 systems).
- DTE/DCE interface).
- Packet switching).
- Local area networks (LANs)).
- Data concentration).
- Data multiplexers).
- Integrated services digital network (ISDN)).
Q & A
- What is the data rate of the ADM485AN?
The ADM485AN has a data rate of 5 Mbps.
- What is the operating voltage range of the ADM485AN?
The operating voltage range is from 4.75 V to 5.25 V).
- What is the operating temperature range of the ADM485AN?
The operating temperature range is from -40°C to 85°C).
- What type of package does the ADM485AN come in?
The ADM485AN comes in an 8-DIP (0.300", 7.62mm) package).
- Does the ADM485AN have thermal shutdown protection?
Yes, the ADM485AN has thermal shutdown protection to prevent excessive power dissipation during fault conditions).
- What is the bus common-mode range of the ADM485AN?
The bus common-mode range is from -7 V to +12 V).
- Can the driver and receiver of the ADM485AN be enabled independently?
Yes, both the driver and receiver can be enabled independently).
- What is the propagation delay of the driver and receiver in the ADM485AN?
The driver propagation delay is typically 10 ns, and the receiver propagation delay is typically 15 ns).
- Does the ADM485AN have ESD protection?
Yes, the ADM485AN has ESD protection on all inputs and outputs).
- What are some common applications of the ADM485AN?
Common applications include low power RS-485 systems, DTE/DCE interface, packet switching, local area networks (LANs), data concentration, data multiplexers, and integrated services digital network (ISDN)).
