Overview
The ADM485ANZ, 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 various industrial and commercial applications. The ADM485ANZ operates from a single 5 V power supply and features a BiCMOS technology that combines low power CMOS with fast switching bipolar technology. This component is known for its high speed, low power consumption, and robust protection features such as thermal shutdown and short-circuit protection.
Key Specifications
| Specification | Value |
|---|---|
| Data Rate | Up to 5 Mbps |
| Supply Voltage | Single 5 V |
| 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 |
| Output Impedance (Disabled) | High-Z |
| Package Options | 8-lead PDIP, 8-lead SOIC, 8-lead MSOP |
| Temperature Range | Commercial and Industrial |
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 disabled
- Fail-safe receiver feature for unconnected inputs
- ESD protection on all inputs and outputs
- High source and sink current capability on driver outputs
- Minimal driver propagation delays and low skew for reduced EMI
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 ADM485ANZ?
The ADM485ANZ supports data rates up to 5 Mbps.
- What is the supply voltage for the ADM485ANZ?
The ADM485ANZ operates from a single 5 V power supply.
- What is the bus common-mode range of the ADM485ANZ?
The bus common-mode range is -7 V to +12 V.
- Does the ADM485ANZ have thermal shutdown protection?
Yes, the ADM485ANZ features thermal shutdown protection to prevent excessive power dissipation.
- What are the package options for the ADM485ANZ?
The ADM485ANZ is available in 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages.
- What is the temperature range for the ADM485ANZ?
The ADM485ANZ is fully specified over the commercial and industrial temperature range.
- Does the ADM485ANZ have ESD protection?
Yes, all inputs and outputs of the ADM485ANZ contain protection against ESD.
- What is the fail-safe feature of the receiver in the ADM485ANZ?
The receiver features a fail-safe mechanism that results in a logic high output state if the inputs are unconnected (floating).
- How many transceivers can be connected on a bus simultaneously?
Up to 32 transceivers can be connected simultaneously on a bus, but only one driver should be enabled at any time.
- What is the output impedance of the driver when disabled or powered down?
The driver output is in a high impedance state when disabled or powered down.
