Overview
The ADM485EARZ is a 5 V low power EIA RS-485 transceiver produced by Analog Devices Inc. It is designed for balanced data transmission and complies with EIA standards RS-485 and RS-422. This transceiver is suitable for high-speed bidirectional data communication on multipoint bus transmission lines. It operates from a single 5 V power supply and features high speed, low power BiCMOS technology, making it an efficient choice for various applications.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Supply Voltage | 5 | V | Single supply voltage |
| Data Rate | Up to 5 Mbps | Mbps | Maximum data rate |
| Bus Common-Mode Range | -7 to +12 | V | Common-mode voltage range |
| Driver Propagation Delay | 10 ns (typical) | ns | Low to high and high to low |
| Receiver Propagation Delay | 15 ns (typical) | ns | |
| ESD Protection | ±15 kV (HBM) | kV | Human body model |
| Number of Transceivers on Bus | Up to 32 | ||
| Package Types | 8-lead PDIP, 8-lead SOIC, 8-lead MSOP | ||
| Operating Temperature Range | Commercial and industrial temperature ranges |
Key Features
- Meets EIA RS-485 and RS-422 standards
- High speed, low power BiCMOS technology
- Thermal shutdown protection and short-circuit protection
- High-Z outputs when powered off or disabled
- Fail-safe receiver feature with logic high output state for unconnected inputs
- ESD protection on RS-485 I/O pins (±15 kV HBM)
- Slew rate limited driver outputs to reduce EMI and data errors
Applications
- Low power RS-485 systems
- DTE/DCE interface
- Packet switching
- Local area networks (LANs)
- Data concentration and data multiplexers
- Integrated services digital network (ISDN)
Q & A
- What is the primary function of the ADM485EARZ? The ADM485EARZ is a differential line transceiver designed for high-speed bidirectional data communication on multipoint bus transmission lines.
- What standards does the ADM485EARZ comply with? The ADM485EARZ complies with EIA standards RS-485 and RS-422.
- What is the maximum data rate of the ADM485EARZ? The maximum data rate is up to 5 Mbps.
- What is the common-mode voltage range of the ADM485EARZ? The common-mode voltage range is -7 V to +12 V.
- How many transceivers can be connected on a bus? Up to 32 transceivers can be connected on a bus.
- What type of ESD protection does the ADM485EARZ have? The ADM485EARZ has ±15 kV ESD protection on RS-485 I/O pins (Human Body Model).
- What are the package types available for the ADM485EARZ? The ADM485EARZ is available in 8-lead PDIP, 8-lead SOIC, and 8-lead MSOP packages.
- What is the operating temperature range of the ADM485EARZ? The ADM485EARZ operates over commercial and industrial temperature ranges.
- Does the ADM485EARZ have thermal shutdown protection? Yes, the ADM485EARZ features thermal shutdown protection to prevent excessive power dissipation.
- What is the fail-safe feature of the receiver in the ADM485EARZ? The receiver has a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).
