Overview
The ADM489ARU-REEL7, produced by Analog Devices Inc., is a low power, full-duplex differential line transceiver designed for communication on multipoint bus transmission lines. It complies with both EIA RS-485 and RS-422 standards, making it suitable for balanced data transmission. The device operates from a single 5 V ± 10% power supply and features a slew rate limited driver to minimize electromagnetic interference. It includes a thermal shutdown circuit to prevent excessive power dissipation and a fail-safe feature that ensures a logic high output state if the inputs are unconnected or floating.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Supply Voltage | 4.5 V to 5.5 V | V | |
| Operating Temperature | -40°C to +85°C | °C | |
| Data Rate | Up to 250 kbps | kbps | |
| Input Impedance | 12 kΩ | Ω | Allows up to 32 transceivers on the bus |
| Receiver Hysteresis | 70 mV | mV | For noise suppression |
| Package Type | 14-SOIC | Surface Mount | |
| Number of Drivers/Receivers | 1/1 | ||
| Bus Common-Mode Range | -7 V to +12 V | V | |
| Short-Circuit Output Current | 85 mA | mA | VOUT = GND or VCC |
| Power Supply Current | 30 μA to 60 μA | μA | Outputs unloaded, receivers enabled |
Key Features
- Compliance with EIA RS-485 and RS-422 standards
- Full-duplex operation with a single differential line driver and receiver
- Slew rate limited drivers to minimize electromagnetic interference
- Thermal shutdown circuit to prevent excessive power dissipation
- Fail-safe feature ensuring a logic high output state if inputs are unconnected or floating
- High level of robustness with internal protection circuitry
- Low power consumption with a supply current of 30 μA to 60 μA
- Extended temperature range operation from -40°C to +85°C
- High immunity to electromagnetic interference and 2 kV EFT protection
Applications
- Low power RS-485 and RS-422 systems
- DTE-DCE interface
- Packet switching
- Local area networks
- Data concentration and data multiplexers
- Integrated services digital network (ISDN)
- Industrial control systems
- Networking equipment
- Data acquisition systems
Q & A
- What are the primary standards that the ADM489ARU-REEL7 complies with?
The ADM489ARU-REEL7 complies with both EIA RS-485 and RS-422 standards.
- What is the operating voltage range of the ADM489ARU-REEL7?
The operating voltage range is 4.5 V to 5.5 V.
- What is the maximum data rate supported by the ADM489ARU-REEL7?
The maximum data rate supported is up to 250 kbps.
- What is the input impedance of the ADM489ARU-REEL7?
The input impedance is 12 kΩ, allowing up to 32 transceivers on the bus.
- What type of protection does the ADM489ARU-REEL7 have against excessive power dissipation?
The device features a thermal shutdown circuit to prevent excessive power dissipation.
- What is the receiver hysteresis of the ADM489ARU-REEL7?
The receiver hysteresis is 70 mV, which helps in noise suppression.
- What is the package type of the ADM489ARU-REEL7?
The package type is 14-SOIC, which is a surface mount type.
- How many drivers and receivers does the ADM489ARU-REEL7 have?
The device has one driver and one receiver.
- What is the bus common-mode range of the ADM489ARU-REEL7?
The bus common-mode range is -7 V to +12 V.
- What are some common applications of the ADM489ARU-REEL7?
Common applications include low power RS-485 and RS-422 systems, DTE-DCE interfaces, packet switching, local area networks, data concentration, data multiplexers, and ISDN.
