Overview
The ADM489AR-REEL, 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 is particularly useful in applications requiring robust and reliable data transmission over long distances.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature | -40°C to +85°C | °C |
| Supply Voltage | 4.5 V to 5.5 V | V |
| Supply Current | 74 µA (max) | µA |
| Data Rate | 250 kbps | kbps |
| Input Impedance | 12 kΩ | kΩ |
| Bus Common-Mode Range | -7 V to +12 V | V |
| Receiver Hysteresis | 70 mV | mV |
| Package Type | 14-SOIC | - |
| Lead Free Status / RoHS Status | Lead free / RoHS Compliant | - |
| Number of Drivers/Receivers | 1/1 (with additional receiver and driver enable control for ADM489) | - |
Key Features
- Compliance with EIA RS-485 and RS-422 standards for balanced data transmission.
- Full-duplex operation with a single differential line driver and a single differential line receiver.
- Slew rate limited drivers to minimize electromagnetic interference.
- High input impedance (12 kΩ) allowing up to 32 transceivers on the differential bus.
- Thermal shutdown circuit to prevent excessive power dissipation during fault conditions.
- Fail-safe feature in the receiver resulting in a logic high output state if inputs are unconnected.
- Internal protection circuitry providing high EM immunity and noise immunity.
- Short-circuit protection and 2 kV EFT protection meeting IEC1000-4-4 standards.
Applications
- Low power RS-485 and RS-422 systems.
- DTE-DCE interface.
- Packet switching.
- Local area networks.
- Data concentration.
- Data multiplexers.
- Integrated services digital network (ISDN).
Q & A
- What are the operating temperature ranges for the ADM489AR-REEL?
The operating temperature range is from -40°C to +85°C.
- What is the supply voltage range for the ADM489AR-REEL?
The supply voltage range is from 4.5 V to 5.5 V.
- What is the maximum data rate supported by the ADM489AR-REEL?
The maximum data rate supported is 250 kbps.
- How many transceivers can be connected on the differential bus?
Up to 32 transceivers can be connected due to the high input impedance of 12 kΩ.
- What protection features does the ADM489AR-REEL have?
The device features thermal shutdown, short-circuit protection, and 2 kV EFT protection meeting IEC1000-4-4 standards.
- Does the ADM489AR-REEL comply with any specific communication standards?
Yes, it complies with both EIA RS-485 and RS-422 standards.
- What is the significance of the slew rate limited drivers in the ADM489AR-REEL?
The slew rate limited drivers minimize electromagnetic interference, both conducted and radiated.
- What is the fail-safe feature in the receiver of the ADM489AR-REEL?
The fail-safe feature results in a logic high output state if the inputs are unconnected (floating).
- Is the ADM489AR-REEL lead-free and RoHS compliant?
Yes, the device is lead-free and RoHS compliant.
- What is the package type of the ADM489AR-REEL?
The package type is 14-SOIC.
