Overview
The ADM489AR is a full-duplex, low-power, slew rate limited differential line transceiver produced by Analog Devices Inc. It is designed for communication on multipoint bus transmission lines and complies with both EIA Standards RS-485 and RS-422. This transceiver is suitable for balanced data transmission and features a single differential line driver and a single differential line receiver, making it ideal for full-duplex data transfer. The ADM489AR also includes an additional receiver and driver enable control, enhancing its functionality in various applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Protocol | RS422, RS485 |
| Number of Drivers/Receivers | 1/1 |
| Voltage - Supply | 4.5V ~ 5.5V |
| Data Rate | Up to 250 kbps |
| Operating Temperature | -40°C to +85°C |
| Input Impedance | 12 kΩ |
| Supply Current | 30 μA |
| Output Type | 3-State |
| Bus Common-Mode Range | -7 V to +12 V |
| ESD Protection | 2 kV EFT (IEC1000-4-4) |
Key Features
- Compliance with EIA Standards RS-485 and RS-422
- Full-duplex data transfer capability
- Single differential line driver and receiver
- Additional receiver and driver enable control
- Low power consumption (30 μA supply current)
- Slew rate limited drivers for low electromagnetic interference
- Short-circuit protection and thermal shutdown circuit
- Fail-safe feature for receiver outputs (logic high if inputs are unconnected)
- High EM immunity and noise immunity
- No need for external protection components like tranzorbs or surge suppressors
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 settings requiring reliable communication over long distances
Q & A
- What is the primary function of the ADM489AR?
The ADM489AR is a full-duplex differential line transceiver designed for balanced data transmission on multipoint bus transmission lines, complying with EIA Standards RS-485 and RS-422.
- What is the data rate capability of the ADM489AR?
The ADM489AR can transmit data at rates up to 250 kbps.
- What is the operating voltage range of the ADM489AR?
The operating voltage range is 4.5V to 5.5V.
- What is the operating temperature range of the ADM489AR?
The operating temperature range is -40°C to +85°C.
- How many transceivers can be connected on the bus?
Up to 32 transceivers can be connected on the differential bus due to the 12 kΩ input impedance.
- What protection features does the ADM489AR have?
The ADM489AR features short-circuit protection, thermal shutdown circuit, and high EM immunity. It also includes a fail-safe feature for receiver outputs.
- Does the ADM489AR require external protection components?
No, the ADM489AR does not require external protection components like tranzorbs or surge suppressors due to its internal protection circuitry.
- What is the significance of the slew rate limited drivers in the ADM489AR?
The slew rate limited drivers minimize electromagnetic emissions, reducing both conducted and radiated interference.
- What are some typical applications of the ADM489AR?
Typical applications include low power RS-485 and RS-422 systems, DTE-DCE interface, packet switching, local area networks, data concentration, data multiplexers, and ISDN.
- What package options are available for the ADM489AR?
The ADM489AR is available in 14-SOIC (Standard Small Outline Package) among other package options.
