ADM1487EARZ Transceiver by Analog Devices Inc.

The ADM1487EARZ is a robust differential line transceiver from Analog Devices Inc., designed to facilitate bidirectional data communication on multipoint bus transmission lines. It is a member of the industry-standard 1487 family and is configured for half-duplex communication. This device is primarily used for balanced data transmission and is compliant with the EIA Standards RS-485 and RS-422.

Constructed with a high-speed, bipolar process, the ADM1487EARZ is capable of operating at data rates up to 10 Mbps. It includes an on-chip differential line driver and a differential input receiver. The driver features a three-state output, allowing for connection of multiple transceivers on a bus. When disabled, the driver outputs are in a high-impedance state, which minimizes the loading effect on the bus.

The receiver on the ADM1487EARZ has a fail-safe feature that ensures a logic high output if the inputs are open or shorted, or if they are connected to a terminated transmission line with all drivers disabled. This feature greatly enhances the reliability of the system by providing a known output state when the inputs are undriven.

Key features of the ADM1487EARZ include:

• Half-duplex RS-485/RS-422 transceiver
• 5V powered
• Data rates up to 10 Mbps
• Thermal shutdown protection
• Driver short-circuit current limiting
• Receiver input impedance: 12 kΩ minimum
• Up to 32 transceivers on the bus
• Industry-standard 75176 pinout
• Extended temperature range: -40°C to +85°C
• Available in an 8-lead SOIC package

The device is designed with an emphasis on flexibility and reliability, featuring an extended temperature range suitable for industrial environments. With its controlled driver slew rates, the ADM1487EARZ reduces the risk of data corruption due to EMI and cross talk. This makes it an ideal solution for complex systems such as factory automation, building automation, and process control networks.

The ADM1487EARZ transceiver is well-suited for applications that require high-speed data transfer, robust performance, and high noise immunity. Its small footprint and compliance with the stringent RS-485 and RS-422 standards make it a preferred choice for engineers and designers looking to implement reliable data communication in their systems.