ADM1486AR

The ADM1486AR RS-485 transceiver is a top-tier solution for industrial field equipment. It surpasses EIA RS-485 and EIA RS-422 standards and offers a blazing 30 Mbps data rate, making it perfect for real-time control and monitoring. Its low power consumption, thermal shutdown, and short-circuit protection ensure reliable and efficient operation in demanding industrial environments. With minimal skew and propagation delay, this transceiver guarantees accurate data synchronization. Additionally, it's recommended for PROFIBUS applications and serves as a superior upgrade for SN65ALS1176, all in a standard 8-lead SOIC package. In summary, the ADM1486AR is the epitome of high-performance, compliance, and safety in the realm of industrial communication.

·Industrial field equipment

The ADM1486 is a differential line transceiver suitable for high speed bidirectional data communication on multipoint bus transmission lines. It is designed for balanced data transmission, complies with EIA Standards RS-485 and RS-422, and is recommended for PROFIBUS applications. The part contains a differential line driver and a differential line receiver. Both the driver and the receiver may be enabled independently.When disabled or powered down,the driver outputs are high impedance.

The ADM1486 operates from a single 5 V power supply. Excessive power dissipation caused by bus contention or output shorting is prevented by short-circuit protection and thermal circuitry. Short-circuit protection circuits limit the maximum output current to ±200 mA during fault conditions.A thermal shutdown circuit senses if the die temperature rises above 150°C and forces the driver outputs into a high impedance state under this condition.

Up to 50 transceivers may be connected simultaneously on a bus, but only one driver should be enabled at a time. Therefore, it is important that the remaining disabled drivers do not load the bus.

To ensure this, the ADM1486 driver features high output impedance when disabled and when powered down. This minimizes the loading effect when the transceiver is not being used. The high impedance driver output is maintained over the entire common-mode voltage range from −7 V to +12 V.

The receiver contains a fail-safe feature that results in a logic high output state if the inputs are unconnected (floating).

The ADM1486 is fabricated on BiCMOS, an advanced mixed technology process combining low power CMOS with fast switching bipolar technology.All inputs and outputs contain protection against ESD; all driver outputs feature high source and sink current capability.An epitaxial layer is used to guard against latch-up.

The ADM1486 features extremely fast and closely matched switching, enable, and disable times. Minimal driver propagation delays permit transmission at data rates up to 30 Mbps while low skew minimizes EMI interference.

The part is fully specified over the commercial and industrial temperature range and is available in an 8-lead SOIC package.

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