ADM485ARZ

Product Summary

The ADM485ARZ is a differential line transceiver suitable for high speed bidirectional data communication on multipoint bus transmission lines. It is designed for balanced data transmission and complies with EIA standards RS-485 and RS-422. The ADM485ARZ contains a differential line driver and a differential line receiver. Both the driver and the receiver can be enabled independently. When disabled, the outputs are three-stated. It operates from a single 5 V power supply. Excessive power dissipation caused by bus contention or by output shorting is prevented by a thermal shutdown circuit. If during fault conditions, a significant temperature increase is detected in the internal driver circuitry, this feature forces the driver output into a high impedance state.

Parametrics

ADM485ARZ absolute maximum ratings:(1)VCC: -0.3 V to +7 V; (2)Driver Input (DI): -0.3 V to VCC + 0.3 V; (3)Control Inputs (DE, RE): -0.3 V to VCC + 0.3 V; (4)Receiver Inputs (A, B): -9 V to +14 V; (5)Driver Outputs (A, B): -9 V to +14 V; (6)Receiver Output: -0.5 V to VCC + 0.5 V; (7)Power Dissipation 8-Lead MSOP: 900 mW and θJA, Thermal Impedance: 206°C/W; (8)Power Dissipation 8-Lead PDIP: 500 mW and θJA, Thermal Impedance: 130°C/W; (9)Power Dissipation 8-Lead SOIC : 450 mW and θJA, Thermal Impedance 170°C/W; (10)Operating Temperature Range: 0°C to 70°C for Commercial Range (J Version) and -40°C to +85°C for Industrial Range (A Version); (11)Storage Temperature Range: -65°C to +150°C; (12)Lead Temperature (Soldering, 10 sec): 300°C and Vapor Phase (60 sec): 215°C and Infrared (15 sec): 220°C.

Features

ADM485ARZ features:(1)Meets EIA RS-485 standard. (2)5 Mbps data rate. (3)Single 5 V supply. (4)–7 V to +12 V bus common-mode range. (5)High speed, low power BiCMOS. (6)Thermal shutdown protection. (7)Short-circuit protection. (8)Driver propagation delay: 10 ns typical. (9)Receiver propagation delay: 15 ns typical. (10)High-Z outputs with power off. (11)Superior upgrade for LTC485.

Diagrams