ADM485ARZ

Product Overview

• Category: Integrated Circuit (IC)
• Use: RS-485/RS-422 Transceiver
• Characteristics: High-speed, half-duplex communication, low power consumption
• Package: SOIC-8
• Essence: Transmits and receives data over long distances using differential signaling
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Data Rate: Up to 2.5 Mbps
• Operating Temperature Range: -40°C to +85°C
• Number of Drivers/Receivers: 1/1
• Receiver Input Sensitivity: ±200mV
• Driver Output Current: ±60mA
• ESD Protection: ±15kV (Human Body Model)

Detailed Pin Configuration

1. A/B: Differential Bus Terminals
2. B/A: Differential Bus Terminals
3. GND: Ground
4. RxD/DE: Receiver Output / Driver Enable
5. TxD/RE: Transmitter Input / Receiver Enable
6. Vcc: Power Supply
7. RO: Receiver Output
8. DI: Driver Input

Functional Features

• Supports half-duplex communication
• Allows multiple transceivers on the same bus
• Provides fail-safe receiver inputs
• Low power shutdown mode for power saving
• Thermal shutdown protection
• Short-circuit protection on driver outputs

Advantages

• High-speed data transmission
• Robust performance in noisy environments
• Wide operating temperature range
• Low power consumption
• Easy integration into existing systems

Disadvantages

• Limited to half-duplex communication
• Requires external components for complete functionality
• Not suitable for applications requiring full-duplex communication

Working Principles

ADM485ARZ is a half-duplex RS-485/RS-422 transceiver that uses differential signaling to transmit and receive data over long distances. It converts the single-ended signals from the UART or microcontroller into balanced differential signals suitable for transmission over twisted-pair cables. The transceiver employs a differential line driver and receiver to provide robust communication in noisy environments.

Detailed Application Field Plans

1. Industrial Automation: ADM485ARZ is widely used in industrial automation systems for reliable communication between PLCs, sensors, and actuators.
2. Building Automation: It is employed in building automation systems to connect various devices such as HVAC controllers, lighting control panels, and access control systems.
3. Security Systems: The transceiver finds application in security systems for connecting surveillance cameras, alarm panels, and access control readers.
4. Automotive Electronics: ADM485ARZ is utilized in automotive electronics for communication between different modules like engine control units, body control modules, and instrument clusters.

Detailed and Complete Alternative Models

1. MAX485: Similar functionality and pin configuration, available in DIP and SOIC packages.
2. SN75176: Compatible with ADM485ARZ, offers higher data rates, available in PDIP and SOIC packages.
3. LTC2850: Provides enhanced ESD protection, operates at higher temperatures, available in MSOP and DFN packages.

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