ADM2483BRWZ - Isolated RS-485 Transceiver | Analog Devices
料号： ADM2483BRWZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.5455 | $6.55 |
| 10 | $4.7273 | $47.27 |
| 100 | $4.1818 | $418.18 |
| 500 | $4 | $2,000.00 |
| 1,000 | $3.8182 | $3,818.20 |
ADM2483BRWZ 概述
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. It uses capacitive or magnetic coupling (such as Analog Devices' iCoupler technology) to transfer data across an isolation barrier, protecting sensitive logic from high voltages, ground loops, and noise. In the hierarchy of isolation components, a digital isolator falls under the category of isolation ICs, which are essential in industrial automation, motor control, and communication interfaces where safety and signal integrity are paramount.
Key features of the ADM2483BRWZ include 2500 Vrms isolation voltage, 25 kV/µs common-mode transient immunity (CMTI), and a wide operating temperature range of -40°C to +85°C. The logic side can be powered with either 5 V or 3 V, while the bus side requires a 5 V supply. The device features a 3-channel configuration (one driver and two receiver channels) and supports half-duplex communication. Its low power consumption of 2.5 mA max makes it suitable for power-sensitive applications.
Technically, the ADM2483BRWZ uses iCoupler technology, which employs chip-scale transformers to provide isolation, offering advantages over optocouplers in terms of speed, reliability, and power efficiency. The device includes thermal shutdown protection and is available in a 16-lead SOIC-W package with a standard 7.50 mm width. The slew-limited driver reduces electromagnetic interference, and the receiver has a wide common-mode input range, enhancing noise immunity.
Typical applications include industrial fieldbus networks, PROFIBUS, Modbus, building automation, and HVAC systems. The device is ideal for isolating RS-485 buses in harsh environments where ground potential differences exist between nodes. Its high CMTI ensures reliable operation in the presence of fast transients, such as those from motor drives or lightning surges.
When designing with the ADM2483BRWZ, ensure proper decoupling on both the logic and bus sides, and terminate the bus correctly to minimize reflections. The device is RoHS compliant and lead-free, making it suitable for environmentally conscious designs.
直接替换替代料： ADM2483BRWZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADM2483BRWZ （相同外形与封装尺寸） ——差异在于 Duplex, Data Rate, Number of Channels, Isolation Voltage, Package.
快速对比工具——选择替代料号进行并排对比：
ADM2483BRWZ-REEL
📋 参考替代料（不在目录中）
ADM2483BRW-REEL
📋 参考替代料（不在目录中）
ADM2483BRW
📋 参考替代料（不在目录中）
ISO3082DW
📋 参考替代料（不在目录中）
ISO35DW
📋 参考替代料（不在目录中）
ADM2483BRWZ 规格参数
| Type | Isolated RS-485/RS-422 Transceiver |
| Number of Channels | 3 |
| Isolation Voltage | 2500 Vrms |
| 数据速率 | 500 kbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (Logic Side) | 3 V or 5 V |
| Supply Voltage (Bus Side) | 5 V |
| 工作温度范围 | -40°C to +85°C |
| 封装 | 16-SOIC (0.295", 7.50mm Width) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| REACH Status | Unaffected |
| MSL 等级 | 1 (Unlimited) |
| Driver Outputs | Slew-limited |
| Compliance | ANSI EIA/TIA-485-A, ISO 8482:1987 (E) |
ADM2483BRWZ 引脚配置
| 引脚 1 | VDD1 — Logic side supply voltage (3V or 5V) |
| 引脚 2 | GND1 — Logic side ground |
| 引脚 3 | RO — Receiver output |
| 引脚 4 | RE — Receiver enable (active low) |
| 引脚 5 | DE — Driver enable (active high) |
| 引脚 6 | DI — Driver input |
| 引脚 7 | GND1 — Logic side ground |
| 引脚 8 | NC — No connect |
| 引脚 9 | VDD2 — Bus side supply voltage (5V) |
| 引脚 10 | GND2 — Bus side ground |
| 引脚 11 | A — Non-inverting bus line |
| 引脚 12 | B — Inverting bus line |
| 引脚 13 | GND2 — Bus side ground |
| 引脚 14 | NC — No connect |
| 引脚 15 | NC — No connect |
| 引脚 16 | VDD1 — Logic side supply voltage |
典型应用
ADM2483BRWZ 适用于 6 应用s: Industrial Fieldbus Networks, Building Automation and HVAC, Process Control and Instrumentation, Motor Control and Drives, Renewable Energy and Solar Inverters, Transportation and Rail.
Industrial Fieldbus Networks
The ADM2483BRWZ is ideal for industrial fieldbus networks such as Modbus and PROFIBUS. Its 500 kbps data rate and 2500 Vrms isolation ensure reliable communication over long distances in electrically noisy environments. The high CMTI of 25 kV/µs protects against transients from motors and other industrial equipment, while the slew-limited driver reduces EMI. The device's wide operating temperature range (-40°C to +85°C) suits factory floor conditions. It can be used as a drop-in replacement in existing RS-485 nodes, providing galvanic isolation to prevent ground loops and protect sensitive controllers.
推荐
Building Automation and HVAC
In building automation systems, the ADM2483BRWZ provides isolated RS-485 communication between HVAC controllers, sensors, and actuators. Its 3 V logic-side supply allows direct interfacing with low-power microcontrollers, while the 5 V bus side drives long cable runs. The isolation barrier protects control panels from ground potential differences between floors or buildings. The device's low power consumption (2.5 mA max) is beneficial for always-on systems. Its compliance with ANSI TIA/EIA RS-485-A ensures interoperability with standard building automation protocols like BACnet MS/TP.
推荐
Process Control and Instrumentation
The ADM2483BRWZ is used in process control systems to isolate RS-485 links between PLCs, sensors, and actuators. Its 2500 Vrms isolation protects against voltage surges and ground loops in industrial plants. The 500 kbps data rate is sufficient for most process control applications, and the high CMTI ensures reliable operation in the presence of electromagnetic interference from heavy machinery. The device's robust design and wide temperature range make it suitable for harsh environments. It can be used in both point-to-point and multipoint configurations, supporting up to 64 nodes on a bus.
推荐
Motor Control and Drives
In motor control systems, the ADM2483BRWZ provides isolated communication between the drive controller and the fieldbus. Its high CMTI of 25 kV/µs is critical in the presence of fast switching transients from IGBTs and MOSFETs. The isolation barrier protects the low-voltage control circuitry from the high-voltage bus. The device's slew-limited driver reduces EMI, which is important in motor drive cabinets. The 500 kbps data rate is adequate for parameter setting and status monitoring. The wide temperature range ensures reliable operation near motors that generate heat.
推荐
Renewable Energy and Solar Inverters
The ADM2483BRWZ is used in solar inverters and wind turbines for isolated RS-485 communication between the inverter controller and monitoring systems. Its 2500 Vrms isolation protects against high voltages and transients in power conversion equipment. The device's high CMTI ensures reliable operation in the presence of switching noise from the inverter. The wide operating temperature range (-40°C to +85°C) suits outdoor installations. The low power consumption is beneficial for energy-efficient systems. The device's compliance with RS-485 standards ensures compatibility with standard monitoring protocols.
推荐
Transportation and Rail
In railway and transportation systems, the ADM2483BRWZ provides isolated RS-485 communication for signaling, diagnostics, and passenger information systems. Its 2500 Vrms isolation meets safety requirements for electrical isolation between different subsystems. The high CMTI ensures reliable operation in the presence of electromagnetic interference from traction motors and overhead lines. The device's wide temperature range and robust design make it suitable for harsh environments. The 500 kbps data rate is sufficient for control and monitoring applications. The device's compliance with RS-485 standards ensures interoperability with existing infrastructure.
推荐
推荐产品汇总
工程参考数据： ADM2483BRWZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADM2483BRWZ-REEL | ADM2483BRW-REEL | ISO3082DW |
|---|---|---|---|---|
| Package | 16-SOIC (7.50mm) | 16-SOIC (7.50mm) | 16-SOIC (7.50mm) | 16-SOIC (7.50mm) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 200 kbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage (Logic) | 3V or 5V | 3V or 5V | 3V or 5V | 5V only |
| Operating Temperature | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C | -40°C to +85°C |
| RoHS | Compliant | Compliant | Non-compliant | Compliant |
关键差异点
- Dual supply voltage on logic side (3V or 5V) （对比 ISO3082DW)
- Higher data rate (500 kbps vs 200 kbps) （对比 ISO3082DW)
- RoHS compliant version available （对比 ADM2483BRW)
设计说明
Place decoupling capacitors (0.1 µF and 10 µF) close to both VDD1 and VDD2 pins to ensure stable operation. Use a solid ground plane on both sides of the isolation barrier, but do not connect GND1 and GND2 together except through the isolation barrier. Keep the isolation barrier clear of copper traces to maintain the specified isolation voltage.
Route the differential bus lines (A and B) as a twisted pair or parallel traces with controlled impedance (typically 120 ohms). Keep the traces as short as possible and avoid stubs. Place the termination resistor (120 ohms) at both ends of the bus. Ensure the isolation barrier is not bridged by any traces or vias to maintain isolation integrity.
Do not exceed the absolute maximum ratings for supply voltage or bus voltage. Ensure the bus side is powered with 5V only; applying 3V to VDD2 may cause malfunction. Also, verify that the logic side supply (VDD1) is within the specified range (3V to 5.5V). Incorrect termination can cause reflections and data errors; always terminate the bus at both ends.
合规信息
RoHS3 compliant and REACH unaffected per PartGenie listing. Not AEC-Q100 qualified as it is not an automotive-grade part.
