ADM2483BRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
MPN： ADM2483BRWZ-RL7 ✓ 啟用中ADM2483BRWZ-RL7 概覽
An isolated RS-485 transceiver is a device that combines an RS-485 physical layer transceiver with galvanic isolation between the logic side and the bus side. It is a key component in industrial communication networks, where it provides a robust, noise-immune interface over long cable runs while protecting sensitive control electronics from ground potential differences, surges, and transients. The isolation barrier is typically implemented using capacitive or magnetic coupling, as in Analog Devices' iCoupler technology, which offers superior performance compared to optocoupler-based solutions in terms of speed, power consumption, and reliability.
Key features of the ADM2483 include true fail-safe receiver inputs that guarantee a logic-high output when the bus is open, shorted, or idle, and chatter-free power-up/power-down protection that prevents spurious data during power cycling. The device supports up to 256 nodes on a bus, making it suitable for large multi-drop networks. Thermal shutdown protection prevents damage from excessive power dissipation. The wide operating temperature range of -40°C to +85°C ensures reliable operation in harsh industrial environments.
Technically, the ADM2483 uses iCoupler technology, which employs chip-scale transformers to transmit data across the isolation barrier, providing high common-mode transient immunity and reliable operation at high data rates. The driver outputs are slew-rate limited to reduce radiated emissions, and the receiver has a wide common-mode input range of -7V to +12V, accommodating large ground potential differences. The device is available in a 16-lead SOIC-W package, which is compact and suitable for space-constrained designs.
Typical applications include industrial fieldbus networks, building automation, HVAC systems, motor control, and remote data acquisition systems. The ADM2483 is ideal for applications requiring robust, isolated RS-485 communication over long distances, such as factory automation and process control.
When designing with the ADM2483, it is important to provide proper decoupling on both VDD1 and VDD2, and to ensure that the bus termination resistors are correctly placed to match the cable impedance. The isolation barrier should be maintained with adequate creepage and clearance distances on the PCB to meet safety standards.
直接替換替代品，適用於 ADM2483BRWZ-RL7 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADM2483BRWZ-RL7 （相同外形與佔位） — 差異在於 Data Rate, Isolation Voltage, Package, Type, Duplex.
ADM2483BRWZ
✅ 直接替換✗ 缺貨
$3.8182 / 單位
查看資料表 →ADM2483BRWZ-REEL
✅ 直接替換📋 參考替代品（不在目錄中）
ISO3082DW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ISO3088DW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADM2484EBRWZ
✅ 直接替換 ⚠️ 規格未經驗證✗ 缺貨
$3.1 / 單位
查看資料表 →ADM2483BRWZ-RL7 規格
| Type | Isolated RS-485 Transceiver |
| Number of Channels | 3 |
| Isolation Voltage | 2500 Vrms |
| 資料速率 | 500 kbps |
| Common-Mode Transient Immunity | >25 kV/µs |
| Supply Voltage (VDD1) | 3 V to 5.5 V |
| Supply Voltage (VDD2) | 5 V |
| 靜態電流 | 2.5 mA max |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 16-SOIC (0.295", 7.50mm Width) |
| 安裝類型 | Surface Mount |
| Number of Nodes | 256 |
| Fail-Safe | True fail-safe receiver inputs |
| Slew Rate | Slew-rate limited driver outputs |
| RoHS 狀態 | Compliant |
ADM2483BRWZ-RL7 腳位配置
| 腳位 1 | VDD1 — Logic supply voltage (3V to 5.5V) |
| 腳位 2 | GND1 — Logic ground |
| 腳位 3 | RO — Receiver output |
| 腳位 4 | RE — Receiver enable (active low) |
| 腳位 5 | DE — Driver enable (active high) |
| 腳位 6 | DI — Driver input |
| 腳位 7 | GND1 — Logic ground |
| 腳位 8 | NC — No connect |
| 腳位 9 | NC — No connect |
| 腳位 10 | A — Non-inverting bus line |
| 腳位 11 | B — Inverting bus line |
| 腳位 12 | GND2 — Bus ground |
| 腳位 13 | NC — No connect |
| 腳位 14 | NC — No connect |
| 腳位 15 | VDD2 — Bus supply voltage (5V) |
| 腳位 16 | GND2 — Bus ground |
典型應用
ADM2483BRWZ-RL7 適用於 6 應用s: Industrial Fieldbus Networks, Building Automation, Motor Control, Remote Data Acquisition, HVAC Systems, Process Control.
Industrial Fieldbus Networks
The ADM2483BRWZ-RL7 is ideal for industrial fieldbus networks such as PROFIBUS and Modbus, where robust, isolated RS-485 communication is required over long distances. Its 2500 Vrms isolation protects control electronics from ground potential differences and electrical noise, while the 500 kbps data rate is sufficient for most process control and automation applications. The device's high common-mode transient immunity (>25 kV/µs) ensures reliable data transmission in electrically noisy environments, and its support for up to 256 nodes allows for large multi-drop networks. The slew-rate-limited driver outputs minimize EMI, making it suitable for installations with sensitive equipment.
推薦
Building Automation
In building automation systems, the ADM2483BRWZ-RL7 provides reliable isolated RS-485 communication for HVAC controllers, lighting systems, and access control panels. Its low quiescent current (2.5 mA max) is beneficial for power-sensitive applications, and the wide operating temperature range (-40°C to +85°C) ensures operation in unconditioned spaces. The true fail-safe receiver inputs guarantee a defined logic state when the bus is idle, preventing false triggers. The device's isolation barrier protects the central controller from surges induced by long cable runs, enhancing system reliability. The compact 16-SOIC package is suitable for space-constrained control modules.
推薦
Motor Control
The ADM2483BRWZ-RL7 is well-suited for motor control systems, where isolated RS-485 communication is used to link motor drives to a central controller. The high common-mode transient immunity (>25 kV/µs) is critical in motor drive environments, where switching transients can cause ground bounce and noise. The device's isolation barrier protects the low-voltage control circuitry from the high-voltage motor drive side. The 500 kbps data rate is adequate for transmitting speed and position commands, and the slew-rate-limited outputs reduce EMI that could interfere with nearby sensors. The device's thermal shutdown protection ensures safe operation under fault conditions.
推薦
Remote Data Acquisition
For remote data acquisition systems, the ADM2483BRWZ-RL7 provides a robust isolated RS-485 interface for transmitting sensor data over long distances. Its low power consumption (2.5 mA max) is ideal for battery-powered or energy-harvesting remote nodes. The wide common-mode input range (-7V to +12V) accommodates large ground potential differences between remote sensors and the central data logger. The true fail-safe receiver inputs ensure reliable data when the bus is idle, and the isolation barrier protects the data logger from surges induced by lightning or other transients. The device's compact package and wide temperature range make it suitable for outdoor installations.
推薦
HVAC Systems
In HVAC systems, the ADM2483BRWZ-RL7 enables reliable isolated RS-485 communication between thermostats, controllers, and central building management systems. Its 2500 Vrms isolation protects against ground loops and electrical noise from compressors and fans. The device's low quiescent current is beneficial for always-on communication links, and the wide operating temperature range (-40°C to +85°C) ensures operation in rooftop units and mechanical rooms. The true fail-safe receiver inputs prevent false commands during bus idle, and the slew-rate-limited outputs reduce EMI that could affect other building systems. The compact package fits easily into HVAC control boards.
推薦
Process Control
The ADM2483BRWZ-RL7 is ideal for process control systems, where isolated RS-485 communication is used to connect field instruments, PLCs, and control valves. Its high common-mode transient immunity (>25 kV/µs) ensures reliable operation in industrial environments with heavy electrical noise. The device's isolation barrier protects the control system from ground potential differences and surges, enhancing safety and reliability. The 500 kbps data rate is sufficient for most process control loops, and the support for up to 256 nodes allows for large distributed control systems. The device's thermal shutdown protection prevents damage under fault conditions, and its wide temperature range ensures operation in harsh industrial settings.
推薦
推薦產品摘要
工程參考資料，適用於 ADM2483BRWZ-RL7 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADM2483BRWZ | ADM2483BRWZ-REEL | ISO3082DW | ISO3088DW | ADM2484EBRWZ |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Texas Instruments | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 20 Mbps | 20 Mbps |
| Common-Mode Transient Immunity | >25 kV/µs | >25 kV/µs | >25 kV/µs | >25 kV/µs | >25 kV/µs | >25 kV/µs |
| Supply Voltage (VDD1) | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 3.15V to 5.5V | 3.15V to 5.5V | 3V to 5.5V |
| Quiescent Current | 2.5 mA max | 2.5 mA max | 2.5 mA max | 2.5 mA max | 2.5 mA max | 2.5 mA max |
| Number of Nodes | 256 | 256 | 256 | 256 | 256 | 256 |
主要差異化特點
- Integrated iCoupler isolation (對比ISO3082DW)
- True fail-safe receiver inputs (對比ISO3082DW)
- Wide supply voltage range on logic side (對比ISO3082DW)
設計說明
Place decoupling capacitors (0.1 µF and 10 µF) close to VDD1 and VDD2 pins to ensure stable operation. Use a solid ground plane for GND1 and GND2, but keep them separated to maintain isolation. Ensure adequate creepage and clearance distances between the logic and bus sides to meet safety standards.
Route the differential bus lines (A and B) as a twisted pair or with controlled impedance to minimize reflections. Place termination resistors (typically 120 ohms) at both ends of the bus. Keep the isolation barrier clear of copper traces to maintain the isolation rating.
Do not exceed the absolute maximum ratings for VDD1 and VDD2. Ensure that the bus side is properly powered even when the logic side is off to avoid undefined states. Use the fail-safe feature to ensure a known receiver output when the bus is idle. Avoid floating the DE and RE pins; tie them to appropriate logic levels.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
