ADM2484EBRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
MPN： ADM2484EBRWZ-RL7 ✓ 啟用中ADM2484EBRWZ-RL7 概覽
An isolated RS-485 transceiver is a device that combines a differential bus transceiver with galvanic isolation, typically using capacitive or magnetic coupling, to transmit data across a potential difference while preventing ground loops and protecting low-voltage logic from high-voltage transients. It sits within the hierarchy: isolated transceiver -> RS-485 transceiver -> interface IC -> semiconductor. This integration eliminates the need for external optocouplers and separate isolated power supplies, simplifying PCB design and improving reliability.
Key features include 5000 Vrms isolation rating, 500 kbps data rate, 25 kV/µs CMTI, and ±15 kV ESD protection on the bus pins. The device also features thermal shutdown protection and a wide operating temperature range of -40°C to +125°C. The iCoupler technology ensures consistent timing and low power consumption, with a typical quiescent current of 2.5 mA on VDD1 and 2.0 mA on VDD2.
Technically, the ADM2484E uses Analog Devices' iCoupler technology, which employs chip-scale transformers to isolate signals, providing superior performance compared to optocouplers in terms of speed, power, and reliability. The transceiver includes a differential driver and receiver, with the driver outputs Y and Z and receiver inputs A and B. For half-duplex operation, Y is tied to A and Z to B externally. The device also features a DE (driver enable) and RE (receiver enable) pins for bus control.
Typical applications include industrial fieldbus networks, building automation, HVAC systems, and motor control drives, where robust communication over long distances and noisy environments is required. The high CMTI and ESD protection make it suitable for harsh industrial settings.
When designing with this device, ensure proper decoupling on both VDD1 and VDD2 with 0.1 µF capacitors close to the pins. Also, terminate the bus properly (e.g., 120 Ω) to minimize reflections, and consider using a common-mode choke for enhanced EMI immunity.
直接替換替代品，適用於 ADM2484EBRWZ-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： ADM2484EBRWZ-RL7 （相同外形與佔位） — 差異在於 Isolation Voltage, Number of Channels, Type, Operating Temperature Range, ESD Protection.
ADM2484EBRWZ
✅ 直接替換✗ 缺貨
$3.1 / 單位
查看資料表 →ADM2483BRWZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →ADM2483BRWZ
✅ 直接替換✗ 缺貨
$3.8182 / 單位
查看資料表 →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-RL7 規格
| Type | Isolated RS-485/RS-422 Transceiver |
| Number of Channels | 3 (1 driver, 1 receiver, 1 isolation) |
| Isolation Voltage | 5000 Vrms |
| 資料速率 | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV (HBM) |
| Supply Voltage VDD1 | 3.0 V to 5.5 V |
| Supply Voltage VDD2 | 3.0 V to 3.6 V |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 16-SOIC (0.295", 7.50mm Width) |
| 安裝類型 | Surface Mount |
| Duplex | Half/Full |
| Number of Drivers/Receivers | 1/1 |
| RoHS 狀態 | Compliant |
| REACH Status | Compliant |
ADM2484EBRWZ-RL7 腳位配置
| 腳位 1 | VDD1 — Logic side supply voltage (3.0V to 5.5V) |
| 腳位 2 | GND1 — Logic side ground |
| 腳位 3 | DE — Driver enable (active high) |
| 腳位 4 | RE — Receiver enable (active low) |
| 腳位 5 | DI — Driver input |
| 腳位 6 | RO — Receiver output |
| 腳位 7 | VDD2 — Bus side supply voltage (3.0V to 3.6V) |
| 腳位 8 | GND2 — Bus side ground |
| 腳位 9 | A — Receiver input non-inverting |
| 腳位 10 | B — Receiver input inverting |
| 腳位 11 | Y — Driver output non-inverting |
| 腳位 12 | Z — Driver output inverting |
典型應用
ADM2484EBRWZ-RL7 適用於 6 應用s: Industrial Fieldbus Networks, Building Automation, Motor Control Drives, Medical Equipment, Solar Inverters, Transportation Systems.
Industrial Fieldbus Networks
The ADM2484EBRWZ-RL7 provides 5000 Vrms isolation and 500 kbps data rate, making it ideal for Modbus and PROFIBUS networks. Its high CMTI (25 kV/µs) ensures reliable communication in noisy industrial environments, while the integrated isolation eliminates ground loops and protects PLCs from transients. The device's ±15 kV ESD protection on the bus pins adds robustness in harsh factory settings.
推薦
Building Automation
In HVAC and lighting control systems, the ADM2484EBRWZ-RL7 enables reliable RS-485 communication over long distances. Its 5000 Vrms isolation protects controllers from ground potential differences between floors, and the 500 kbps data rate supports multiple devices on a bus. The wide operating temperature range (-40°C to +125°C) suits rooftop and outdoor installations.
推薦
Motor Control Drives
The ADM2484EBRWZ-RL7 is used in variable frequency drives (VFDs) to isolate the control logic from the high-voltage power stage. Its 5000 Vrms isolation and 25 kV/µs CMTI prevent noise from IGBT switching from corrupting data. The device's thermal shutdown protection ensures safe operation in high-temperature cabinets, and the ±15 kV ESD protection guards against cable discharge events.
推薦
Medical Equipment
The ADM2484EBRWZ-RL7 provides 5000 Vrms isolation, meeting safety requirements for patient-connected equipment. Its low power consumption and small SOIC package make it suitable for portable monitors and diagnostic devices. The high CMTI ensures reliable data transmission in the presence of electrosurgical interference, and the wide temperature range supports sterilization processes.
推薦
Solar Inverters
In solar power systems, the ADM2484EBRWZ-RL7 isolates the communication between the inverter and monitoring systems. Its 5000 Vrms isolation handles high common-mode voltages from the PV array, while the 500 kbps data rate supports real-time monitoring. The device's wide temperature range and high CMTI ensure reliable operation in outdoor environments with rapid voltage transients.
推薦
Transportation Systems
The ADM2484EBRWZ-RL7 is used in railway and automotive communication networks, where isolation is critical for safety. Its 5000 Vrms isolation protects against high-voltage surges, and the ±15 kV ESD protection withstands harsh electromagnetic environments. The device's wide temperature range and high CMTI make it suitable for traction control and signaling systems.
推薦
推薦產品摘要
工程參考資料，適用於 ADM2484EBRWZ-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 | ADM2484EBRWZ | ADM2483BRWZ-RL7 | ISO3082DW |
|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 2500 Vrms | 5000 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 200 kbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 50 kV/µs |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±16 kV |
| Supply Voltage VDD1 | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.15V to 5.5V |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +85°C |
主要差異化特點
- Higher isolation voltage (5000 Vrms) compared to ADM2483BRWZ-RL7 (對比ADM2483BRWZ-RL7)
- Higher data rate (500 kbps) compared to ISO3082DW (對比ISO3082DW)
- Wider operating temperature range (-40°C to +125°C) compared to ISO3082DW (對比ISO3082DW)
設計說明
Decouple VDD1 and VDD2 with 0.1 µF ceramic capacitors placed as close as possible to the pins. For noisy industrial environments, add a 10 µF electrolytic capacitor in parallel. Ensure VDD2 is within 3.0V to 3.6V; exceeding this range can damage the bus side.
Maintain a clearance of at least 8 mm between the logic side (VDD1/GND1) and bus side (VDD2/GND2) traces to preserve the 5000 Vrms isolation rating. Avoid routing high-voltage traces under the IC. Use a solid ground plane on each side, but do not connect GND1 and GND2 together.
For half-duplex operation, tie Y to A and Z to B externally. Do not forget to enable the driver (DE high) and receiver (RE low) appropriately. Terminate the bus with 120 Ω at both ends to prevent reflections. Also, consider adding a common-mode choke for enhanced EMI immunity.
合規資訊
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified.
