ADM2484EBRWZ-RL7 - Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2484EBRWZ-RL7 ✓ Hoạt độngADM2484EBRWZ-RL7 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADM2484EBRWZ-RL7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADM2484EBRWZ-RL7 (cùng hình factor và footprint) — khác nhau ở Isolation Voltage, Number of Channels, Type, Operating Temperature Range, ESD Protection.
ADM2484EBRWZ
✅ Drop-In✗ Hết hàng
$3.1 / Đơn vị
Xem tài liệu →ADM2483BRWZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADM2483BRWZ
✅ Drop-In✗ Hết hàng
$3.8182 / Đơn vị
Xem tài liệu →ISO3082DW
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ISO3088DW
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADM2484EBRWZ-RL7 Thông số kỹ thuật
| Type | Isolated RS-485/RS-422 Transceiver |
| Number of Channels | 3 (1 driver, 1 receiver, 1 isolation) |
| Isolation Voltage | 5000 Vrms |
| Tốc độ dữ liệu | 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 |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 16-SOIC (0.295", 7.50mm Width) |
| Kiểu lắp đặt | Surface Mount |
| Duplex | Half/Full |
| Number of Drivers/Receivers | 1/1 |
| Trạng thái RoHS | Compliant |
| REACH Status | Compliant |
Cấu hình chân ADM2484EBRWZ-RL7
| Chân 1 | VDD1 — Logic side supply voltage (3.0V to 5.5V) |
| Chân 2 | GND1 — Logic side ground |
| Chân 3 | DE — Driver enable (active high) |
| Chân 4 | RE — Receiver enable (active low) |
| Chân 5 | DI — Driver input |
| Chân 6 | RO — Receiver output |
| Chân 7 | VDD2 — Bus side supply voltage (3.0V to 3.6V) |
| Chân 8 | GND2 — Bus side ground |
| Chân 9 | A — Receiver input non-inverting |
| Chân 10 | B — Receiver input inverting |
| Chân 11 | Y — Driver output non-inverting |
| Chân 12 | Z — Driver output inverting |
Ứng dụng tiêu biểu
ADM2484EBRWZ-RL7 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADM2484EBRWZ-RL7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Higher isolation voltage (5000 Vrms) compared to ADM2483BRWZ-RL7 (vsADM2483BRWZ-RL7)
- Higher data rate (500 kbps) compared to ISO3082DW (vsISO3082DW)
- Wider operating temperature range (-40°C to +125°C) compared to ISO3082DW (vsISO3082DW)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS and REACH compliant per Analog Devices product page. Not AEC-Q100 qualified.
