ADM2687EBRIZ - 5kV Isolated RS-485 Transceiver | Analog Devices
MPN： ADM2687EBRIZ ✓ 啟用中ADM2687EBRIZ 概覽
An isolated RS-485 transceiver is a component that combines a differential bus transceiver with galvanic isolation, allowing data transmission between systems with different ground potentials. It typically includes a digital isolator for signal isolation and an integrated DC-to-DC converter for isolated power, eliminating the need for separate isolated power supplies. This integration simplifies PCB design and reduces component count, making it a key building block in industrial automation, building control, and instrumentation systems.
Key features include 5 kV rms isolation, ±15 kV ESD protection on the RS-485 pins, compliance with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987(E), and a configurable half- or full-duplex interface. The integrated isoPower converter provides up to 500 mW of isolated power, and the device operates from a single 5V supply. The wide operating temperature range of -40°C to +85°C ensures reliability in harsh environments.
The ADM2687E uses Analog Devices' proprietary isoPower technology, which integrates a DC-to-DC converter using chip-scale transformers, eliminating the need for external isolated power modules. The device also features a thermal shutdown and a watchdog timer for enhanced system protection. Its high CMTI of 25 kV/µs ensures reliable operation in noisy industrial environments.
Typical applications include industrial fieldbus networks, PROFIBUS, Modbus, building automation, and HVAC systems. The device is also suitable for isolated data acquisition systems and motor control interfaces. Its integrated power and signal isolation make it a compact solution for space-constrained designs.
When designing with the ADM2687EBRIZ, ensure proper PCB layout with adequate creepage and clearance distances for the 5 kV isolation rating. Place the isolation barrier components carefully to maintain isolation integrity. Also, consider the thermal dissipation of the integrated DC-to-DC converter, especially at high data rates and loads.
直接替換替代品，適用於 ADM2687EBRIZ — 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： ADM2687EBRIZ （相同外形與佔位） — 差異在於 Duplex, Package, ESD Protection, Operating Temperature, Data Rate.
ADM2687EBRIZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →ADM2682EBRIZ
✅ 直接替換聯絡詢價
查看資料表 →ADM2587EBRIZ
✅ 直接替換 ⚠️ 規格未經驗證📋 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）
ISL32704EIBZ
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADM2687EBRIZ 規格
| Isolation Voltage | 5000 Vrms |
| 資料速率 | 500 kbps |
| Number of Channels | 3 |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV |
| 供應電壓 | 5 V |
| Isolated Power | 500 mW |
| Duplex | Half/Full |
| 封裝 | 16-SOIC (0.295", 7.50mm Width) |
| 工作溫度 | -40°C to +85°C |
| Standards Compliance | ANSI/TIA/EIA-485-A-98, ISO 8482:1987(E) |
| RoHS | Compliant |
| 安裝類型 | Surface Mount |
| Number of Drivers/Receivers | 1/1 |
ADM2687EBRIZ 腳位配置
| 腳位 1 | VCC — Logic supply voltage (5V) |
| 腳位 2 | GND — Logic ground |
| 腳位 3 | TXD — Transmit data input |
| 腳位 4 | RXD — Receive data output |
| 腳位 5 | DE — Driver enable |
| 腳位 6 | RE — Receiver enable |
| 腳位 7 | A — Non-inverting bus line |
| 腳位 8 | B — Inverting bus line |
| 腳位 9 | GND — Isolated ground |
| 腳位 10 | VISO — Isolated power output |
| 腳位 11 | GND — Isolated ground |
| 腳位 12 | Y — Driver output (non-inverting) |
| 腳位 13 | Z — Driver output (inverting) |
| 腳位 14 | GND — Isolated ground |
| 腳位 15 | VISO — Isolated power output |
| 腳位 16 | GND — Isolated ground |
典型應用
ADM2687EBRIZ 適用於 6 應用s: Industrial Fieldbus Networks, Building Automation and HVAC, Isolated Data Acquisition Systems, Motor Control Interfaces, PROFIBUS Networks, Smart Grid and Energy Management.
Industrial Fieldbus Networks
The ADM2687EBRIZ is ideal for industrial fieldbus networks such as PROFIBUS and Modbus, where robust isolation and ESD protection are critical. Its 5 kV rms isolation and ±15 kV ESD protection ensure reliable communication in harsh environments with ground potential differences. The integrated isoPower converter simplifies design by providing isolated power without external components, reducing board space and cost. With a data rate of 500 kbps, it meets the requirements of most fieldbus protocols, and its high CMTI of 25 kV/µs ensures immunity to fast transients common in industrial settings.
推薦
Building Automation and HVAC
In building automation systems, the ADM2687EBRIZ provides isolated RS-485 communication for HVAC controllers, lighting systems, and access control panels. Its integrated power isolation eliminates the need for separate isolated power supplies, simplifying installation and reducing maintenance. The wide operating temperature range of -40°C to +85°C ensures reliable operation in rooftop units and mechanical rooms. The device's compliance with ANSI/TIA/EIA-485-A-98 ensures interoperability with existing building management systems, and its 500 kbps data rate is sufficient for most BACnet and Modbus applications.
推薦
Isolated Data Acquisition Systems
The ADM2687EBRIZ is well-suited for isolated data acquisition systems where sensors and controllers are at different ground potentials. Its 5 kV rms isolation protects sensitive measurement circuitry from ground loops and common-mode noise. The integrated isoPower converter provides clean isolated power for the transceiver and can also power external isolated components, reducing system complexity. With a data rate of 500 kbps, it can handle high-speed data streams from multiple sensors, and its ±15 kV ESD protection ensures robustness in industrial environments.
推薦
Motor Control Interfaces
In motor control systems, the ADM2687EBRIZ provides isolated communication between the controller and motor drives, preventing ground loops and protecting against voltage transients. Its high CMTI of 25 kV/µs ensures reliable operation in the presence of fast switching transients from IGBTs and MOSFETs. The integrated isoPower converter eliminates the need for an external isolated power supply, simplifying the design of multi-axis systems. The device's 500 kbps data rate is adequate for transmitting control signals and feedback data, and its wide temperature range supports operation in industrial motor control cabinets.
推薦
PROFIBUS Networks
The ADM2687EBRIZ is designed for PROFIBUS DP networks, which require isolated RS-485 transceivers with data rates up to 12 Mbps. While the ADM2687E supports only 500 kbps, it is suitable for PROFIBUS PA (process automation) applications that operate at lower speeds. Its 5 kV rms isolation and ±15 kV ESD protection ensure reliable communication in process plants with harsh electromagnetic environments. The integrated isoPower converter simplifies the design of PROFIBUS PA segments, reducing component count and board space.
推薦
Smart Grid and Energy Management
In smart grid applications, the ADM2687EBRIZ provides isolated communication between energy meters, distribution automation devices, and control centers. Its 5 kV rms isolation protects against high-voltage transients and ground potential differences in substations. The integrated isoPower converter enables compact designs for space-constrained meter enclosures. With a data rate of 500 kbps, it supports standard protocols like IEC 61850 and Modbus, and its wide temperature range ensures reliable operation in outdoor environments.
推薦
工程參考資料，適用於 ADM2687EBRIZ — 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 | ADM2687EBRIZ-RL7 | ADM2682EBRIZ | ADM2587EBRIZ | ISO3082DW | ISL32704EIBZ |
|---|---|---|---|---|---|---|
| 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 | Analog Devices | Texas Instruments | Renesas Electronics |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 16 Mbps | 500 kbps | 200 kbps | 40 Mbps |
| Integrated Power | Yes (500 mW) | Yes (500 mW) | Yes (500 mW) | Yes (500 mW) | No | No |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±16 kV | ±8 kV |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 50 kV/µs | 50 kV/µs |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 3.3 V |
主要差異化特點
- Integrated isoPower DC-DC converter (對比ISO3082DW)
- Higher isolation voltage (對比ISL32704EIBZ)
- Higher ESD protection (對比ISL32704EIBZ)
設計說明
For 5 kV rms isolation, ensure PCB creepage and clearance distances meet the required standards. Typically, a minimum of 8 mm creepage is needed for 5 kV rms. Place the isolation barrier components (transformers, capacitors) with proper spacing to maintain isolation integrity. Use a solid ground plane under the logic side and isolated ground plane under the bus side, with a slot cut between them to prevent leakage currents.
The integrated isoPower converter provides up to 500 mW of isolated power. Ensure the total load on VISO does not exceed this limit. If additional isolated power is needed, consider using an external isolated DC-DC converter. Decouple VCC and VISO with 0.1 µF and 10 µF capacitors placed close to the pins to reduce noise and ensure stable operation.
The ADM2687EBRIZ dissipates power internally due to the integrated DC-DC converter. At maximum load and data rate, the junction temperature may rise significantly. Ensure adequate thermal relief by providing copper pour on the PCB and, if necessary, a thermal pad. The operating temperature range is -40°C to +85°C, so verify that the junction temperature stays within limits under worst-case conditions.
合規資訊
RoHS compliant per distributor listings. No AEC-Q100 qualification indicated for this part.
