ADM2687EBRIZ-RL7 - 5kV Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2687EBRIZ-RL7 ✓ نشطADM2687EBRIZ-RL7 نظرة عامة
An isolated RS-485 transceiver is a type of digital isolator that combines a differential line driver and receiver with galvanic isolation, allowing data transmission across a potential difference while protecting the system from ground loops and high-voltage transients. It is a key component in industrial automation, building control, and instrumentation systems where reliable long-distance communication is essential. The ADM2687E integrates the isolation barrier and power conversion into a single package, simplifying design and improving system reliability.
Key features include 5 kV rms isolation, ±15 kV ESD protection on the RS-485 pins, and compliance with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987 (E) standards. The device supports both half-duplex and full-duplex configurations, making it versatile for various bus topologies. The integrated isoPower DC-to-DC converter provides a regulated output, reducing external component count and board space.
Technically, the ADM2687E uses Analog Devices' proprietary iCoupler technology for signal isolation and isoPower for isolated power transfer. This architecture ensures high reliability and low power consumption. The device operates over a wide temperature range of -40°C to +85°C, making it suitable for industrial applications. The wide-body SOIC package offers excellent thermal performance and is compatible with standard reflow soldering processes.
Typical applications include industrial fieldbus networks, building automation systems, HVAC controllers, and motor control drives. The ADM2687E is also ideal for solar inverters and power monitoring systems where galvanic isolation is critical for safety and noise immunity.
When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Place decoupling capacitors close to the power pins and follow the recommended layout guidelines in the datasheet to achieve optimal EMC performance.
بدائل مباشرة لـ ADM2687EBRIZ-RL7 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADM2687EBRIZ-RL7 (نفس عامل الشكل والبصمة) — يختلف في Type, Data Rate, Isolation Voltage, ESD Protection, Duplex.
ADM2687EBRIZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADM2682EBRIZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADM2587EBRIZ
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
ADM2483BRWZ
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ADM2483BRWZ-RL7
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←ISO3082DW
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
ADM2687EBRIZ-RL7 المواصفات
| Type | RS-422, RS-485 Digital Isolator |
| Number of Channels | 3 |
| Isolation Voltage | 5000 Vrms |
| معدل البيانات | 500 kbps |
| CMTI | 25 kV/µs |
| ESD Protection | ±15 kV |
| جهد التغذية | 3.3 V or 5 V |
| درجة حرارة التشغيل | -40°C to +85°C |
| العلبة | 16-SOIC (0.295", 7.50mm Width) |
| نوع التركيب | Surface Mount |
| Duplex | Half or Full |
| Standards | ANSI/TIA/EIA-485-A-98, ISO 8482:1987 (E) |
| Integrated DC-DC | Yes (isoPower) |
| حالة RoHS | Compliant |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
تكوين أطراف ADM2687EBRIZ-RL7
| دبوس 1 | VDD1 — Logic side supply voltage (3.3V or 5V) |
| دبوس 2 | GND1 — Logic side ground |
| دبوس 3 | TXD — Transmit data input |
| دبوس 4 | RXD — Receive data output |
| دبوس 5 | DE — Driver enable (active high) |
| دبوس 6 | RE — Receiver enable (active low) |
| دبوس 7 | NC — No connect |
| دبوس 8 | NC — No connect |
| دبوس 9 | A — Non-inverting bus line |
| دبوس 10 | B — Inverting bus line |
| دبوس 11 | GND2 — Isolated side ground |
| دبوس 12 | VDD2 — Isolated side supply voltage (output of isoPower) |
| دبوس 13 | NC — No connect |
| دبوس 14 | NC — No connect |
| دبوس 15 | NC — No connect |
| دبوس 16 | NC — No connect |
التطبيقات النموذجية
ADM2687EBRIZ-RL7 مناسب لـ 6 التطبيقs: Industrial Fieldbus Networks, Building Automation Systems, Motor Control Drives, Solar Inverters, Power Monitoring Systems, HVAC Controllers.
Industrial Fieldbus Networks
The ADM2687EBRIZ-RL7 is ideal for industrial fieldbus networks such as Modbus and Profibus. Its 5 kV isolation and 25 kV/µs CMTI ensure reliable communication in electrically noisy environments. The integrated DC-DC converter simplifies power supply design, and the 500 kbps data rate supports standard fieldbus protocols. The ±15 kV ESD protection on the bus pins enhances robustness against electrostatic discharges common in industrial settings.
موصى به
Building Automation Systems
In building automation, the ADM2687EBRIZ-RL7 provides galvanic isolation for HVAC controllers, lighting systems, and access control networks. Its wide operating temperature range (-40°C to +85°C) suits rooftop and outdoor installations. The integrated isoPower eliminates the need for separate isolated supplies, reducing installation complexity. The device's compliance with RS-485 standards ensures interoperability with existing building management systems.
موصى به
Motor Control Drives
The ADM2687EBRIZ-RL7 is used in motor control drives to isolate the control electronics from the high-voltage power stage. Its 5 kV isolation protects low-voltage logic from transient voltages and ground loops. The high CMTI (25 kV/µs) ensures data integrity during fast switching events. The integrated DC-DC converter provides a clean, isolated supply for the transceiver, reducing noise coupling into the communication lines.
موصى به
Solar Inverters
Solar inverters require robust isolation between the DC input and AC output stages. The ADM2687EBRIZ-RL7 provides 5 kV isolation, ensuring safety and noise immunity in high-voltage environments. Its wide temperature range and high ESD protection make it suitable for outdoor installations. The integrated DC-DC converter simplifies the power architecture, reducing component count and improving reliability.
موصى به
Power Monitoring Systems
In power monitoring systems, the ADM2687EBRIZ-RL7 isolates communication interfaces from high-voltage measurement circuits. Its 5 kV isolation prevents ground loops and protects sensitive monitoring equipment. The 500 kbps data rate is sufficient for transmitting measurement data over long distances. The device's compliance with RS-485 standards ensures compatibility with existing monitoring infrastructure.
موصى به
HVAC Controllers
The ADM2687EBRIZ-RL7 is used in HVAC controllers to provide isolated communication between the main controller and remote sensors or actuators. Its 5 kV isolation protects against voltage surges and ground potential differences. The wide operating temperature range and high ESD protection ensure reliable operation in harsh environments. The integrated DC-DC converter simplifies power supply design, making it easy to integrate into space-constrained controllers.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADM2687EBRIZ-RL7 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADM2687EBRIZ | ADM2682EBRIZ | ADM2587EBRIZ | ADM2483BRWZ | ISO3082DW |
|---|---|---|---|---|---|---|
| Package | 16-SOIC (0.295", 7.50mm Width) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) | 16-SOIC (same) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 500 kbps | 200 kbps |
| Integrated DC-DC | Yes | Yes | Yes | Yes | No | No |
| ESD Protection | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±15 kV | ±16 kV |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage | 3.3V or 5V | 3.3V or 5V | 3.3V or 5V | 3.3V or 5V | 3.3V or 5V | 3.3V or 5V |
أبرز الفروقات
- Integrated 5 kV rms isolation with isoPower DC-DC converter (مقابلADM2483BRWZ)
- Higher data rate and CMTI (مقابلISO3082DW)
- Tape-and-reel packaging for automated assembly (مقابلADM2687EBRIZ)
ملاحظات التصميم
For optimal isolation performance, maintain a minimum creepage distance of 8 mm between the logic side (pins 1-8) and the isolated side (pins 9-16) on the PCB. Use a ground plane on the logic side and a separate ground plane on the isolated side, with a slot cut between them to increase the isolation barrier. Place decoupling capacitors (0.1 µF and 10 µF) close to VDD1 and VDD2 pins.
The integrated isoPower DC-DC converter requires a minimum load to maintain regulation. Ensure the isolated side has a load of at least 10 mA, which is typically provided by the transceiver and bus termination resistors. If the load is too light, the output voltage may rise above the specified range. Add a dummy load resistor if necessary.
To reduce EMI, place a ferrite bead on the VDD1 supply line and use a 0.1 µF capacitor close to the pin. For the isolated side, use a common-mode choke on the A and B bus lines to suppress common-mode noise. Follow the layout guidelines in the ADM2687E datasheet for optimal EMC performance.
معلومات الامتثال
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Halogen-free status not specified in available data.
