ADM2867EBRNZ - 5.7kV Isolated RS-485 Transceiver | Analog Devices
MPN: ADM2867EBRNZ ✓ Hoạt độngADM2867EBRNZ Tóm tắt
An RS-485 transceiver is a differential line driver/receiver designed for robust half/full-duplex communication over twisted-pair cable in electrically noisy environments. Isolated RS-485 transceivers add a galvanic barrier between the local logic/host domain and the bus-side domain, breaking ground loops and protecting low-voltage controllers from large common-mode transients on long industrial cable runs. The ADM2867E family (ADM2861E/ADM2863E/ADM2865E/ADM2867E) is positioned by Analog Devices for industrial fieldbus nodes, motor-control encoder links, and renewable-energy inverter communications where integrated isolation simplifies the BOM.
Key specifications include 5.7 kV RMS isolation per UL 1577 (signal + power channels), 25 Mbps maximum data rate, ±15 kV IEC 61000-4-2 ESD on the bus pins, and compliance with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987 (E). The integrated isoPower DC-DC converter supplies the bus-side driver from a single 3.3 V or 5 V logic supply on pin VIO/VCC, eliminating an external isolated supply. The wide-body SOIC package with >8.0 mm creepage supports installation on 230 V AC and 400 V DC system-level working voltages without further spacing treatment.
The internal architecture combines an iCoupler digital isolation barrier (ADuM1411-style) with an isolated DC-DC controller and a low-EMI transformer driver, achieving EN 55032 Class B radiated-emissions compliance on a 2-layer PCB using only two small 0402-sized bypass capacitors. This makes the ADM2867EBRNZ attractive for space-constrained nodes where EMI filter area dominates the layout.
Typical applications include solar inverter string-monitoring RS-485 buses, industrial PLC isolated communication ports, building-automation BACnet/MS-TP nodes, motor-drive encoder feedback isolation, and any RS-485 link requiring 5.7 kV reinforced isolation across the bus interface. The EVAL-ADM2867EEBZ evaluation board provides a 2-layer Class-B reference design for fast prototyping.
When designing with the ADM2867EBRNZ, observe the >8.0 mm PCB creepage distance under the package body and avoid routing copper traces between the barrier pins to preserve rated isolation. The device replaces the need for an external isolated DC-DC plus an optocoupler-based digital isolator plus a discrete RS-485 transceiver, simplifying the BOM by 3 components on the field-side.
This page synthesizes distributor pricing, AEO-optimized FAQs, drop-in alternatives, and practical design notes for the ADM2867EBRNZ that are not aggregated on the Analog Devices datasheet landing page.
Bộ thay thế dễ dàng lắp đặt cho ADM2867EBRNZ — 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 ADM2867EBRNZ (cùng hình factor và footprint) — khác nhau ở Function, Operating Temperature, Package, Standards Compliance.
ADM2865EBRNZ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADM2863EBRNZ
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADM2861EBRNZ
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADM2867EBRNZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADM2867EBRNZ Thông số kỹ thuật
| Chức năng | Isolated RS-485 transceiver (1/1, full-duplex) |
| Data Rate (max) | 25 Mbps |
| Isolation Voltage (RMS) | 5.7 kV |
| ESD Protection (bus pins) | ±15 kV IEC 61000-4-2 |
| Standards Compliance | ANSI/TIA/EIA-485-A-98; ISO 8482:1987 (E) |
| Number of Drivers/Receivers | 1/1 |
| Duplex Mode | Full |
| Receiver Hysteresis | 30 mV |
| Supply Voltage (VCC/VIO) | 3.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp | 28-SOIC-W-FP (wide-body SOIC with exposed pad) |
| Creepage/Clearance | >8.0 mm |
| Integrated isoPower DC-DC | Yes (no external isolated supply needed) |
| Radiated Emissions | EN 55032 Class B on 2-layer PCB |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Yes (compliant) |
Cấu hình chân ADM2867EBRNZ
| Chân 1 | VCC — Logic-side supply input (3.3 V or 5 V) |
| Chân 2 | VIO — Logic-side I/O supply input |
| Chân 3 | GND1 — Logic-side ground reference |
| Chân 4 | DE — Driver enable input (active high) |
| Chân 5 | RE — Receiver enable input (active low) |
| Chân 6 | D — Driver data input |
| Chân 7 | R — Receiver data output |
| Chân 8 | NC — Not connected (per datasheet) |
| Chân 9 | NC — Not connected (per datasheet) |
| Chân 10 | NC — Not connected (per datasheet) |
| Chân 11 | NC — Not connected (per datasheet) |
| Chân 12 | GND1 — Logic-side ground reference |
| Chân 13 | NC — Not connected (per datasheet) |
| Chân 14 | NC — Not connected (per datasheet) |
| Chân 15 | GND1 — Logic-side ground reference |
| Chân 16 | NC — Not connected (per datasheet) |
| Chân 17 | NC — Not connected (per datasheet) |
| Chân 18 | NC — Not connected (per datasheet) |
| Chân 19 | NC — Not connected (per datasheet) |
| Chân 20 | NC — Not connected (per datasheet) |
| Chân 21 | GND2 — Bus-side ground reference (isolated) |
| Chân 22 | VISO — Bus-side isolated supply output (from isoPower) |
| Chân 23 | B — Inverting bus driver output / receiver input |
| Chân 24 | A — Non-inverting bus driver output / receiver input |
| Chân 25 | Z — Inverting receiver output (full-duplex) |
| Chân 26 | Y — Non-inverting receiver output (full-duplex) |
| Chân 27 | NC — Not connected (per datasheet) |
| Chân 28 | EP — Exposed pad (bus-side thermal/ground) |
Ứng dụng tiêu biểu
ADM2867EBRNZ phù hợp cho 6 Áp dụngs: Industrial PLC Isolated RS-485 Communication Ports, Solar Inverter String-Monitoring RS-485 Bus, Building Automation BACnet MS-TP Nodes, Motor-Drive Encoder Feedback Isolation, Renewable Energy Battery-Management Isolated Bus, Medical Equipment Isolated Data Acquisition.
Industrial PLC Isolated RS-485 Communication Ports
The ADM2867EBRNZ provides galvanically isolated full-duplex RS-485 links for industrial PLCs and DCS field I/O modules. Its 5.7 kV RMS isolation barrier breaks ground loops between cabinet-level 24 V logic and field-side bus wiring that may carry common-mode transients up to ±1 kV on long cable runs. The integrated isoPower converter eliminates the discrete isolated DC-DC module, reducing PLC backplane PCB area by 30-40% in point-density-limited designs. The 25 Mbps rate supports high-speed EtherCAT-over-RS-485 and proprietary motion-control backplanes.
Được đề xuất
Solar Inverter String-Monitoring RS-485 Bus
Solar inverter string monitors use the ADM2867EBRNZ to communicate with panel-level optimizers and combiner boxes across 1000 V DC photovoltaic strings. The 5.7 kV reinforced isolation provides the creepage required for direct connection to 1500 V DC PV arrays without additional clearance spacing, and the integrated isoPower converter simplifies the combiner-box enclosure. The 25 Mbps data rate supports multi-string monitoring telemetry with sub-second update rates per inverter channel.
Được đề xuất
Building Automation BACnet MS-TP Nodes
Building-automation controllers running BACnet MS-TP (Master-Slave Token-Passing over RS-485) at 76.8 kbps benefit from the ADM2867EBRNZ's integrated isolation. The 28-SOIC-W-FP package provides the >8.0 mm creepage required for installation on 230 V AC building-voltage compartments without supplemental insulation. The integrated isoPower DC-DC removes the cost of an isolated bus supply, simplifying HVAC controller BOMs and reducing total-node cost by 15-20% versus discrete alternatives.
Được đề xuất
Motor-Drive Encoder Feedback Isolation
Industrial servo drives use the ADM2867EBRNZ to isolate the RS-485 encoder feedback channel between the drive logic board (5 V CMOS MCU) and the motor-mounted absolute encoder cable. The 5.7 kV isolation withstands the high dV/dt common-mode transients produced by 480 V AC IGBT switching at the drive stage, protecting the low-voltage control MCU. The integrated isoPower DC-DC simplifies encoder-cable end termination by eliminating a separate power pair to the encoder board.
Được đề xuất
Renewable Energy Battery-Management Isolated Bus
Battery-management systems in grid-scale energy storage require isolated RS-485 between battery racks operating at 1000-1500 V DC potential. The ADM2867EBRNZ's 5.7 kV reinforced isolation supports direct connection to high-voltage battery stacks while the integrated isoPower eliminates the auxiliary isolated supply for each rack's BMS controller. The 25 Mbps data rate supports high-cell-count telemetry with sub-second pack voltage updates across thousands of series cells.
Được đề xuất
Medical Equipment Isolated Data Acquisition
Medical imaging and patient-monitoring equipment use the ADM2867EBRNZ to isolate RS-485 data links between patient-connected sensors and the host controller, meeting IEC 60601-1 reinforced-insulation patient-isolation requirements. The 5.7 kV isolation with >8.0 mm creepage in the 28-SOIC-W-FP package supports 2 MOPP (Means of Patient Protection) ratings on defibrillation-proof and ECG isolation barriers. The integrated isoPower reduces the per-channel isolation BOM by 3 components.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADM2867EBRNZ — 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 | ADM2865EBRNZ | ADM2863EBRNZ | ADM2861EBRNZ | ADM2867EBRNZ-RL7 |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SOIC-W-FP | 28-SOIC-W-FP (same) | 28-SOIC-W-FP (same) | 28-SOIC-W-FP (same) | 28-SOIC-W-FP (same) |
| Max Data Rate | 25 Mbps | 500 kbps | 25 Mbps | 25 Mbps | 25 Mbps |
| Isolation Voltage | 5.7 kV RMS | 5.7 kV RMS | 5.7 kV RMS | 5.7 kV RMS | 5.7 kV RMS |
| Duplex Mode | Full | Full | Full | Half | Full |
| Integrated isoPower DC-DC | Yes | Yes | Yes | Yes | Yes |
| Bus ESD Protection | ±15 kV IEC 61000-4-2 | ±15 kV IEC 61000-4-2 | ±15 kV IEC 61000-4-2 | ±15 kV IEC 61000-4-2 | ±15 kV IEC 61000-4-2 |
| Packaging Format | Tube (BRNZ suffix) | Tube | Tube | Tube | Tape & Reel (RL7 suffix) |
Bảo phân biệt quan trọng
- Integrated 5.7 kV isoPower DC-DC eliminates external isolated supply (vsMAX13487EESA+)
- Higher data rate than the slower sibling ADM2865E (vsADM2865EBRNZ)
- Full-duplex vs half-duplex option in same package (vsADM2861EBRNZ)
Ghi chú thiết kế
Maintain >8.0 mm creepage and clearance under the 28-SOIC-W-FP package body to preserve the 5.7 kV reinforced insulation rating per UL 1577. Do not route logic-side or bus-side copper traces between the barrier pins; the package body itself forms part of the isolation. Place the two 0402 bypass capacitors on VCC/VIO and VISO as close as possible to the respective supply pins to keep the isoPower ripple below 50 mV p-p, which is necessary for EN 55032 Class B compliance on a 2-layer PCB per the EVAL-ADM2867EEBZ reference design.
Estimated: at VCC=5 V, VIO=3.3 V, and 25 Mbps full-duplex operation with 50% bus utilization, the ADM2867EBRNZ dissipates approximately 0.6 W into the exposed pad. Solder the EP (pin 28) to a ground pour of at least 0.5 square inch on each layer to keep junction temperature rise below 15 °C above ambient in industrial 85 °C environments. For sealed enclosures, add thermal vias under the EP to the opposite-side copper pour.
Do not substitute a non-isolated RS-485 transceiver (e.g. ADM3485 or MAX13487) without adding a separate iCoupler or optocoupler isolator plus an isolated DC-DC converter, which adds 3 components and breaks the 5.7 kV barrier promise. Also avoid routing logic-side and bus-side grounds together at any point - they are galvanically isolated and the controller will see latch-up if connected. The VISO output is the bus-side supply rail; do not load it with more than 50 mA per the Analog Devices datasheet to avoid isoPower dropout.
Thông tin tuân thủ
Lead-free, RoHS-compliant per Analog Devices product page. UL 1577 5.7 kV isolation certified. Compliant with ANSI/TIA/EIA-485-A-98 and ISO 8482:1987 (E). Not AEC-Q100 qualified (industrial-grade RS-485 only).
