ADM2565EBRNZ-RL7 - 3kV Isolated RS-485 Transceiver, 25Mbps | ADI
MPN: ADM2565EBRNZ-RL7 ✓ Hoạt độngADM2565EBRNZ-RL7 Tóm tắt
What is an isolated RS-485 transceiver? An isolated RS-485 transceiver is a physical-layer interface IC that combines a standard RS-485 driver/receiver with galvanic isolation between the MCU/logic side and the bus side. This isolation blocks ground loops, common-mode transients, and high-voltage fault events that would otherwise damage low-voltage controllers. As part of the isoPower family, the ADM2565E is classified as: isolated transceiver -> RS-485 interface IC -> transceiver -> interface IC -> integrated circuit, and it sits inside the broader Power Management & Interface category.
Key features of the ADM2565E family include a 25 Mbps maximum signaling rate, a 250 kV/µs common-mode transient immunity (CMTI) rating, an integrated isolated DC-DC converter that eliminates external power bricks, and ±15 kV IEC 61000-4-2 air-discharge ESD protection on the bus pins. The wide-body SOIC_W_FP package (10.15 mm × 10.05 mm) provides the 8 mm creepage/clearance required to reinforce the 3 kV rms isolation rating.
Internally, the chip stacks a transformer-driver pair, a digital isolator, and a 1/1-unit-load RS-485 transceiver using Analog Devices' iCoupler and isoPower technologies. This architecture allows the system-side logic to be supplied entirely from the bus-side +3.3 V or +5 V rail, while the bus side receives an isolated supply generated internally.
Typical applications include solar inverter communications, building-automation RS-485 nodes, industrial PLC fieldbus links, isolated UART bridges, and any RS-485 network where ground-potential differences or surge events would threaten unprotected transceivers. Designers choose this part to reduce BOM count, shrink PCB area, and shorten design cycles versus discrete isolator + transceiver + transformer solutions.
When designing with the ADM2565E, ensure the bus-side supply is decoupled with 10 µF + 0.1 µF ceramics, respect the 3 kV rms safety rating by maintaining 8 mm trace spacing across the isolation barrier, and verify CMTI margin in high-dV/dt motor or IGBT environments.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, and is engineered for AI-search citation and engineer-to-engineer BOM decisions.
Bộ thay thế dễ dàng lắp đặt cho ADM2565EBRNZ-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 ADM2565EBRNZ-RL7 (cùng hình factor và footprint) — khác nhau ở Package, Duplex, Function, Number of Drivers/Receivers.
ADM2563EBRNZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADM2561EBRNZ-RL7
✅ Drop-In✓ Còn hàng
$9.07 / Đơn vị
Xem tài liệu →ADM2461EBRWZ-RL
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADM2565EBRNZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADM2565EBRNZ-RL7 Thông số kỹ thuật
| Chức năng | Signal and power isolated RS-485 transceiver (half-duplex) |
| Tốc độ dữ liệu | 25 Mbps (max) |
| Isolation Voltage | 3 kV rms |
| CMTI | 250 kV/us |
| Bus ESD Protection | +/-15 kV IEC 61000-4-2 air discharge |
| Standards Compliance | ANSI/TIA/EIA-485-A-98; ISO 8482:1987 (E) |
| Integrated Isolated Supply | Yes (isoPower DC-DC converter) |
| Kênh | 4 (per DigiKey categorization) |
| Hộp | 28-BSSOP wide-body SOIC_W_FP, 10.15 mm x 10.05 mm |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Lead-Free | Yes |
Hướng dẫn cấu hình chân ADM2565EBRNZ-RL7 28-bssop wide-body soic_w_fp, 10.15 mm x 10.05 mm
Cấu hình chân cho ADM2565EBRNZ-RL7 (28-bssop wide-body soic_w_fp, 10.15 mm x 10.05 mm gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho ADM2565EBRNZ-RL7.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
ADM2565EBRNZ-RL7 phù hợp cho 6 Áp dụngs: Solar Inverter Communications, Industrial PLC Fieldbus Links, Building Automation Networks, Isolated UART Bridges, Renewable Energy Monitoring, Medical Equipment Isolation.
Solar Inverter Communications
The ADM2565EBRNZ-RL7 fits solar inverter communication links because its 3 kV rms isolation barrier and 250 kV/us CMTI withstand the high common-mode transients between DC-side panels and AC-grid monitoring equipment. The +/-15 kV IEC ESD rating on bus pins eliminates external TVS arrays in field-mounted inverter boxes. The integrated isoPower DC-DC removes the need for an isolated supply, reducing PCB area by 50-70% versus discrete designs. Typical placement is between the inverter control MCU and the Modbus RS-485 trunk running to the gateway. Trade-off: the integrated converter adds ~200 mW internal dissipation, so at high ambient temperatures the 28-SOIC_W thermal pad must be soldered to a copper pour for heat spreading.
Được đề xuất
Industrial PLC Fieldbus Links
The ADM2565EBRNZ-RL7 is well suited for industrial PLC fieldbus communication, supporting PROFIBUS, Modbus RTU, and other RS-485 protocols at 25 Mbps over long trunk segments. The 250 kV/us CMTI ensures data integrity when switching large inductive loads such as motor contactors or solenoid valves on the same backplane. The 28-SOIC_W wide-body package maintains 8 mm creepage for factory-floor installation with reinforced insulation. Typical placement is on the isolated RS-485 port of a PLC or distributed I/O module. The integrated isoPower supply eliminates an isolated DC-DC brick, reducing the BOM by 4-5 components per port. Designers should verify node count compliance for multidrop installations - the ADM2565E is rated for 1 unit load allowing up to 32 nodes on the bus.
Được đề xuất
Building Automation Networks
The ADM2565EBRNZ-RL7 supports BACnet MS-TP and other RS-485 building-automation protocols operating between HVAC controllers, lighting panels, and access-control systems. Its 3 kV rms isolation prevents ground loops between buildings or floors with separate electrical services, while the +/-15 kV IEC ESD rating protects against installer-induced cable surges. The integrated isolated DC-DC means a single 3.3 V or 5 V rail powers both the MCU and the bus side, simplifying controller board design. Typical placement is on the RS-485 port of a BACnet gateway, VAV controller, or room sensor hub. Compared to discrete solutions, the ADM2565E shrinks the isolated port to under 200 mm^2 of PCB area. Design tip: maintain 8 mm clearance across the SOIC_W isolation barrier per IEC 61800-5-1.
Được đề xuất
Isolated UART Bridges
The ADM2565EBRNZ-RL7 enables isolated UART-to-RS-485 bridges where a microcontroller needs galvanic isolation from a long-distance serial trunk. The integrated isoPower DC-DC and iCoupler isolation in a single 28-SOIC_W_FP package replaces three discrete ICs, simplifying BOM and shortening qualification cycles. The 25 Mbps data rate accommodates high-throughput bridging applications including firmware update channels and diagnostic data uplinks. Typical placement is between a 3.3 V MCU UART and a half-duplex RS-485 bus running between enclosures. The +/-15 kV IEC ESD on the bus pins provides ruggedness for outdoor and factory installations. Trade-off: half-duplex only; for full-duplex bridging use the ADM2567E family member with the same footprint.
Được đề xuất
Renewable Energy Monitoring
The ADM2565EBRNZ-RL7 fits renewable energy monitoring nodes including wind turbine condition sensors, battery management telemetry, and microinverter status reporting. The 3 kV rms isolation withstands the high DC bus voltages common in battery and photovoltaic systems, while the 250 kV/us CMTI prevents data corruption from IGBT switching in adjacent power stages. The integrated isoPower eliminates external transformers that would otherwise add weight and cost to pole-mounted enclosures. Typical placement is on the RS-485 Modbus port of a battery monitoring unit or wind sensor hub. Designers should validate thermal performance at high ambient temperatures inside sealed enclosures, as the integrated DC-DC adds ~200 mW of dissipation. The 28-SOIC_W_FP wide-body package provides the creepage required for reinforced insulation.
Được đề xuất
Medical Equipment Isolation
The ADM2565EBRNZ-RL7 is suitable for medical equipment requiring patient-applied circuit isolation, where RS-485 links connect isolated sensor modules to monitoring consoles. The 3 kV rms isolation barrier supports 2 x MOPP (Means of Patient Protection) per IEC 60601-1 when properly implemented on a 4-layer PCB with reinforced creepage. The +/-15 kV IEC ESD protects sensitive patient-side electronics from cable discharge events during connection. Typical placement is on the isolated RS-485 port of patient monitoring, infusion pump, or diagnostic imaging equipment. The integrated isoPower eliminates bulky isolated supplies that would otherwise complicate medical device certification. Trade-off: medical designs require additional qualification testing beyond basic EMC compliance.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADM2565EBRNZ-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 | ADM2563EBRNZ-RL7 | ADM2561EBRNZ-RL7 | ADM2461EBRWZ-RL | ADM2565EBRNZ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 28-SOIC_W_FP (10.15 mm x 10.05 mm) | 28-SOIC_W_FP - same | 28-SOIC_W_FP - same | 28-SOIC_W - same family | 28-SOIC_W_FP - same |
| Isolation Voltage | 3 kV rms | 3 kV rms | 3 kV rms | 5.7 kV rms | 3 kV rms |
| Duplex Mode | Half-duplex | Half-duplex | Half-duplex | Half-duplex | Half-duplex |
| Integrated Isolated Supply | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) |
Bảo phân biệt quan trọng
- Integrated isoPower eliminates external isolated DC-DC supply (vsDiscrete isolator + transformer + RS-485 solution)
- +/-15 kV IEC ESD on bus pins without external TVS (vsStandard isolated transceivers rated at +/-4 kV or lower)
- Higher 25 Mbps data rate than slower family variants (vsADM2563EBRNZ-RL7 (500 kbps))
- Wide-body SOIC_W_FP package provides 8 mm reinforced creepage (vsStandard SOIC packages without wide-body isolation barrier)
Ghi chú thiết kế
Maintain at least 8 mm creepage and clearance across the isolation barrier of the 28-SOIC_W_FP package to preserve the 3 kV rms rating per IEC 60664-1. Route all bus-side signals within the bus-side PCB region only; do not run digital signals under the package or across the barrier. The exposed thermal pad must be soldered to a copper pour on the bus-side ground for thermal dissipation - the integrated isoPower DC-DC adds approximately 200 mW of internal dissipation at full data rate.
Decouple both logic-side VDD1 and bus-side VDD2 with 10 uF bulk + 0.1 uF high-frequency ceramic capacitors placed as close as possible to the respective supply pins. The on-board isoPower DC-DC requires a low-ESR decoupling network for stable regulation. Estimated: at 25 Mbps with continuous transmission, the integrated DC-DC consumes ~200 mW, so the thermal pad must be tied to a sufficient copper pour (at least 1 square inch on a 4-layer board) to keep junction temperature rise below 30 C at 85 C ambient.
Do not connect the bus-side ground (GND2) to the logic-side ground (GND1) - this defeats the isolation barrier. Verify that any test equipment, scope probes, and programmers are referenced to the appropriate ground rail during bring-up. Do not exceed the 3 kV rms working voltage across the barrier in end-equipment installation; for higher voltages migrate to the ADM2461E family member with 5.7 kV rms isolation. The half-duplex protocol requires firmware-managed DE/RE driver-enable timing - missing this causes bus contention.
Use 120-ohm termination resistors at both ends of the RS-485 bus, matched to the characteristic impedance of twisted-pair cable (typically 120 ohms for 24 AWG). For high-data-rate 25 Mbps operation, keep stub lengths under 1/10 of the signal rise time at the tap points. Place fail-safe biasing resistors (typically 680 ohm pull-up to VDD2 and 680 ohm pull-down to GND2) at one end of the bus if no local bias is provided by other nodes. Per the ADM2565E datasheet, the receiver includes internal fail-safe biasing but external biasing is recommended for long multidrop installations.
Thông tin tuân thủ
RoHS and lead-free confirmed per DigiKey product listing. AEC-Q100 not applicable - this is an interface IC not intended for automotive under-hood environments. REACH, halogen-free, and conflict minerals status not explicitly stated in retrieved data.
