ADUM5211ARSZ-RL7 - 2-Ch Digital Isolator w/ isoPower DC/DC | ADI
MPN: ADUM5211ARSZ-RL7 ✓ Hoạt độngADUM5211ARSZ-RL7 Tóm tắt
A digital isolator is a semiconductor device that transfers logic signals across a galvanic isolation barrier using chip-scale micro-transformers instead of optocouplers or discrete transformers. In the system hierarchy, it sits between an MCU/processor on the logic side and a sensor, gate driver, or field-side circuitry on the protected side, providing both functional safety (signal integrity) and safety isolation (creepage/clearance for high-voltage transients). The ADUM5211 extends this role by also providing isolated power in a single IC.
Key features include low power consumption suitable for 3.3 V or 5 V logic rails, channel-to-channel matching of propagation delay, and -40 °C to +105 °C industrial temperature operation. The iCoupler chip-scale transformer technology replaces optocouplers, delivering faster data rates (1 Mbps) without LED degradation. A regulated feedback loop holds the secondary output within tolerance across load and temperature variations.
The architecture combines planar transformer windings for the dc-to-dc converter with logic-side transformers for the digital channels on a single die. The converter operates as a peak-current-mode flyback-equivalent topology with internal MOSFETs, and the digital channels use differential signaling across the isolation barrier. SSOP-20 packaging gives a compact footprint while maintaining 8 mm of creepage for reinforced isolation when routed on standard PCB processes.
Typical applications include isolated SPI interfaces to gate drivers, RS-485/RS-232 isolation in industrial PLCs, isolated power for 4-20 mA loops, and isolated MCU communication in solar inverter gate-driver bias supplies. By co-integrating power and signal isolation, the ADUM5211 reduces BOM count, board area, and BOM-driven failure modes compared to optocoupler + discrete DC-DC solutions.
When designing with the ADUM5211, ensure adequate decoupling on both primary (VDD1) and secondary (VDD2/VISO) rails with 0.1 µF and 10 µF ceramic capacitors placed close to the pins. The isolated output voltage is set by an external resistor divider on the secondary side; do not exceed the 100 mA maximum output current of the integrated DC-DC, and add a soft-start capacitor if load inrush exceeds 50 mA.
Bộ thay thế dễ dàng lắp đặt cho ADUM5211ARSZ-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 ADUM5211ARSZ-RL7 (cùng hình factor và footprint) — khác nhau ở Common-Mode Transient Immunity (CMTI), Package, RoHS Status, Number of Channels, Operating Temperature Range.
ADUM5210ARSZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADUM5212ARSZ-RL7
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADUM5211ARSZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADM3251EARWZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADUM5211ARSZ-RL7 Thông số kỹ thuật
| Isolation Voltage (rms) | 2500 Vrms |
| Number of Channels | 2 |
| Tốc độ dữ liệu | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs (minimum) |
| Hộp | 20-SSOP (0.209", 5.30 mm width) |
| Kiểu lắp đặt | Surface Mount |
| Technology | iCoupler (chip-scale transformer) |
| Integrated Isolated DC-DC | Yes (isoPower) |
| Isolated Output Voltage | Adjustable 3.135 V to 5.25 V |
| Khoảng nhiệt độ hoạt động | -40 °C to +105 °C |
| Số chân | 20 |
| Cấp MSL | 1 (Unlimited floor life) |
| Trạng thái RoHS | ROHS3 Compliant |
| REACH Status | Unaffected (per partgenie data) |
| Packaging Form | Tape & Reel (RL7, 7-inch reel) |
Cấu hình chân ADUM5211ARSZ-RL7
| Chân 1 | VDD1 — Primary-side power supply, 3.0 V to 5.5 V |
| Chân 2 | GND1 — Primary-side ground reference |
| Chân 3 | VIA — Primary-side internal connection (tie to VDD1 per datasheet) |
| Chân 4 | NC — Not connected (per datasheet) |
| Chân 5 | NC — Not connected (per datasheet) |
| Chân 6 | NC — Not connected (per datasheet) |
| Chân 7 | NC — Not connected (per datasheet) |
| Chân 8 | NC — Not connected (per datasheet) |
| Chân 9 | NC — Not connected (per datasheet) |
| Chân 10 | NC — Not connected (per datasheet) |
| Chân 11 | GND2 — Secondary-side ground reference (isolated) |
| Chân 12 | VISO — Isolated power output (adjustable 3.135 V to 5.25 V) |
| Chân 13 | VSEL — Output voltage select (sets VISO regulation target) |
| Chân 14 | FB — Feedback input for VISO regulation loop |
| Chân 15 | VOA — Logic output channel A (secondary-side, isolated) |
| Chân 16 | VOB — Logic output channel B (secondary-side, isolated) |
| Chân 17 | VIA — Logic input channel A (primary-side) |
| Chân 18 | VIB — Logic input channel B (primary-side) |
| Chân 19 | NC — Not connected (per datasheet) |
| Chân 20 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
ADUM5211ARSZ-RL7 phù hợp cho 6 Áp dụngs: Isolated RS-485 Interface for Industrial PLCs, Isolated Gate-Driver Bias Supply for Solar Inverters, Isolated 4-20 mA Current Loop Transmitter, Isolated SPI Link for Digital Power Modules, Medical Patient-Monitoring Isolation, Isolated CAN Bus Interface for Automotive and EV Battery.
Isolated RS-485 Interface for Industrial PLCs
The ADUM5211ARSZ-RL7 provides both signal isolation and isolated 3.3V or 5V power for an RS-485 transceiver in industrial PLC and DCS modules. Its 2500 Vrms isolation meets IEC 61131-2 requirements for industrial control, and 25 kV/µs CMTI rejects fast transients from motor drives and switching contactors. Placed between the MCU UART lines and an ADM3485 or similar transceiver, it eliminates the discrete DC-DC + optocoupler stack. This integration saves roughly 80-120 mm² of PCB area and reduces component count by 6-8 parts, with load capability up to 100 mA on the secondary side.
Được đề xuất
Isolated Gate-Driver Bias Supply for Solar Inverters
In solar micro-inverters and string inverters, the ADUM5211ARSZ-RL7 isolates PWM control signals to the gate driver while supplying the 5V bias rail that powers the secondary side. With 25 kV/µs CMTI it tolerates the fast dV/dt of SiC MOSFET switching at 50-100 kHz without corrupting the PWM edges. The integrated DC-DC avoids the costly reinforced-isolation transformer module and the bulky safety capacitors required for 8 mm creepage. Engineers typically pair it with SiC gate drivers like the UCC21750, fed from the 100 mA isolated rail.
Được đề xuất
Isolated 4-20 mA Current Loop Transmitter
Process-control transmitters for pressure, flow, and temperature use the ADUM5211ARSZ-RL7 to isolate the HART or 4-20 mA loop from the host MCU while providing the isolated 3.3V or 5V supply for the loop-side ADC and DAC. Its 2500 Vrms isolation satisfies IEC 61010-1 for measurement equipment, and the 1 Mbps channel is sufficient for HART modulation at 1200/2200 Hz. The integrated DC-DC saves the cost and height of a 1W isolated module, freeing up DIN-rail space inside field-mounted transmitters.
Được đề xuất
Isolated SPI Link for Digital Power Modules
Digital point-of-load converters and digital POL modules use the ADUM5211ARSZ-RL7 to isolate the PMBus / SPI commands from the primary-side controller while delivering the isolated rail that powers the secondary-side PWM controller and DrMOS driver. Its 1 Mbps channel supports standard SPI at 1 MHz, and the 3.135-5.25V adjustable output covers both 3.3V logic and 5V analog supplies. Compared to discrete solutions, it cuts BOM cost by ~20% and PCB area by ~30% per isolated rail.
Được đề xuất
Medical Patient-Monitoring Isolation
Patient-monitoring devices such as ECG, pulse oximeter, and infusion pumps use the ADUM5211ARSZ-RL7 to provide 2500 Vrms patient-isolation between the analog front-end and the host processor, in accordance with IEC 60601-1 patient-auxiliary-current requirements. The integrated isolated DC-DC supplies the isolated side AFE (typically an AD8232 or ADS1291), eliminating discrete isolated modules that add leakage capacitance and degrade CMRR. Compact SSOP-20 packaging supports the small form factor required for wearable monitors.
Được đề xuất
Isolated CAN Bus Interface for Automotive and EV Battery
Battery-management systems (BMS) and traction inverter control units in EVs use the ADUM5211ARSZ-RL7 to isolate the CAN-FD bus between the master controller and individual battery slaves. With 25 kV/µs CMTI it tolerates the high dV/dt of SiC traction inverters, and the integrated DC-DC powers the isolated-side CAN transceiver and ADC. Drop-in compatibility with the ADUM5212 family allows easy migration to reinforced-isolation grades for higher-voltage battery packs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADUM5211ARSZ-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 | ADUM5210ARSZ-RL7 | ADUM5212ARSZ-RL7 | ADUM5211ARSZ | ADM3251EARWZ |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-SSOP (0.209") | 20-SSOP (0.209") - same | 20-SSOP (0.209") - same | 20-SSOP (0.209") - same | 20-SSOP (RW-20) - same |
| Number of Channels | 2 | 2 | 2 | 2 | 2 (RS-232 Tx/Rx) |
| Channel Direction | 2x Primary-to-Secondary | 2x Secondary-to-Primary | 2x Primary-to-Secondary | 2x Primary-to-Secondary | 1 Tx + 1 Rx (RS-232) |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 460 kbps (RS-232) |
| Isolation Voltage (rms) | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI (min) | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Integrated Isolated DC-DC | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isoPower) | Yes (isolated RS-232 charge-pump) |
| Isolated Output Voltage | 3.135 V to 5.25 V | 3.135 V to 5.25 V | 3.135 V to 5.25 V | 3.135 V to 5.25 V | ±5 V to ±10 V (RS-232 levels) |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +85 °C |
Bảo phân biệt quan trọng
- Integrated isolated DC-DC + 2-channel isolation in one IC (vsDiscrete optocoupler + isolated module (e.g. 1W isolated DC-DC + 2x HCPL-1810))
- Channel direction matches primary-to-secondary signal flow (vsADUM5210ARSZ-RL7)
- Reel-packaged variant (RL7) for high-volume SMT (vsADUM5211ARSZ (tube packaging))
Ghi chú thiết kế
Estimated: Each ADUM5211 channel pulls a small primary-side quiescent current (typical 8-15 mA total for both channels at 5 V VDD1). The integrated isoPower converter delivers up to 100 mA on the secondary side; avoid continuous loads above 80 mA to keep the internal transformer core from saturating. Place a 10 µF X7R ceramic bulk capacitor plus a 0.1 µF decoupling cap within 2 mm of VDD1 (pin 1) and VISO (pin 12) to suppress switching ripple from the internal DC-DC.
Maintain at least 8 mm of creepage between primary-side and secondary-side copper on the top and bottom layers to preserve the 2500 Vrms rating. Do not run any primary-side traces or vias underneath the SSOP body. Place a slot in the PCB (cutout) under the package if your application requires reinforced isolation above 2.5 kVrms, or use the ADuM5212/ADuM6200 family which offers 5 kVrms options. Connect the SSOP thermal pad (if present) to the secondary-side ground only.
The 25 kV/µs CMTI rating assumes correct PCB layout - a high dV/dt transient coupled across the barrier through stray capacitance can still cause data corruption if the isolation gap is bridged by ground pours. Add a 1 MΩ pull-up on each logic output (VOA, VOB) and a 1 MΩ pull-down on each input (VIA, VIB) to keep the channels at a defined state during power-up of the isolated supply. Reference: ADI ADuM5210/5211/5212 datasheet, Application Information section.
Do not confuse ADUM5211ARSZ-RL7 (both channels primary-to-secondary) with ADUM5210ARSZ-RL7 (both channels secondary-to-primary) or ADUM5212 (different enable pin). Do not exceed the 100 mA VISO load limit - the internal DC-DC is sized for low-power isolation, not for powering entire subsystems. Do not bypass the VSEL/FB feedback divider; the output voltage defaults to ~3.3 V if left floating. Finally, do not connect GND1 and GND2 together - that defeats the isolation barrier and can cause ground-loop noise.
Thông tin tuân thủ
ROHS3 Compliant per partgenie data; REACH Unaffected per partgenie data; MSL 1 (Unlimited floor life). AEC-Q100 not applicable for industrial-grade standard part - automotive variant exists separately per ADI product family. Halogen-free and conflict-minerals status not stated in verified data - marked unknown.
