ADUM2251ARWZ-RL7 - Hot-Swappable I2C Isolator 5kV | Analog Devices
MPN: ADUM2251ARWZ-RL7 ✓ Hoạt độngADUM2251ARWZ-RL7 Tóm tắt
Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect circuits from high voltages, ground loops, and noise. They are essential in industrial, medical, and communication systems where safety and signal integrity are critical. The ADuM2251 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to achieve isolation, offering advantages over optocouplers such as higher speed, lower power, and better reliability.
Key features include hot swap circuitry to prevent data glitches when an unpowered card is inserted onto an active bus, non-latching bidirectional channels, and compatibility with I2C interfaces. The device operates over a wide supply voltage range and temperature range of -40°C to +105°C. It is RoHS compliant and supports 5kVrms isolation, making it suitable for harsh industrial environments.
Technically, the ADuM2251 integrates the isolation barrier and I2C buffer functions in a single package, eliminating the need for external components. The hot swap feature ensures that the bus is not disturbed during card insertion, which is critical in hot-swappable systems. The device also includes power-on reset and bus release functions to ensure reliable startup.
Typical applications include isolated I2C buses in industrial automation, medical equipment, and communication systems. It is also used in power supply monitoring, battery management, and any system requiring galvanic isolation for I2C signals. The wide temperature range and high CMTI make it suitable for motor drives and other noisy environments.
When designing with the ADuM2251, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Place decoupling capacitors close to the VDD pins and follow the recommended application circuit in the datasheet to achieve optimal performance.
Bộ thay thế dễ dàng lắp đặt cho ADUM2251ARWZ-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 ADUM2251ARWZ-RL7 (cùng hình factor và footprint) — khác nhau ở Number of Channels, Package, Common-Mode Transient Immunity (CMTI), Operating Temperature Range.
ADUM2251ARWZ
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ADUM2251WARWZ
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ADUM2251ARWZ-RL7 Thông số kỹ thuật
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 (1 bidirectional, 1 unidirectional) |
| Tốc độ dữ liệu | 1 Mbps |
| CMTI | 25 kV/µs |
| Loại giao diện | I2C |
| Điện áp cung cấp | 3.0 V to 5.5 V |
| Nhiệt độ hoạt động | -40°C to +105°C |
| Hộp | 16-SOIC (0.295", 7.50mm Width) |
| Kiểu lắp đặt | Surface Mount |
| Hot Swap | Yes |
| Non-Latching | Yes |
| RoHS | Compliant |
| Technology | iCoupler |
Cấu hình chân ADUM2251ARWZ-RL7
| Chân 1 | VDD1 — Primary supply voltage |
| Chân 2 | GND1 — Primary ground |
| Chân 3 | SDA1 — Bidirectional data line (side 1) |
| Chân 4 | SCL1 — Bidirectional clock line (side 1) |
| Chân 5 | NC — No connect |
| Chân 6 | NC — No connect |
| Chân 7 | NC — No connect |
| Chân 8 | NC — No connect |
| Chân 9 | NC — No connect |
| Chân 10 | NC — No connect |
| Chân 11 | NC — No connect |
| Chân 12 | NC — No connect |
| Chân 13 | SCL2 — Unidirectional clock line (side 2) |
| Chân 14 | SDA2 — Bidirectional data line (side 2) |
| Chân 15 | GND2 — Secondary ground |
| Chân 16 | VDD2 — Secondary supply voltage |
Ứng dụng tiêu biểu
ADUM2251ARWZ-RL7 phù hợp cho 6 Áp dụngs: Industrial Automation, Medical Equipment, Communication Systems, Power Management, Automotive Electronics, IoT and Smart Home.
Industrial Automation
The ADUM2251ARWZ-RL7 provides 5kV isolation for I2C buses in industrial control systems, protecting against ground loops and high-voltage transients. Its 25kV/µs CMTI ensures reliable communication in noisy factory environments. The hot-swap feature allows safe board insertion in live systems, reducing downtime. With a 1Mbps data rate, it supports fast I2C communication for sensors and actuators. The wide temperature range (-40°C to +105°C) suits harsh industrial conditions.
Được đề xuất
Medical Equipment
In medical devices, patient safety requires galvanic isolation. The ADUM2251ARWZ-RL7 provides 5kV isolation for I2C communication between control and sensor modules, preventing leakage currents. Its low power consumption and small SOIC-16 package fit compact designs. The non-latching channels ensure reliable data transfer in critical monitoring systems. The device meets medical safety standards with its high isolation rating, making it suitable for patient monitoring and diagnostic equipment.
Được đề xuất
Communication Systems
The ADUM2251ARWZ-RL7 isolates I2C buses in telecom and networking equipment, preventing ground loops and noise interference. Its 1Mbps data rate supports control-plane communication in routers and switches. The high CMTI (25kV/µs) ensures signal integrity in high-EMI environments. The hot-swap feature enables line-card replacement without system shutdown, improving serviceability. The device's 5kV isolation protects against lightning surges and voltage spikes.
Được đề xuất
Power Management
In power supply systems, the ADUM2251ARWZ-RL7 isolates I2C communication between the controller and power modules, preventing ground loops and high-voltage transients from damaging control circuitry. Its 5kV isolation is suitable for monitoring high-voltage rails. The hot-swap feature allows safe replacement of power modules in live systems. The device's wide supply voltage range (3.0V to 5.5V) interfaces with various microcontrollers. The 1Mbps data rate supports real-time monitoring and control.
Được đề xuất
Automotive Electronics
The ADUM2251ARWZ-RL7 provides isolation for I2C buses in automotive systems, such as battery management and infotainment, protecting against voltage spikes and ground shifts. Its -40°C to +105°C temperature range meets automotive requirements. The 5kV isolation ensures safety in high-voltage EV systems. The high CMTI (25kV/µs) ensures reliable communication in the presence of motor noise. The hot-swap feature supports modular designs for easy maintenance.
Được đề xuất
IoT and Smart Home
In IoT devices, the ADUM2251ARWZ-RL7 isolates I2C sensors and actuators from the main controller, preventing ground loops and noise. Its low power consumption is ideal for battery-powered devices. The small SOIC-16 package fits space-constrained designs. The 1Mbps data rate supports sensor data collection and control. The hot-swap feature allows safe sensor replacement in smart home systems. The device's 5kV isolation protects against surges from external connections.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADUM2251ARWZ-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 | ADUM2251ARWZ | ADUM2250ARWZ-RL | ADUM2251WARWZ | ISO1541DR |
|---|---|---|---|---|---|
| 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) | SOIC-8 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms |
| Number of Channels | 2 (1 bidirectional, 1 unidirectional) | 2 (1 bidirectional, 1 unidirectional) | 2 (bidirectional) | 2 (1 bidirectional, 1 unidirectional) | 2 (bidirectional) |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Hot Swap | Yes | Yes | Yes | Yes | No |
| 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 +125°C |
Bảo phân biệt quan trọng
- Hot-swap circuitry prevents data glitches during card insertion (vsISO1541DR)
- Higher isolation voltage (5kV vs 2.5kV) (vsISO1541DR)
- Non-latching bidirectional channels (vsADUM1250ARZ)
Ghi chú thiết kế
For optimal isolation performance, maintain at least 8mm creepage and clearance between the primary and secondary sides of the PCB. Place the ADUM2251ARWZ-RL7 near the board edge to maximize isolation distance. Use a solid ground plane under the device, but split the ground plane beneath the isolation barrier to prevent noise coupling.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each supply if the power source is distant. The device draws low quiescent current, but ensure the supply can handle transient currents during I2C switching.
Do not exceed the absolute maximum ratings for supply voltage (7V) or isolation voltage (5000Vrms). Ensure that the I2C bus pull-up resistors are placed on both sides of the isolation barrier, as the device does not include internal pull-ups. Also, verify that the SDA1/SCL1 and SDA2/SCL2 pins are not left floating when unused.
Thông tin tuân thủ
RoHS compliant per JLCPCB listing. Not AEC-Q100 qualified. Other compliance data not specified in provided sources.