ADUM2250ARWZ - Hot-Swappable Dual I2C Isolator | Analog Devices
MPN: ADUM2250ARWZ ✓ Hoạt độngADUM2250ARWZ Tóm tắt
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. In the context of I2C, the ADuM2250 integrates two bidirectional channels, each using a proprietary iCoupler technology that combines high-speed CMOS and monolithic transformer isolation. This approach offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The ADuM2250 is part of the broader family of digital isolators, which are essential in systems requiring galvanic isolation for safety, noise immunity, or ground loop elimination.
Key features of the ADUM2250ARWZ include its hot-swap capability, which allows insertion or removal of the device without disrupting the I2C bus, and its compatibility with both 3.3 V and 5 V logic levels. The device is available in a 16-lead SOIC-W package (0.295" width, 7.50 mm) and is specified for operation over the industrial temperature range of -40°C to +125°C. The ADuM2250 also features a low propagation delay and supports multi-drop configurations, making it ideal for isolated I2C buses in systems with multiple slaves.
Technically, the ADuM2250 uses Analog Devices' iCoupler technology, which employs chip-scale transformers to transmit data across the isolation barrier. This results in a compact, reliable solution with high isolation voltage and low electromagnetic interference. The device includes an internal oscillator and a refresh mechanism to maintain output states during periods of no data activity, ensuring that the I2C bus remains stable. The hot-swap feature is implemented through a power-on reset and a controlled output enable, preventing glitches on the bus during power-up or removal.
Typical applications for the ADUM2250ARWZ include isolated I2C buses in industrial automation, medical equipment, and power management systems. It is particularly useful in applications where ground potential differences exist between subsystems, such as in motor drives, solar inverters, and battery management systems. The device's high CMTI and 5 kV isolation make it suitable for harsh environments with high voltage transients.
When designing with the ADUM2250ARWZ, it is important to ensure proper decoupling of the power supply pins with 0.1 µF capacitors placed close to the device. Additionally, the pull-up resistors on the I2C lines should be selected based on the bus capacitance and the desired data rate, as the device's open-drain outputs require external pull-ups. The hot-swap feature should be considered in the system design to avoid bus contention during power sequencing.
Bộ thay thế dễ dàng lắp đặt cho ADUM2250ARWZ — 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 ADUM2250ARWZ (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Number of Channels, Package, Common-Mode Transient Immunity (CMTI), Supply Voltage Range.
ADUM2250WARWZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADUM2250ARWZ-RL
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ADUM2251ARWZ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ISO1540DR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISO1541DR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADUM2250ARWZ Thông số kỹ thuật
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 (bidirectional) |
| Tốc độ dữ liệu | 1 Mbps |
| CMTI | 25 kV/µs |
| Điện áp cung cấp | 3.0 V to 5.5 V |
| Current Sink Capability | 30 mA |
| Loại giao diện | I2C |
| Hộp | 16-SOIC (0.295", 7.50mm Width) |
| Nhiệt độ hoạt động | -40°C to +125°C |
| Trạng thái RoHS | Compliant |
| Kiểu lắp đặt | Surface Mount |
| Số lượng chân | 16 |
| Hot-Swap Capable | Yes |
Cấu hình chân ADUM2250ARWZ
| Chân 1 | VDD1 — Side 1 supply voltage |
| Chân 2 | GND1 — Side 1 ground |
| Chân 3 | SDA1 — Side 1 data line (open-drain) |
| Chân 4 | SCL1 — Side 1 clock line (open-drain) |
| Chân 5 | GND1 — Side 1 ground |
| Chân 6 | NC — No connect |
| Chân 7 | NC — No connect |
| Chân 8 | NC — No connect |
| Chân 9 | NC — No connect |
| Chân 10 | GND2 — Side 2 ground |
| Chân 11 | SCL2 — Side 2 clock line (open-drain) |
| Chân 12 | SDA2 — Side 2 data line (open-drain) |
| Chân 13 | GND2 — Side 2 ground |
| Chân 14 | VDD2 — Side 2 supply voltage |
| Chân 15 | NC — No connect |
| Chân 16 | NC — No connect |
Ứng dụng tiêu biểu
ADUM2250ARWZ phù hợp cho 6 Áp dụngs: Industrial Automation, Medical Equipment, Power Management, Telecommunications, Automotive Electronics, IoT and Smart Home.
Industrial Automation
The ADUM2250ARWZ provides 5 kVrms isolation and 25 kV/µs CMTI, making it ideal for isolating I2C buses in industrial motor drives, PLCs, and factory automation systems. Its hot-swap capability allows for safe module replacement without shutting down the entire system. The high CMTI ensures reliable communication in environments with high electromagnetic interference, while the 1 Mbps data rate supports fast sensor and actuator communication.
Được đề xuất
Medical Equipment
In medical devices such as patient monitors and diagnostic equipment, the ADUM2250ARWZ ensures patient safety by providing 5 kVrms isolation between the user interface and the patient-connected circuitry. Its low power consumption and small footprint make it suitable for portable devices. The device's compliance with I2C standards allows seamless integration with medical sensors and ADCs, while the hot-swap feature enables field servicing without powering down critical systems.
Được đề xuất
Power Management
The ADUM2250ARWZ is used in battery management systems (BMS) and solar inverters to isolate the I2C bus between the microcontroller and battery monitoring ICs. Its 5 kVrms isolation protects low-voltage control circuitry from high-voltage transients. The device's 30 mA current sink capability allows it to drive multiple I2C devices, and its wide supply range (3.0V to 5.5V) accommodates various logic levels. The hot-swap feature is beneficial for modular battery packs that may be connected or disconnected while the system is running.
Được đề xuất
Telecommunications
In telecom infrastructure, the ADUM2250ARWZ isolates I2C buses between line cards and control modules, preventing ground loops and protecting against lightning surges. Its high CMTI (25 kV/µs) ensures reliable operation in environments with high voltage transients. The device supports data rates up to 1 Mbps, which is sufficient for managing SFP modules and other I2C-controlled components. The hot-swap capability allows for line card replacement without disrupting service.
Được đề xuất
Automotive Electronics
The ADUM2250ARWZ is suitable for automotive applications such as battery management and infotainment systems, where isolation is required to protect sensitive electronics from high-voltage transients. The automotive-grade variant ADUM2250WARWZ is AEC-Q100 qualified, ensuring reliability in harsh environments. The device's wide temperature range (-40°C to +125°C) and high CMTI make it ideal for under-the-hood applications. Its hot-swap capability is useful for modular battery packs.
Được đề xuất
IoT and Smart Home
In IoT devices and smart home hubs, the ADUM2250ARWZ isolates I2C buses between the main processor and sensor modules, improving noise immunity and safety. Its low power consumption is suitable for battery-powered devices. The device's small 16-SOIC package saves board space, and its compatibility with 3.3V logic allows direct interfacing with common microcontrollers. The hot-swap feature enables easy sensor replacement in modular IoT systems.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADUM2250ARWZ — 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 | ADUM2250WARWZ | ADUM2250ARWZ-RL | ISO1540DR |
|---|---|---|---|---|
| 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) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Current Sink Capability | 30 mA | 30 mA | 30 mA | 30 mA |
| Hot-Swap Capable | Yes | Yes | Yes | No |
Bảo phân biệt quan trọng
- Higher isolation voltage (5 kVrms) compared to ISO1540DR (vsISO1540DR)
- Hot-swap capability not available on ISO1540DR (vsISO1540DR)
- Automotive-grade variant available (vsADUM2250ARWZ-RL)
Ghi chú thiết kế
Place 0.1 µF decoupling capacitors close to VDD1 and VDD2 pins to ensure stable operation. Use a 10 µF capacitor in parallel for bulk decoupling. The PCB layout should minimize trace length between the isolator and I2C devices to reduce parasitic capacitance and maintain signal integrity.
Ensure that the pull-up resistors on the I2C lines are sized correctly for the bus capacitance and data rate. The ADUM2250ARWZ has open-drain outputs, so external pull-ups are required. For 1 Mbps operation, use pull-up resistors in the range of 1 kΩ to 2 kΩ. Also, avoid exceeding the maximum sink current of 30 mA.
The ADUM2250ARWZ dissipates minimal power, but in high-temperature environments, ensure adequate airflow or thermal relief. The device is rated for -40°C to +125°C, so verify that the junction temperature stays within limits under worst-case conditions. For high data rates and multiple I2C devices, consider the power dissipation from the pull-up resistors.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Automotive grade variant ADUM2250WARWZ is AEC-Q100 qualified.