ADUM2251ARWZ - Hot-Swappable Dual I2C Isolator, 5kV | Analog Devices
部品番号: ADUM2251ARWZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.92 | $392.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
ADUM2251ARWZ 概要
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. Unlike optocouplers, which use light to transfer signals, digital isolators use capacitive or magnetic coupling, offering higher speed, better reliability, and longer lifespan. The ADUM2251 is specifically designed for I2C interfaces, which are bidirectional and require special handling to avoid data corruption. It integrates the necessary level shifting and direction control, eliminating the need for external components.
Key features include hot-swap capability, which allows the device to be inserted or removed from a live bus without causing glitches, and non-latching bidirectional channels that prevent bus lock-up. The 30 mA current sink capability ensures compatibility with standard I2C devices, while the 1 Mbps data rate supports fast-mode I2C. The wide supply range of 3V to 5.5V allows operation with both 3.3V and 5V logic levels.
Technically, the ADUM2251 uses Analog Devices' iCoupler technology, which employs chip-scale transformers for isolation. This provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better temperature stability. The device also features a thermal shutdown protection and is rated for operation from -40°C to +105°C, making it suitable for harsh environments.
Typical applications include isolated I2C buses in industrial automation, power supply monitoring, and medical equipment. It is also used in automotive systems for battery management and sensor interfaces. The ADUM2251's hot-swap feature is particularly valuable in redundant systems where boards are replaced without powering down.
When designing with the ADUM2251, ensure proper decoupling with 0.1µF capacitors on both supply pins and place them close to the device. Also, consider the isolation barrier's creepage and clearance distances for the required isolation rating.
ドロップイン代替品: ADUM2251ARWZ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: ADUM2251ARWZ （同一形状・フットプリント） — 相違点: Number of Channels, Operating Temperature, Operating Temperature Range, Supply Voltage Range.
クイック比較ツール — 並列比較する代替部品を選択:
ADUM2251ARWZ-RL
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ADUM2250ARWZ
✅ ドロップイン✓ 在庫あり
$2.8 / 個
データシートを見る →ADUM1250ARWZ
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ISO1541DR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ISO1540DR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
ADUM2251ARWZ 仕様
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 (bidirectional) |
| データレート | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage Range | 3 V to 5.5 V |
| Current Sink Capability | 30 mA |
| インターフェースタイプ | I2C |
| パッケージ | 16-SOIC (0.295", 7.50mm Width) |
| 動作温度範囲 | -40°C to +105°C |
| RoHS ステータス | Compliant |
| 実装タイプ | Surface Mount |
| Hot-Swap Capable | Yes |
ADUM2251ARWZ ピン構成
| ピン 1 | VDD1 — Supply voltage side 1 |
| ピン 2 | GND1 — Ground side 1 |
| ピン 3 | SDA1 — I2C data line side 1 |
| ピン 4 | SCL1 — I2C clock line side 1 |
| ピン 5 | NC — No connect |
| ピン 6 | NC — No connect |
| ピン 7 | NC — No connect |
| ピン 8 | NC — No connect |
| ピン 9 | NC — No connect |
| ピン 10 | NC — No connect |
| ピン 11 | NC — No connect |
| ピン 12 | NC — No connect |
| ピン 13 | SCL2 — I2C clock line side 2 |
| ピン 14 | SDA2 — I2C data line side 2 |
| ピン 15 | GND2 — Ground side 2 |
| ピン 16 | VDD2 — Supply voltage side 2 |
主な用途
ADUM2251ARWZ の用途: 6 件s: Industrial Automation, Power Supply Monitoring, Medical Equipment, Automotive Battery Management, IoT and Smart Home, Telecommunications.
Industrial Automation
The ADUM2251ARWZ provides 5000Vrms isolation for I2C buses in industrial control systems, protecting low-voltage logic from high-voltage transients and ground loops. Its 25kV/µs CMTI ensures reliable operation in noisy environments. The hot-swap capability allows live insertion of modules without disrupting the bus, which is critical for redundant systems. The wide temperature range (-40°C to +105°C) suits harsh factory floors.
おすすめ
Power Supply Monitoring
In power supply systems, the ADUM2251ARWZ isolates the I2C bus between the controller and monitoring ICs, preventing ground potential differences from causing errors. Its 30 mA current sink capability drives multiple I2C devices, and the 1 Mbps data rate supports fast telemetry. The hot-swap feature enables safe replacement of power modules in live systems, improving serviceability.
おすすめ
Medical Equipment
The ADUM2251ARWZ is used in medical devices to isolate patient-connected I2C sensors from the main control unit, ensuring safety and preventing leakage currents. Its 5000Vrms isolation meets stringent medical safety standards. The low propagation delay and high CMTI ensure accurate data transmission in real-time monitoring systems. The compact SOIC-W package fits space-constrained designs.
おすすめ
Automotive Battery Management
In electric vehicles, the ADUM2251ARWZ isolates the I2C bus between the battery management controller and cell monitoring ICs, protecting against high-voltage transients. Its wide temperature range and 5000Vrms isolation make it suitable for automotive environments. The hot-swap capability allows safe battery pack replacement. The 1 Mbps data rate supports fast cell voltage and temperature readings.
おすすめ
IoT and Smart Home
The ADUM2251ARWZ isolates I2C sensors and actuators in smart home hubs, preventing ground loops and improving reliability. Its low power consumption and small package are ideal for compact IoT devices. The hot-swap feature enables easy firmware updates or sensor replacement without powering down the system. The 3V to 5.5V supply range supports both 3.3V and 5V logic.
おすすめ
Telecommunications
In telecom equipment, the ADUM2251ARWZ isolates I2C buses between line cards and control modules, ensuring reliable communication in high-EMI environments. Its 25kV/µs CMTI prevents data corruption from transients. The 1 Mbps data rate supports high-speed I2C for configuration and monitoring. The hot-swap capability allows line card replacement without service interruption.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ADUM2251ARWZ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ADUM2251ARWZ-RL | ADUM2250ARWZ | ADUM1250ARWZ | 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) | 16-SOIC (0.295", 7.50mm Width) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 5000 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 400 kbps | 1 Mbps | 1 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Current Sink | 30 mA | 30 mA | 30 mA | 30 mA | 30 mA |
| Hot-Swap | Yes | Yes | Yes | No | No |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +85°C | -40°C to +125°C |
主な差別化要因
- Hot-swap capability （vs ADUM1250ARWZ)
- Higher isolation voltage （vs ADUM1250ARWZ)
- Higher data rate （vs ADUM2250ARWZ)
設計ノート
Place 0.1µF decoupling capacitors close to VDD1 and VDD2 pins to ensure stable operation. Use a solid ground plane under the device to minimize noise. For high-voltage isolation, maintain proper creepage and clearance distances between the two sides of the isolation barrier as per the datasheet recommendations.
Keep the I2C traces short and balanced to minimize parasitic capacitance and crosstalk. Route SDA and SCL lines away from high-voltage or high-current traces. Use series resistors (e.g., 33Ω) if needed to damp reflections. Ensure the isolation barrier is not bridged by any copper pour or traces.
Do not exceed the absolute maximum ratings for supply voltage (7V) or output current. Ensure the I2C bus pull-up resistors are sized correctly for the total capacitance and data rate. The ADUM2251 is hot-swappable, but avoid inserting or removing the device while the bus is active to prevent glitches. Verify the pinout matches your PCB footprint before assembly.
コンプライアンス情報
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable for this commercial-grade part.