ADUM2251ARWZ-RL7 - Hot-Swappable I2C Isolator 5kV | Analog Devices
部品番号: ADUM2251ARWZ-RL7 ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
ADUM2251ARWZ-RL7 概要
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.
ドロップイン代替品: ADUM2251ARWZ-RL7 — 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-RL7 （同一形状・フットプリント） — 相違点: Number of Channels, Package, Common-Mode Transient Immunity (CMTI), Operating Temperature Range.
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ADUM2251ARWZ
✅ ドロップイン✓ 在庫あり
$3.1 / 個
データシートを見る →ADUM2250ARWZ-RL
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ADUM2251WARWZ
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ADUM2251ARWZ-RL7 仕様
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 2 (1 bidirectional, 1 unidirectional) |
| データレート | 1 Mbps |
| CMTI | 25 kV/µs |
| インターフェースタイプ | I2C |
| 電源電圧 | 3.0 V to 5.5 V |
| 動作温度 | -40°C to +105°C |
| パッケージ | 16-SOIC (0.295", 7.50mm Width) |
| 実装タイプ | Surface Mount |
| Hot Swap | Yes |
| Non-Latching | Yes |
| RoHS | Compliant |
| Technology | iCoupler |
ADUM2251ARWZ-RL7 ピン構成
| ピン 1 | VDD1 — Primary supply voltage |
| ピン 2 | GND1 — Primary ground |
| ピン 3 | SDA1 — Bidirectional data line (side 1) |
| ピン 4 | SCL1 — Bidirectional 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 — Unidirectional clock line (side 2) |
| ピン 14 | SDA2 — Bidirectional data line (side 2) |
| ピン 15 | GND2 — Secondary ground |
| ピン 16 | VDD2 — Secondary supply voltage |
主な用途
ADUM2251ARWZ-RL7 の用途: 6 件s: 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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
おすすめ
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.
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-RL7 — 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 | 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 |
主な差別化要因
- Hot-swap circuitry prevents data glitches during card insertion （vs ISO1541DR)
- Higher isolation voltage (5kV vs 2.5kV) （vs ISO1541DR)
- Non-latching bidirectional channels （vs ADUM1250ARZ)
設計ノート
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.
コンプライアンス情報
RoHS compliant per JLCPCB listing. Not AEC-Q100 qualified. Other compliance data not specified in provided sources.