ADUM1442ARWZ - Micropower Quad-Channel Digital Isolator | Analog Devices
部品番号: ADUM1442ARWZ ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.5 | $1,250.00 |
| 1,000 | $2.25 | $2,250.00 |
ADUM1442ARWZ 概要
Digital isolators are essential components in systems requiring galvanic isolation between different ground domains, protecting sensitive electronics from high-voltage transients and ground loops. They are widely used in industrial automation, medical equipment, and communication interfaces. The ADUM1442ARWZ is specifically designed for low-power applications, with a typical quiescent current of less than 10 µA per channel when internal refresh is enabled (ENx = 0), and less than 1 µA per channel when internal refresh is disabled (ENx = 1). This makes it ideal for battery-powered and energy-harvesting systems where power consumption is critical.
Key features of the ADUM1442ARWZ include its micropower operation, high CMTI of 25 kV/µs, and a wide operating temperature range. The device supports a data rate of 2 Mbps, suitable for slow serial communication interfaces like SPI and I2C. The isolation voltage rating is 2500 Vrms for the ARWZ variant, which is sufficient for many industrial and medical applications. The device also features an enable pin (ENx) for each channel pair, allowing the user to disable the internal refresh oscillator to further reduce power consumption.
In terms of technical depth, the ADUM1442ARWZ uses iCoupler technology, which integrates micro-transformers on a CMOS die, providing reliable isolation without the need for external components. The device is fully specified over the entire operating range, ensuring consistent performance across temperature and supply variations. The propagation delay is typically 100 ns, and the pulse width distortion is minimal, making it suitable for precise timing applications.
Typical applications for the ADUM1442ARWZ include isolated SPI interfaces, industrial fieldbus communication, medical patient monitoring, and battery management systems. Its low power consumption and high CMTI make it particularly well-suited for applications where noise immunity and power efficiency are paramount.
When designing with this device, it is important to ensure proper decoupling of the power supply pins with 0.1 µF capacitors placed close to the device. Additionally, the enable pins should be configured according to the desired power-saving mode, and the input/output logic levels should be compatible with the connected circuitry.
ドロップイン代替品: ADUM1442ARWZ — 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: ADUM1442ARWZ （同一形状・フットプリント） — 相違点: Package, Data Rate, Operating Temperature Range, Current per Channel (ENx=0), Current per Channel (ENx=1).
クイック比較ツール — 並列比較する代替部品を選択:
ADUM1441ARWZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.1 / 個
データシートを見る →ADUM1440ARWZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.25 / 個
データシートを見る →ADUM1445ARWZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.1 / 個
データシートを見る →ADUM1446ARWZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$2.1 / 個
データシートを見る →ADUM1447ARWZ
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$5.6 / 個
データシートを見る →ADUM1442ARWZ 仕様
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| データレート | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| 動作温度範囲 | -40°C to +125°C |
| Quiescent Current per Channel (ENx=0) | <10 µA |
| Quiescent Current per Channel (ENx=1) | <1 µA |
| Propagation Delay | 100 ns (typical) |
| パッケージ | 16-Lead SOIC-W |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| Technology | iCoupler |
| 出力タイプ | Digital |
ADUM1442ARWZ ピン構成
| ピン 1 | VDD1 — Supply voltage for side 1 |
| ピン 2 | GND1 — Ground for side 1 |
| ピン 3 | VIA — Input channel A |
| ピン 4 | VOA — Output channel A |
| ピン 5 | VIB — Input channel B |
| ピン 6 | VOB — Output channel B |
| ピン 7 | EN1 — Enable for channels A and B |
| ピン 8 | GND1 — Ground for side 1 |
| ピン 9 | GND2 — Ground for side 2 |
| ピン 10 | EN2 — Enable for channels C and D |
| ピン 11 | VOC — Output channel C |
| ピン 12 | VIC — Input channel C |
| ピン 13 | VOD — Output channel D |
| ピン 14 | VID — Input channel D |
| ピン 15 | GND2 — Ground for side 2 |
| ピン 16 | VDD2 — Supply voltage for side 2 |
主な用途
ADUM1442ARWZ の用途: 6 件s: Isolated SPI Interface, Medical Patient Monitoring, Battery Management Systems, Industrial Fieldbus Communication, Isolated Power Supply Feedback, Isolated Sensor Data Acquisition.
Isolated SPI Interface
The ADUM1442ARWZ provides galvanic isolation for SPI buses in industrial sensors and motor drives. With 4 channels, it can isolate SCLK, MOSI, MISO, and CS signals. Its 2 Mbps data rate is sufficient for most SPI peripherals, and its low power consumption is ideal for battery-powered field devices. The high CMTI of 25 kV/µs ensures reliable operation in noisy industrial environments, preventing data corruption from voltage transients.
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Medical Patient Monitoring
In medical devices, the ADUM1442ARWZ isolates sensitive patient-connected circuits from the main system, ensuring safety and preventing ground loops. Its 2500 Vrms isolation rating meets typical medical safety standards. The micropower operation extends battery life in portable monitors. The wide temperature range and high reliability make it suitable for continuous monitoring applications.
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Battery Management Systems
The ADUM1442ARWZ is used in battery management systems to isolate the cell monitoring circuitry from the main controller. Its low quiescent current (<10 µA per channel) is critical for minimizing battery drain. The 4 channels can isolate communication lines between the battery pack and the host. The high CMTI ensures reliable operation in the presence of switching noise from power converters.
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Industrial Fieldbus Communication
For industrial fieldbus systems like Profibus or Modbus, the ADUM1442ARWZ provides isolation between the bus transceiver and the controller. Its 2 Mbps data rate supports common fieldbus speeds. The high CMTI of 25 kV/µs protects against transient voltages from motors and relays. The device's small SOIC-W package saves board space in space-constrained industrial modules.
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Isolated Power Supply Feedback
The ADUM1442ARWZ can be used to isolate the feedback signal in switch-mode power supplies, providing a safe path for the error amplifier output. Its low propagation delay (100 ns) ensures fast response. The micropower operation reduces the load on the auxiliary supply. The device's high CMTI prevents false triggering from switching noise.
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Isolated Sensor Data Acquisition
In data acquisition systems, the ADUM1442ARWZ isolates the sensor interface from the main ADC and controller. This prevents ground loops and reduces noise. The 4 channels can carry clock, data, and control signals. The low power consumption is beneficial for remote sensor nodes. The wide temperature range allows operation in harsh environments.
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おすすめ製品の概要
エンジニアリング参考データ: ADUM1442ARWZ — 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 | ADUM1442ARQZ | ADUM1442ARSZ | ADUM1441ARWZ |
|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-Lead QSOP | 20-Lead SSOP | 16-Lead SOIC-W |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Quiescent Current per Channel (ENx=0) | <10 µA | <10 µA | <10 µA | <10 µA |
| Channel Direction | 3/1 (3 forward, 1 reverse) | 3/1 | 3/1 | 2/2 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
主な差別化要因
- Micropower operation with <10 µA per channel （vs ADUM1442ARQZ)
- High CMTI of 25 kV/µs （vs ADUM1442ARSZ)
- Pin-compatible with other ADuM144x variants （vs ADUM1441ARWZ)
設計ノート
Ensure that both VDD1 and VDD2 are within the specified range of 3.0 V to 3.6 V. Use 0.1 µF decoupling capacitors placed as close as possible to each supply pin. For optimal performance, a 10 µF bulk capacitor may be added if the supply is noisy. The micropower operation means that the supply current is very low, but proper decoupling is still essential to maintain signal integrity.
For high CMTI performance, keep the PCB layout symmetrical and minimize parasitic capacitance between the two sides of the isolation barrier. Avoid routing high-speed signals under the device. Use a solid ground plane on each side, but do not connect the grounds together except through the isolation barrier. This ensures that the CMTI specification is met.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. The enable pins (EN1, EN2) should be tied to the appropriate logic level to achieve the desired power mode. When ENx=1, the internal refresh is disabled, which reduces power but may affect the output state if the input is not toggling. Ensure that the input signals are properly terminated to avoid floating inputs.
コンプライアンス情報
RoHS compliance is indicated by the 'Z' suffix in the part number. Other compliance details are not specified in the provided data.
