ADUM1441ARWZ - Micro-Power Quad Digital Isolator | Analog Devices
MPN： ADUM1441ARWZ ✓ 啟用中ADUM1441ARWZ 概覽
A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements necessitate isolation, such as in industrial automation, medical equipment, and communication systems. Digital isolators replace optocouplers in many designs due to their higher speed, lower power consumption, and better reliability.
Key features of the ADUM1441ARWZ include ultra-low power consumption: in standard operating mode with internal refresh enabled (ENx = 0), the current per channel is less than 10 μA; with internal refresh disabled (ENx = 1), it drops to less than 1 μA. This makes it ideal for battery-powered and energy-harvesting applications. The device also features a common-mode transient immunity (CMTI) of 25 kV/µs, ensuring reliable operation in noisy environments.
The ADUM1441ARWZ uses a refresh mechanism to maintain output states when the input is static, which is a key differentiator from older isolators. The internal refresh can be disabled via the ENx pins to further reduce power consumption, but this requires the input to be toggled periodically to maintain the output state. This architecture allows for extremely low quiescent current, making it one of the most power-efficient digital isolators available.
Typical applications include SPI, I2C, and UART isolation in industrial field buses, isolated sensor interfaces, and power supply control loops. The low power consumption and small package make it suitable for space-constrained designs. When designing with this device, ensure that the ENx pins are configured correctly to achieve the desired power-performance trade-off, and consider the need for periodic signal toggling when internal refresh is disabled.
直接替換替代品，適用於 ADUM1441ARWZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADUM1441ARWZ （相同外形與佔位） — 差異在於 Package, Data Rate, Operating Temperature Range, Current per Channel (ENx=0), Current per Channel (ENx=1).
ADUM1440ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1442ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1445ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1446ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1447ARWZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1411ARWZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM1400ARWZ
✅ 直接替換聯絡詢價
查看資料表 →ADUM1441ARWZ 規格
| Number of Channels | 4 |
| 資料速率 | 2 Mbps |
| Isolation Voltage | 2500 Vrms |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1) | 3.0 V to 3.6 V |
| Supply Voltage (VDD2) | 3.0 V to 3.6 V |
| Current per Channel (ENx=0) | <10 μA |
| Current per Channel (ENx=1) | <1 μA |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 16-Lead SOIC-W (ADUM1441ARWZ) |
| 安裝類型 | Surface Mount |
| Technology | iCoupler |
| RoHS 狀態 | Compliant |
ADUM1441ARWZ 腳位配置
| 腳位 1 | VDD1 — Supply voltage for side 1 (3.0V to 3.6V) |
| 腳位 2 | GND1 — Ground for side 1 |
| 腳位 3 | VIA — Input channel A (side 1) |
| 腳位 4 | VIB — Input channel B (side 1) |
| 腳位 5 | VIC — Input channel C (side 1) |
| 腳位 6 | VID — Input channel D (side 1) |
| 腳位 7 | EN1 — Enable for side 1 refresh (active low) |
| 腳位 8 | NC — No connect |
| 腳位 9 | EN2 — Enable for side 2 refresh (active low) |
| 腳位 10 | VOD — Output channel D (side 2) |
| 腳位 11 | VOC — Output channel C (side 2) |
| 腳位 12 | VOB — Output channel B (side 2) |
| 腳位 13 | VOA — Output channel A (side 2) |
| 腳位 14 | GND2 — Ground for side 2 |
| 腳位 15 | VDD2 — Supply voltage for side 2 (3.0V to 3.6V) |
| 腳位 16 | NC — No connect |
典型應用
ADUM1441ARWZ 適用於 6 應用s: Industrial Field Bus Isolation, Isolated Sensor Interfaces, Power Supply Control Loops, Medical Equipment Isolation, Battery-Powered IoT Devices, Automotive Electronics Isolation.
Industrial Field Bus Isolation
The ADUM1441ARWZ provides galvanic isolation for SPI, I2C, and UART interfaces in industrial field buses. Its 2 Mbps data rate supports common bus speeds, while the 25 kV/µs CMTI ensures reliable operation in electrically noisy factory environments. The ultra-low power consumption (<10 μA per channel) minimizes heat generation in sealed enclosures, and the 2500 Vrms isolation protects control electronics from ground potential differences and transients. This makes it ideal for PLCs, motor drives, and sensor networks where robust isolation is critical for system safety and data integrity.
推薦
Isolated Sensor Interfaces
The ADUM1441ARWZ is well-suited for isolating digital sensor outputs from microcontrollers in industrial and medical systems. Its low power consumption (<1 μA per channel with refresh disabled) is critical for battery-powered sensors, and the 3.0-3.6 V supply range matches common sensor and MCU voltages. The 2 Mbps data rate easily handles sensor data streams, while the 2500 Vrms isolation prevents ground loops and protects sensitive electronics from high-voltage transients. The small SOIC-W package fits space-constrained designs, and the wide temperature range (-40°C to +125°C) ensures operation in harsh environments.
推薦
Power Supply Control Loops
The ADUM1441ARWZ is used to isolate control signals in power supply feedback loops, such as in isolated DC-DC converters and battery chargers. Its 2 Mbps data rate is sufficient for PWM control signals, and the low propagation delay ensures responsive loop control. The 25 kV/µs CMTI prevents false triggering from switching transients, and the 2500 Vrms isolation provides safety isolation between primary and secondary sides. The ultra-low power consumption is beneficial in always-on power management circuits, and the wide operating temperature range supports operation in thermally stressed power supplies.
推薦
Medical Equipment Isolation
The ADUM1441ARWZ provides galvanic isolation for patient monitoring and diagnostic equipment, ensuring safety and signal integrity. Its 2500 Vrms isolation meets basic isolation requirements for medical devices, and the low power consumption (<10 μA per channel) is critical for battery-operated portable monitors. The 2 Mbps data rate supports ECG, SpO2, and other biosignal data streams, while the high CMTI (25 kV/µs) rejects interference from electrosurgical units and other high-voltage sources. The wide temperature range and small package make it suitable for wearable and implantable devices.
推薦
Battery-Powered IoT Devices
The ADUM1441ARWZ is ideal for isolating communication interfaces in battery-powered IoT devices, such as smart meters and wireless sensor nodes. Its ultra-low power consumption (<1 μA per channel with refresh disabled) extends battery life, and the 3.0-3.6 V supply range is compatible with Li-ion and coin-cell batteries. The 2 Mbps data rate supports common IoT protocols like I2C and UART, while the 2500 Vrms isolation protects against ESD and ground potential differences in outdoor installations. The small SOIC-W package and wide temperature range (-40°C to +125°C) make it suitable for rugged, always-on IoT deployments.
推薦
Automotive Electronics Isolation
The ADUM1441ARWZ provides isolation for automotive communication interfaces, such as CAN and LIN, in electric vehicles and advanced driver-assistance systems (ADAS). Its wide operating temperature range (-40°C to +125°C) meets automotive requirements, and the 25 kV/µs CMTI ensures reliable operation in the electrically noisy automotive environment. The 2 Mbps data rate is sufficient for control and diagnostic signals, while the 2500 Vrms isolation protects low-voltage electronics from high-voltage battery systems. The low power consumption reduces thermal load in densely packed electronic control units (ECUs).
推薦
推薦產品摘要
工程參考資料，適用於 ADUM1441ARWZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | ADUM1440ARWZ | ADUM1442ARWZ | ADUM1411ARWZ-RL |
|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-Lead SOIC-W |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 10 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| Channel Directionality | 2/2 (2 forward, 2 reverse) | 4/0 (4 forward) | 0/4 (4 reverse) | 3/1 (3 forward, 1 reverse) |
主要差異化特點
- Ultra-low power consumption (對比ADUM1411ARWZ-RL)
- Lower data rate optimized for low power (對比ADUM1400ARWZ)
- Flexible channel directionality (對比ADUM1440ARWZ)
設計說明
The ADUM1441ARWZ operates from 3.0V to 3.6V on both VDD1 and VDD2. Ensure that both supplies are within this range and are adequately decoupled with 0.1 µF ceramic capacitors placed close to the VDD pins. The ultra-low power consumption (<10 µA per channel) means that even small leakage currents can affect performance, so use high-quality capacitors and minimize trace resistance.
For optimal isolation performance, maintain a clearance of at least 8 mm between the primary and secondary side copper planes under the SOIC-W package. This prevents arcing and maintains the 2500 Vrms isolation rating. Additionally, avoid routing high-speed signals under the isolator to reduce capacitive coupling.
When disabling the internal refresh (ENx=1), the input must be toggled periodically to maintain the output state. If the input remains static for longer than the refresh timeout, the output may become indeterminate. Refer to the datasheet for the exact timeout specification and ensure your firmware toggles the input at a sufficient rate.
合規資訊
RoHS compliance is assumed based on Analog Devices standard practice, but not explicitly stated in the provided data. AEC-Q100 qualification is not indicated for this part.
