ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices
MPN： ADUM1446ARWZ ✓ 啟用中ADUM1446ARWZ 概覽
Digital isolators are components that transmit digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, noise, and ground loops. They are essential in industrial automation, medical devices, and communication systems where safety and signal integrity are paramount. The ADUM1446ARWZ uses Analog Devices' iCoupler technology, which combines high-speed CMOS and monolithic transformer isolation to achieve reliable performance without the wear-out mechanisms of optocouplers.
Key features include a 2.5 kVrms isolation rating, a wide operating temperature range of -40°C to +125°C, and a compact 16-lead SOIC-W package. The device supports both 3.3 V and 5 V logic levels, making it versatile for mixed-voltage systems. Its low propagation delay and high CMTI ensure robust operation in noisy industrial environments.
Technically, the ADUM1446ARWZ integrates four independent isolation channels with a refresh mechanism that reduces power consumption when the input signal is static. The enable pins (ENx) allow each channel to be individually controlled, further optimizing power usage. The device is fully specified over the recommended operating range of 3.0 V to 3.6 V, ensuring consistent performance across temperature and voltage variations.
Typical applications include isolated SPI interfaces, industrial fieldbus communication, medical patient monitoring, and isolated sensor data acquisition. The low power consumption and high reliability make it suitable for portable and remote monitoring equipment.
When designing with the ADUM1446ARWZ, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Bypass capacitors should be placed close to the VDD pins to minimize noise and ensure stable operation.
直接替換替代品，適用於 ADUM1446ARWZ — 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： ADUM1446ARWZ （相同外形與佔位） — 差異在於 Package, Current per Channel (ENx=0), Current per Channel (ENx=1), Output Type.
ADUM1445ARWZ
✅ 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 →ISO7741DW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
Si8641BB-B-IS1
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADUM1446ARWZ 規格
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| 資料速率 | 2 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 3.6 V |
| Quiescent Current per Channel (ENx=0) | <10 µA |
| Quiescent Current per Channel (ENx=1) | <1 µA |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 16-Lead SOIC-W |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Isolation Rating | 2500 Vrms |
ADUM1446ARWZ 腳位配置
| 腳位 1 | VDD1 — Supply voltage, side 1 |
| 腳位 2 | GND1 — Ground, 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, side 1 |
| 腳位 8 | GND1 — Ground, side 1 |
| 腳位 9 | GND2 — Ground, side 2 |
| 腳位 10 | EN2 — Enable, side 2 |
| 腳位 11 | VOD — Output channel D, side 2 |
| 腳位 12 | VOC — Output channel C, side 2 |
| 腳位 13 | VOB — Output channel B, side 2 |
| 腳位 14 | VOA — Output channel A, side 2 |
| 腳位 15 | GND2 — Ground, side 2 |
| 腳位 16 | VDD2 — Supply voltage, side 2 |
典型應用
ADUM1446ARWZ 適用於 6 應用s: Industrial Fieldbus Communication, Medical Patient Monitoring, Isolated SPI Interface, Battery-Powered Sensor Nodes, Isolated Power Supply Control, Automotive Battery Management.
Industrial Fieldbus Communication
The ADUM1446ARWZ provides galvanic isolation for industrial fieldbus interfaces such as RS-485 and CAN. Its 2 Mbps data rate and 25 kV/µs CMTI ensure reliable communication in noisy factory environments. The low quiescent current (<10 µA per channel) minimizes power consumption in remote I/O modules. The 2.5 kVrms isolation protects microcontrollers from ground loops and voltage transients. When used with a transceiver like the ADM2483, it enables robust, isolated communication links.
推薦
Medical Patient Monitoring
In medical devices, the ADUM1446ARWZ isolates sensitive patient-connected sensors from the main control unit, ensuring safety and signal integrity. Its 2.5 kVrms isolation meets medical safety standards, while the low power consumption extends battery life in portable monitors. The wide operating temperature range (-40°C to +125°C) supports reliable operation in clinical environments. The device's high CMTI prevents false triggering from defibrillator pulses or electrosurgical equipment.
推薦
Isolated SPI Interface
The ADUM1446ARWZ is ideal for isolating SPI buses between microcontrollers and peripheral devices such as ADCs and DACs. Its 2 Mbps data rate supports common SPI clock frequencies, and the four channels can be configured for MOSI, MISO, SCK, and CS signals. The low propagation delay ensures minimal timing skew, and the enable pins allow power saving when the SPI bus is idle. This isolation prevents ground loops and noise from corrupting sensitive analog measurements.
推薦
Battery-Powered Sensor Nodes
For wireless sensor nodes, the ADUM1446ARWZ provides isolation with minimal power drain. Its quiescent current of less than 1 µA per channel (with refresh disabled) is critical for extending battery life. The device can isolate digital sensors, wake-up signals, and communication interfaces while maintaining a small footprint. The 3.0 V to 3.6 V supply range is compatible with Li-ion batteries and energy harvesting circuits.
推薦
Isolated Power Supply Control
The ADUM1446ARWZ can be used to isolate control signals in power supply designs, such as feedback loops and enable signals. Its high CMTI ensures stable operation in the presence of switching noise. The low power consumption reduces the burden on the isolated side's power supply. The device's four channels can carry PWM signals, fault indicators, and control commands across the isolation barrier.
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Automotive Battery Management
In automotive battery management systems, the ADUM1446ARWZ isolates cell monitoring circuits from the main controller. Its 2.5 kVrms isolation and wide temperature range meet automotive requirements. The low power consumption is beneficial for always-on monitoring. The device's high CMTI ensures reliable communication in the presence of motor noise and load transients.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM1446ARWZ — 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 | ADUM1446ARQZ | ADUM1446ARSZ | ADUM1445ARWZ | ADUM1447ARWZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|---|
| Package | 16-Lead SOIC-W | 16-SSOP | 20-SSOP | 16-Lead SOIC-W | 16-Lead SOIC-W | 16-SOIC | 16-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 3750 Vrms | 2500 Vrms | 2500 Vrms | 5000 Vrms | 2500 Vrms |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 35 kV/µs |
| Quiescent Current per Channel | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | <10 µA (ENx=0), <1 µA (ENx=1) | 1.5 mA per channel | 1.6 mA per channel |
| 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 | 3.0 V to 3.6 V | 2.25 V to 5.5 V | 2.5 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -55°C to +125°C | -40°C to +125°C |
主要差異化特點
- Ultra-low power consumption (對比ISO7741DW)
- Micropower operation with enable pins (對比Si8641BB-B-IS1)
- Same-package drop-in alternatives (對比ADUM1446ARQZ)
設計說明
For optimal performance, place bypass capacitors (0.1 µF and 10 µF) close to the VDD1 and VDD2 pins. Ensure a solid ground plane on both sides of the isolation barrier. Maintain adequate creepage and clearance distances (at least 4 mm for 2500 Vrms) between the isolated sides to meet safety standards.
The ADUM1446ARWZ consumes very low power, but the supply voltage must be within 3.0 V to 3.6 V. Use low-dropout regulators (LDOs) to provide clean power. If the internal refresh is disabled (ENx=1), the quiescent current drops to <1 µA per channel, which is beneficial for battery-powered designs.
Do not exceed the absolute maximum ratings for supply voltage or input/output voltages. Ensure that the enable pins (EN1, EN2) are properly configured to avoid unintended shutdown. When using the device in high-noise environments, consider adding ferrite beads on the power supply lines to reduce EMI.
合規資訊
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.
