ADUM1446ARWZ - Micropower Quad Digital Isolator | Analog Devices
料号： ADUM1446ARWZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.5 | $3.50 |
| 10 | $3.15 | $31.50 |
| 100 | $2.8 | $280.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.1 | $2,100.00 |
ADUM1446ARWZ 概述
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.
直接替换替代料： ADUM1446ARWZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADUM1446ARWZ （相同外形与封装尺寸） ——差异在于 Package, Current per Channel (ENx=0), Current per Channel (ENx=1), Output Type.
快速对比工具——选择替代料号进行并排对比：
ADUM1445ARWZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.1 / 个
查看数据手册 →ADUM1447ARWZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$5.6 / 个
查看数据手册 →ISO7741DW
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
Si8641BB-B-IS1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADUM1446ARWZ 规格参数
| Number of Channels | 4 |
| Isolation Voltage | 2500 Vrms |
| 数据速率 | 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 |
| 工作温度范围 | -40°C to +125°C |
| 封装 | 16-Lead SOIC-W |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
| Isolation Rating | 2500 Vrms |
ADUM1446ARWZ 引脚配置
| 引脚 1 | VDD1 — Supply voltage, side 1 |
| 引脚 2 | GND1 — Ground, side 1 |
| 引脚 3 | VIA — Input channel A, side 1 |
| 引脚 4 | VIB — Input channel B, side 1 |
| 引脚 5 | VIC — Input channel C, side 1 |
| 引脚 6 | VID — Input channel D, side 1 |
| 引脚 7 | EN1 — Enable, side 1 |
| 引脚 8 | GND1 — Ground, side 1 |
| 引脚 9 | GND2 — Ground, side 2 |
| 引脚 10 | EN2 — Enable, side 2 |
| 引脚 11 | VOD — Output channel D, side 2 |
| 引脚 12 | VOC — Output channel C, side 2 |
| 引脚 13 | VOB — Output channel B, side 2 |
| 引脚 14 | VOA — Output channel A, side 2 |
| 引脚 15 | GND2 — Ground, side 2 |
| 引脚 16 | VDD2 — Supply voltage, side 2 |
典型应用
ADUM1446ARWZ 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ADUM1446ARWZ ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Ultra-low power consumption （对比 ISO7741DW)
- Micropower operation with enable pins （对比 Si8641BB-B-IS1)
- Same-package drop-in alternatives （对比 ADUM1446ARQZ)
设计说明
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.
合规信息
RoHS compliant per Analog Devices product page. Other compliance data not specified in the provided data.
