ADUM1440ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
MPN： ADUM1440ARWZ-RL7 ✓ 啟用中ADUM1440ARWZ-RL7 概覽
A digital isolator is a component that transfers digital signals across an isolation barrier, providing galvanic isolation to protect circuits and users from high voltages, ground loops, and noise. It is a key element in industrial, medical, and communication systems where safety and signal integrity are critical. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators.
Key features of the ADUM1440ARWZ-RL7 include its micropower consumption, with a typical supply current of 0.6 mA per channel at 2 Mbps, making it ideal for battery-powered and energy-harvesting applications. The device also features a default high output state, which ensures a defined output during power-up or when the input is unpowered, enhancing system safety. The iCoupler technology provides superior performance compared to optocouplers, including higher data rates, lower power, and better reliability.
Technically, the ADUM1440ARWZ-RL7 uses monolithic air core transformers to couple signals across the isolation barrier, combined with CMOS logic for signal processing. This architecture enables high-speed operation with low propagation delay and excellent timing accuracy. The device is specified over the industrial temperature range of -40°C to +125°C, making it suitable for harsh environments.
Typical applications include industrial fieldbus communication, isolated SPI interfaces, medical patient monitoring, and power supply control. The low power consumption and small package make it ideal for space-constrained designs. When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances to maintain the isolation rating. Also, decouple each supply pin with a 0.1 µF capacitor close to the device.
直接替換替代品，適用於 ADUM1440ARWZ-RL7 — 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： ADUM1440ARWZ-RL7 （相同外形與佔位） — 差異在於 Package, Supply Voltage (VDD1/VDD2), Default Output State, Isolation Voltage, Channel Directionality.
ADUM1441ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1442ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1445ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1446ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1447ARWZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM1400ARWZ
⚡ 相同封裝聯絡詢價
查看資料表 →ADUM1440ARWZ-RL7 規格
| Number of Channels | 4 |
| Channel Directionality | 4/0 (all forward) |
| Default Output State | High |
| Isolation Voltage | 2500 Vrms |
| 資料速率 | 2 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 2.25 V to 3.6 V |
| Supply Current per Channel | 0.6 mA typical at 2 Mbps |
| 工作溫度範圍 | -40°C to +125°C |
| 封裝 | 16-SOIC-W (0.300" width) |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Technology | iCoupler |
ADUM1440ARWZ-RL7 腳位配置
| 腳位 1 | VDD1 — Supply voltage for side 1 |
| 腳位 2 | GND1 — Ground for side 1 |
| 腳位 3 | VIA — Input channel A |
| 腳位 4 | VIB — Input channel B |
| 腳位 5 | VIC — Input channel C |
| 腳位 6 | VID — Input channel D |
| 腳位 7 | GND1 — Ground for side 1 |
| 腳位 8 | NC — No connect |
| 腳位 9 | VOD — Output channel D |
| 腳位 10 | VOC — Output channel C |
| 腳位 11 | VOB — Output channel B |
| 腳位 12 | VOA — Output channel A |
| 腳位 13 | GND2 — Ground for side 2 |
| 腳位 14 | NC — No connect |
| 腳位 15 | VDD2 — Supply voltage for side 2 |
| 腳位 16 | GND2 — Ground for side 2 |
典型應用
ADUM1440ARWZ-RL7 適用於 6 應用s: Industrial Fieldbus Communication, Isolated SPI Interface, Medical Patient Monitoring, Power Supply Control, Battery-Powered IoT Devices, Automotive Electronics.
Industrial Fieldbus Communication
The ADUM1440ARWZ-RL7 is ideal for industrial fieldbus systems such as RS-485, CAN, and Profibus, where galvanic isolation is required to protect against ground loops and voltage transients. Its 2500 Vrms isolation and 25 kV/µs CMTI ensure reliable data transmission in noisy factory environments. The 2 Mbps data rate is sufficient for most fieldbus protocols, and the low power consumption reduces heat in enclosed control cabinets. The default high output state provides a defined logic level during power-up, preventing spurious signals on the bus.
推薦
Isolated SPI Interface
The ADUM1440ARWZ-RL7 provides four channels, making it suitable for isolating SPI signals (SCLK, MOSI, MISO, CS) between a microcontroller and peripheral devices. The 2 Mbps data rate supports standard SPI speeds, and the default high output state is beneficial for chip-select lines. The low power consumption is advantageous in battery-powered sensors. The 2500 Vrms isolation protects sensitive digital logic from high-voltage transients in industrial or medical environments. Proper PCB layout with adequate creepage is essential to maintain isolation.
推薦
Medical Patient Monitoring
In medical devices such as patient monitors and ECG machines, the ADUM1440ARWZ-RL7 provides galvanic isolation to protect patients from electric shock. Its 2500 Vrms isolation meets basic safety requirements, and the low power consumption is ideal for portable devices. The 2 Mbps data rate is sufficient for transmitting biosignals, and the default high output state ensures safe operation during power-up. The wide temperature range of -40°C to +125°C allows use in various clinical environments. The iCoupler technology offers higher reliability than optocouplers.
推薦
Power Supply Control
The ADUM1440ARWZ-RL7 is used to isolate control signals in power supply systems, such as digital power controllers and isolated DC-DC converters. It transmits PWM signals across the isolation barrier with a data rate of 2 Mbps, sufficient for most switching frequencies. The high CMTI of 25 kV/µs ensures stable operation in the presence of fast voltage transients from switching nodes. The low power consumption reduces the load on the auxiliary supply. The default high output state prevents unintended turn-on of power switches during power-up.
推薦
Battery-Powered IoT Devices
The ADUM1440ARWZ-RL7 is ideal for IoT devices that require isolation between sensor nodes and communication modules. Its micropower consumption (0.6 mA per channel) extends battery life, and the 2.25V to 3.6V supply range is compatible with common battery voltages. The 2 Mbps data rate supports sensor data transmission, and the 2500 Vrms isolation protects against ESD and ground potential differences. The small SOIC-W package is suitable for compact designs. The default high output state ensures reliable operation during power-up.
推薦
Automotive Electronics
The ADUM1440ARWZ-RL7 is suitable for automotive applications such as battery management systems and motor control, where isolation is required between high-voltage and low-voltage domains. Its 2500 Vrms isolation and 25 kV/µs CMTI handle the harsh electrical environment of vehicles. The wide temperature range of -40°C to +125°C meets automotive requirements. The low power consumption reduces load on the vehicle's electrical system. The default high output state ensures safe operation during power-up. However, for AEC-Q100 qualified parts, consider the ADUM1440ARWZ-RL7 is not qualified; use ADUM1440ARQZ-RL7 for non-automotive.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM1440ARWZ-RL7 — 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 | ADUM1440ARQZ-RL7 | ADUM1441ARWZ-RL7 | ADUM1442ARWZ-RL7 | ADUM1445ARWZ-RL7 | ADUM1446ARWZ-RL7 | ADUM1447ARWZ-RL7 | ADUM1400ARWZ | ADUM1201ARZ |
|---|---|---|---|---|---|---|---|---|---|
| Package | 16-SOIC-W | 16-SSOP | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 16-SOIC-W | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 2 |
| Channel Directionality | 4/0 | 4/0 | 3/1 | 2/2 | 4/0 | 3/1 | 2/2 | 4/0 | 1/1 |
| Default Output State | High | High | High | High | Low | Low | Low | High | High |
| Data Rate | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 2 Mbps | 90 Mbps | 1 Mbps |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
主要差異化特點
- Micropower consumption (對比ADUM1400ARWZ)
- Default high output state (對比ADUM1445ARWZ-RL7)
- 4/0 channel directionality (對比ADUM1441ARWZ-RL7)
設計說明
For the ADUM1440ARWZ-RL7, ensure proper PCB layout to maintain the isolation rating. Provide adequate creepage and clearance distances between the two sides of the isolation barrier, typically at least 8 mm for 2500 Vrms. Place a 0.1 µF decoupling capacitor close to each VDD pin (VDD1 and VDD2) to minimize supply noise. Use a solid ground plane on each side, but do not connect the two ground planes together except through the isolation barrier.
The ADUM1440ARWZ-RL7 operates from 2.25V to 3.6V supplies. Ensure that both VDD1 and VDD2 are within this range and have sufficient current capability. The typical supply current is 0.6 mA per channel at 2 Mbps, so for 4 channels, the total current is about 2.4 mA per side. Use low-dropout regulators if the supply is noisy. The device has no enable pin, so power sequencing is not required, but ensure both supplies are stable before applying signals.
A common pitfall is exceeding the absolute maximum ratings, such as input voltage on VIA-VID or output current on VOA-VOD. Do not apply voltages outside the supply range to the input pins. Also, avoid exceeding the data rate of 2 Mbps, as this can cause timing errors. The default high output state means that if the input side is unpowered, the outputs will be high, which may be unexpected in some designs. Ensure that the system can handle this state during power-up or fault conditions.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in the provided data.
