ADUM1440ARWZ-RL7 - 4-Ch Digital Isolator 2Mbps | Analog Devices
MPN: ADUM1440ARWZ-RL7 ✓ Hoạt độngADUM1440ARWZ-RL7 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADUM1440ARWZ-RL7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADUM1440ARWZ-RL7 (cùng hình factor và footprint) — khác nhau ở Package, Supply Voltage (VDD1/VDD2), Default Output State, Isolation Voltage, Channel Directionality.
ADUM1441ARWZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM1442ARWZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM1445ARWZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM1446ARWZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM1447ARWZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM1400ARWZ
⚡ Đồng góiLiên hệ để biết giá
Xem tài liệu →ADUM1440ARWZ-RL7 Thông số kỹ thuật
| Number of Channels | 4 |
| Channel Directionality | 4/0 (all forward) |
| Default Output State | High |
| Isolation Voltage | 2500 Vrms |
| Tốc độ dữ liệu | 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 |
| Khoảng nhiệt độ hoạt động | -40°C to +125°C |
| Hộp | 16-SOIC-W (0.300" width) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
| Technology | iCoupler |
Cấu hình chân ADUM1440ARWZ-RL7
| Chân 1 | VDD1 — Supply voltage for side 1 |
| Chân 2 | GND1 — Ground for side 1 |
| Chân 3 | VIA — Input channel A |
| Chân 4 | VIB — Input channel B |
| Chân 5 | VIC — Input channel C |
| Chân 6 | VID — Input channel D |
| Chân 7 | GND1 — Ground for side 1 |
| Chân 8 | NC — No connect |
| Chân 9 | VOD — Output channel D |
| Chân 10 | VOC — Output channel C |
| Chân 11 | VOB — Output channel B |
| Chân 12 | VOA — Output channel A |
| Chân 13 | GND2 — Ground for side 2 |
| Chân 14 | NC — No connect |
| Chân 15 | VDD2 — Supply voltage for side 2 |
| Chân 16 | GND2 — Ground for side 2 |
Ứng dụng tiêu biểu
ADUM1440ARWZ-RL7 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADUM1440ARWZ-RL7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Micropower consumption (vsADUM1400ARWZ)
- Default high output state (vsADUM1445ARWZ-RL7)
- 4/0 channel directionality (vsADUM1441ARWZ-RL7)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. REACH and conflict minerals status not specified in the provided data.
