ADUM1250ARZ - Hot Swappable Dual I2C Isolator | Analog Devices
MPN: ADUM1250ARZ ✓ فعالADUM1250ARZ نمای کلی
Digital isolators are components that transfer digital signals across an isolation barrier without a direct electrical connection, using capacitive, inductive, or optical coupling. They are essential in systems where safety, noise immunity, or ground potential differences require galvanic isolation. The ADUM1250ARZ uses Analog Devices' proprietary iCoupler chip-scale transformer technology, which offers advantages over traditional optocouplers, including higher data rates, lower power consumption, and better reliability.
Key features of the ADUM1250ARZ include nonlatching, bidirectional communication channels that are compatible with I2C interfaces, eliminating the need to split I2C signals into separate transmit and receive lines. It supports hot-swap capability, allowing insertion or removal of boards without powering down the system. The device also features open-drain outputs with 30mA current sink capability, ensuring compatibility with standard I2C bus specifications.
Technically, the ADUM1250ARZ provides two bidirectional channels, supporting a complete isolated I2C interface. It has a maximum data rate of 1Mbps, which is sufficient for standard and fast-mode I2C. The isolation barrier is rated at 2500Vrms, providing robust protection against voltage transients. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial environments.
Typical applications include isolated I2C buses in industrial automation, medical equipment, power management systems, and communication interfaces. The ADUM1250ARZ is also used in hot-swap applications where boards need to be replaced without interrupting system operation.
When designing with the ADUM1250ARZ, it is important to ensure proper decoupling of the power supply pins and to follow the recommended layout guidelines to maintain isolation performance. The device is RoHS compliant and available in tape and reel packaging.
جایگزین‌های drop-in برای ADUM1250ARZ — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ADUM1250ARZ (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Number of Channels, Package, Data Rate, Operating Temperature Range, Common-Mode Transient Immunity (CMTI).
ADUM1251ARZ
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ISO1540DR
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ISO1541DR
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
ADUM1281ARZ
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
ADUM1250ARZ مشخصات
| Isolation Voltage | 2500 Vrms |
| Number of Channels | 2 (bidirectional) |
| نرخ داده | 1 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Current Sink Capability | 30 mA |
| محدوده دمای کاری | -40°C to +125°C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
| نوع نصب | Surface Mount |
| وضعیت RoHS | Compliant |
| Hot-Swap Capable | Yes |
| I2C Compatibility | Side 2 I2C compliant, Side 1 I2C compatible |
پیکربندی پین ADUM1250ARZ
| پین 1 | VDD1 — Supply voltage side 1 |
| پین 2 | GND1 — Ground side 1 |
| پین 3 | SDA1 — Bidirectional data line side 1 |
| پین 4 | SCL1 — Bidirectional clock line side 1 |
| پین 5 | SCL2 — Bidirectional clock line side 2 |
| پین 6 | SDA2 — Bidirectional data line side 2 |
| پین 7 | GND2 — Ground side 2 |
| پین 8 | VDD2 — Supply voltage side 2 |
کاربردهای معمول
ADUM1250ARZ مناسب است برای 6 کاربردs: Industrial Automation, Medical Equipment, Power Management, Communication Interfaces, Hot-Swap Systems, Sensor Networks.
Industrial Automation
The ADUM1250ARZ provides galvanic isolation for I2C buses in industrial control systems, protecting against ground loops and voltage transients. Its 2500Vrms isolation and 25kV/µs CMTI ensure reliable communication in noisy factory environments. The hot-swap capability allows module replacement without system downtime, enhancing maintainability.
پیشنهادی
Medical Equipment
In medical devices, patient safety requires isolation between low-voltage control circuits and high-voltage sections. The ADUM1250ARZ's 2500Vrms isolation meets safety standards, while its 1Mbps data rate supports I2C sensors and monitors. The small SOIC package fits compact designs, and the wide temperature range ensures reliability in clinical environments.
پیشنهادی
Power Management
The ADUM1250ARZ isolates I2C communication between power management controllers and monitoring circuits, preventing noise from switching regulators from corrupting data. Its 3.0V to 5.5V supply range matches common power rails, and the hot-swap feature allows safe board insertion in live systems. The device's low propagation delay ensures timely control signals.
پیشنهادی
Communication Interfaces
The ADUM1250ARZ is used in isolated I2C interfaces for telecom and networking equipment, where ground potential differences can disrupt communication. Its bidirectional channels simplify design by eliminating the need for separate transmit/receive lines. The 1Mbps data rate supports fast-mode I2C, and the 25kV/µs CMTI ensures robust operation in high-EMI environments.
پیشنهادی
Hot-Swap Systems
The ADUM1250ARZ is specifically designed for hot-swap applications, allowing boards to be inserted or removed without powering down the system. Its nonlatching, bidirectional channels prevent bus lockups during insertion. The device's open-drain outputs with 30mA sink capability ensure compatibility with standard I2C bus specifications, making it ideal for redundant systems.
پیشنهادی
Sensor Networks
In distributed sensor networks, the ADUM1250ARZ isolates I2C buses connecting multiple sensors to a central controller, preventing ground loops and noise interference. Its 2500Vrms isolation protects sensitive sensors from voltage spikes. The wide operating temperature range and small package make it suitable for remote or embedded sensor nodes.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ADUM1250ARZ — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ADUM1251ARZ | ISO1540DR | ADUM1281ARZ |
|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Brand | Analog Devices | Analog Devices | Texas Instruments | Analog Devices |
| Isolation Voltage | 2500 Vrms | 2500 Vrms | 2500 Vrms | 2500 Vrms |
| Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| Number of Channels | 2 (bidirectional) | 1 bidirectional + 1 unidirectional | 2 (bidirectional) | 2 (bidirectional) |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Hot-Swap Capable | Yes | Yes | No | Yes |
تفاوت‌های کلیدی
- Hot-swap capability (در مقابلISO1540DR)
- Dual bidirectional channels (در مقابلADUM1251ARZ)
- iCoupler technology (در مقابلISO1540DR)
یادداشت‌های طراحی
Ensure both VDD1 and VDD2 are properly decoupled with 0.1µF capacitors placed close to the pins. The supply voltage range is 3.0V to 5.5V, and both sides can operate at different voltages if needed. Use low-ESR ceramic capacitors for optimal performance.
Maintain proper creepage and clearance distances between the two isolated sides on the PCB to meet safety standards. The SOIC package provides 2500Vrms isolation, but the PCB layout must not compromise this. Keep the isolation barrier clear of copper traces.
Do not exceed the maximum data rate of 1Mbps. The device is designed for I2C communication, and exceeding this rate may cause data errors. Also, ensure that the I2C bus pull-up resistors are sized correctly for the capacitance on each side.
اطلاعات انطباق
RoHS compliant per distributor listings. Other compliance data not specified in provided sources.
