ADUM4154ARIZ - 5kV SPI Digital Isolator | Analog Devices
MPN: ADUM4154ARIZ ✓ نشطADUM4154ARIZ نظرة عامة
A digital isolator is a device that transfers digital signals across an isolation barrier, providing galvanic isolation to protect sensitive circuitry from high voltages, ground loops, and noise. In the hierarchy of isolation components, a digital isolator falls under the category of isolation ICs, which are part of the broader power management and signal conditioning ICs. The ADUM4154ARIZ specifically targets SPI communication, a synchronous serial interface widely used in embedded systems to connect microcontrollers to sensors, ADCs, DACs, and other peripherals.
Key features of the ADUM4154ARIZ include support for up to four slave devices via two address pins, a 2 Mbps data rate (as listed by DigiKey, though the datasheet indicates 17 MHz SPI clock), and a high common-mode transient immunity (CMTI) of 25 kV/µs. The device operates with a supply voltage range of 4.5V to 5.5V on VDD1 and 3.0V to 3.6V on VDD2, allowing level shifting between different logic domains. The propagation delay is low, ensuring minimal skew in SPI timing.
Technically, the ADUM4154ARIZ uses iCoupler technology, which employs micro-transformers to transmit data across the isolation barrier. This approach provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability. The device also includes an enable pin for power management and a thermal shutdown feature for protection.
Typical applications include industrial automation, motor control, data acquisition systems, and any SPI-based system requiring isolation between a controller and peripheral devices. The high CMTI makes it suitable for noisy environments such as factory floors and power conversion systems.
When designing with the ADUM4154ARIZ, ensure proper PCB layout with adequate creepage and clearance distances for the 5kV isolation rating. Also, decouple both supply rails with 0.1µF capacitors close to the pins to minimize noise.
بدائل مباشرة لـ ADUM4154ARIZ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع ADUM4154ARIZ (نفس عامل الشكل والبصمة) — يختلف في Number of Channels, Isolation Voltage, Package, Data Rate, SPI Clock Rate.
ADUM4154BRIZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ADUM3154ARSZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ADUM3154BRSZ
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←ADUM4154ARIZ المواصفات
| Number of Channels | 4 |
| Isolation Voltage | 5000 Vrms |
| معدل البيانات | 2 Mbps (DigiKey) / 17 MHz SPI clock (datasheet) |
| CMTI | 25 kV/µs |
| Supply Voltage VDD1 | 4.5 V to 5.5 V |
| Supply Voltage VDD2 | 3.0 V to 3.6 V |
| درجة حرارة التشغيل | -40°C to +125°C |
| العلبة | 20-SOIC (0.295", 7.50mm Width) |
| نوع التركيب | Surface Mount |
| Technology | iCoupler |
| Number of Slave Devices Supported | 4 |
| Address Pins | 2 |
| حالة RoHS | Compliant |
تكوين أطراف ADUM4154ARIZ
| دبوس 1 | VDD1 — Primary supply voltage (4.5V to 5.5V) |
| دبوس 2 | GND1 — Primary ground |
| دبوس 3 | CLK — SPI clock input |
| دبوس 4 | MO/SI — Master out, slave in data |
| دبوس 5 | MI/SO — Master in, slave out data |
| دبوس 6 | SS1 — Slave select 1 |
| دبوس 7 | SS2 — Slave select 2 |
| دبوس 8 | SS3 — Slave select 3 |
| دبوس 9 | SS4 — Slave select 4 |
| دبوس 10 | ADDR0 — Address pin 0 |
| دبوس 11 | ADDR1 — Address pin 1 |
| دبوس 12 | GND2 — Secondary ground |
| دبوس 13 | VDD2 — Secondary supply voltage (3.0V to 3.6V) |
| دبوس 14 | EN — Enable pin (active high) |
| دبوس 15 | NC — No connect |
| دبوس 16 | NC — No connect |
| دبوس 17 | NC — No connect |
| دبوس 18 | NC — No connect |
| دبوس 19 | NC — No connect |
| دبوس 20 | NC — No connect |
التطبيقات النموذجية
ADUM4154ARIZ مناسب لـ 6 التطبيقs: Industrial Automation, Motor Control, Data Acquisition Systems, Medical Equipment, Renewable Energy Systems, Test and Measurement.
Industrial Automation
The ADUM4154ARIZ provides galvanic isolation for SPI communication between PLCs, sensors, and actuators in industrial environments. Its 5kV isolation and 25kV/µs CMTI ensure reliable operation in the presence of motor noise and ground loops. The 17MHz SPI clock supports high-speed data acquisition, while the four slave select lines enable connection of multiple sensors to a single controller. The wide temperature range (-40°C to +125°C) suits harsh factory floors.
موصى به
Motor Control
In motor control systems, the ADUM4154ARIZ isolates the SPI interface between the microcontroller and gate drivers or encoder interfaces. The high CMTI (25kV/µs) prevents false triggering from fast voltage transients generated by PWM switching. The 5kV isolation protects low-voltage control circuitry from high-voltage motor drives. The low propagation delay ensures accurate timing for real-time control loops, and the four slave select lines allow connection of multiple encoders or current sensors.
موصى به
Data Acquisition Systems
The ADUM4154ARIZ is ideal for data acquisition systems requiring isolation between analog front-ends and digital controllers. It supports SPI clock rates up to 17MHz, enabling high-throughput sampling from ADCs and DACs. The four slave select lines allow multiple converters to share a single SPI bus, reducing pin count. The 5kV isolation ensures safety in medical and industrial monitoring equipment, while the low jitter maintains signal integrity for precise measurements.
موصى به
Medical Equipment
In medical devices, the ADUM4154ARIZ provides patient isolation for SPI-based sensors and monitors. The 5kV isolation meets safety standards for patient-connected equipment, preventing leakage currents. The low power consumption and small SOIC-20 package make it suitable for portable devices. The wide temperature range and high reliability of iCoupler technology ensure long-term operation in critical care environments.
موصى به
Renewable Energy Systems
The ADUM4154ARIZ is used in solar inverters and wind turbine controllers to isolate SPI communication between the main controller and power stage monitoring circuits. The high CMTI (25kV/µs) ensures reliable operation in the presence of high-voltage switching transients. The 5kV isolation protects low-voltage control electronics from high-voltage DC buses. The four slave select lines enable connection of multiple voltage and current sensors for comprehensive system monitoring.
موصى به
Test and Measurement
In test and measurement equipment, the ADUM4154ARIZ isolates SPI interfaces between measurement front-ends and digital processors. The 17MHz SPI clock supports high-speed data transfer for oscilloscopes and data loggers. The low propagation delay and jitter ensure accurate timing for synchronized measurements. The 5kV isolation protects sensitive measurement circuits from ground loops and noise, improving measurement accuracy.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ ADUM4154ARIZ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | ADUM4154BRIZ | ADUM3154ARSZ | ADUM3154BRSZ | ISO7741DW | Si8641BB-B-IS1 |
|---|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (same) | 20-SOIC (same) | 20-SOIC (same) | SOIC-16 (different) | SOIC-16 (different) |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Skyworks Solutions |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Number of Channels | 4 | 4 | 4 | 4 | 4 | 4 |
| Data Rate | 2 Mbps (DigiKey) / 17 MHz SPI clock | 2 Mbps / 17 MHz | 2 Mbps / 17 MHz | 2 Mbps / 17 MHz | 100 Mbps | 150 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 50 kV/µs |
| Number of Slave Devices | 4 | 4 | 2 | 2 | N/A (not SPI-specific) | N/A (not SPI-specific) |
| Supply Voltage VDD1 | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 2.25V to 5.5V | 2.5V to 5.5V |
أبرز الفروقات
- Supports up to four SPI slave devices (مقابلADUM3154ARSZ)
- High CMTI of 25 kV/µs (مقابلISO7741DW)
- SPI-optimized with integrated slave select routing (مقابلSi8641BB-B-IS1)
ملاحظات التصميم
For 5kV isolation, ensure adequate creepage and clearance distances on the PCB. The SOIC-20 package has a minimum creepage of 8mm, but for reinforced isolation, maintain at least 8mm between primary and secondary sides. Use a slot or cutout under the isolator to increase creepage distance.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10µF bulk capacitor on each supply if the power source is far. This ensures stable operation and reduces noise coupling across the isolation barrier.
Do not exceed the absolute maximum ratings for supply voltages. Ensure that the voltage differential between any two pins does not exceed the isolation rating. Also, avoid floating the enable pin; tie it to VDD1 or VDD2 as appropriate to ensure the device is always enabled or disabled as intended.
معلومات الامتثال
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
