ADUM4154ARIZ - 5kV SPI Digital Isolator | Analog Devices
料号： ADUM4154ARIZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
ADUM4154ARIZ 概述
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.
直接替换替代料： ADUM4154ARIZ ——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： ADUM4154ARIZ （相同外形与封装尺寸） ——差异在于 Number of Channels, Isolation Voltage, Package, Data Rate, SPI Clock Rate.
快速对比工具——选择替代料号进行并排对比：
ADUM4154BRIZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.16 / 个
查看数据手册 →ADUM3154ARSZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.18 / 个
查看数据手册 →ADUM3154BRSZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.1 / 个
查看数据手册 →ADUM4154ARIZ 规格参数
| Number of Channels | 4 |
| Isolation Voltage | 5000 Vrms |
| 数据速率 | 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 |
| 工作温度 | -40°C to +125°C |
| 封装 | 20-SOIC (0.295", 7.50mm Width) |
| 安装类型 | Surface Mount |
| Technology | iCoupler |
| Number of Slave Devices Supported | 4 |
| Address Pins | 2 |
| RoHS 状态 | Compliant |
ADUM4154ARIZ 引脚配置
| 引脚 1 | VDD1 — Primary supply voltage (4.5V to 5.5V) |
| 引脚 2 | GND1 — Primary ground |
| 引脚 3 | CLK — SPI clock input |
| 引脚 4 | MO/SI — Master out, slave in data |
| 引脚 5 | MI/SO — Master in, slave out data |
| 引脚 6 | SS1 — Slave select 1 |
| 引脚 7 | SS2 — Slave select 2 |
| 引脚 8 | SS3 — Slave select 3 |
| 引脚 9 | SS4 — Slave select 4 |
| 引脚 10 | ADDR0 — Address pin 0 |
| 引脚 11 | ADDR1 — Address pin 1 |
| 引脚 12 | GND2 — Secondary ground |
| 引脚 13 | VDD2 — Secondary supply voltage (3.0V to 3.6V) |
| 引脚 14 | EN — Enable pin (active high) |
| 引脚 15 | NC — No connect |
| 引脚 16 | NC — No connect |
| 引脚 17 | NC — No connect |
| 引脚 18 | NC — No connect |
| 引脚 19 | NC — No connect |
| 引脚 20 | NC — No connect |
典型应用
ADUM4154ARIZ 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
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推荐产品汇总
工程参考数据： ADUM4154ARIZ ——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 | 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 |
关键差异点
- Supports up to four SPI slave devices （对比 ADUM3154ARSZ)
- High CMTI of 25 kV/µs （对比 ISO7741DW)
- SPI-optimized with integrated slave select routing （对比 Si8641BB-B-IS1)
设计说明
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.
合规信息
RoHS compliant per Analog Devices product page. No AEC-Q100 qualification indicated.
