ADUM4154BRIZ - 5kV SPI Digital Isolator | Analog Devices
MPN： ADUM4154BRIZ ✓ 啟用中ADUM4154BRIZ 概覽
A digital isolator is a component that provides galvanic isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is used to protect sensitive electronics from high voltages, ground loops, and noise, and is essential in industrial, medical, and automotive applications where safety and signal integrity are critical. Digital isolators are part of the broader category of interface ICs, which also includes transceivers, level shifters, and optocouplers.
Key features of the ADUM4154BRIZ include its 4-channel SPI isolation with support for multiple slaves, a data rate of 34 Mbps, and a wide supply voltage range of 3 V to 5.5 V. The device also features low propagation delay and jitter, ensuring reliable high-speed SPI communication. The iCoupler technology provides superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability.
The ADUM4154BRIZ is designed for use in industrial automation, motor control, and isolated SPI communication in data acquisition systems. Its high CMTI of 25 kV/µs makes it suitable for harsh environments with fast voltage transients. The device operates over a temperature range of -40°C to +125°C, making it suitable for industrial applications.
When designing with the ADUM4154BRIZ, it is important to ensure proper PCB layout to maintain isolation performance. The device requires careful attention to creepage and clearance distances, as well as proper decoupling of the power supply pins. The datasheet provides detailed guidelines for layout and application circuits.
直接替換替代品，適用於 ADUM4154BRIZ — 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： ADUM4154BRIZ （相同外形與佔位） — 差異在於 Number of Channels, Data Rate, SPI Clock Rate, Isolation Voltage, Package.
ADUM4154BRIZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
ISO7741DW
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
ADUM4154BRIZ 規格
| Isolation Voltage | 5000 Vrms |
| Number of Channels | 7 (4 forward, 3 reverse) |
| 資料速率 | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns (typical) |
| 供應電壓 | 3 V to 5.5 V |
| SPI Clock Rate | 17 MHz (max) |
| 封裝 | 20-SOIC (0.295", 7.50mm Width) |
| 工作溫度 | -40°C to +125°C |
| 安裝類型 | Surface Mount |
| Technology | iCoupler |
| 腳位數 | 20 |
| RoHS 狀態 | Compliant |
| Qualification | Industrial |
ADUM4154BRIZ 腳位配置
| 腳位 1 | VDD1 — Primary side supply voltage |
| 腳位 2 | GND1 — Primary side ground |
| 腳位 3 | CLK — SPI clock input |
| 腳位 4 | MO/SI — Master out, slave in data |
| 腳位 5 | MI/SO — Master in, slave out data |
| 腳位 6 | SS — Slave select input |
| 腳位 7 | ADDR0 — Address bit 0 |
| 腳位 8 | ADDR1 — Address bit 1 |
| 腳位 9 | GND1 — Primary side ground |
| 腳位 10 | VDD1 — Primary side supply voltage |
| 腳位 11 | VDD2 — Secondary side supply voltage |
| 腳位 12 | GND2 — Secondary side ground |
| 腳位 13 | SS1 — Slave select output 1 |
| 腳位 14 | SS2 — Slave select output 2 |
| 腳位 15 | SS3 — Slave select output 3 |
| 腳位 16 | SS4 — Slave select output 4 |
| 腳位 17 | GND2 — Secondary side ground |
| 腳位 18 | VDD2 — Secondary side supply voltage |
| 腳位 19 | NC — No connect |
| 腳位 20 | NC — No connect |
典型應用
ADUM4154BRIZ 適用於 6 應用s: Industrial Automation, Medical Equipment, Motor Control, Data Acquisition Systems, Isolated SPI for Sensors, Power Inverters.
Industrial Automation
The ADUM4154BRIZ provides isolated SPI communication between PLCs and remote I/O modules. Its 5 kV isolation and 25 kV/µs CMTI ensure reliable operation in noisy industrial environments. The 17 MHz SPI clock rate supports high-speed data transfer, while the low propagation delay minimizes latency in control loops. The device's wide supply voltage range (3 V to 5.5 V) allows integration with various logic levels. In motor drives, the isolator protects the controller from high-voltage transients, and its high CMTI prevents false triggering. The 20-SOIC package is suitable for compact PCB designs, and the industrial temperature range (-40°C to +125°C) ensures operation in harsh conditions.
推薦
Medical Equipment
In medical devices, the ADUM4154BRIZ provides galvanic isolation for patient safety. Its 5 kV isolation rating meets stringent safety standards, protecting patients and operators from electric shock. The device's low propagation delay and jitter ensure accurate data transmission in diagnostic equipment. The high CMTI of 25 kV/µs prevents interference from electrosurgical units and other high-voltage sources. The isolator is used in patient monitoring systems, where it isolates the analog front-end from the digital processing unit. Its wide supply voltage range allows compatibility with battery-powered devices. The 20-SOIC package is suitable for space-constrained medical devices, and the industrial temperature range ensures reliable operation in clinical environments.
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Motor Control
The ADUM4154BRIZ is ideal for isolated SPI communication in motor control systems. It isolates the microcontroller from the gate driver and power stage, preventing damage from high-voltage transients. The 5 kV isolation rating and 25 kV/µs CMTI ensure reliable operation in the presence of fast switching voltages. The 17 MHz SPI clock rate supports high-speed communication with encoders and other peripherals. The device's low propagation delay ensures real-time control, while the wide supply voltage range allows integration with 3.3 V or 5 V logic. The 20-SOIC package is suitable for industrial motor drives, and the industrial temperature range ensures operation in harsh environments. The isolator also provides protection against ground loops and noise.
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Data Acquisition Systems
In data acquisition systems, the ADUM4154BRIZ provides isolated SPI communication between the ADC and the host controller. Its 5 kV isolation rating protects the sensitive analog circuitry from digital noise and ground loops. The 17 MHz SPI clock rate supports high-speed data transfer, while the low propagation delay ensures accurate timing. The device's high CMTI of 25 kV/µs prevents interference from switching power supplies. The isolator is used in industrial data loggers, where it isolates the sensor interface from the processing unit. Its wide supply voltage range allows compatibility with various logic levels. The 20-SOIC package is suitable for compact designs, and the industrial temperature range ensures reliable operation in field environments.
推薦
Isolated SPI for Sensors
The ADUM4154BRIZ enables isolated SPI communication with remote sensors in industrial and automotive applications. Its 5 kV isolation rating protects the sensor interface from high-voltage transients and ground potential differences. The 17 MHz SPI clock rate supports high-speed sensor data transfer, while the low propagation delay ensures real-time monitoring. The device's high CMTI of 25 kV/µs prevents false triggering in noisy environments. The isolator is used in temperature, pressure, and flow sensors, where it isolates the sensor from the controller. Its wide supply voltage range allows compatibility with battery-powered sensors. The 20-SOIC package is suitable for compact sensor modules, and the industrial temperature range ensures operation in harsh conditions.
推薦
Power Inverters
In power inverters, the ADUM4154BRIZ provides isolated SPI communication between the control board and the power stage. Its 5 kV isolation rating protects the controller from high-voltage DC bus transients. The 25 kV/µs CMTI ensures reliable operation in the presence of fast switching voltages. The 17 MHz SPI clock rate supports high-speed communication with gate drivers and monitoring circuits. The device's low propagation delay ensures real-time control, while the wide supply voltage range allows integration with various logic levels. The 20-SOIC package is suitable for compact inverter designs, and the industrial temperature range ensures operation in high-temperature environments. The isolator also provides protection against ground loops and electromagnetic interference.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM4154BRIZ — 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 | ADUM4154BRIZ-RL | ADUM4154ARIZ | ADUM3154BRSZ | ISO7741DW |
|---|---|---|---|---|---|
| Package | 20-SOIC (0.295", 7.50mm Width) | 20-SOIC (0.295", 7.50mm Width) - same | 20-SSOP (0.209", 5.30mm Width) | 20-SSOP (0.209", 5.30mm Width) | 20-SOIC (0.295", 7.50mm Width) - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 5000 Vrms | 5000 Vrms | 5000 Vrms | 2500 Vrms | 5000 Vrms |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps | 100 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V | 2.25 V to 5.5 V |
| SPI Support | Yes (up to 4 slaves) | Yes (up to 4 slaves) | Yes (up to 4 slaves) | Yes (up to 4 slaves) | No (general purpose) |
| Propagation Delay | 14 ns (typical) | 14 ns (typical) | 14 ns (typical) | 14 ns (typical) | 10.7 ns (typical) |
主要差異化特點
- SPI-specific isolation with multiple slave support (對比ISO7741DW)
- Higher isolation voltage than ADUM3154BRSZ (對比ADUM3154BRSZ)
- Wider package for better thermal performance (對比ADUM4154ARIZ)
設計說明
For the ADUM4154BRIZ, maintain proper creepage and clearance distances on the PCB to meet the 5 kV isolation rating. The datasheet recommends a minimum creepage of 8 mm for reinforced insulation. Ensure the isolation barrier is free of copper traces and components to prevent voltage breakdown. Use a slot or cutout under the device to increase the creepage distance if needed.
Decouple the VDD1 and VDD2 pins with 0.1 µF ceramic capacitors placed as close to the pins as possible. Additionally, use a 10 µF bulk capacitor on each supply rail to handle transient currents. The ADUM4154BRIZ operates from 3 V to 5.5 V, so ensure the supply voltages are within this range and have low ripple to maintain signal integrity.
Route the SPI signals (CLK, MO/SI, MI/SO, SS) with controlled impedance and keep them as short as possible to minimize propagation delay and crosstalk. The ADUM4154BRIZ supports SPI clock rates up to 17 MHz, so signal integrity is critical. Avoid routing these signals near high-voltage or high-current traces to prevent noise coupling.
合規資訊
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified; industrial grade.
