ADUM3154BRSZ - 3.75kV SPI Digital Isolator | Analog Devices
MPN： ADUM3154BRSZ ✓ 啟用中ADUM3154BRSZ 概覽
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass across the isolation barrier. It is essential in applications where ground potential differences, noise, or safety requirements demand galvanic separation. The ADUM3154BRSZ uses Analog Devices' iCoupler chip-scale transformer technology, which offers advantages over optocouplers in terms of speed, power consumption, and reliability.
Key features include a common-mode transient immunity (CMTI) of 25 kV/µs, low propagation delay and jitter, and support for up to four slave devices. The device integrates multiple isolation channels for SPI signals (CLK, MO/SI, MI/SO, SS) and additional control channels, simplifying system design. It operates from two supply voltages: VDD1 (3.0V to 3.6V) and VDD2 (4.5V to 5.5V), allowing level shifting between different logic domains.
The ADUM3154BRSZ is part of the ADuM315x family, which includes variants with different channel configurations and isolation ratings. The device is production-ready and available in tape and reel packaging. It is RoHS compliant and suitable for industrial, medical, and communication applications where reliable isolation is critical.
Typical applications include isolated SPI interfaces in motor control, data acquisition systems, and industrial automation. The device's high CMTI ensures reliable operation in noisy environments, and its low propagation delay supports high-speed SPI communication. When designing with this device, proper PCB layout is essential to maintain isolation performance and minimize coupling between the two sides.
直接替換替代品，適用於 ADUM3154BRSZ — 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： ADUM3154BRSZ （相同外形與佔位） — 差異在於 Number of Channels, Package, Isolation Voltage, Isolation Type, RoHS Status.
ADUM3154BRIZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM3154ARIZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM3154BRSZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →ADUM3154ARSZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM3154BRIZ-RL
✅ 直接替換📋 參考替代品（不在目錄中）
ADUM3154BRSZ 規格
| Number of Channels | 7 |
| Isolation Voltage | 3750 Vrms |
| 資料速率 | 34 Mbps |
| CMTI | 25 kV/µs |
| Supply Voltage VDD1 | 3.0 V to 3.6 V |
| Supply Voltage VDD2 | 4.5 V to 5.5 V |
| 工作溫度 | -40°C to +125°C |
| 封裝 | 20-SSOP (0.209", 5.30mm Width) |
| 安裝類型 | Surface Mount |
| Technology | iCoupler |
| SPI Clock Rate | 17 MHz |
| Number of Slaves Supported | 4 |
| RoHS 狀態 | Compliant |
| Isolation Type | Magnetic Coupling |
ADUM3154BRSZ 腳位配置
| 腳位 1 | VDD1 — Primary supply voltage (3.0V to 3.6V) |
| 腳位 2 | GND1 — Primary 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 | SS1 — Slave select 1 |
| 腳位 7 | SS2 — Slave select 2 |
| 腳位 8 | SS3 — Slave select 3 |
| 腳位 9 | SS4 — Slave select 4 |
| 腳位 10 | GND1 — Primary ground |
| 腳位 11 | GND2 — Secondary ground |
| 腳位 12 | VDD2 — Secondary supply voltage (4.5V to 5.5V) |
| 腳位 13 | SS4 — Slave select 4 (isolated side) |
| 腳位 14 | SS3 — Slave select 3 (isolated side) |
| 腳位 15 | SS2 — Slave select 2 (isolated side) |
| 腳位 16 | SS1 — Slave select 1 (isolated side) |
| 腳位 17 | MI/SO — Master in, slave out data (isolated side) |
| 腳位 18 | MO/SI — Master out, slave in data (isolated side) |
| 腳位 19 | CLK — SPI clock (isolated side) |
| 腳位 20 | GND2 — Secondary ground |
典型應用
ADUM3154BRSZ 適用於 6 應用s: Industrial Motor Control, Data Acquisition Systems, Isolated SPI for Medical Devices, Isolated Communication in Renewable Energy, Isolated SPI in Automotive Electronics, Isolated SPI in Test and Measurement.
Industrial Motor Control
The ADUM3154BRSZ provides galvanic isolation for SPI communication between a microcontroller and motor driver ICs in industrial drives. Its 3750 Vrms isolation and 25 kV/µs CMTI ensure reliable operation in noisy environments with high voltage transients. The 34 Mbps data rate supports high-speed SPI for real-time control loops, while the 7 channels accommodate multiple SPI signals and control lines. This isolator helps prevent ground loops and protects low-voltage logic from high-voltage motor supplies, enhancing system safety and reliability.
推薦
Data Acquisition Systems
In data acquisition systems, the ADUM3154BRSZ isolates the SPI bus between an ADC and a host controller, preventing noise from sensors and actuators from corrupting digital signals. Its low propagation delay and jitter maintain signal integrity at high data rates, ensuring accurate data transfer. The 7-channel configuration allows isolation of multiple SPI signals and control lines, simplifying system design. The wide operating temperature range (-40°C to +125°C) makes it suitable for harsh industrial environments.
推薦
Isolated SPI for Medical Devices
The ADUM3154BRSZ is ideal for medical devices requiring galvanic isolation for patient safety. Its 3750 Vrms isolation meets stringent safety standards, while the high data rate supports fast SPI communication for real-time monitoring. The low power consumption and small SSOP package make it suitable for portable medical equipment. The device's high CMTI ensures reliable operation in the presence of electromagnetic interference from other medical equipment.
推薦
Isolated Communication in Renewable Energy
In solar inverters and wind turbine controllers, the ADUM3154BRSZ isolates SPI communication between power management ICs and control processors. Its high isolation voltage protects against high-voltage transients from the power stage, while the 34 Mbps data rate enables fast communication for maximum power point tracking. The device's wide temperature range and high CMTI ensure reliable operation in outdoor environments with extreme temperatures and electrical noise.
推薦
Isolated SPI in Automotive Electronics
The ADUM3154BRSZ is suitable for automotive applications such as battery management systems and motor drives, where galvanic isolation is required for safety and noise immunity. Its 3750 Vrms isolation and 25 kV/µs CMTI meet automotive requirements for robustness. The device operates over -40°C to +125°C, covering the automotive temperature range. The 7-channel configuration allows isolation of multiple SPI signals, reducing component count and board space.
推薦
Isolated SPI in Test and Measurement
In test and measurement equipment, the ADUM3154BRSZ isolates SPI communication between measurement front-ends and digital processors, preventing ground loops and reducing noise. Its high data rate and low jitter ensure accurate timing for synchronized measurements. The device's small SSOP package is ideal for compact instruments. The wide operating temperature range and high CMTI make it suitable for benchtop and portable test equipment.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM3154BRSZ — 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 | ADUM3154BRIZ | ADUM3154ARIZ | ADUM3154BRSZ-RL7 | ADUM3154ARSZ |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SOIC-W | 20-SOIC-W | 20-SSOP | 20-SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 2500 Vrms |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Number of Channels | 7 | 7 | 7 | 7 | 7 |
| Supply Voltage VDD1 | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| Supply Voltage VDD2 | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
主要差異化特點
- High CMTI of 25 kV/µs (對比ADUM3154ARSZ)
- 7-channel configuration (對比ISO7742DW)
- Small SSOP package (對比ADUM3154BRIZ)
設計說明
For optimal isolation performance, maintain a clearance of at least 8 mm between the primary and secondary sides of the PCB. Use a solid ground plane on each side, but do not connect the grounds together except through the isolator. Place decoupling capacitors (0.1 µF) close to each VDD pin to minimize noise.
Keep the SPI signal traces as short as possible and avoid routing them near high-voltage or high-current traces. Use differential routing for CLK and data lines if possible to reduce EMI. Ensure that the isolation barrier is not bridged by any copper traces or components.
Do not exceed the absolute maximum ratings for VDD1 and VDD2. Ensure that the input signals do not exceed the supply voltages. Also, avoid applying signals to the isolated side before VDD2 is powered, as this can cause latch-up. Refer to the datasheet for proper power-up sequencing.
合規資訊
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided sources.