ADUM3151BRSZ-RL7 - 7-Ch SPI Isolator 3.75kV | Analog Devices
MPN： ADUM3151BRSZ-RL7 ✓ 啟用中ADUM3151BRSZ-RL7 概覽
A digital isolator is a component that provides electrical isolation between two circuits while allowing digital signals to pass. It uses capacitive, inductive, or optical coupling to transfer data without a direct electrical connection, protecting sensitive electronics from high voltages, ground loops, and noise. Digital isolators are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical.
Key features include 7 channels with 5/2 input/output directionality, support for SPI clock rates up to 17 MHz, and low propagation delay of 14 ns on the CLK, MO/SI, MI/SO, and SS lines. The device also includes three auxiliary channels for non-timing-critical signals, and it operates from a 3.3V or 5V supply. The SSOP package is compact and suitable for space-constrained designs.
The ADUM3151 uses iCoupler technology, which integrates micro-transformers on-chip to achieve isolation. This approach offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The device is designed to meet stringent isolation standards, ensuring robust performance in harsh environments.
Typical applications include isolated SPI interfaces in industrial motor control, isolated sensor data acquisition, and isolated communication in medical devices. The high CMTI and low propagation delay make it ideal for systems requiring precise timing and noise immunity.
When designing with this device, ensure proper PCB layout with adequate creepage and clearance distances for the isolation barrier. Also, place decoupling capacitors close to the power pins to minimize noise.
直接替換替代品，適用於 ADUM3151BRSZ-RL7 — 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： ADUM3151BRSZ-RL7 （相同外形與佔位） — 差異在於 Number of Channels, Technology, Data Rate, Supply Voltage.
ADUM3151BRSZ
✅ 直接替換聯絡詢價
查看資料表 →ADUM3150BRSZ-RL7
✅ 直接替換聯絡詢價
查看資料表 →ADUM3153BRSZ-RL7
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADUM240E0BRIZ
✅ 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）
ADUM3151BRSZ-RL7 規格
| Technology | iCoupler (Magnetic Coupling) |
| Number of Channels | 7 |
| Inputs - Side 1/Side 2 | 5/2 |
| Isolation Voltage | 3750 Vrms |
| 資料速率 | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| SPI Clock Rate | 17 MHz |
| 供應電壓 | 3.3V or 5V |
| 封裝 | 20-SSOP (0.209", 5.30mm Width) |
| 工作溫度 | -40°C to +125°C |
| 安裝類型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS 狀態 | Compliant |
| Isolated Power | No |
ADUM3151BRSZ-RL7 腳位配置
| 腳位 1 | VDD1 — Supply voltage side 1 |
| 腳位 2 | GND1 — Ground side 1 |
| 腳位 3 | CLK — SPI clock input |
| 腳位 4 | MO/SI — Master out/slave in |
| 腳位 5 | MI/SO — Master in/slave out |
| 腳位 6 | SS — Slave select |
| 腳位 7 | AUX1 — Auxiliary channel 1 |
| 腳位 8 | AUX2 — Auxiliary channel 2 |
| 腳位 9 | AUX3 — Auxiliary channel 3 |
| 腳位 10 | GND1 — Ground side 1 |
| 腳位 11 | VDD2 — Supply voltage side 2 |
| 腳位 12 | GND2 — Ground side 2 |
| 腳位 13 | AUX4 — Auxiliary channel 4 |
| 腳位 14 | AUX5 — Auxiliary channel 5 |
| 腳位 15 | AUX6 — Auxiliary channel 6 |
| 腳位 16 | AUX7 — Auxiliary channel 7 |
| 腳位 17 | GND2 — Ground side 2 |
| 腳位 18 | VDD2 — Supply voltage side 2 |
| 腳位 19 | NC — No connect |
| 腳位 20 | NC — No connect |
典型應用
ADUM3151BRSZ-RL7 適用於 6 應用s: Isolated SPI Interface, Industrial Motor Control, Medical Equipment, Isolated Sensor Data Acquisition, Communication Systems, Test and Measurement.
Isolated SPI Interface
The ADUM3151BRSZ-RL7 is optimized for isolated SPI communication, providing 7 channels with low propagation delay (14 ns) and support for SPI clock rates up to 17 MHz. It ensures reliable data transfer across isolation barriers in systems like motor control and industrial automation, where ground loops and noise can corrupt signals. The high CMTI of 25 kV/µs prevents false triggering in noisy environments.
推薦
Industrial Motor Control
In motor control systems, the ADUM3151BRSZ-RL7 isolates the microcontroller from high-voltage power stages. Its 3.75 kVrms isolation and 25 kV/µs CMTI ensure safe and reliable operation in harsh industrial environments. The low propagation delay maintains precise timing for PWM signals, while the 7-channel configuration supports multiple SPI signals and auxiliary functions.
推薦
Medical Equipment
The ADUM3151BRSZ-RL7 provides galvanic isolation for patient-connected medical devices, ensuring safety and preventing leakage currents. Its 3.75 kVrms isolation meets stringent medical standards, while the high data rate supports fast SPI communication with sensors and ADCs. The compact SSOP package is ideal for space-constrained medical instruments.
推薦
Isolated Sensor Data Acquisition
For isolated sensor interfaces, the ADUM3151BRSZ-RL7 transmits SPI data from sensors to a controller across an isolation barrier. Its low propagation delay and high CMTI ensure accurate and reliable data acquisition in noisy industrial settings. The 7 channels allow for multiple sensor signals and control lines, simplifying system design.
推薦
Communication Systems
In communication systems, the ADUM3151BRSZ-RL7 isolates SPI interfaces between baseband processors and RF front-ends. Its high data rate (34 Mbps) and low propagation delay (14 ns) support high-speed control signaling, while the 3.75 kVrms isolation protects against ground potential differences. The device is suitable for both wired and wireless communication infrastructure.
推薦
Test and Measurement
The ADUM3151BRSZ-RL7 is used in test and measurement equipment to isolate digital control signals from sensitive analog front-ends. Its high CMTI and low propagation delay ensure accurate timing and noise immunity, critical for precise measurements. The 7-channel configuration provides flexibility for various signal routing needs.
推薦
推薦產品摘要
工程參考資料，適用於 ADUM3151BRSZ-RL7 — 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 | ADUM3151BRSZ | ADUM3150BRSZ-RL7 | ADUM3153BRSZ-RL7 | ADUM240E0BRIZ | ISO7741DW |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Number of Channels | 7 | 7 | 7 | 7 | 4 | 4 |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 5000 Vrms | 5000 Vrms |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps | 150 Mbps | 100 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs | 100 kV/µs |
| Propagation Delay | 14 ns | 14 ns | 14 ns | 14 ns | 13 ns | 10.7 ns |
| SPI Optimized | Yes | Yes | Yes | Yes | No | No |
主要差異化特點
- SPI-optimized with 7 channels (對比ADUM240E0BRIZ)
- High CMTI of 25 kV/µs (對比ISO7741DW)
- Low propagation delay of 14 ns (對比ADUM3150BRSZ-RL7)
設計說明
Ensure proper creepage and clearance distances on the PCB for the isolation barrier. The ADUM3151BRSZ-RL7 provides 3.75 kVrms isolation, so maintain at least 8 mm creepage for reinforced insulation per IPC-2221. Place the device with a clear slot or gap under the isolation barrier to prevent surface leakage.
Decouple both supply pins (VDD1 and VDD2) with 0.1 µF ceramic capacitors placed as close as possible to the pins. Additionally, use a 10 µF bulk capacitor on each side if the supply is shared with other components. This minimizes noise and ensures stable operation at high data rates.
Keep the SPI signal traces short and matched in length to minimize skew. The ADUM3151BRSZ-RL7 has a propagation delay of 14 ns, so trace length differences can cause timing errors at high clock rates. Use ground planes on both sides of the isolation barrier to reduce EMI.
合規資訊
RoHS compliance confirmed by distributor listings. Other compliance data not explicitly stated in the provided data.