ADUM3151BRSZ-RL7 - 7-Ch SPI Isolator 3.75kV | Analog Devices
料号： ADUM3151BRSZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $10.48 | $10.48 |
| 10 | $9.85 | $98.50 |
| 100 | $8.92 | $892.00 |
| 500 | $8.1 | $4,050.00 |
| 1,000 | $7.45 | $7,450.00 |
ADUM3151BRSZ-RL7 概述
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.
直接替换替代料： ADUM3151BRSZ-RL7 ——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： ADUM3151BRSZ-RL7 （相同外形与封装尺寸） ——差异在于 Number of Channels, Technology, Data Rate, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
ADUM3151BRSZ
✅ 直接替换✓ 有现货
$7.8 / 个
查看数据手册 →ADUM3150BRSZ-RL7
✅ 直接替换✓ 有现货
$5.9 / 个
查看数据手册 →ADUM3153BRSZ-RL7
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.1 / 个
查看数据手册 →ADUM240E0BRIZ
✅ 直接替换📋 参考替代料（不在目录中）
ISO7741DW
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADUM3151BRSZ-RL7 规格参数
| Technology | iCoupler (Magnetic Coupling) |
| Number of Channels | 7 |
| Inputs - Side 1/Side 2 | 5/2 |
| Isolation Voltage | 3750 Vrms |
| 数据速率 | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| SPI Clock Rate | 17 MHz |
| 电源电压 | 3.3V or 5V |
| 封装 | 20-SSOP (0.209", 5.30mm Width) |
| 工作温度 | -40°C to +125°C |
| 安装类型 | Surface Mount |
| Packaging | Tape & Reel (TR) |
| RoHS 状态 | Compliant |
| Isolated Power | No |
ADUM3151BRSZ-RL7 引脚配置
| 引脚 1 | VDD1 — Supply voltage side 1 |
| 引脚 2 | GND1 — Ground side 1 |
| 引脚 3 | CLK — SPI clock input |
| 引脚 4 | MO/SI — Master out/slave in |
| 引脚 5 | MI/SO — Master in/slave out |
| 引脚 6 | SS — Slave select |
| 引脚 7 | AUX1 — Auxiliary channel 1 |
| 引脚 8 | AUX2 — Auxiliary channel 2 |
| 引脚 9 | AUX3 — Auxiliary channel 3 |
| 引脚 10 | GND1 — Ground side 1 |
| 引脚 11 | VDD2 — Supply voltage side 2 |
| 引脚 12 | GND2 — Ground side 2 |
| 引脚 13 | AUX4 — Auxiliary channel 4 |
| 引脚 14 | AUX5 — Auxiliary channel 5 |
| 引脚 15 | AUX6 — Auxiliary channel 6 |
| 引脚 16 | AUX7 — Auxiliary channel 7 |
| 引脚 17 | GND2 — Ground side 2 |
| 引脚 18 | VDD2 — Supply voltage side 2 |
| 引脚 19 | NC — No connect |
| 引脚 20 | NC — No connect |
典型应用
ADUM3151BRSZ-RL7 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： ADUM3151BRSZ-RL7 ——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 | 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 |
关键差异点
- SPI-optimized with 7 channels （对比 ADUM240E0BRIZ)
- High CMTI of 25 kV/µs （对比 ISO7741DW)
- Low propagation delay of 14 ns （对比 ADUM3150BRSZ-RL7)
设计说明
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.
合规信息
RoHS compliance confirmed by distributor listings. Other compliance data not explicitly stated in the provided data.