ADUM3155BRSZ-RL7 - 7-Channel SPI Isolator 3750Vrms | Analog Devices
料号： ADUM3155BRSZ-RL7 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.06 | $11.06 |
| 10 | $10.5 | $105.00 |
| 100 | $9.95 | $995.00 |
| 500 | $9.4 | $4,700.00 |
| 1,000 | $8.85 | $8,850.00 |
ADUM3155BRSZ-RL7 概述
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 isolation. The ADUM3155BRSZ-RL7 uses Analog Devices' iCoupler chip-scale transformer technology, which offers superior performance compared to optocouplers, including higher data rates, lower power consumption, and better reliability.
Key features include a 34 Mbps data rate, 14 ns propagation delay, and 25 kV/µs CMTI, making it suitable for high-speed SPI communication in noisy industrial environments. The device supports 5 V operation on both sides (VDD1 and VDD2) and is available in a tape-and-reel package (RL7 suffix) for automated assembly.
The ADUM3155BRSZ-RL7 is part of the ADuM315x family, which includes ADuM3151, ADuM3152, and ADuM3153 variants. These devices are designed to isolate SPI buses, providing low propagation delay and high data integrity. The iCoupler technology integrates micro-transformers and high-speed CMOS circuits, ensuring robust isolation and signal integrity.
Typical applications include isolated SPI interfaces in industrial automation, motor control, data acquisition systems, and medical equipment. The device is also used in isolated power supplies and communication interfaces where ground loop isolation is critical.
When designing with this device, ensure proper PCB layout to maintain isolation spacing and minimize parasitic capacitance. The SSOP package requires careful soldering to avoid thermal stress. For high-speed operation, keep traces short and use proper termination to maintain signal integrity.
直接替换替代料： ADUM3155BRSZ-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： ADUM3155BRSZ-RL7 （相同外形与封装尺寸） ——差异在于 Technology, Isolation Voltage, Number of Channels, Package, Propagation Delay.
快速对比工具——选择替代料号进行并排对比：
ADUM3151BRSZ-RL7
✅ 直接替换✓ 有现货
$7.45 / 个
查看数据手册 →ADUM3152BRSZ-RL7
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.16 / 个
查看数据手册 →ADUM3153BRSZ-RL7
✅ 直接替换✓ 有现货
$3.1 / 个
查看数据手册 →ADUM3154BRIZ
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
ADUM4154BRIZ
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$4.16 / 个
查看数据手册 →ADUM3155BRSZ-RL7 规格参数
| Isolation Voltage | 3750 Vrms |
| Number of Channels | 7 |
| 数据速率 | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| Supply Voltage (VDD1) | 4.5 V to 5.5 V |
| Supply Voltage (VDD2) | 4.5 V to 5.5 V |
| 工作温度 | -40°C to +125°C |
| 封装 | 20-SSOP (0.209", 5.30mm Width) |
| 安装类型 | Surface Mount |
| Technology | iCoupler |
| SPI Clock Rate | 17 MHz |
| RoHS 状态 | Compliant |
| Qualification | Industrial |
ADUM3155BRSZ-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 | GND1 — Ground side 1 |
| 引脚 8 | VDD1 — Supply voltage side 1 |
| 引脚 9 | NC — No connect |
| 引脚 10 | NC — No connect |
| 引脚 11 | VDD2 — Supply voltage side 2 |
| 引脚 12 | GND2 — Ground side 2 |
| 引脚 13 | CLK2 — Isolated clock output |
| 引脚 14 | MO/SI2 — Isolated data output |
| 引脚 15 | MI/SO2 — Isolated data input |
| 引脚 16 | SS2 — Isolated slave select |
| 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
ADUM3155BRSZ-RL7 适用于 6 应用s: Industrial Automation, Motor Control, Data Acquisition Systems, Medical Equipment, Isolated Power Supplies, Communication Interfaces.
Industrial Automation
The ADUM3155BRSZ-RL7 provides isolated SPI communication in industrial automation systems, ensuring reliable data transfer between controllers and sensors in noisy environments. Its 3750 Vrms isolation and 25 kV/µs CMTI protect against ground loops and transient voltages, while the 34 Mbps data rate supports high-speed control loops. The device operates over -40°C to +125°C, making it suitable for harsh factory floors.
推荐
Motor Control
In motor control applications, the ADUM3155BRSZ-RL7 isolates the SPI interface between the microcontroller and gate driver or encoder. The low 14 ns propagation delay ensures precise timing for PWM signals, while the high CMTI prevents false triggering from motor-induced transients. The 5 V operation simplifies power supply design, and the SSOP package fits compact drive modules.
推荐
Data Acquisition Systems
The ADUM3155BRSZ-RL7 is used in data acquisition systems to isolate the ADC from the host controller, preventing ground noise from corrupting measurements. Its 34 Mbps data rate allows high-speed sampling, and the 3750 Vrms isolation protects sensitive analog circuits from high-voltage transients. The device supports SPI clock rates up to 17 MHz, ensuring compatibility with high-resolution ADCs.
推荐
Medical Equipment
In medical equipment, the ADUM3155BRSZ-RL7 provides galvanic isolation for patient safety, isolating SPI interfaces in monitoring devices and diagnostic instruments. The 3750 Vrms isolation meets stringent safety standards, while the low propagation delay ensures real-time data transmission. The wide temperature range and high reliability make it suitable for critical medical applications.
推荐
Isolated Power Supplies
The ADUM3155BRSZ-RL7 is used in isolated power supplies to communicate control signals across the isolation barrier. Its high CMTI ensures stable operation in the presence of switching noise, and the 34 Mbps data rate supports fast feedback loops. The device's low power consumption helps maintain efficiency in power supply designs.
推荐
Communication Interfaces
The ADUM3155BRSZ-RL7 is employed in communication interfaces to isolate SPI buses between boards or systems, preventing ground loops and reducing noise. Its 3750 Vrms isolation and 25 kV/µs CMTI make it robust for industrial communication networks. The device supports high-speed data transfer, ensuring minimal latency in real-time systems.
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推荐产品汇总
工程参考数据： ADUM3155BRSZ-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-RL7 | ADUM3152BRSZ-RL7 | ADUM3153BRSZ-RL7 |
|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| Propagation Delay | 14 ns | 14 ns | 14 ns | 14 ns |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
关键差异点
- High data rate of 34 Mbps （对比 ADUM3151BRSZ-RL7)
- Low propagation delay of 14 ns （对比 ADUM3152BRSZ-RL7)
- High CMTI of 25 kV/µs （对比 ADUM3153BRSZ-RL7)
设计说明
Maintain proper isolation spacing on the PCB. The ADUM3155BRSZ-RL7 provides 3750 Vrms isolation, so the creepage and clearance distances between the two sides must meet safety standards. Use a slot or cutout under the device to increase the isolation distance if needed.
Keep the SPI signal traces short and balanced to minimize propagation delay and signal skew. The 14 ns propagation delay is low, but mismatched trace lengths can cause timing errors. Use ground planes on both sides of the isolation barrier to reduce noise coupling.
Decouple both VDD1 and VDD2 with 0.1 µF and 10 µF capacitors placed close to the pins. The device operates from 4.5V to 5.5V, and stable power is essential for reliable isolation. Avoid sharing the same power supply without proper filtering to prevent noise coupling across the barrier.
合规信息
RoHS compliant per distributor data. Other compliance information not specified in provided data.