ADUM3151BRSZ-RL7 - 7-Ch SPI Isolator 3.75kV | Analog Devices
MPN: ADUM3151BRSZ-RL7 ✓ Hoạt độngADUM3151BRSZ-RL7 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho ADUM3151BRSZ-RL7 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với ADUM3151BRSZ-RL7 (cùng hình factor và footprint) — khác nhau ở Number of Channels, Technology, Data Rate, Supply Voltage.
ADUM3151BRSZ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADUM3150BRSZ-RL7
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →ADUM3153BRSZ-RL7
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →ADUM240E0BRIZ
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
ISO7741DW
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
ADUM3151BRSZ-RL7 Thông số kỹ thuật
| Technology | iCoupler (Magnetic Coupling) |
| Number of Channels | 7 |
| Inputs - Side 1/Side 2 | 5/2 |
| Isolation Voltage | 3750 Vrms |
| Tốc độ dữ liệu | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| SPI Clock Rate | 17 MHz |
| Điện áp cung cấp | 3.3V or 5V |
| Hộp | 20-SSOP (0.209", 5.30mm Width) |
| Nhiệt độ hoạt động | -40°C to +125°C |
| Kiểu lắp đặt | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Trạng thái RoHS | Compliant |
| Isolated Power | No |
Cấu hình chân ADUM3151BRSZ-RL7
| Chân 1 | VDD1 — Supply voltage side 1 |
| Chân 2 | GND1 — Ground side 1 |
| Chân 3 | CLK — SPI clock input |
| Chân 4 | MO/SI — Master out/slave in |
| Chân 5 | MI/SO — Master in/slave out |
| Chân 6 | SS — Slave select |
| Chân 7 | AUX1 — Auxiliary channel 1 |
| Chân 8 | AUX2 — Auxiliary channel 2 |
| Chân 9 | AUX3 — Auxiliary channel 3 |
| Chân 10 | GND1 — Ground side 1 |
| Chân 11 | VDD2 — Supply voltage side 2 |
| Chân 12 | GND2 — Ground side 2 |
| Chân 13 | AUX4 — Auxiliary channel 4 |
| Chân 14 | AUX5 — Auxiliary channel 5 |
| Chân 15 | AUX6 — Auxiliary channel 6 |
| Chân 16 | AUX7 — Auxiliary channel 7 |
| Chân 17 | GND2 — Ground side 2 |
| Chân 18 | VDD2 — Supply voltage side 2 |
| Chân 19 | NC — No connect |
| Chân 20 | NC — No connect |
Ứng dụng tiêu biểu
ADUM3151BRSZ-RL7 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho ADUM3151BRSZ-RL7 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- SPI-optimized with 7 channels (vsADUM240E0BRIZ)
- High CMTI of 25 kV/µs (vsISO7741DW)
- Low propagation delay of 14 ns (vsADUM3150BRSZ-RL7)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliance confirmed by distributor listings. Other compliance data not explicitly stated in the provided data.