ADUM3151BRSZ-RL7 - 7-Ch SPI Isolator 3.75kV | Analog Devices
N.º da peça: ADUM3151BRSZ-RL7 ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 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 Visão geral
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.
Alternativas drop-in para ADUM3151BRSZ-RL7 — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ADUM3151BRSZ-RL7 (mesmo formato e footprint) — diferindo em Number of Channels, Technology, Data Rate, Supply Voltage.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADUM3151BRSZ
✅ Drop-In✓ Em estoque
$7.8 / unidade
Ver ficha técnica →ADUM3150BRSZ-RL7
✅ Drop-In✓ Em estoque
$5.9 / unidade
Ver ficha técnica →ADUM3153BRSZ-RL7
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$3.1 / unidade
Ver ficha técnica →ADUM240E0BRIZ
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
ISO7741DW
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
ADUM3151BRSZ-RL7 Especificações
| Technology | iCoupler (Magnetic Coupling) |
| Number of Channels | 7 |
| Inputs - Side 1/Side 2 | 5/2 |
| Isolation Voltage | 3750 Vrms |
| Taxa de dados | 34 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| SPI Clock Rate | 17 MHz |
| Tensão de alimentação | 3.3V or 5V |
| Encapsulamento | 20-SSOP (0.209", 5.30mm Width) |
| Temperatura de operação | -40°C to +125°C |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel (TR) |
| Status RoHS | Compliant |
| Isolated Power | No |
Configuração de pinos do ADUM3151BRSZ-RL7
| Pino 1 | VDD1 — Supply voltage side 1 |
| Pino 2 | GND1 — Ground side 1 |
| Pino 3 | CLK — SPI clock input |
| Pino 4 | MO/SI — Master out/slave in |
| Pino 5 | MI/SO — Master in/slave out |
| Pino 6 | SS — Slave select |
| Pino 7 | AUX1 — Auxiliary channel 1 |
| Pino 8 | AUX2 — Auxiliary channel 2 |
| Pino 9 | AUX3 — Auxiliary channel 3 |
| Pino 10 | GND1 — Ground side 1 |
| Pino 11 | VDD2 — Supply voltage side 2 |
| Pino 12 | GND2 — Ground side 2 |
| Pino 13 | AUX4 — Auxiliary channel 4 |
| Pino 14 | AUX5 — Auxiliary channel 5 |
| Pino 15 | AUX6 — Auxiliary channel 6 |
| Pino 16 | AUX7 — Auxiliary channel 7 |
| Pino 17 | GND2 — Ground side 2 |
| Pino 18 | VDD2 — Supply voltage side 2 |
| Pino 19 | NC — No connect |
| Pino 20 | NC — No connect |
Aplicações típicas
ADUM3151BRSZ-RL7 é adequado para 6 aplicaçãos: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADUM3151BRSZ-RL7 — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- SPI-optimized with 7 channels (vs ADUM240E0BRIZ)
- High CMTI of 25 kV/µs (vs ISO7741DW)
- Low propagation delay of 14 ns (vs ADUM3150BRSZ-RL7)
Notas de projeto
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.
Informações de conformidade
RoHS compliance confirmed by distributor listings. Other compliance data not explicitly stated in the provided data.