ADUM3155BRSZ - 7-Channel SPI Digital Isolator | Analog Devices
N.º da peça: ADUM3155BRSZ ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.92 | $4,92 |
| 10 | $4.43 | $44,30 |
| 100 | $3.94 | $394,00 |
| 500 | $3.55 | $1.775,00 |
| 1.000 | $3.16 | $3.160,00 |
ADUM3155BRSZ Visão geral
A digital isolator is a component that provides galvanic 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 separation between the controller and the peripheral. Digital isolators are part of the broader category of isolation components, which also include optocouplers and magnetic isolators, and are widely used in industrial automation, medical equipment, and power electronics.
The ADUM3155BRSZ features seven channels with a specific configuration: three forward channels (CLK, MO/SI, SS) and two reverse channels (MI/SO), plus two additional channels for general-purpose use. It operates from a 3.0V to 5.5V supply on both sides, with a maximum data rate of 34 Mbps. The device is available in a 20-lead SSOP package (0.209" width, 5.30mm) and is specified for the industrial temperature range of -40°C to +125°C.
Key features include a 3.75 kVrms isolation voltage, 25 kV/µs CMTI, 14 ns propagation delay, and 34 Mbps data rate. The device also offers a 2.5V to 5.5V logic supply range, making it compatible with a wide variety of microcontrollers and FPGAs. The iCoupler technology ensures reliable operation in harsh environments, with no wear-out mechanism, unlike optocouplers.
Typical applications include isolated SPI interfaces in industrial motor drives, isolated sensor data acquisition, isolated ADC/DAC interfaces, and isolated communication in medical and instrumentation systems. The high CMTI and low propagation delay make it suitable for high-speed, noise-prone environments.
When designing with the ADUM3155BRSZ, ensure proper power supply decoupling on both sides with 0.1 µF capacitors close to the VDD pins. The input and output sides must have separate ground planes to maintain isolation integrity. The device is RoHS compliant and lead-free.
Alternativas drop-in para ADUM3155BRSZ — 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 ADUM3155BRSZ (mesmo formato e footprint) — diferindo em Package, Propagation Delay, Technology, RoHS Status, Isolation Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
ADUM3154BRSZ
✅ Drop-In✓ Em estoque
$3.1 / unidade
Ver ficha técnica →ADUM3151BRSZ
✅ Drop-In✓ Em estoque
$7.8 / unidade
Ver ficha técnica →ADUM3152BRSZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.81 / unidade
Ver ficha técnica →ADUM3153BRSZ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$3.35 / unidade
Ver ficha técnica →ADUM3155BRSZ Especificações
| Number of Channels | 7 |
| Isolation Voltage | 3750 Vrms |
| Taxa de dados | 34 Mbps |
| Propagation Delay | 14 ns |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 5.5 V |
| Logic Supply Voltage | 2.5 V to 5.5 V |
| SPI Clock Rate | 17 MHz |
| Encapsulamento | 20-SSOP (0.209", 5.30mm Width) |
| Temperatura de operação | -40°C to +125°C |
| Status RoHS | Compliant |
| Lead-Free | Yes |
| Technology | iCoupler |
| Tipo de montagem | Surface Mount |
| Número de pinos | 20 |
Configuração de pinos do ADUM3155BRSZ
| Pino 1 | VDD1 — Supply voltage for side 1 |
| Pino 2 | GND1 — Ground for side 1 |
| Pino 3 | CLK — SPI clock input |
| Pino 4 | MO/SI — Master out, slave in data |
| Pino 5 | MI/SO — Master in, slave out data |
| Pino 6 | SS — Slave select input |
| Pino 7 | GND1 — Ground for side 1 |
| Pino 8 | VDD1 — Supply voltage for side 1 |
| Pino 9 | NC — No connect |
| Pino 10 | NC — No connect |
| Pino 11 | NC — No connect |
| Pino 12 | NC — No connect |
| Pino 13 | VDD2 — Supply voltage for side 2 |
| Pino 14 | GND2 — Ground for side 2 |
| Pino 15 | SS2 — Slave select output for side 2 |
| Pino 16 | MI/SO2 — Master in, slave out data for side 2 |
| Pino 17 | MO/SI2 — Master out, slave in data for side 2 |
| Pino 18 | CLK2 — SPI clock output for side 2 |
| Pino 19 | GND2 — Ground for side 2 |
| Pino 20 | VDD2 — Supply voltage for side 2 |
Aplicações típicas
ADUM3155BRSZ é adequado para 6 aplicaçãos: Isolated SPI for Industrial Motor Drives, Isolated Sensor Data Acquisition, Isolated ADC/DAC Interface, Isolated Communication in Medical Equipment, Isolated SPI in Power Electronics, Isolated SPI in Test and Measurement.
Isolated SPI for Industrial Motor Drives
The ADUM3155BRSZ provides galvanic isolation for SPI communication between a microcontroller and motor driver ICs in industrial drives. Its 3.75 kVrms isolation and 25 kV/µs CMTI ensure reliable operation in high-voltage, noisy environments. The 17 MHz SPI clock rate supports fast control loops, while the low 14 ns propagation delay minimizes signal skew. This isolator is placed between the MCU and the gate driver, protecting the low-voltage control side from high-voltage transients. The 20-SSOP package is compact for space-constrained drive PCBs.
Recomendado
Isolated Sensor Data Acquisition
In industrial sensor systems, the ADUM3155BRSZ isolates SPI signals from sensors like ADCs and temperature sensors. Its high data rate of 34 Mbps and low propagation delay ensure accurate real-time data transfer. The 3.75 kVrms isolation protects the controller from ground loops and electrical noise. The device operates over -40°C to +125°C, suitable for harsh environments. It is used in data acquisition systems where sensors are located remotely and require isolation for safety and signal integrity.
Recomendado
Isolated ADC/DAC Interface
The ADUM3155BRSZ is used to isolate SPI communication between a host processor and precision ADCs or DACs in measurement and control systems. Its 17 MHz SPI clock rate supports high-speed data conversion, while the 3.75 kVrms isolation prevents ground noise from corrupting analog signals. The 14 ns propagation delay ensures synchronized data transfer. This isolator is ideal for applications like process control, where analog front-ends must be isolated from digital controllers for safety and accuracy.
Recomendado
Isolated Communication in Medical Equipment
In medical devices, patient safety requires galvanic isolation between the patient-connected circuits and the control electronics. The ADUM3155BRSZ provides 3.75 kVrms isolation, meeting safety standards. Its low propagation delay and high data rate ensure reliable SPI communication for real-time monitoring. The device's small 20-SSOP package is suitable for compact medical devices. It is used in patient monitors, infusion pumps, and diagnostic equipment where isolation is critical.
Recomendado
Isolated SPI in Power Electronics
The ADUM3155BRSZ is used to isolate SPI communication in power electronics systems like solar inverters and battery management systems. Its high CMTI of 25 kV/µs ensures reliable operation in the presence of fast switching transients. The 3.75 kVrms isolation protects the control circuitry from high-voltage power stages. The device supports SPI clock rates up to 17 MHz, enabling fast communication with power management ICs. It is designed to operate in the industrial temperature range, making it suitable for outdoor and harsh environments.
Recomendado
Isolated SPI in Test and Measurement
In test and measurement equipment, the ADUM3155BRSZ isolates SPI communication between the main processor and measurement front-ends, ensuring accurate readings by eliminating ground noise. Its 34 Mbps data rate and 14 ns propagation delay allow high-speed data acquisition. The 3.75 kVrms isolation protects sensitive measurement circuits from external interference. The device is used in oscilloscopes, data loggers, and spectrum analyzers where isolation is necessary for signal integrity.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADUM3155BRSZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | ADUM3154BRSZ | ADUM3151BRSZ | ADUM3152BRSZ |
|---|---|---|---|---|
| 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 |
| Propagation Delay | 14 ns | 14 ns | 14 ns | 14 ns |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| SPI Clock Rate | 17 MHz | 17 MHz | 17 MHz | 17 MHz |
| Channel Configuration | Single slave SPI | Multiple slave SPI | Single slave SPI | Dual slave SPI |
Principais diferenciais
- High CMTI of 25 kV/µs (vs ISO7742DW)
- Low propagation delay of 14 ns (vs ADUM3151BRSZ)
- 7-channel configuration (vs ISO7742DW)
Notas de projeto
Ensure both VDD1 and VDD2 are properly decoupled with 0.1 µF ceramic capacitors placed as close as possible to the respective pins. Additionally, a 10 µF bulk capacitor on each side is recommended to handle transient currents. The supply voltage range is 3.0V to 5.5V, so verify that both sides are within this range to avoid malfunction.
Maintain a clear isolation barrier on the PCB by keeping the ground planes of side 1 and side 2 separated. Do not route traces across the isolation boundary. The recommended creepage distance for 3.75 kVrms isolation is at least 8 mm, so ensure adequate spacing between the two sides. Use a slot in the PCB under the isolator to enhance isolation.
Place the ADUM3155BRSZ close to the SPI connector or the peripheral device to minimize trace lengths and reduce signal integrity issues. Keep the SPI signal traces short and matched in length to avoid skew. Use series termination resistors (e.g., 33 Ω) near the driver to reduce reflections, especially at high data rates.
Informações de conformidade
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified. Lead-free per datasheet.