ADUM3154BRSZ - 3.75kV SPI Digital Isolator | Analog Devices
MPN: ADUM3154BRSZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for ADUM3154BRSZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
ADUM3154BRIZ
β Drop-Inπ Reference alternative (not in catalog)
ADUM3154ARIZ
β Drop-Inπ Reference alternative (not in catalog)
ADUM3154BRSZ-RL7
β Drop-Inβ In Stock
$4.16 / Unit
View Datasheet βADUM3154ARSZ
β Drop-Inπ Reference alternative (not in catalog)
ADUM3154BRIZ-RL
β Drop-Inπ Reference alternative (not in catalog)
ADUM3154BRSZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 7 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 34 Mbps |
| CMTI | 25 kV/Β΅s |
| Propagation Delay | [DATA_NEEDED: propagation delay value] |
| Supply Voltage VDD1 | 3.0 V to 3.6 V |
| Supply Voltage VDD2 | 4.5 V to 5.5 V |
| Operating Temperature | -40Β°C to +125Β°C |
| Package | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Technology | iCoupler |
| SPI Clock Rate | 17 MHz |
| Number of Slaves Supported | 4 |
| RoHS Status | Compliant |
| Isolation Type | Magnetic Coupling |
ADUM3154BRSZ Pin Configuration
| Pin 1 | VDD1 β Primary supply voltage (3.0V to 3.6V) |
| Pin 2 | GND1 β Primary ground |
| Pin 3 | CLK β SPI clock input |
| Pin 4 | MO/SI β Master out, slave in data |
| Pin 5 | MI/SO β Master in, slave out data |
| Pin 6 | SS1 β Slave select 1 |
| Pin 7 | SS2 β Slave select 2 |
| Pin 8 | SS3 β Slave select 3 |
| Pin 9 | SS4 β Slave select 4 |
| Pin 10 | GND1 β Primary ground |
| Pin 11 | GND2 β Secondary ground |
| Pin 12 | VDD2 β Secondary supply voltage (4.5V to 5.5V) |
| Pin 13 | SS4 β Slave select 4 (isolated side) |
| Pin 14 | SS3 β Slave select 3 (isolated side) |
| Pin 15 | SS2 β Slave select 2 (isolated side) |
| Pin 16 | SS1 β Slave select 1 (isolated side) |
| Pin 17 | MI/SO β Master in, slave out data (isolated side) |
| Pin 18 | MO/SI β Master out, slave in data (isolated side) |
| Pin 19 | CLK β SPI clock (isolated side) |
| Pin 20 | GND2 β Secondary ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
ADUM3154BRSZ is suitable for 6 applications: Industrial Motor Control, Data Acquisition Systems, Isolated SPI for Medical Devices, Isolated Communication in Renewable Energy, Isolated SPI in Automotive Electronics, Isolated SPI in Test and Measurement.
Industrial Motor Control
The ADUM3154BRSZ provides galvanic isolation for SPI communication between a microcontroller and motor driver ICs in industrial drives. Its 3750 Vrms isolation and 25 kV/Β΅s CMTI ensure reliable operation in noisy environments with high voltage transients. The 34 Mbps data rate supports high-speed SPI for real-time control loops, while the 7 channels accommodate multiple SPI signals and control lines. This isolator helps prevent ground loops and protects low-voltage logic from high-voltage motor supplies, enhancing system safety and reliability.
Recommended
Data Acquisition Systems
In data acquisition systems, the ADUM3154BRSZ isolates the SPI bus between an ADC and a host controller, preventing noise from sensors and actuators from corrupting digital signals. Its low propagation delay and jitter maintain signal integrity at high data rates, ensuring accurate data transfer. The 7-channel configuration allows isolation of multiple SPI signals and control lines, simplifying system design. The wide operating temperature range (-40Β°C to +125Β°C) makes it suitable for harsh industrial environments.
Recommended
Isolated SPI for Medical Devices
The ADUM3154BRSZ is ideal for medical devices requiring galvanic isolation for patient safety. Its 3750 Vrms isolation meets stringent safety standards, while the high data rate supports fast SPI communication for real-time monitoring. The low power consumption and small SSOP package make it suitable for portable medical equipment. The device's high CMTI ensures reliable operation in the presence of electromagnetic interference from other medical equipment.
Recommended
Isolated Communication in Renewable Energy
In solar inverters and wind turbine controllers, the ADUM3154BRSZ isolates SPI communication between power management ICs and control processors. Its high isolation voltage protects against high-voltage transients from the power stage, while the 34 Mbps data rate enables fast communication for maximum power point tracking. The device's wide temperature range and high CMTI ensure reliable operation in outdoor environments with extreme temperatures and electrical noise.
Recommended
Isolated SPI in Automotive Electronics
The ADUM3154BRSZ is suitable for automotive applications such as battery management systems and motor drives, where galvanic isolation is required for safety and noise immunity. Its 3750 Vrms isolation and 25 kV/Β΅s CMTI meet automotive requirements for robustness. The device operates over -40Β°C to +125Β°C, covering the automotive temperature range. The 7-channel configuration allows isolation of multiple SPI signals, reducing component count and board space.
Recommended
Isolated SPI in Test and Measurement
In test and measurement equipment, the ADUM3154BRSZ isolates SPI communication between measurement front-ends and digital processors, preventing ground loops and reducing noise. Its high data rate and low jitter ensure accurate timing for synchronized measurements. The device's small SSOP package is ideal for compact instruments. The wide operating temperature range and high CMTI make it suitable for benchtop and portable test equipment.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3154BRSZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3154BRIZ | ADUM3154ARIZ | ADUM3154BRSZ-RL7 | ADUM3154ARSZ |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SOIC-W | 20-SOIC-W | 20-SSOP | 20-SSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 3750 Vrms | 3750 Vrms | 2500 Vrms |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps |
| CMTI | 25 kV/Β΅s | 25 kV/Β΅s | 25 kV/Β΅s | 25 kV/Β΅s | 25 kV/Β΅s |
| Number of Channels | 7 | 7 | 7 | 7 | 7 |
| Supply Voltage VDD1 | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
| Supply Voltage VDD2 | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
Key Differentiators
- High CMTI of 25 kV/Β΅s (vs ADUM3154ARSZ)
- 7-channel configuration (vs ISO7742DW)
- Small SSOP package (vs ADUM3154BRIZ)
Design Notes
For optimal isolation performance, maintain a clearance of at least 8 mm between the primary and secondary sides of the PCB. Use a solid ground plane on each side, but do not connect the grounds together except through the isolator. Place decoupling capacitors (0.1 Β΅F) close to each VDD pin to minimize noise.
Keep the SPI signal traces as short as possible and avoid routing them near high-voltage or high-current traces. Use differential routing for CLK and data lines if possible to reduce EMI. Ensure that the isolation barrier is not bridged by any copper traces or components.
Do not exceed the absolute maximum ratings for VDD1 and VDD2. Ensure that the input signals do not exceed the supply voltages. Also, avoid applying signals to the isolated side before VDD2 is powered, as this can cause latch-up. Refer to the datasheet for proper power-up sequencing.
Compliance Information
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided sources.