ADUM3154BRSZ-RL7 - SPI Digital Isolator 3750Vrms | Analog Devices
MPN: ADUM3154BRSZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.2 | $520.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.16 | $4,160.00 |
Drop-in alternatives for ADUM3154BRSZ-RL7 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM3154BRSZ
✅ Drop-In✓ In Stock
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View Datasheet →ADUM3153BRSZ-RL7
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →ADUM3151BRSZ-RL7
✅ Drop-In✓ In Stock
$7.45 / Unit
View Datasheet →ADUM3154ARIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3154BRIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3154BRSZ-RL7
✅ Drop-In✓ In Stock
$4.16 / Unit
View Datasheet →ADUM3154BRSZ-RL7 Maximum Ratings & Electrical Characteristics
| Isolation Voltage | 3750 Vrms |
| Number of Channels | 7 (4 forward, 3 reverse) |
| Data Rate | 34 Mbps |
| Common-Mode Transient Immunity (CMTI) | 25 kV/µs |
| SPI Clock Rate | 17 MHz |
| Supply Voltage VDD1 | 3.0 V to 3.6 V |
| Supply Voltage VDD2 | 4.5 V to 5.5 V |
| Operating Temperature Range | -40°C to +125°C |
| Package | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Technology | iCoupler |
| Number of Slave Devices Supported | 4 |
| Propagation Delay | [DATA_NEEDED: Propagation Delay] |
| Jitter | [DATA_NEEDED: Jitter] |
| RoHS Status | Compliant |
ADUM3154BRSZ-RL7 Pin Configuration
| Pin 1 | VDD1 — Primary supply voltage (3.0V to 3.6V) |
| Pin 2 | GND1 — Primary ground |
| Pin 3 | CLK — SPI clock input |
| Pin 4 | MO/SI — Master out, slave in data |
| Pin 5 | MI/SO — Master in, slave out data |
| Pin 6 | SS1 — Slave select 1 |
| Pin 7 | SS2 — Slave select 2 |
| Pin 8 | SS3 — Slave select 3 |
| Pin 9 | SS4 — Slave select 4 |
| Pin 10 | GND1 — Primary ground |
| Pin 11 | VDD2 — Secondary supply voltage (4.5V to 5.5V) |
| Pin 12 | GND2 — Secondary ground |
| Pin 13 | CLK_ISO — Isolated SPI clock output |
| Pin 14 | MO/SI_ISO — Isolated master out, slave in data |
| Pin 15 | MI/SO_ISO — Isolated master in, slave out data |
| Pin 16 | SS1_ISO — Isolated slave select 1 |
| Pin 17 | SS2_ISO — Isolated slave select 2 |
| Pin 18 | SS3_ISO — Isolated slave select 3 |
| Pin 19 | SS4_ISO — Isolated slave select 4 |
| Pin 20 | GND2 — 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-RL7 is suitable for 6 applications: Industrial Automation, Motor Control, Data Acquisition Systems, Medical Equipment, Communication Systems, Test and Measurement.
Industrial Automation
The ADUM3154BRSZ-RL7 provides galvanic isolation for SPI communication between PLCs, sensors, and actuators. Its 3750Vrms isolation and 25kV/µs CMTI ensure reliable operation in noisy industrial environments. The 17MHz SPI clock rate supports high-speed data transfer for real-time control, while the multiple-slave capability allows connection of up to four SPI devices, reducing component count and simplifying design.
Recommended
Motor Control
In motor control systems, the ADUM3154BRSZ-RL7 isolates the microcontroller from the power stage, protecting against high-voltage transients and ground loops. The low propagation delay and jitter ensure accurate timing for PWM signals, while the 34Mbps data rate allows fast communication with encoder interfaces. The wide operating temperature range (-40°C to +125°C) makes it suitable for harsh motor environments.
Recommended
Data Acquisition Systems
The ADUM3154BRSZ-RL7 is ideal for isolating SPI buses in data acquisition systems, where it prevents ground loops and noise from corrupting analog measurements. Its 3750Vrms isolation protects sensitive ADCs from high common-mode voltages. The support for up to four SPI slaves allows multiple sensors to be connected through a single isolator, simplifying PCB layout and reducing cost.
Recommended
Medical Equipment
In medical devices, patient safety requires galvanic isolation between the patient-connected circuitry and the main control unit. The ADUM3154BRSZ-RL7 provides 3750Vrms isolation, meeting safety standards for medical equipment. Its low power consumption and high reliability make it suitable for battery-powered devices. The multiple-slave SPI support enables connection of various sensors and actuators while maintaining isolation.
Recommended
Communication Systems
The ADUM3154BRSZ-RL7 is used in communication systems to isolate SPI interfaces between baseband processors and RF front-ends, preventing ground loops and reducing noise. Its high CMTI (25kV/µs) ensures reliable operation in environments with high electromagnetic interference. The 17MHz SPI clock rate supports high-speed configuration of RF transceivers, while the compact SSOP package saves board space.
Recommended
Test and Measurement
In test and measurement equipment, the ADUM3154BRSZ-RL7 isolates the measurement circuitry from the host controller, ensuring accurate readings by eliminating ground noise. Its 3750Vrms isolation protects sensitive inputs from high voltages. The low jitter and propagation delay are critical for maintaining signal integrity in high-speed SPI communication, making it ideal for oscilloscopes, data loggers, and spectrum analyzers.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3154BRSZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3154BRSZ | ADUM3153BRSZ-RL7 | ADUM3151BRSZ-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 |
| Number of Channels | 7 (4 forward, 3 reverse) | 7 (4 forward, 3 reverse) | 6 (3 forward, 3 reverse) | 4 (2 forward, 2 reverse) |
| Data Rate | 34 Mbps | 34 Mbps | 34 Mbps | 34 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs |
| SPI Clock Rate | 17 MHz | 17 MHz | 17 MHz | 17 MHz |
| Supply Voltage VDD1 | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V | 3.0V to 3.6V |
Key Differentiators
- Supports up to four SPI slave devices (vs ADUM3153BRSZ-RL7)
- Higher isolation voltage than ADUM3154ARIZ (vs ADUM3154ARIZ)
- Tape and reel packaging for automated assembly (vs ADUM3154BRSZ)
Design Notes
Ensure proper PCB layout to minimize coupling across the isolation barrier. The datasheet recommends that any coupling that occurs should affect all pins equally on a given component side to prevent voltage differentials that could exceed absolute maximum ratings. Use a solid ground plane under the device and keep the isolation barrier clear of copper traces.
Decouple both VDD1 and VDD2 with 0.1µF ceramic capacitors placed as close to the pins as possible. Additionally, use a 10µF bulk capacitor on each supply rail to handle transient currents. The device operates with VDD1 from 3.0V to 3.6V and VDD2 from 4.5V to 5.5V, so ensure stable supplies within these ranges.
Do not exceed the absolute maximum ratings for input voltages or output currents. The device is designed for SPI communication, so ensure that the SPI signals are properly terminated and that the clock rate does not exceed 17 MHz. Also, verify that the isolation rating is sufficient for your application's safety requirements.
Compliance Information
RoHS compliance indicated on Veswin Electronics product page. Other compliance information not specified in provided data.