ADUM3150BRSZ - 6-Channel SPI Digital Isolator | Analog Devices
MPN: ADUM3150BRSZ ✓ 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 |
ADUM3150BRSZ Overview
A digital isolator is a device that transfers digital signals across an isolation barrier, providing galvanic isolation between two circuits to protect against voltage transients, ground loops, and noise. Digital isolators are essential in industrial automation, medical equipment, and communication systems where safety and signal integrity are critical. The ADUM3150BRSZ is specifically designed for SPI buses, which are widely used to connect microcontrollers to sensors, ADCs, DACs, and other peripherals. By isolating the SPI signals, the device enables safe communication between systems operating at different ground potentials.
Key features of the ADUM3150BRSZ include six channels with a propagation delay of 14 ns and jitter of 1 ns, supporting SPI clock rates up to 17 MHz. The device also includes a delay clock channel that allows for 40 MHz SPI data transfers. The low propagation delay and jitter ensure high-speed, reliable data transmission, making it suitable for applications requiring precise timing. The device operates over a temperature range of -40°C to +125°C, ensuring robust performance in harsh environments.
The ADUM3150BRSZ uses iCoupler technology, which employs chip-scale transformers to transmit data across the isolation barrier. This technology offers advantages over optocouplers, including higher data rates, lower power consumption, and better reliability. The device also features a 25 kV/µs CMTI, which ensures reliable operation in noisy industrial environments. The SSOP package is compact and suitable for space-constrained designs.
Typical applications for the ADUM3150BRSZ include isolated SPI interfaces in industrial automation, motor control, and power conversion systems. It is also used in medical devices, where isolation is required for patient safety, and in communication systems to prevent ground loops. The device is ideal for applications where high-speed SPI communication and galvanic isolation are needed.
When designing with the ADUM3150BRSZ, it is important to ensure proper power supply decoupling and to follow the recommended layout guidelines to maintain signal integrity. The device requires a minimum of 4.5 V on VDD1 and 3.0 V on VDD2 for reliable operation. Additionally, the input and output sides must be properly isolated to prevent voltage differentials that could exceed the absolute maximum ratings.
Drop-in alternatives for ADUM3150BRSZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with ADUM3150BRSZ (same form factor and footprint) — differing in Number of Channels, Package, Propagation Delay.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
ADUM3150BRSZ-RL7
✅ Drop-In✓ In Stock
$5.9 / Unit
View Datasheet →ADUM3150ARSZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM4150BRIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM4150ARIZ
✅ Drop-In📋 Reference alternative (not in catalog)
ADUM3150BRSZ Specifications
| Number of Channels | 6 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 40 Mbps |
| CMTI | 25 kV/µs |
| Propagation Delay | 14 ns |
| Jitter | 1 ns |
| Supply Voltage VDD1 | 4.5 V to 5.5 V |
| Supply Voltage VDD2 | 3.0 V to 3.6 V |
| Operating Temperature | -40°C to +125°C |
| Package | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
| Technology | iCoupler |
| SPI Clock Rate | 17 MHz |
| Delay Clock Channel | Yes |
| RoHS Status | Compliant |
ADUM3150BRSZ Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VIA — Input channel A |
| Pin 4 | VOA — Output channel A |
| Pin 5 | VIB — Input channel B |
| Pin 6 | VOB — Output channel B |
| Pin 7 | VIC — Input channel C |
| Pin 8 | VOC — Output channel C |
| Pin 9 | VOD1 — Output channel D1 |
| Pin 10 | VOD2 — Output channel D2 |
| Pin 11 | VDD2 — Supply voltage for side 2 |
| Pin 12 | GND2 — Ground for side 2 |
| Pin 13 | VOE — Output channel E |
| Pin 14 | VIE — Input channel E |
| Pin 15 | VOF — Output channel F |
| Pin 16 | VIF — Input channel F |
| Pin 17 | VOG — Output channel G |
| Pin 18 | VIG — Input channel G |
| Pin 19 | VOH — Output channel H |
| Pin 20 | VDD2 — Supply voltage for side 2 |
Typical Applications
ADUM3150BRSZ is suitable for 6 applications: Industrial Automation, Medical Equipment, Motor Control, Power Conversion, Communication Systems, Test and Measurement.
Industrial Automation
The ADUM3150BRSZ provides isolated SPI communication between PLCs, sensors, and actuators in industrial environments. Its 3750 Vrms isolation and 25 kV/µs CMTI ensure reliable operation in the presence of motor noise and voltage transients. The 40 Mbps data rate supports high-speed data acquisition and control loops, while the low propagation delay (14 ns) maintains timing accuracy for synchronized operations. The wide temperature range (-40°C to +125°C) makes it suitable for factory floor conditions.
Recommended
Medical Equipment
In medical devices, the ADUM3150BRSZ ensures patient safety by providing galvanic isolation between the patient-connected circuitry and the control system. The 3750 Vrms isolation rating meets stringent safety standards, while the high data rate (40 Mbps) enables real-time monitoring and control. The low jitter (1 ns) is critical for precise timing in diagnostic equipment. The device's compact SSOP package fits space-constrained designs, and its reliability over -40°C to +125°C ensures consistent performance in clinical environments.
Recommended
Motor Control
The ADUM3150BRSZ isolates the SPI interface between the microcontroller and motor driver in variable frequency drives and servo systems. Its high CMTI (25 kV/µs) prevents false triggering from fast-switching power stages, and the 40 Mbps data rate allows rapid parameter updates. The 14 ns propagation delay ensures synchronized PWM signals, while the 3750 Vrms isolation protects the control circuitry from high-voltage transients. The device operates reliably in the harsh electrical environment of motor control cabinets.
Recommended
Power Conversion
In power converters, the ADUM3150BRSZ provides isolated SPI communication for monitoring and control of power stages. The 3750 Vrms isolation ensures safe operation in high-voltage systems, and the 25 kV/µs CMTI prevents data corruption from switching noise. The 40 Mbps data rate supports fast feedback loops, while the low propagation delay (14 ns) minimizes latency in control signals. The device's wide temperature range and robust design make it ideal for power supplies, inverters, and battery management systems.
Recommended
Communication Systems
The ADUM3150BRSZ is used in communication systems to isolate SPI buses between base stations, routers, and network equipment. Its 3750 Vrms isolation prevents ground loops and protects against lightning surges, while the 40 Mbps data rate supports high-throughput data transfer. The low jitter (1 ns) ensures signal integrity in high-speed digital communication. The device's compact SSOP package is suitable for dense PCB layouts, and its wide temperature range ensures reliable operation in outdoor and industrial environments.
Recommended
Test and Measurement
In test and measurement equipment, the ADUM3150BRSZ provides isolated SPI communication between the measurement front-end and the processing unit. The 3750 Vrms isolation protects sensitive measurement circuits from ground noise and high-voltage transients. The 40 Mbps data rate enables high-speed data acquisition, while the 14 ns propagation delay ensures accurate timing for synchronized measurements. The device's low jitter (1 ns) is essential for precise signal analysis, and its wide temperature range supports use in various testing environments.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3150BRSZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3150BRSZ-RL7 | ADUM3150ARSZ | ADUM4150BRIZ | ADUM4150ARIZ | ISO7741DW |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | 20-SSOP | SOIC-16 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Isolation Voltage | 3750 Vrms | 3750 Vrms | 2500 Vrms | 5000 Vrms | 5000 Vrms | 5000 Vrms |
| Number of Channels | 6 | 6 | 6 | 6 | 6 | 4 |
| Data Rate | 40 Mbps | 40 Mbps | 40 Mbps | 40 Mbps | 40 Mbps | 100 Mbps |
| CMTI | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 25 kV/µs | 100 kV/µs |
| Propagation Delay | 14 ns | 14 ns | 14 ns | 14 ns | 14 ns | 10 ns |
| Supply Voltage VDD1 | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.25 V to 5.5 V |
Key Differentiators
- Higher isolation voltage than ADUM3150ARSZ (vs ADUM3150ARSZ)
- Lower propagation delay than ISO7741DW (vs ISO7741DW)
- SPI-optimized with delay clock channel (vs ISO7741DW)
Design Notes
Place decoupling capacitors (0.1 µF and 10 µF) close to VDD1 and VDD2 pins to ensure stable supply voltages. Use a solid ground plane under the device to minimize noise and improve CMTI performance. Keep the isolation barrier clear of copper traces to maintain isolation rating.
Route SPI signals with controlled impedance to minimize reflections and crosstalk. Keep traces short and balanced between the isolator and the SPI master/slave. Avoid routing high-speed signals near the isolation barrier to prevent coupling.
Ensure that the voltage differential between VDD1 and VDD2 does not exceed the absolute maximum ratings. Failure to do so can cause latch-up or permanent damage. Also, verify that the input signals do not exceed the supply voltage range to prevent damage to the input stages.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.