ADUM3152BRSZ - 7-Ch SPI Digital Isolator | Analog Devices
MPN: ADUM3152BRSZ ✓ 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 ADUM3152BRSZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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ADUM3151BRSZ
✅ Drop-In✓ In Stock
$7.8 / Unit
View Datasheet →ADUM3153BRSZ
✅ Drop-In✓ In Stock
$3.35 / Unit
View Datasheet →ADUM3152BRSZ Maximum Ratings & Electrical Characteristics
| Number of Channels | 7 |
| Isolation Voltage | 3750 Vrms |
| Data Rate | 34 Mbps |
| Propagation Delay | 14 ns |
| CMTI | 25 kV/µs |
| Supply Voltage (VDD1/VDD2) | 3.0 V to 5.5 V |
| Package | 20-SSOP (0.209", 5.30 mm Width) |
| Operating Temperature Range | -40°C to +125°C |
| SPI Clock Rate | 17 MHz |
| Auxiliary Channel Directionality | 1/2 |
| Technology | iCoupler |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount |
| Number of Pins | 20 |
| Isolation Type | Galvanic |
ADUM3152BRSZ Pin Configuration
| Pin 1 | VDD1 — Supply voltage for side 1 |
| Pin 2 | GND1 — Ground for side 1 |
| Pin 3 | VOA — Output for auxiliary channel A |
| Pin 4 | VIA — Input for auxiliary channel A |
| Pin 5 | VOB — Output for auxiliary channel B |
| Pin 6 | VIB — Input for auxiliary channel B |
| Pin 7 | VOC — Output for auxiliary channel C |
| Pin 8 | VIC — Input for auxiliary channel C |
| Pin 9 | GND1 — Ground for side 1 |
| Pin 10 | VDD1 — Supply voltage for side 1 |
| Pin 11 | VDD2 — Supply voltage for side 2 |
| Pin 12 | GND2 — Ground for side 2 |
| Pin 13 | VIC — Input for auxiliary channel C (side 2) |
| Pin 14 | VOC — Output for auxiliary channel C (side 2) |
| Pin 15 | VIB — Input for auxiliary channel B (side 2) |
| Pin 16 | VOB — Output for auxiliary channel B (side 2) |
| Pin 17 | VIA — Input for auxiliary channel A (side 2) |
| Pin 18 | VOA — Output for auxiliary channel A (side 2) |
| Pin 19 | GND2 — Ground for side 2 |
| Pin 20 | VDD2 — Supply voltage for side 2 |
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
ADUM3152BRSZ is suitable for 6 applications: Isolated SPI for Industrial Automation, Isolated Motor Control, Isolated Data Acquisition, Isolated Power Conversion, Isolated Medical Equipment, Isolated Communication in Renewable Energy.
Isolated SPI for Industrial Automation
The ADUM3152BRSZ is ideal for isolating SPI communication in industrial automation systems, such as PLCs and motor drives. Its 3750 Vrms isolation protects low-voltage logic from high-voltage transients and ground loops. The 34 Mbps data rate and 14 ns propagation delay ensure high-speed, reliable communication between microcontrollers and peripheral devices like ADCs and DACs. The device's high CMTI of 25 kV/µs rejects noise from motors and power converters, maintaining signal integrity in harsh environments. Its wide supply range (3.0V to 5.5V) allows interfacing with various logic levels, simplifying design.
Recommended
Isolated Motor Control
In motor control applications, the ADUM3152BRSZ isolates the SPI interface between the microcontroller and gate driver or encoder. The 3750 Vrms isolation protects the control circuitry from high-voltage motor drives. The device's high CMTI ensures reliable operation in the presence of fast voltage transients from PWM switching. The 34 Mbps data rate supports high-speed communication for real-time control loops. The 7-channel configuration allows isolation of multiple SPI signals, including clock, data, and chip select, in a single package, reducing board space and cost.
Recommended
Isolated Data Acquisition
The ADUM3152BRSZ is used in isolated data acquisition systems to isolate the SPI bus between the ADC and the host processor. This prevents ground loops and noise from corrupting sensitive measurements. The device's low propagation delay (14 ns) and high data rate (34 Mbps) enable high-speed sampling without timing errors. The 3750 Vrms isolation provides safety in medical and industrial applications where patient or equipment isolation is required. The device's wide supply range allows it to interface with both 3.3V and 5V ADCs, making it versatile for various data acquisition designs.
Recommended
Isolated Power Conversion
In power conversion systems, the ADUM3152BRSZ isolates the SPI interface between the digital controller and the power stage. This provides galvanic isolation between the low-voltage control side and the high-voltage power side, enhancing safety and reducing noise coupling. The device's high CMTI (25 kV/µs) ensures reliable operation in the presence of switching transients. The 34 Mbps data rate supports fast communication for digital power control algorithms. The 7-channel configuration allows isolation of multiple SPI signals, simplifying the design of isolated power supplies and inverters.
Recommended
Isolated Medical Equipment
The ADUM3152BRSZ is suitable for medical equipment requiring galvanic isolation for patient safety. Its 3750 Vrms isolation meets the requirements for many medical standards. The device's low propagation delay and high data rate ensure accurate and fast data transfer between isolated sections, such as between a sensor front-end and a processing unit. The wide operating temperature range (-40°C to +125°C) makes it suitable for medical devices that may be exposed to varying environmental conditions. The compact 20-SSOP package saves board space in portable medical devices.
Recommended
Isolated Communication in Renewable Energy
In renewable energy systems like solar inverters and wind turbines, the ADUM3152BRSZ isolates the SPI communication between the control unit and monitoring circuits. This prevents ground loops and protects sensitive electronics from high voltages. The device's high CMTI ensures reliable operation in the presence of electromagnetic interference from power conversion. The 34 Mbps data rate supports fast communication for real-time monitoring and control. The 7-channel configuration allows isolation of multiple SPI signals, reducing component count and improving reliability in harsh outdoor environments.
Recommended
Recommended Products Summary
Engineering reference data for ADUM3152BRSZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | ADUM3151BRSZ | ADUM3153BRSZ | ADUM3152BRWZ |
|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP | 20-SSOP | 20-SOIC |
| 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 |
| Supply Voltage Range | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
| Auxiliary Channel Directionality | 1/2 | 2/1 | 3/0 | 1/2 |
Key Differentiators
- 7-channel SPI isolation with 1/2 auxiliary directionality (vs ADUM3151BRSZ)
- High CMTI of 25 kV/µs (vs ISO7741DW)
- Low propagation delay of 14 ns (vs SI8642BB-B-IS1)
Design Notes
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 supply 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 clearance of at least 8 mm between the high-voltage and low-voltage sides of the PCB to meet the 3750 Vrms isolation requirement. Use a ground plane on each side, but do not connect the grounds together. Place the device near the edge of the board to maximize creepage distance. Follow the recommended PCB layout in the datasheet for optimal isolation performance.
For high-speed SPI signals up to 34 Mbps, keep trace lengths short and matched to minimize skew. Use series termination resistors (e.g., 33 Ω) close to the driver to reduce reflections. Avoid routing SPI traces near high-noise sources such as switching regulators. The low propagation delay (14 ns) helps maintain timing margins, but proper layout is still essential.
Compliance Information
RoHS compliant per Analog Devices product page. AEC-Q100 not applicable as this is not an automotive-grade part.
