ADUM3481BRSZ

ADUM3481BRSZ is a four‑channel digital isolator from Analog Devices’ iCoupler family. It provides galvanic isolation between two independent sides (VDD1 and VDD2) so microcontrollers can safely interface with external peripherals. The device uses capacitive isolation technology to transfer digital signals across the barrier with no DC path, offering high‑voltage isolation (up to 5 kV RMS) and independent supply rails on each side. It typically supports four digital channels suitable for interfaces like SPI, I2C, UART, etc., and comes in a 16‑pin package (BR/SZ variant). Key benefits include protection from voltage spikes, EMI robustness, fast data transfer, and low power consumption, making it suitable for industrial, automotive, medical, and consumer applications. For exact electrical specs (isolation rating, propagation delay, voltage ranges, and package details), consult the ADuM3481BRSZ datasheet.

Equivalent parts (4-channel SPI digital isolators) include:
- TI ISO7841/ISO7842 family
- Silicon Labs Si8620/Si8621 family
- Analog Devices ADuM1250/ADuM1251 family
Note: pinouts and voltage levels vary; check datasheets for exact compatibility.

Here are the key features of ADuM3481BRSZ (iCoupler digital isolator):
- 4-channel digital isolator (iCoupler technology) with galvanic isolation between sides
- 5 kV RMS isolation (reinforced barrier) between the two sides
- Independent power rails on each side: VDD1 and VDD2; supports 3.3V and 5V logic
- High-speed data transfer: up to about 25 Mbps per channel; fast propagation delay (~8 ns typical)
- High common-mode transient immunity (CMTI) for robust operation in noisy environments
- Low power consumption and suitable for mixed-signal systems
- Wide operating temperature range: -40°C to +125°C
- Packaging: SZ16 (16-lead, RoHS-compliant)
- Applications: SPI, I2C, SMBus, general-purpose digital signal isolation
Note: For exact electrical specs (bit rate, propagation delay, CMTI, and supply ranges) refer to the datasheet for the ADuM3481BRSZ.

- Pin count: 8 pins (8‑pin package)
- Function: ADuM3481BRSZ is a three‑channel digital isolator with two isolated power domains (VDD1/VDD2). It provides three isolated uni‑directional data paths between the primary and secondary sides, typically used to isolate SPI or other digital signals between a microcontroller and peripherals.

- Manufacturer: Analog Devices, Inc. (ADI)
- Company type: A global semiconductor company that designs and manufactures analog, mixed-signal, and DSP integrated circuits, sensors, and related signal-processing solutions. Headquartered in Norwood, Massachusetts, with worldwide operations.

ADuM3481BRSZ is a 4-channel isoSPI digital isolator used to galvanically isolate SPI buses.
Typical application areas:
- Isolated MCU-to-peripheral SPI communications
- Industrial automation: sensors, actuators, motor drives
- Automotive electronics: ECUs to sensors with isolation
- Medical instrumentation: patient-safe isolated data links
- Data acquisition/instrumentation: isolated ADCs/DACs front ends
- Power meters and energy-management systems
- Test/measurement equipment requiring SPI isolation

RoHS-compliant plastic SOIC-16 (surface-mount) package. The SZ suffix indicates the SOIC-16 package type.