ADUM3481BRSZ

ADuM3481BRSZ is an Analog Devices iCoupler digital isolator. It provides galvanic isolation between two independent ground domains, allowing safe, fast data transfer across an isolated barrier.
Key points
- It contains four data channels arranged to carry digital signals across two isolated sides (two channels in each direction).
- Two isolated supply rails power the two sides (VDD1 and VDD2), enabling full isolation.
- No optocouplers are used; it’s a transformer/capacitive-coupled digital isolator with high immunity to noise and fast propagation.
- Typical features include high-speed data transfer (tens of Mbps range), low power, robust ESD protection, and good common-mode transient immunity.
- Package variant: BRSZ indicates the specific RoHS-compliant package and form factor (consult the datasheet for exact package type, pinout, and temperature range).
Applications
- Isolated microcontroller interfaces
- Industrial automation and motor control
- Data acquisition and instrumentation
Note: Refer to the ADuM3481B datasheet for exact electrical specs, timing, and packaging details.

ADuM3481BRSZ features (concise):
- 4-channel isolated SPI digital isolator (SCK, MOSI, MISO, CS) with barrier between sides.
- 5 kV RMS isolation rating between input and output sides.
- Up to ~25 Mbps data rate; supports SPI modes 0–3.
- Dual-supply operation: separate VDD1 and VDD2 (compatible with 1.65–5.5 V on both sides).
- Industrial operating temp: -40°C to +125°C.
- Small 16-lead SZ (SOIC) RoHS-compliant package.
- High common-mode transient immunity (CMTI) for robust noise immunity.
- Low propagation delay with minimal skew between channels.
- Suitable for isoSPI/digital-isolation applications requiring reliable, galvanic isolation.

ADUM3481BRSZ comes in a 16‑pin surface-mount SOIC package (SZ). It is RoHS-compliant.

- Pin count: 8 pins
- Function: Dual-channel unidirectional digital isolator. It provides galvanic isolation between the input side (VDD1, GND1, two data inputs) and the output side (VDD2, GND2, two data outputs) for two independent data paths.

Manufacturer: Analog Devices, Inc. (ADI).
What kind of company: An American multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal-processing integrated circuits, including data converters, amplifiers, sensors, and isolation products (e.g., iCoupler digital isolators).

ADuM3481BRSZ is a 4‑channel digital isolator (iCoupler). Typical application areas:
- Industrial automation and PLCs: isolated I/O, sensors, actuators
- Motor drives and power electronics: isolated control signals
- Data acquisition/instrumentation: isolated measurement paths
- Automotive and other high‑noise environments needing galvanic isolation
- Isolated digital interfaces (SPI/I2C/UART) between hostile domains

Closest equivalents (4-channel digital isolators) to ADUM3481BRSZ:
- TI ISO7741 / ISO7742
- Analog Devices ADuM1400 / ADuM1401 and ADuM1440 / ADuM1441
- Silicon Labs Si8420 / Si8421 / Si8422
Note: exact pinout, voltage rails (VDD1/VDD2) and direction for each channel vary; verify specs and package when cross-referencing.