What the 25 Mbps data rate buys you
The ADUM3482BRSZ is a 4-channel, unidirectional digital isolator from the iCoupler family, rated at 25 Mbps per channel with 3750 Vrms isolation. That data rate covers most SPI clock lines up to 25 MHz without stretching the timing budget, so it fits directly between a 3.3 V MCU and an isolated peripheral without needing a slower fallback mode. The 2/2 input-to-output split gives you two channels each direction, which maps neatly to SPI (SCLK, MOSI, MISO, and one CS) or two independent UART links.
Isolation voltage and transient immunity — where it sits in the cycle
3750 Vrms is the standard reinforced isolation level for industrial fieldbus, motor-drive feedback, and medical patient-interface barriers. The 25 kV/µs common-mode transient immunity means it holds the data through fast-switching inverter edges — a spec that matters more than the headline isolation number when the part sits between a gate driver and a controller on a motor drive. At 25 Mbps with 33 ns max propagation delay and 3 ns pulse-width distortion, the timing skew is tight enough to keep SPI frames intact across the barrier without extra deserializing.
Supply rails and temperature range
No isolated power on board; you supply Vdd on both sides separately.
Lifecycle and supply posture
ADI lists the ADUM3482BRSZ as Active product status, so there is no LTB window or EOL notice to watch. The part is ROHS3 compliant and ships in a 20-SSOP package.