What this part does on your board
The ADUM5402WCRWZ-1RL is a quad-channel digital isolator from Analog Devices that integrates an isolated DC-DC converter on-chip — the IsoPower® and iCoupler® technology. It provides 2500Vrms galvanic isolation across four unidirectional channels, with two channels going each direction (inputs side 1/side 2: 2/2).
25 Mbps data rate and signal timing — what matters for the bus
With a 25 Mbps data rate and typical rise/fall times of 2.5 ns, this part handles SPI, UART, and general-purpose digital signalling cleanly. The 60 ns max propagation delay (tpLH/tpHL) is symmetric, which simplifies timing closure in bidirectional handshake lines. The 6 ns max pulse-width distortion means the duty cycle stays tight — important for PWM-like signals where edge symmetry matters.
Power supply and voltage range
The integrated isolated DC-DC converter generates a regulated output on the isolated side, so you don't need a separate transformer or isolated module for low-power side supplies — it's all in the 16-SOIC. That saves board area and BOM count in applications like isolated sensor interfaces or CAN/RS-485 transceiver power.
Automotive grade and temperature range
This part carries an Automotive grade designation, meaning it is qualified for the reliability and temperature demands of automotive applications.