Isolated power and signal in one 8-SOIC
The ADUM5242ARZ is a 2-channel, general-purpose digital isolator from Analog Devices' IsoPower and iCoupler series that integrates both the signal isolation and an isolated DC/DC converter into a single 8-SOIC package. This means it generates its own isolated output power from the input supply, eliminating the need for a separate isolated power module on the BOM. It provides 2500Vrms isolation between input and output sides, with a unidirectional channel configuration — two channels on Side 2 receive data from Side 1. The data rate is rated at 1Mbps, with a maximum propagation delay of 70ns in both directions. The supply voltage range is split: 2.7V to 4.0V on one side, 4.5V to 5.5V on the other, reflecting the IsoPower converter's input and output rail requirements.
The 2500Vrms isolation rating is a 1-minute withstand voltage per the standard. This is sufficient for basic isolation in industrial sensors, motor-drive interfaces, medical patient-monitoring equipment, and isolated power-supply feedback paths. It does not provide reinforced isolation for mains-connected medical devices — that typically requires 5000Vrms or higher. Because the IsoPower converter is integrated, the ADUM5242ARZ replaces a separate isolated DC/DC module plus a standard digital isolator, saving board area and reducing the component count on the isolated power rail. The trade-off is that the available isolated output power is limited — typically tens of milliwatts — so it is sized for powering a few low-power components on the isolated side, not an entire subsystem.
1Mbps data rate and 70ns propagation delay
The 1Mbps data rate limits the digital channels to slow control signals, GPIO status, UART at moderate baud rates, or I2C-like signaling. It will not support high-speed SPI (typically 10-50Mbps) or full-speed CAN (1Mbps with tighter timing). The 70ns propagation delay is the maximum from input to output — budget this into any control-loop or timing-sensitive path. Rise and fall times are typically 2.5ns, which keeps edge-rate-induced emissions manageable. Common-mode transient immunity is rated at a minimum of 25kV/µs, meaning the output will not glitch when a fast high-voltage transient jumps across the isolation barrier — relevant for motor-drive and inverter applications.
Lifecycle and compliance
No special reflow profile beyond the standard JEDEC MSL rating applies — verify the specific MSL level from the latest datasheet if the part has been in storage.