The ADUM4121-1CRIZ is a single-channel isolated gate driver from Analog Devices' iCoupler series, using magnetic coupling to provide 5000 Vrms of galvanic isolation between the input logic and the output gate drive. It delivers a 2.3 A peak output current, enough to drive the gate capacitance of medium-power IGBTs, Si MOSFETs, and SiC FETs through their Miller plateau region without excessive switching loss. The 150 kV/µs common-mode transient immunity (CMTI) rating means this driver can sit on the secondary side of a half-bridge or full-bridge inverter and not misinterpret the fast dv/dt events at the switching node as a logic toggle — a common failure mode in motor drives, solar inverters, and UPS systems. The output supply range spans 11.6 V to 35 V, so you can set the gate drive voltage to 12 V for standard MOSFETs, 15 V for IGBTs, or 18 V to 20 V for SiC devices, all from the same part number.
Propagation delay and timing budget
Propagation delay is specified at 42 ns (tpLH) and 53 ns (tpHL) maximum, with a pulse-width distortion (PWD) of 13 ns max. The 18 ns typical rise and fall times are symmetric, which simplifies dead-time calculation in a half-bridge leg. When you budget the total loop delay for a switching cycle — controller PWM output, through the isolator, into the gate — the 53 ns worst-case tpHL is the number to use for the turn-off path. The 13 ns PWD is tight enough that you won't need to add extra dead-time margin beyond what the power stage already requires for the switch itself.
Temperature grade and approvals
The approvals from CSA, UR, and VDE mean the isolation barrier is certified to recognized safety standards, which simplifies the safety compliance submission for the end equipment.
Package and footprint
Surface-mount assembly with standard SOIC-8 wide-body footprint. The wide-body package also gives better thermal transfer to the PCB copper than a narrow-body SOIC would, though there is no exposed pad — the dissipation path is through the leads and the mold compound.