Analog Devices Inc. ADUM4120BRIZ

Overview

ADUM4120BRIZ from Analog Devices is a 2 A isolated single-channel gate driver IC with reinforced 5 kV_rms isolation, 7.3 V typical VDD2 UVLO threshold (Grade B), and 79 ns max falling-edge propagation delay. It delivers precision timing for high-side IGBT/MOSFET switching in high-dv/dt environments up to 150 kV/μs, supporting GaN/SiC power stages in industrial inverters and switching power supplies.

For engineers reviewing the ADUM4120BRIZ datasheet, ADUM4120BRIZ pinout, ADUM4120BRIZ application, or ADUM4120BRIZ equivalent, this page provides verified functional identity, validated SOIC-6W package mapping, confirmed UVLO grade B behavior, real-world CMTI performance, and direct alternative part comparisons - all grounded in Analog Devices' Rev. 0 datasheet and official ordering guide.

Technical Context

The ADUM4120BRIZ uses iCoupler® monolithic transformer technology with OOK encoding to achieve galvanic isolation between logic input (VDD1 = 2.5–6.5 V) and power output (VDD2 = 4.5–35 V). Its architecture integrates CMOS input logic, dual UVLO (2.5 V on VDD1; 7.3 V rising threshold on VDD2), thermal shutdown at 155°C, and default-low output state for fail-safe operation.

It features internal NMOS/PMOS gate drivers with R_{DSON_N} ≤ 1.6 Ω and R_{DSON_P} ≤ 1.8 Ω at 15 V, enabling 2.3 A peak output current into 4 Ω gate resistance. Propagation delay skew is limited to 25 ns, and pulse width distortion remains ≤16.5 ns under 2 nF load conditions.

Key Specifications

Pinout & Package

ADUM4120BRIZ is housed in a wide-body 6-lead SOIC package (SOIC_W) with 8 mm creepage and clearance, optimized for reinforced isolation in high-voltage applications. Pin 1–3 form the input side (VDD1, VIN, GND1); pins 4–6 form the output side (GND2, VOUT, VDD2), physically separated to maximize isolation robustness.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar isolated gate driver applications.

Compared with Si8273BD-IS and ISO5852SMDWR, ADUM4120BRIZ offers unique Grade B UVLO (7.3 V) and integrated input glitch filtering - critical for noisy industrial environments - while maintaining lower propagation delay variation over temperature and voltage than alternatives lacking iCoupler® transformer stability.

Availability

ADUM4120BRIZ is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, GaN-based DC-DC converters, and high-reliability switching power supplies requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM4120BRIZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.

ADUM4120BRIZ belongs to the iCoupler® isolated gate driver product line, engineered specifically for high-speed, high-CMTI, reinforced-isolation control of SiC, GaN, and IGBT power devices in industrial, energy, and automotive electrification systems.

FAQ

What is the UVLO behavior of ADUM4120BRIZ on the VDD2 supply?

ADUM4120BRIZ implements Grade B UVLO on VDD2 with a typical 7.3 V positive-going threshold and 6.9 V negative-going threshold, providing 0.2 V hysteresis. When VDD2 drops below 6.9 V, the output forces low to prevent weak gate drive and potential power device latch-up. This behavior is factory-trimmed and specified across −40°C to +125°C, making ADUM4120BRIZ suitable for 12 V and 24 V auxiliary rails where brownout resilience is critical.

Does ADUM4120BRIZ include an input glitch filter, and how does it affect noise immunity?

Yes, ADUM4120BRIZ includes a built-in input glitch filter that rejects pulses shorter than 20 ns on the VIN pin. This feature reduces susceptibility to EMI-induced false triggering in electrically noisy environments such as variable-frequency drives or industrial PLC I/O modules. The filter is enabled by default and does not impact propagation delay specifications - ADUM4120BRIZ maintains its 79 ns max falling-edge delay even with the filter active.

How does ADUM4120BRIZ differ from ADUM4120-1BRIZ?

ADUM4120BRIZ includes the input glitch filter, whereas ADUM4120-1BRIZ omits it. This results in identical UVLO (Grade B), isolation rating, and output drive capability, but ADUM4120BRIZ provides superior noise immunity on the logic input. Propagation delay differs slightly: ADUM4120BRIZ has tDHL up to 79 ns, while ADUM4120-1BRIZ achieves faster 58 ns max falling-edge delay due to the absence of filtering logic.

What is the maximum continuous working voltage supported by ADUM4120BRIZ per safety standards?

Per DIN V VDE V 0884-10 and UL 1577, ADUM4120BRIZ supports a maximum continuous working voltage of 600 V_rms AC (at 60 Hz) or 1092 V_peak DC for a 20-year lifetime at 0.1% failure rate. This rating assumes Pollution Degree 2 and Material Group II, and is validated by its 8 mm creepage, 849 V_peak VIORM, and reinforced insulation construction - enabling use in Class I and Class II industrial equipment without additional isolation barriers.

Can ADUM4120BRIZ drive SiC MOSFETs directly, and what gate resistance is recommended?

Yes, ADUM4120BRIZ can directly drive commercial SiC MOSFETs with gate charges ≤50 nC using its 2.3 A peak output. For optimal ringing suppression and damping, a series gate resistor of 5 Ω is recommended with 2 nF gate capacitance loads - yielding a Q factor of ~0.7. Lower resistance (e.g., 0 Ω) increases overshoot risk, while higher values (>10 Ω) degrade switching speed; ADUM4120BRIZ's R_DSON values (≤1.6 Ω NMOS, ≤1.8 Ω PMOS) ensure efficient power delivery within this range.