Analog Devices Inc. ADUM4120BRIZ-RL

Overview

ADUM4120BRIZ-RL from Analog Devices is a single-channel, isolated precision gate driver IC with 2.3 A peak output current, 79 ns maximum propagation delay (falling edge), and 150 kV/μs common-mode transient immunity. It features reinforced 5 kV rms isolation in a wide-body 6-lead SOIC package and supports VDD1 = 2.5–6.5 V and VDD2 = 4.5–35 V for driving IGBTs and SiC/GaN power devices in high-voltage switching topologies.

For engineers reviewing the ADUM4120BRIZ-RL datasheet, ADUM4120BRIZ-RL pinout, ADUM4120BRIZ-RL application, or ADUM4120BRIZ-RL equivalent, this part delivers precise timing control, grade-B UVLO (7.3 V rising threshold on VDD2), glitch-filtered CMOS input logic, and thermal shutdown protection - critical for reliable half-bridge and industrial inverter gate drive design.

Technical Context

The ADUM4120BRIZ-RL uses iCoupler® chip-scale transformer isolation to transmit gate control signals across a reinforced insulation barrier, eliminating level-shifting circuitry while maintaining galvanic separation between low-voltage logic and high-side power domains. Its architecture integrates an OOK encoder, decoder, UVLO comparators for both sides, and thermal shutdown logic.

It implements a default-low output state during undervoltage or unpowered conditions, ensuring fail-safe operation for enhancement-mode power devices. The device includes internal NMOS and PMOS gate drivers with RDSON_N ≤ 1.6 Ω and RDSON_P ≤ 1.8 Ω at 15 V VDD2, enabling fast turn-on/turn-off of high-capacitance gates under 2 nF load conditions.

Key Specifications

Pinout & Package

ADUM4120BRIZ-RL is housed in a wide-body 6-lead SOIC package (SOIC_WB) with 8 mm minimum creepage and clearance, optimized for reinforced isolation in high-voltage applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4120ARIZ-RL and ADUM4120-1BRIZ-RL, the ADUM4120BRIZ-RL uniquely balances noise immunity (glitch filter), system-level brown-out tolerance (7.3 V VDD2 UVLO), and timing performance - making it optimal for industrial 12 V auxiliary supply environments where reliability trumps minimal delay.

Availability

ADUM4120BRIZ-RL is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, EV onboard chargers, and high-density switch-mode power supplies requiring stable component supply across extended product lifecycles.

Supply support for ADUM4120BRIZ-RL 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision signal chain and power management applications.

The ADUM4120BRIZ-RL belongs to Analog Devices' iCoupler® isolated gate driver product line, engineered specifically for robust, high-speed, and safety-certified control of wide-bandgap power devices in harsh industrial and energy infrastructure systems.

FAQ

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

The ADUM4120BRIZ-RL implements grade-B undervoltage lockout on VDD2 with a typical positive-going threshold of 7.3 V and negative-going threshold of 6.9 V, providing 0.2 V hysteresis. When VDD2 falls below 6.9 V, VOUT is forced low to prevent erratic gate drive; recovery occurs only after VDD2 exceeds 7.3 V. This behavior is confirmed in Table 1 and Section "Undervoltage Lockout (UVLO)" of the ADUM4120/ADUM4120-1 datasheet Rev. 0.

Does the ADUM4120BRIZ-RL support both N-channel and P-channel MOSFET gate driving?

The ADUM4120BRIZ-RL is designed as a single-channel, low-side referenced, high-side gate driver with push-pull output stage optimized for N-channel MOSFETs and IGBTs. It sources and sinks up to 2.3 A peak current but does not support direct P-channel high-side drive without external level-shifting circuitry. Its output topology matches standard N-channel gate requirements as described in the "Output Load Characteristics" section and Figure 23 of the datasheet.

What is the maximum recommended switching frequency when using the ADUM4120BRIZ-RL with a 2 nF gate load?

Based on thermal limits and propagation delay stability, the ADUM4120BRIZ-RL supports continuous operation up to 1 MHz with a 2 nF gate load and 5 Ω series resistor, as validated in Figures 11 and 12 of the datasheet. At higher frequencies, junction temperature must be monitored using θJA = 123.7°C/W; exceeding 125°C ambient plus self-heating triggers thermal shutdown. Derating is required above 500 kHz for sustained 100% duty cycle.

How does the glitch filter in the ADUM4120BRIZ-RL affect input timing?

The ADUM4120BRIZ-RL incorporates a 20 ns deglitch window on the VIN pin, rejecting noise pulses shorter than this duration. This adds negligible delay to valid logic transitions but ensures immunity to EMI-induced false triggering. As stated in Table 1 "Switching Specifications", tIN_IN and tIN_NIN are both 20 ns - confirming the filter's fixed rejection window without altering functional propagation delay metrics like tDLH or tDHL.

Is the ADUM4120BRIZ-RL pin-compatible with other members of the ADUM4120 family?

Yes, all ADUM4120 and ADUM4120-1 variants - including ADUM4120ARIZ-RL, ADUM4120CRIZ-RL, and ADUM4120-1BRIZ-RL - share identical 6-lead SOIC_WB pinout, footprint, and terminal assignments per Figure 3 and Table 10 of the datasheet. This allows direct substitution within the same grade (A/B/C) and glitch filter option (standard vs. -1), provided UVLO thresholds and timing requirements align with system needs.