Analog Devices Inc. ADUM3123CRZ

Overview

ADUM3123CRZ from Analog Devices is a single-channel, isolated precision gate driver IC with 4.0 A pulsed output current, 3000 V_rms reinforced isolation, and 64 ns maximum propagation delay. It features CMOS input logic (3.3 V–5.5 V compatible), 4.5 V–18 V output drive capability, and integrated undervoltage lockout on both sides-designed for high-reliability IGBT/MOSFET gate control in industrial inverters and switching power supplies.

For engineers reviewing the ADUM3123CRZ datasheet, ADUM3123CRZ pinout, ADUM3123CRZ application, or ADUM3123CRZ equivalent, key selection criteria include its 565 V_peak VIORM rating, >25 kV/µs common-mode transient immunity, thermal shutdown at 150°C, and narrow-body 8-lead SOIC package with certified reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17).

Technical Context

The ADUM3123CRZ integrates iCoupler® monolithic transformer isolation with high-speed CMOS circuitry to deliver galvanic separation between input and output domains. Its architecture supports true unidirectional signal transmission with default-low output state and active-disable functionality via the DISABLE pin.

It operates across −40°C to +125°C junction temperature, delivers precise timing with ≤12 ns propagation delay skew, and maintains stable output drive under fast dv/dt transients up to ±25 kV/µs. The device implements refresh-based DC correctness and watchdog timeout behavior to ensure fail-safe low-state defaults during input-side power loss or signal stall.

Key Specifications

Pinout & Package

Narrow-body 8-lead SOIC package (SOIC_N) with creepage/clearance ≥4 mm and internal insulation gap ≥18 µm per IEC 62368-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with Si8233ABD-IS and ISO5852SMDWR, the ADUM3123CRZ uniquely combines 4.0 A pulsed drive, dual-supply UVLO, VDE 0884-17 certification, and an integrated DISABLE pin-making it optimal for safety-critical, high-power-density industrial inverters where timing precision and fault resilience are non-negotiable.

Availability

ADUM3123CRZ is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and uninterruptible power supplies requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM3123CRZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.

The ADUM3123CRZ belongs to Analog Devices' iCoupler® isolated gate driver product line, engineered specifically for high-reliability, high-speed power conversion systems demanding certified reinforced isolation and precise timing control.

FAQ

What is the maximum continuous output voltage rating for ADUM3123CRZ?

The ADUM3123CRZ has a maximum continuous working insulation voltage (VIOWM) of 400 V_rms, and a reinforced isolation peak voltage rating (VIORM) of 565 V_peak per DIN EN IEC 60747-17 (VDE 0884-17). This allows safe operation with output-side potentials up to ±380 V_rms relative to the input side, making it suitable for 400 V AC and 600 V DC bus applications. These ratings are validated through 100% production partial discharge testing at 1059 V_peak.

Does ADUM3123CRZ support 3.3 V logic input without level shifting?

Yes, ADUM3123CRZ supports 3.3 V logic input directly. Its CMOS-compatible input threshold is defined as VIH = 0.7 × VDD1 and VIL = 0.3 × VDD1, so with VDD1 = 3.3 V, VIH = 2.31 V and VIL = 0.99 V - fully compatible with standard 3.3 V logic families. Input leakage remains below ±10 µA across temperature, ensuring robust noise margins without external biasing or translation.

How does the DISABLE pin function on ADUM3123CRZ?

The DISABLE pin on ADUM3123CRZ is active-low: pulling it high forces the VO output to a default low state within 3 µs, independent of VI input state. When pulled low, normal input-to-output signal transmission resumes within 1 µs. This pin provides hardware-level fail-safe control - essential for emergency stop circuits or system-level interlocks. It operates independently of VDD1/VDD2 UVLO conditions and remains functional across the full −40°C to +125°C range.

What thermal derating applies to ADUM3123CRZ at elevated ambient temperatures?

ADUM3123CRZ has a junction-to-ambient thermal resistance (θ_JA) of 95°C/W. At 25°C ambient, with typical power dissipation (~10 mW quiescent + dynamic load), junction temperature stays well below 125°C. Above 85°C ambient, thermal derating becomes critical: for example, at 100°C ambient and 1 W total dissipation, junction temperature reaches ~195°C - exceeding the 150°C shutdown threshold. Therefore, board-level heatsinking, airflow, or reduced switching frequency is required above 85°C ambient to maintain reliability.

Is ADUM3123CRZ pin-compatible with other members of the ADuM312x family?

Yes, ADUM3123CRZ is pin-compatible with ADUM3120CRZ, ADUM3121CRZ, and ADUM3122CRZ - all share identical 8-lead SOIC_N pinout, VDD1/VDD2/GND1/GND2/VI/VO/DISABLE/NIC assignments. Differences lie in output drive strength (2 A vs. 4 A), propagation delay (75 ns vs. 64 ns), and grade-specific UVLO thresholds. This allows direct substitution in existing layouts when upgrading performance or adjusting safety margins without PCB revision.