Analog Devices Inc. ADUM2250ARIZ-RL

Overview

ADUM2250ARIZ-RL from Analog Devices is a hot-swappable, dual-channel, bidirectional I²C digital isolator with 5 kV rms reinforced isolation, 1000 kHz maximum data rate, 3.0–5.5 V dual supply operation, and 30 mA current sink capability on Side 2. It enables isolated I²C communication in power supplies and networking equipment where bus integrity during live insertion is critical.

For engineers reviewing the ADUM2250ARIZ-RL datasheet, ADUM2250ARIZ-RL pinout, ADUM2250ARIZ-RL application, or ADUM2250ARIZ-RL equivalent, this page delivers verified specifications, validated pin functions, confirmed safety certifications (UL 1577, VDE 0884-17), exact package mapping (RI-16-2), and real-world I²C isolation design constraints including open-drain interface behavior, startup sequencing, and side-specific logic thresholds.

Technical Context

The ADUM2250ARIZ-RL implements two fully bidirectional I²C channels using iCoupler® chip-scale transformer technology, eliminating need for external signal splitting. Its nonlatching architecture prevents bus lock-up during hot-swap events, and internal undervoltage lockout ensures both VDD1 and VDD2 ≥2.5 V before enabling signal transfer.

Side 1 features modified input/output thresholds (VSDA1IL = 500–700 mV, ΔVSDA1 = 50 mV) to avoid latch-up, while Side 2 complies fully with I²C standard (VSDA2IL = 0.3×VDD2, 30 mA sink). Propagation delays range from 31 ns (SCL2→SCL1 rising) to 340 ns (SCL1→SCL2 falling at 3 V), with PWD up to 215 ns at 3 V operation.

Key Specifications

Pinout & Package

ADUM2250ARIZ-RL uses the RI-16-2 package: 16-lead SOIC wide-body with enhanced creepage (8.7 mm) and reinforced insulation rating. Pin 1 and Pin 7 are internally connected GND1; Pin 9 and Pin 16 are internally connected GND2. NC pins (2,4,8,10,13,15) must remain unconnected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar I²C isolation applications.

Compared with SI8622ED-B-IS and ISO1541DR, ADUM2250ARIZ-RL uniquely combines 5 kV rms + VDE 0884-17 reinforced certification, 8.7 mm creepage, and integrated hot-swap protection - making it the only option qualified for IEC 60601-1 2 MOPP medical and high-reliability industrial I²C isolation.

Availability

ADUM2250ARIZ-RL is available at Aetrix Electronics and suitable for industrial power supplies, medical diagnostics equipment, network infrastructure modules, and energy metering systems requiring stable component supply with long-term lifecycle assurance.

Supply support for ADUM2250ARIZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADuM2250 product line delivers robust, certified I²C isolation using iCoupler® technology - designed specifically for hot-swappable, safety-critical, and noise-immune communication in power conversion, medical, and networking systems.

FAQ

What is the isolation voltage rating of ADUM2250ARIZ-RL and which safety standards does it meet?

ADUM2250ARIZ-RL is rated for 5000 V rms isolation per UL 1577 (1-minute test) and VIORM = 645 V peak per DIN EN IEC 60747-17 (VDE 0884-17). It meets IEC/EN/CSA 62368-1 (reinforced, 435 Vrms), IEC/CSA 60601-1 (2 MOPP, 250 Vrms), and IEC/CSA 61010-1 (reinforced, 300 Vrms). The RI-16-2 package provides 8.7 mm creepage and clearance for reinforced insulation compliance.

How does ADUM2250ARIZ-RL support hot-swap functionality in live I²C buses?

ADUM2250ARIZ-RL incorporates internal undervoltage lockout that disables signal transfer until both VDD1 and VDD2 exceed 2.5 V and remain stable for ≥40 μs after crossing 2.0 V. During power-up/power-down, outputs are held high to prevent bus contention. This eliminates data glitches when inserting unpowered cards onto an active I²C bus - a core requirement for modular telecom and server systems.

What are the key differences between Side 1 and Side 2 I²C interfaces on ADUM2250ARIZ-RL?

Side 1 (SDA1/SCL1) uses modified thresholds (500–700 mV input low, 600–900 mV output low) to prevent latch-up and is I²C-compatible only. Side 2 (SDA2/SCL2) meets full I²C specification: 0.3×VDD2 input low threshold, 400 mV output low at 30 mA sink, and supports direct connection to standard peripherals. This asymmetry enables safe bridging between legacy and compliant I²C domains.

Can ADUM2250ARIZ-RL operate at 3.3 V and 5 V simultaneously on different sides?

Yes. ADUM2250ARIZ-RL supports independent 3.0–5.5 V supplies on VDD1 and VDD2. Side 1 can run at 3.3 V while Side 2 operates at 5 V - enabling seamless interfacing between low-voltage microcontrollers and 5 V I²C peripherals. Electrical characteristics (e.g., 30 mA sink on Side 2) are guaranteed across the full supply range, with no performance degradation.

What is the maximum capacitive load supported on each side of ADUM2250ARIZ-RL at 1000 kHz?

At 1000 kHz, ADUM2250ARIZ-RL supports CL1 ≤40 pF on Side 1 and CL2 ≤400 pF on Side 2. These values are defined by rise/fall time limits (tf1 ≤120 ns, tf2 ≤120 ns) and drive strength. For lower-speed operation (e.g., 100 kbps standard mode), Side 1 supports up to 1600 pF with 1.6 kΩ pull-up at 5 V - enabling longer traces or multiple slaves on the isolated segment.