Analog Devices Inc. ADUM252N1BRIZ-RL

Overview

ADUM252N1BRIZ-RL from Analog Devices is a 5-channel, 5.0 kV_RMS digital isolator based on iCoupler® transformer technology, designed for high-speed signal isolation across reinforced insulation barriers. It delivers 150 Mbps guaranteed data rate, 13 ns max propagation delay at 5 V, and operates from 1.7 V to 5.5 V on both sides - enabling bidirectional level translation in industrial SPI interfaces and field bus systems.

For engineers reviewing the ADUM252N1BRIZ-RL datasheet, ADUM252N1BRIZ-RL pinout, ADUM252N1BRIZ-RL application, or ADUM252N1BRIZ-RL equivalent, key selection criteria include its 100 kV/μs common-mode transient immunity, fail-safe high/low output options, and SOIC_IC wide-body package with 8.3 mm creepage/clearance - critical for IEC 61000-4-5 surge robustness and 2 MOPP medical isolation compliance.

Technical Context

The ADUM252N1BRIZ-RL implements five independent unidirectional CMOS-isolated channels using monolithic air-core transformers, with dc-correct operation ensuring output state retention during input inactivity. Its architecture supports asymmetric supply configurations (e.g., 1.8 V side 1 / 5 V side 2) without external level shifters.

It features dual fail-safe modes (N0/N1 suffix), where ADUM252N1BRIZ-RL defaults to logic-high outputs when VDD1 is unpowered. Propagation delay matching is tightly controlled at ≤4.0 ns codirectional skew, and jitter is specified at 70 ps rms (5 V) - essential for timing-critical serial protocols like isolated SPI clock/data lanes.

Key Specifications

Pinout & Package

ADUM252N1BRIZ-RL uses a 16-lead RoHS-compliant wide-body SOIC_IC package (body width 10.3 mm), optimized for high-voltage isolation with 8.3 mm minimum creepage and clearance between input (pins 1–8) and output (pins 9–16) sides.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multichannel digital isolator applications.

Compared with ADUM252N1BRIZ-RL, the N0 variant offers complementary fail-safe polarity for reset-critical subsystems, while SI8652ED-B-IS trades VDE-reinforced certification and tighter timing for lower cost in consumer-grade applications.

Availability

ADUM252N1BRIZ-RL is available at Aetrix Electronics and suitable for industrial PLC I/O modules, isolated SPI data acquisition systems, and medical patient monitoring equipment requiring stable component supply with long-term lifecycle assurance.

Supply support for ADUM252N1BRIZ-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, headquartered in Norwood, MA.

The ADuM25xN family was engineered specifically for high-reliability, multi-channel digital isolation in safety-critical industrial, medical, and energy infrastructure systems - emphasizing low jitter, high CMTI, and regulatory-certified reinforced insulation.

FAQ

What is the fail-safe behavior of ADUM252N1BRIZ-RL when VDD1 is unpowered?

ADUM252N1BRIZ-RL is the N1 variant, meaning all five outputs (VOA–VOE) transition to and hold a logic-high state when the input-side supply (VDD1) is removed or falls below UVLO threshold (1.5 V). This ensures defined, safe operation in control systems where loss of primary power must trigger an active state - such as enabling a brake or disabling a driver. The behavior is inherent to the internal design and requires no external pull-ups.

Does ADUM252N1BRIZ-RL support bidirectional communication on any channel?

No, ADUM252N1BRIZ-RL provides five unidirectional channels only - VIA→VOA, VIB→VOB, VIC→VOC, VID→VOD, and VIE→VOE - with fixed input-to-output directionality. Bidirectional protocols like I²C require separate dedicated isolators or a different part number (e.g., ADUM1250 for dual-channel bidirectional). Attempting to drive outputs back into inputs violates absolute maximum ratings and may damage ADUM252N1BRIZ-RL.

Can ADUM252N1BRIZ-RL operate with 1.8 V on VDD1 and 5 V on VDD2 simultaneously?

Yes, ADUM252N1BRIZ-RL fully supports asymmetric supply operation: VDD1 can be 1.8 V (1.7–1.9 V range) while VDD2 is 5 V (4.5–5.5 V range). Input thresholds scale to 0.7×VDD1 (1.26 V) and 0.3×VDD1 (0.54 V), and outputs swing rail-to-rail relative to VDD2 - enabling seamless 1.8 V MCU to 5 V ADC interfacing without level-shifting circuitry. All timing specs remain valid across this configuration.

What safety certifications does ADUM252N1BRIZ-RL hold?

ADUM252N1BRIZ-RL carries pending certifications aligned with major global standards: UL 1577 (5000 V_RMS), CSA Component Acceptance Notice 5A, VDE V 0884-10 (reinforced, VIORM = 849 V_PEAK), and CQC GB4943.1-2011. It is rated for 2 MOPP per IEC 60601-1 Ed.3+A1 and meets IEC 61010-1 for measurement equipment - confirmed by the "*" marking on the package denoting VDE approval.

How does the channel-to-channel propagation delay matching affect SPI isolation performance with ADUM252N1BRIZ-RL?

ADUM252N1BRIZ-RL guarantees ≤4.0 ns codirectional propagation delay skew (tPSKCD) between any two channels - critical for SPI clock (SCLK) and data (MOSI/MISO) alignment. At 150 Mbps (6.67 ns bit period), this skew consumes <60% of the timing budget, preserving setup/hold margins even with PCB trace length mismatches. This enables reliable full-speed SPI operation without added timing compensation firmware or hardware delays.