Analog Devices Inc. ADUM252N0BRIZ-RL

Overview

ADUM252N0BRIZ-RL from Analog Devices is a 5-channel, 5.0 kV_RMS reinforced digital isolator based on iCoupler® transformer technology. It provides bidirectional signal isolation with 150 Mbps guaranteed data rate, 13 ns max propagation delay at 5 V, and 100 kV/μs common-mode transient immunity-designed for SPI bus isolation in industrial PLC I/O modules.

For engineers reviewing the ADUM252N0BRIZ-RL datasheet, ADUM252N0BRIZ-RL pinout, ADUM252N0BRIZ-RL application, or ADUM252N0BRIZ-RL equivalent, key selection criteria include fail-safe output configuration (N0 = default high), 1.7–5.5 V dual-supply operation with level translation, and SOIC_IC wide-body package compliance with VDE V 0884-10 reinforced insulation.

Technical Context

The ADUM252N0BRIZ-RL implements five independent unidirectional channels using monolithic air-core transformers and CMOS interface circuitry. Its functional block diagram shows three input-side encode paths (VIA–VIC) and two output-side decode paths (VOD–VOE), with dedicated NIC pins enabling fail-safe high-state behavior when input power is absent.

Unlike optocouplers, it guarantees DC correctness without input transitions and supports simultaneous 1.8 V/3.3 V/5 V level translation across the isolation barrier. Propagation delay matching is tight at ≤4.0 ns (codirectional), and jitter is specified at 70 ps RMS at 5 V operation.

Key Specifications

Pinout & Package

ADUM252N0BRIZ-RL uses a RoHS-compliant 16-lead wide-body SOIC_IC package (RI-16), with input-side pins (1–8) physically and electrically isolated from output-side pins (9–16). The package meets DIN V VDE V 0884-10 reinforced insulation requirements and provides 8.3 mm minimum creepage and clearance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM252N0BRIZ-RL, the ADUM252N1BRIZ-RL offers inverted fail-safe polarity for complementary safety logic, while SI8652ED-B-IS trades lower CMTI and no native fail-safe for potentially lower unit cost in less demanding noise environments.

Availability

ADUM252N0BRIZ-RL is available at Aetrix Electronics and suitable for industrial PLC I/O modules, motor drive gate driver interfaces, SPI-isolated data acquisition systems, and RS-485 fieldbus nodes requiring stable component supply and long-term lifecycle support.

Supply support for ADUM252N0BRIZ-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 delivers robust, high-speed digital isolation for industrial, automotive, and medical systems where safety, reliability, and timing precision are critical.

FAQ

What is the fail-safe behavior of ADUM252N0BRIZ-RL?

The ADUM252N0BRIZ-RL is the N0 variant, meaning its outputs default to logic high when the input-side supply (VDD1) is unpowered or below UVLO threshold. This behavior is enabled by connecting NIC to GND1 and ensures safe deactivation of downstream circuitry-such as disabling gate drivers in motor inverters-during controller power loss. The ADUM252N0BRIZ-RL maintains this state without external components.

Does ADUM252N0BRIZ-RL support level translation between different supply voltages?

Yes, ADUM252N0BRIZ-RL supports independent 1.7 V to 5.5 V supplies on each side (VDD1 and VDD2), enabling seamless level translation-for example, interfacing a 1.8 V FPGA I/O bank with a 5 V analog subsystem. Input thresholds scale with VDDx (VIH = 0.7×VDDx), and output drive strength adapts to the local VDD2 rail, eliminating need for external level shifters in ADUM252N0BRIZ-RL designs.

What safety certifications apply to ADUM252N0BRIZ-RL?

ADUM252N0BRIZ-RL is certified to UL 1577 (5000 V_RMS/1 min), VDE V 0884-10 (reinforced, VIORM = 849 V_PEAK), CSA Component Acceptance Notice 5A, and CQC GB4943.1-2011. The "*" marking on the package denotes VDE approval. These certifications validate its use in 2 MOPP medical equipment and 415 V_RMS industrial mains interfaces per ADUM252N0BRIZ-RL datasheet Table 11.

How does ADUM252N0BRIZ-RL achieve high common-mode transient immunity?

ADUM252N0BRIZ-RL achieves 100 kV/μs CMTI through differential transformer coupling and proprietary noise-rejection circuitry in its iCoupler® architecture. Unlike optocouplers, it rejects fast common-mode edges by sensing differential signal content across the isolation barrier-not absolute voltage-making it immune to ground bounce and switching noise in high-power inverters. This performance is verified per ADUM252N0BRIZ-RL datasheet Table 1.

Can ADUM252N0BRIZ-RL replace optocouplers in existing designs?

Yes, ADUM252N0BRIZ-RL can replace multi-channel optocouplers (e.g., 6N137-based arrays) with significant benefits: no LED aging, 10× higher speed (150 Mbps vs. ~10 Mbps), lower power (quiescent current <4 mA/side), and tighter timing specs (≤4.0 ns channel skew). However, PCB layout must observe 8.3 mm creepage/clearance and avoid copper under the isolation barrier-requirements distinct from ADUM252N0BRIZ-RL's SOIC_IC footprint.