Analog Devices Inc. ADUM4150BRIZ

Overview

ADUM4150BRIZ from Analog Devices is a 6-channel, 5 kV reinforced digital isolator optimized for isolated SPI interfaces, featuring four high-speed SPI signal channels (MCLK, MSS, MO/SI, MI/SO), two unidirectional 250 kbps data channels (VIA/VIB), and a dedicated delay clock (DCLK) supporting up to 40 MHz operation in delay-clock mode. It operates across −40°C to +125°C with 25 kV/µs common-mode transient immunity and meets IEC/EN/CSA 62368-1, 60601-1, and 61010-1 safety standards.

For engineers reviewing the ADUM4150BRIZ datasheet, ADUM4150BRIZ pinout, ADUM4150BRIZ application, or ADUM4150BRIZ equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior under mixed-voltage operation (3.3 V/5 V), regulatory compliance mapping, and validated alternative options for industrial PLC and sensor isolation designs.

Technical Context

The ADUM4150BRIZ implements iCoupler® chip-scale transformer isolation with separate high-speed and low-speed channel architectures: four bidirectional SPI signal paths achieve ≤13 ns propagation delay and 1 ns jitter at 17 MHz, while two independent slow channels use internal sampling/serialization for 250 kbps with 2.5 µs jitter. Its delay clock output (DCLK) compensates for round-trip propagation (tPMCLK + tPSO), enabling 40 MHz SPI clocking on the primary side when paired with a second clocked port.

It supports asymmetric supply configurations (e.g., VDD1 = 5 V / VDD2 = 3.3 V), maintains logic thresholds at 0.7×VDDx/0.3×VDDx, and guarantees glitch filtering on MSS across all speed grades-critical for reliable slave-select timing in noisy industrial environments.

Key Specifications

Pinout & Package

ADUM4150BRIZ uses a 20-lead SOIC_IC package with 8.3 mm creepage and reinforced insulation barrier separating pins 1–10 (Side 1 / Primary) from pins 11–20 (Side 2 / Secondary).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM4150BRIZ, ADUM4151BRIZ removes delay-clock functionality while retaining full SPI channel count and isolation rating, whereas ADUM3150ARIZ reduces both isolation strength and timing capability-making ADUM4150BRIZ the sole option for 40 MHz delay-clock–enabled, 5 kV–reinforced SPI isolation.

Availability

ADUM4150BRIZ is available at Aetrix Electronics and suitable for industrial programmable logic controllers (PLC), sensor isolation interfaces, motor drive feedback systems, and medical imaging data acquisition requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADUM4150BRIZ 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 precision instrumentation, industrial automation, and healthcare markets since 1965.

The ADuM4150 product line delivers reinforced-isolation SPI solutions targeting safety-critical industrial and medical systems where timing determinism, regulatory compliance, and high common-mode noise rejection are mandatory design requirements.

FAQ

What is the maximum SPI clock rate supported by ADUM4150BRIZ in delay clock mode?

ADUM4150BRIZ supports up to 40 MHz SPI clock operation in delay clock mode, enabled by its dedicated DCLK output that compensates for round-trip propagation delay (tPMCLK + tPSO). This capability is confirmed in the Rev. E datasheet Table 2 and General Description section, and applies specifically to the ADUM4150BRIZ grade with 20-lead SOIC_IC packaging and 5 kV isolation rating.

Does ADUM4150BRIZ support mixed 3.3 V and 5 V supply operation?

Yes, ADUM4150BRIZ supports mixed-supply operation with VDD1 = 5 V and VDD2 = 3.3 V (or vice versa), as documented in Tables 6 and 8 of the Rev. E datasheet. It maintains valid logic thresholds (VIH = 0.7×VDDx, VIL = 0.3×VDDx), 15.6 MHz SPI clock rate, and 250 kbps slow-channel performance under this configuration-eliminating external level shifters in heterogeneous voltage systems.

How does the MSS signal differ from other fast SPI channels in ADUM4150BRIZ?

The MSS (Master Slave Select) signal in ADUM4150BRIZ is hardware-glitch filtered in both A and B speed grades, unlike MCLK, MO/SI, and MI/SO which are unfiltered in B grade. This ensures reliable slave-select assertion in electrically noisy environments like PLC backplanes, as specified in Table 2 footnote 2 and the General Description section of the ADUM4150BRIZ datasheet.

What safety certifications apply to ADUM4150BRIZ?

ADUM4150BRIZ holds UL 1577 (5000 V rms), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (2-MOPP), IEC/CSA 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) approvals, with VIORM = 645 V peak and reinforced insulation classification. These are explicitly listed in Table 11 and Regulatory Information sections of the official ADUM4150BRIZ datasheet Rev. E.

Can ADUM4150BRIZ replace ADUM3150ARIZ in an existing design?

ADUM4150BRIZ is not a direct drop-in replacement for ADUM3150ARIZ due to differences in isolation rating (5 kV vs. 3.75 kV) and DCLK functionality. While pin-compatible, ADUM4150BRIZ requires validation of safety margins and timing paths-especially if leveraging the 40 MHz delay-clock mode absent in ADUM3150ARIZ. The datasheet confirms distinct certification scopes and operating limits.