Analog Devices Inc. ADUM3152ARSZ

Overview

ADUM3152ARSZ from Analog Devices is a 7-channel, 3.75 kV reinforced digital isolator optimized for SPI bus isolation. It integrates four high-speed bidirectional SPI signal channels (MCLK, MO/SI, MI/SO, MSS/SS) and three unidirectional 250 kbps auxiliary data channels (VIA/VIB/VIC → VOA/VOB/VOC), all operating up to 125°C ambient temperature in industrial PLCs and sensor front-ends.

For engineers reviewing the ADUM3152ARSZ datasheet, ADUM3152ARSZ pinout, ADUM3152ARSZ application, or ADUM3152ARSZ equivalent, this device delivers deterministic timing with ≤14 ns propagation delay on fast channels, <2.5 µs jitter on slow channels, and >25 kV/µs common-mode transient immunity-critical for noise-immune SPI communication across isolated power domains.

Technical Context

The ADUM3152ARSZ implements iCoupler® chip-scale transformer isolation with separate input-side (Side 1) and output-side (Side 2) power domains. Its four fast channels use synchronous sampling architecture to support SPI clock rates up to 17 MHz at 5 V operation, while three slow channels employ asynchronous serialization for 250 kbps data transfer with glitch filtering on MSS.

It supports mixed-voltage operation (3.3 V/5 V or 5 V/3.3 V across sides), features undervoltage lockout at 2.6 V per supply, and maintains reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 565 V peak and 3750 V rms withstand rating.

Key Specifications

Pinout & Package

ADUM3152ARSZ is housed in a 20-lead SSOP package (5.1 mm creepage) with gull-wing leads. Side 1 (pins 1–10) contains inputs MCLK, MO, MSS, VIA, VIB, VIC, and power/ground; Side 2 (pins 11–20) contains outputs SCLK, MI, SSS, VOA, VOB, VOC, and complementary power/ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM3152ARSZ, ADUM3151ARSZ omits SSS output but saves ~0.5 mA quiescent current, while ISO6760RGER offers higher raw speed but requires external design effort to replicate SPI timing robustness and auxiliary channel functionality.

Availability

ADUM3152ARSZ is available at Aetrix Electronics and suitable for industrial PLCs, sensor interface modules, motor drive control boards, and energy meter communication subsystems requiring stable component supply across extended temperature and high-noise environments.

Supply support for ADUM3152ARSZ 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 since 1965.

The ADuM315x family was designed specifically to solve SPI isolation challenges in industrial automation-integrating protocol-aware timing, mixed-voltage support, and reinforced safety certification into a single compact package.

FAQ

What is the maximum SPI clock frequency supported by ADUM3152ARSZ?

ADUM3152ARSZ supports up to 17 MHz SPI clock frequency when operated at 5 V on both sides. At 3.3 V operation, the maximum clock rate is 12.5 MHz, and in mixed-voltage configurations (e.g., 5 V/3.3 V), it achieves 15.6 MHz. These values are specified in the datasheet's switching characteristics tables and reflect guaranteed timing performance under recommended operating conditions.

Does ADUM3152ARSZ support independent power supplies on each side?

Yes, ADUM3152ARSZ supports fully independent VDD1 and VDD2 supplies ranging from 3.0 V to 5.5 V each. This enables true galvanic isolation between domains-for example, powering Side 1 from a 3.3 V MCU rail and Side 2 from a 5 V sensor or actuator supply-without requiring level shifters or shared ground references.

How many isolation channels does ADUM3152ARSZ provide, and what are their functions?

ADUM3152ARSZ provides seven total isolation channels: four high-speed bidirectional SPI signal channels (MCLK/SCLK, MO/MI, MSS/SSS) and three unidirectional 250 kbps auxiliary data channels (VIA→VOA, VIB→VOB, VIC→VOC). The fast channels maintain precise timing for SPI transactions, while the slow channels carry non-critical status, configuration, or alarm signals.

What safety certifications does ADUM3152ARSZ hold?

ADUM3152ARSZ is certified to UL 1577 (3750 V rms for 1 minute), IEC/EN/CSA 62368-1 (basic insulation), and DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation with VIORM = 565 V peak. These approvals validate its suitability for safety-critical industrial equipment requiring reinforced isolation barriers.

Can ADUM3152ARSZ be used in systems operating above 85°C ambient temperature?

Yes, ADUM3152ARSZ is rated for continuous operation from −40°C to +125°C ambient temperature. Its thermal design and packaging have been validated for high-temperature industrial applications such as motor drive control boards and enclosed PLC backplanes where internal temperatures exceed 85°C.