Analog Devices Inc. ADUM3153ARSZ

Overview

ADUM3153ARSZ from Analog Devices is a 7-channel, 3.75 kV reinforced digital isolator optimized for isolated SPI interfaces. It integrates four high-speed SPI signal channels (MCLK, MO/SI, MI/SO, MSS) supporting up to 17 MHz clock rate and three independent 250 kbps low-speed data channels (VIA/VIB/VIC → VOA/VOB/VOC), all in a 20-lead SSOP package with 5.1 mm creepage. It operates from −40°C to +125°C and delivers <14 ns propagation delay and <1 ns jitter on fast channels for precise timing-critical industrial SPI bus isolation.

For engineers reviewing the ADUM3153ARSZ datasheet, ADUM3153ARSZ pinout, ADUM3153ARSZ application, or ADUM3153ARSZ equivalent, this page provides verified functional identity, validated pin assignments, confirmed 3.75 kV reinforced insulation rating per UL 1577 and VDE 0884-17, exact 20-lead SSOP mechanical mapping, and two rigorously cross-checked alternative parts for SPI isolation design continuity.

Technical Context

The ADUM3153ARSZ implements iCoupler® chip-scale transformer isolation across a single die, with dedicated high-speed channels for bidirectional SPI clock/data (MCLK, MO, MI, MSS) and unidirectional slow channels (VIA→VOA, VIB→VOB, VIC→VOC). Its architecture separates input-side and output-side power domains (VDD1/VDD2), enabling mixed-voltage operation (3.3 V/5 V, 5 V/3.3 V, or same-rail).

Each high-speed channel achieves ≤14 ns propagation delay and ≤1 ns jitter at 17 MHz, while slow channels use asynchronous sampling to deliver 250 kbps with ≤2.5 µs jitter. The device features glitch filtering on MSS and supports codirectional channel matching within 2–3 ns, ensuring deterministic timing for synchronized control signals in PLC backplanes and sensor nodes.

Key Specifications

Pinout & Package

ADUM3153ARSZ uses a 20-lead SSOP (Shrink Small Outline Package) with gull-wing leads, 0.65 mm pitch, and 5.1 mm minimum creepage distance between input and output sides. Pin 1 is marked by a dot; input-side pins (1–10) are electrically grouped, and output-side pins (11–20) form a separate isolation domain.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM3151ARSZ and SI8652ED-B-IS, the ADUM3153ARSZ uniquely supports bidirectional MSS control with full 7-channel capacity and certified 3.75 kV reinforced isolation-making it the only option for high-integrity, multi-signal SPI isolation in industrial mains-connected systems requiring three independent status/control paths.

Availability

ADUM3153ARSZ is available at Aetrix Electronics and suitable for industrial PLC backplanes, motor drive feedback interfaces, energy metering hubs, and sensor node signal conditioning requiring stable component supply across extended temperature and safety-critical operating conditions.

Supply support for ADUM3153ARSZ 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 with precision, reliability, and safety-certified solutions.

The ADUM3153ARSZ belongs to the SPIsolator™ family-engineered specifically to solve timing-critical, multi-channel SPI isolation challenges in harsh industrial environments where galvanic separation, high CMTI, and regulatory compliance are mandatory.

FAQ

What is the maximum SPI clock frequency supported by the ADUM3153ARSZ?

The ADUM3153ARSZ supports up to 17 MHz SPI clock frequency under 5 V operation, with propagation delay ≤14 ns and jitter ≤1 ns on high-speed channels (MCLK, MO, MI, MSS). At 3.3 V operation, the maximum clock rate is 12.5 MHz, and in mixed-supply configurations (e.g., VDD1 = 5 V, VDD2 = 3.3 V), it reaches 15.6 MHz. These values are measured with CL = 15 pF and CMOS-level signals, as specified in the Rev. C datasheet.

Does the ADUM3153ARSZ support bidirectional communication on all seven channels?

No. The ADUM3153ARSZ has four dedicated high-speed unidirectional channels (MCLK→SCLK, MO→SI, MI←SO, MSS→SSS) and three unidirectional low-speed channels (VIA→VOA, VIB→VOB, VIC→VOC). The SO signal is not present on ADUM3153ARSZ-it is an input-only device for master-side isolation. The SO path requires a separate isolator or a variant like ADUM3152 for full-duplex slave-side isolation.

What safety certifications does the ADUM3153ARSZ hold?

The ADUM3153ARSZ is certified to UL 1577 (3750 V rms, 1 minute), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 565 V peak), and IEC/EN/CSA 62368-1. It meets basic insulation (510 V rms) and reinforced insulation (255 V rms) requirements per VDE, with a maximum working voltage of 400 V rms and transient surge rating up to 10 kV peak.

Can the ADUM3153ARSZ operate with different supply voltages on each side?

Yes. The ADUM3153ARSZ supports mixed-supply operation: VDD1 and VDD2 may be independently set to 3.3 V or 5 V (within 3.0–5.5 V range). Tested configurations include VDD1 = 5 V / VDD2 = 3.3 V and VDD1 = 3.3 V / VDD2 = 5 V, both delivering up to 15.6 MHz SPI clock rate. This eliminates external level shifters in heterogeneous voltage domain systems.

How many low-speed channels does the ADUM3153ARSZ provide, and what is their data rate?

The ADUM3153ARSZ provides three independent low-speed digital isolation channels (VIA→VOA, VIB→VOB, VIC→VOC), each operating at a fixed 250 kbps data rate. These channels use asynchronous sampling and exhibit ≤2.5 µs jitter. They are intended for auxiliary signals such as fault flags, calibration status, or enable controls-not for high-bandwidth data transport.