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Home > Products > Isolators > Digital Isolators

Analog Devices Inc. ADUM7442CRQZ

Name: ADUM7442CRQZ
Brand: Analog Devices Inc.
SKU: ADUM7442CRQZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADUM7442CRQZ

Manufacturer:: Analog Devices Inc.

Category:: Digital Isolators

Package:: 16-SSOP (0.154", 3.90mm Width)

Datasheet:: ADUM7442CRQZ.pdf

Description:: DGTL ISO 1000VRMS 4CH GP 16QSOP

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Product details

Overview

ADUM7442CRQZ from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based isolation, providing 1 kV_RMS galvanic isolation between two independent 3.0–5.5 V domains. It supports bidirectional NRZ data transmission up to 25 Mbps, features 3 V/5 V level translation, and delivers low pulse width distortion (<5 ns, C grade) with high common-mode transient immunity (>15 kV/µs). It is used in isolated SPI interfaces for industrial PLC I/O modules.

For engineers reviewing the ADUM7442CRQZ datasheet, ADUM7442CRQZ pinout, ADUM7442CRQZ application, or ADUM7442CRQZ equivalent, key selection criteria include channel direction configuration (A/B inputs, C/D outputs), supply current at 25 Mbps (15 mA input / 12 mA output, 3.3 V side), propagation delay skew (<10 ns, C grade), and QSOP-16 package compatibility with space-constrained PCB layouts.

Technical Context

The ADUM7442CRQZ implements four independent unidirectional channels with fixed directionality: Pins 3–4 (VIA, VIB) and 11–12 (VOC, VOD) are inputs; Pins 5–6 (VOC, VOD) and 11–12 (VID, VIC) are outputs - specifically configured as two input channels on Side 1 and two output channels on Side 2. Its monolithic air-core transformer isolation architecture eliminates LED aging and timing drift inherent in optocouplers.

It operates across dual independent supplies (VDD1 and VDD2), each ranging 3.0–5.5 V, enabling true level-shifting across the barrier. The device includes an input glitch filter and default-high output state during input-side power loss, supporting fail-safe behavior in industrial control systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 25 Mbps NRZ - supports high-speed SPI clock and data lines without oversampling or encoding.
Isolation Rating	1000 V_RMS - certified to UL 1577, enabling use in functional isolation applications requiring reinforced insulation per IEC 61000-4-5.
Pulse Width Distortion	<5 ns (C grade) - ensures minimal duty-cycle error in PWM or clock forwarding applications.
Common-Mode Transient Immunity	>15 kV/µs - maintains signal integrity in noisy motor drive or power converter environments.
Supply Current @ 25 Mbps	15 mA (VDD1, 3.3 V) / 12 mA (VDD2, 3.3 V) - enables low-power isolated communication in battery-backed or energy-sensitive nodes.
Propagation Delay Skew	<10 ns (C grade, codirectional) - guarantees tight timing alignment across multiple isolated data lanes (e.g., SPI MISO/MOSI).
Operating Temperature	−40°C to +105°C - qualified for extended industrial ambient conditions without derating.

Pinout & Package

ADUM7442CRQZ is housed in a 16-lead QSOP package (5.3 mm × 10.2 mm, 1.0 mm height), offering ~70% board area reduction versus standard wide SOIC-16 isolators while maintaining 3.55 mm creepage/clearance for 1 kV_RMS safety compliance.

Pin/Terminal	Circuit Role	Design Meaning
1, 7	VDD1A / VDD1B	Input-side dual supply pins - externally shorted; require local 0.01–0.1 µF bypass to GND1 (Pins 2/8) for stable high-speed operation.
2, 8	GND1	Input-side ground reference - internally connected; both must be tied to same low-impedance ground plane.
3, 4	VIA, VIB	Input channels A and B - accept CMOS logic levels referenced to VDD1; support 0–25 Mbps NRZ signals.
5, 6	VOC, VOD	Output channels C and D - drive CMOS loads on output side (VDD2/GND2); default high when VDD1 unpowered.
9, 15	GND2	Output-side ground reference - internally connected; must be isolated from GND1 by ≥3.55 mm clearance.
10, 16	VDD2B / VDD2A	Output-side dual supply - externally shorted; bypassed to GND2 (Pins 9/15) for noise immunity.
11, 12	VID, VIC	Input channels D and C - referenced to VDD2; enable reverse-direction signaling (e.g., status feedback across barrier).
13, 14	VOB, VOA	Output channels B and A - deliver isolated logic outputs referenced to VDD2; match input timing within <10 ns skew.

Key Features

Feature	Design Value
iCoupler® transformer isolation	Eliminates LED degradation and lifetime uncertainty of optocouplers; supports >50-year insulation lifetime per DIN VDE V 0884-17.
Configurable supply domains	VDD1 and VDD2 independently support 3.0–5.5 V - enables 3.3 V MCU to communicate with 5 V ADC or actuator driver without external level shifters.
Input glitch filter	Rejects sub-10 ns noise transients on VIA/VIB/VID/VIC - prevents false triggering in electrically noisy factory-floor environments.
Fail-safe output default	All outputs go high-impedance if VDD2 is lost, or default high if VDD1 is lost - ensures predictable state during partial power failure.
Low dynamic power	0.17–0.26 mA/Mbps (input), 0.02–0.03 mA/Mbps (output) - reduces thermal load in dense multi-isolator designs.

Applications

SPI Isolation for Industrial Data Acquisition	RS-485 Transceiver Isolation
Use Scenario: Isolating SPI bus between a 3.3 V ARM Cortex-M4 microcontroller and a 5 V, 16-bit SAR ADC in a programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: ADUM7442CRQZ provides galvanic separation for SCLK, MOSI, MISO, and CS lines - preserving full-duplex timing integrity with <10 ns inter-channel skew. Use Value: Enables safe, high-resolution sensor data acquisition in 1000 V_RMS-rated industrial equipment without compromising 25 Mbps throughput or introducing jitter-induced sampling errors.	Use Scenario: Isolating control and status signals between a 3.3 V UART and a 5 V RS-485 transceiver (e.g., ADM3485E) in a distributed I/O node. IC Role / Device Role / Timing Role: ADUM7442CRQZ isolates TX, RX, DE, and RE lines - supporting half-duplex RS-485 timing with guaranteed 25 Mbps edge rates and <5 ns pulse width distortion. Use Value: Prevents ground loop currents and common-mode noise from disrupting serial communication over long cable runs in factory automation networks.
Motor Drive Gate Driver Interface	Isolated CAN Node Power Domain Separation
Use Scenario: Isolating PWM signals from a 3.3 V DSP to six-pack IGBT gate drivers in a variable-frequency drive (VFD), where high dv/dt noise exceeds 15 kV/µs. IC Role / Device Role / Timing Role: ADUM7442CRQZ carries three complementary PWM pairs (A/B, C/D, VOA/VOB) across the barrier - maintaining precise dead-time control via matched propagation delays. Use Value: Ensures reliable switching of high-power inverters under extreme EMI conditions, eliminating false turn-on due to common-mode transients.	Use Scenario: Separating the 3.3 V CAN controller (e.g., MCP2515) from a 5 V CAN transceiver (e.g., SN65HVD230) in an automotive diagnostic tool with external 12 V supply. IC Role / Device Role / Timing Role: ADUM7442CRQZ isolates CAN TXD/RXD and transceiver control lines - enabling voltage translation while meeting ISO 11898-2 common-mode range requirements. Use Value: Provides robust fault containment between vehicle battery domain and low-voltage microcontroller domain, preventing latch-up during load dump events.

SPI Isolation for Industrial Data Acquisition

RS-485 Transceiver Isolation

Use Scenario: Isolating SPI bus between a 3.3 V ARM Cortex-M4 microcontroller and a 5 V, 16-bit SAR ADC in a programmable logic controller (PLC) analog input module.

IC Role / Device Role / Timing Role: ADUM7442CRQZ provides galvanic separation for SCLK, MOSI, MISO, and CS lines - preserving full-duplex timing integrity with <10 ns inter-channel skew.

Use Value: Enables safe, high-resolution sensor data acquisition in 1000 V_RMS-rated industrial equipment without compromising 25 Mbps throughput or introducing jitter-induced sampling errors.

Use Scenario: Isolating control and status signals between a 3.3 V UART and a 5 V RS-485 transceiver (e.g., ADM3485E) in a distributed I/O node.

IC Role / Device Role / Timing Role: ADUM7442CRQZ isolates TX, RX, DE, and RE lines - supporting half-duplex RS-485 timing with guaranteed 25 Mbps edge rates and <5 ns pulse width distortion.

Use Value: Prevents ground loop currents and common-mode noise from disrupting serial communication over long cable runs in factory automation networks.

Motor Drive Gate Driver Interface

Isolated CAN Node Power Domain Separation

Use Scenario: Isolating PWM signals from a 3.3 V DSP to six-pack IGBT gate drivers in a variable-frequency drive (VFD), where high dv/dt noise exceeds 15 kV/µs.

IC Role / Device Role / Timing Role: ADUM7442CRQZ carries three complementary PWM pairs (A/B, C/D, VOA/VOB) across the barrier - maintaining precise dead-time control via matched propagation delays.

Use Value: Ensures reliable switching of high-power inverters under extreme EMI conditions, eliminating false turn-on due to common-mode transients.

Use Scenario: Separating the 3.3 V CAN controller (e.g., MCP2515) from a 5 V CAN transceiver (e.g., SN65HVD230) in an automotive diagnostic tool with external 12 V supply.

IC Role / Device Role / Timing Role: ADUM7442CRQZ isolates CAN TXD/RXD and transceiver control lines - enabling voltage translation while meeting ISO 11898-2 common-mode range requirements.

Use Value: Provides robust fault containment between vehicle battery domain and low-voltage microcontroller domain, preventing latch-up during load dump events.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SI8642ED-B-IS	Capacitive isolation; 2.5 kV_RMS rating; higher supply current (20 mA @ 25 Mbps, 3.3 V)	Preferred where higher isolation voltage or AEC-Q100 qualification is required	Choose SI8642ED-B-IS only if 2.5 kV_RMS certification or automotive temperature range (−40°C to +125°C) is mandatory.
ISO6742FDWR	Capacitive isolation; 5 kV_RMS; integrated LDO (3.3 V out); no level translation capability	Suitable for single-supply isolated systems needing regulated output rail	Select ISO6742FDWR when board space allows larger SOIC-16 and a clean 3.3 V auxiliary rail is needed for downstream circuitry.

Compared with SI8642ED-B-IS and ISO6742FDWR, ADUM7442CRQZ offers lower dynamic power consumption, native 3 V/5 V level translation without external components, and QSOP-16 footprint - making it optimal for cost- and space-sensitive industrial SPI isolation where 1 kV_RMS meets safety requirements.

Availability

ADUM7442CRQZ is available at Aetrix Electronics and suitable for industrial PLCs, motor drives, isolated data converters, and RS-485 fieldbus nodes requiring stable component supply across multi-year production cycles.

Supply support for ADUM7442CRQZ 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.

The ADuM744x family was designed specifically for cost-effective, space-efficient functional isolation in industrial automation and instrumentation - prioritizing low power, high CMTI, and flexible supply operation over ultra-high voltage ratings.

FAQ

What is the channel configuration of ADUM7442CRQZ?

ADUM7442CRQZ has two input channels (VIA, VIB) and two output channels (VOC, VOD) on Side 1, plus two additional input channels (VID, VIC) and two output channels (VOB, VOA) on Side 2 - totaling four unidirectional channels with fixed direction per pin as defined in Table 22 of the Rev. E datasheet. This differs from ADUM7440 (all inputs on Side 1, all outputs on Side 2) and ADUM7441 (mixed direction per side).

Does ADUM7442CRQZ support mixed-voltage operation?

Yes, ADUM7442CRQZ supports independent 3.0–5.5 V supplies on VDD1 and VDD2 sides, enabling true level translation - for example, 3.3 V logic on Side 1 can drive 5 V outputs on Side 2, or vice versa. Electrical characteristics for mixed 3.3 V/5 V and 5 V/3.3 V operation are fully specified in Tables 7–12 of the datasheet.

What is the maximum data rate supported by ADUM7442CRQZ?

ADUM7442CRQZ supports up to 25 Mbps NRZ data rate, verified across all operating conditions (−40°C to +105°C, 3.0–5.5 V supplies). At this rate, typical pulse width distortion remains below 5 ns (C grade), and propagation delay skew stays under 10 ns for codirectional channels - critical for high-speed SPI and digital encoder interfaces.

How does ADUM7442CRQZ behave during power loss on one side?

When VDD1 is lost, all outputs default to high logic state; when VDD2 is lost, all outputs enter high-impedance state. This behavior is documented in Table 19 (Truth Table) and ensures predictable system-level fail-safe operation - for instance, holding an isolated enable line active during input-side brownout in a motor control application using ADUM7442CRQZ.

Is ADUM7442CRQZ RoHS compliant and halogen-free?

Yes, ADUM7442CRQZ is RoHS compliant and halogen-free per Analog Devices' material declarations. The QSOP-16 package uses lead-free matte tin finish, and the device meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 - requiring bake prior to reflow if exposed to ambient >30°C/60% RH for >168 hours.

ADUM7442CRQZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: iCoupler®

Package/Case:: 16-SSOP (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Technology:: Magnetic Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 4

Inputs - Side 1/Side 2:: 2/2

Channel Type:: Unidirectional

Voltage - Isolation:: 1000Vrms

Common Mode Transient Immunity (Min):: 15kV/µs

Data Rate:: 25Mbps

Propagation Delay tpLH / tpHL (Max):: 50ns, 50ns

Pulse Width Distortion (Max):: 5ns

Rise / Fall Time (Typ):: 2ns, 2ns

Voltage - Supply:: 3V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 105°C

Mounting Type:: Surface Mount

Supplier Device Package:: 16-QSOP

ADUM7442CRQZ FAQ

1.How can I place an order for ADUM7442CRQZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADUM7442CRQZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADUM7442CRQZ reliable?

The price and inventory of ADUM7442CRQZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7442CRQZ is usually 5 days.

3.What payment methods are accepted for ADUM7442CRQZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7442CRQZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADUM7442CRQZ?

ADUM7442CRQZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADUM7442CRQZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADUM7442CRQZ?

For technical support, including ADUM7442CRQZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7442CRQZ requirements.

6.How does Aetrix verify that ADUM7442CRQZ is sourced from the original manufacturer or authorized distributors?

All ADUM7442CRQZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADUM7442CRQZ meets industry standards.

7.What is the process for return or replacement of ADUM7442CRQZ?

All ADUM7442CRQZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7442CRQZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADUM7442CRQZ part is unused and in its original packaging.

Return procedure for ADUM7442CRQZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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