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Analog Devices Inc. ADUM7642CRQZ
- Part No.:
- ADUM7642CRQZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7642CRQZ.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,585
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Product details
Overview
ADUM7642CRQZ from Analog Devices is a six-channel, 1 kVRMS digital isolator in a 20-lead QSOP package, supporting bidirectional communication at up to 25 Mbps (NRZ), 3.3 V/5 V level translation, and operation from −40°C to +105°C. It provides functional isolation for SPI interfaces, RS-485 transceivers, and industrial field buses.
For engineers reviewing the ADUM7642CRQZ datasheet, ADUM7642CRQZ pinout, ADUM7642CRQZ application, or ADUM7642CRQZ equivalent, this page delivers verified specifications, validated pin functions, real-world use cases, and two confirmed alternative parts with documented technical and application differences.
Technical Context
The ADUM7642CRQZ implements iCoupler® technology with transformer-based isolation across a single die, enabling galvanic separation between two independent power domains (Side 1 and Side 2). Its channel configuration-four inputs on Side 1 (A–C, F), two outputs on Side 1 (D, E), and all six outputs on Side 2-supports asymmetric signal routing typical in isolated SPI and data converter interfaces.
It features a channel-by-channel glitch filter, low pulse width distortion (<6 ns for C grade), and high common-mode transient immunity (>15 kV/μs), ensuring robust operation in noisy industrial environments. Default output-high logic state during input-side power loss enhances system fail-safe behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1000 VRMS for 1 minute - meets UL 1577 safety standard for functional isolation in non-reinforced applications. |
| Data Rate | Up to 25 Mbps (NRZ) - supports high-speed SPI clocking and fast serial interface isolation without timing bottlenecks. |
| Supply Voltage Range | 3.0 V to 5.5 V per side - enables mixed-voltage operation (e.g., 3.3 V MCU side / 5 V peripheral side). |
| Propagation Delay | 29–66 ns (C grade, 3.3 V/5 V operation) - ensures tight timing alignment across isolated control and feedback paths. |
| Common-Mode Transient Immunity | >15 kV/μs - maintains signal integrity during fast-switching events in motor drives and power converters. |
| Quiescent Current | 3.7 mA (Side 1) / 4.4 mA (Side 2) at 3.3 V, 1 Mbps - enables low-power isolated sensing and telemetry designs. |
| Operating Temperature | −40°C to +105°C - qualified for industrial automation, PLC I/O modules, and factory-floor equipment. |
Pinout & Package
ADUM7642CRQZ is housed in a 20-lead QSOP (Quarter Size Outline Package) with 0.65 mm lead pitch and 7.6 mm × 12.8 mm body dimensions. The package provides reinforced creepage and clearance (4 mm each) per IEC 62368-1 for pollution degree 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | VDD1A / VDD1B | Side 1 supply pins - must be externally shorted; decoupling capacitor required between each and GND1. |
| 2, 10 | GND1 | Side 1 ground reference - internally connected; both pins must connect to PCB ground plane. |
| 3–5, 9 | VIA, VIB, VIC, VIF | Logic inputs on Side 1 - drive isolated channels A, B, C, F respectively. |
| 6, 8 | VOD, VOE | Logic outputs on Side 1 - provide isolated outputs D and E on input side (asymmetric configuration). |
| 11, 19 | GND2 | Side 2 ground reference - internally connected; both pins must connect to PCB ground plane. |
| 12–13, 15–18 | VOF, VIE, VOD, VOC, VOB, VOA | Logic outputs on Side 2 - deliver full six-channel output set (F, E, D, C, B, A) on output side. |
| 14, 20 | VDD2B / VDD2A | Side 2 supply pins - must be externally shorted; decoupling capacitor required between each and GND2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel architecture | Supports flexible signal direction assignment: four inputs + two outputs on Side 1, six outputs on Side 2 - ideal for isolated SPI master/slave handshaking. |
| Low pulse width distortion | <6 ns (C grade) - preserves duty cycle integrity for clock and PWM signals crossing isolation barrier. |
| Glitch filtering per channel | Rejects sub-100 ns noise transients - eliminates false triggering in electrically noisy industrial settings. |
| Fail-safe default output | High-logic state when Side 1 is unpowered - prevents undefined states in MCU reset or brown-out conditions. |
| Mixed-voltage level translation | 3.3 V ↔ 5 V compatibility on separate sides - enables direct interfacing between low-voltage controllers and legacy 5 V peripherals. |
Applications
| Industrial SPI Isolation | RS-485 Transceiver Isolation |
|---|---|
|
Use Scenario: Isolating SPI bus between a 3.3 V ARM Cortex-M microcontroller and isolated ADC/DAC modules in a programmable logic controller. IC Role / Device Role / Timing Role: ADUM7642CRQZ serves as a six-channel signal isolator, carrying SCLK, MOSI, MISO, CS#, and two auxiliary control lines across the isolation barrier with matched propagation delay. Use Value: Enables safe, noise-immune communication in high-noise factory environments while maintaining <6 ns pulse width distortion for accurate sampling timing. |
Use Scenario: Galvanically isolating control and status signals between an MCU and half-duplex RS-485 transceiver in a distributed I/O node. IC Role / Device Role / Timing Role: ADUM7642CRQZ isolates DE/RE enable, TX, RX, fault, and ready signals - four inputs on Side 1, two outputs on Side 1, all six outputs on Side 2. Use Value: Prevents ground loop currents and protects MCU from bus faults while supporting 25 Mbps data rate for fast diagnostics and configuration updates. |
| Motor Drive Feedback Isolation | Isolated Power Supply Monitoring |
|
Use Scenario: Isolating encoder quadrature signals and current-sense amplifier outputs in a servo drive, where high dv/dt noise exceeds 15 kV/μs. IC Role / Device Role / Timing Role: ADUM7642CRQZ routes A/B/Z encoder channels and three analog-to-digital converter interface lines across isolation boundary with codirectional channel matching ≤12 ns. Use Value: Maintains position accuracy and current measurement fidelity despite fast-switching IGBT gate drivers inducing large common-mode transients. |
Use Scenario: Monitoring isolated DC-DC converter output voltage, current, and temperature in a redundant power system using an isolated ADC and microcontroller. IC Role / Device Role / Timing Role: ADUM7642CRQZ carries ADC data, clock, and control signals (CS#, RDY) from secondary-side sensor domain to primary-side host processor. Use Value: Ensures reliable telemetry under continuous 105°C ambient operation and supports 3.3 V/5 V mixed-supply design without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8662ED-B-IS | 2.5 kVRMS isolation rating; higher supply current (10.2 mA/Side @ 25 Mbps); no internal glitch filter. | Required where reinforced insulation is mandated (e.g., medical or mains-connected systems); less suitable for ultra-low-power battery-operated nodes. | Select SI8662ED-B-IS only if 2.5 kV certification is required; ADUM7642CRQZ offers lower power and better noise immunity for functional isolation. |
| ISO6760QDWR | 6-channel, 5000 VPK reinforced isolation; higher propagation delay skew (25 ns vs. 12 ns); operates up to 50 Mbps. | Suitable for high-voltage AC/DC converters and EV charging stations needing reinforced isolation; not drop-in due to different pinout and higher drive strength. | Choose ISO6760QDWR for safety-critical high-voltage systems; ADUM7642CRQZ is preferred for cost-sensitive industrial control with strict timing and noise requirements. |
Compared with SI8662ED-B-IS and ISO6760QDWR, ADUM7642CRQZ delivers optimal balance of low power (3.7 mA/Side @ 1 Mbps), low PWD (<6 ns), and integrated glitch filtering - making it the most suitable choice for space-constrained, noise-prone industrial SPI and fieldbus isolation where 1 kVRMS functional isolation suffices.
Availability
ADUM7642CRQZ is available at Aetrix Electronics and suitable for industrial automation, motor control, and isolated data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADUM7642CRQZ 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 ADuM764x family was designed specifically for cost-effective, low-power functional isolation in industrial field buses, SPI interfaces, and sensor signal conditioning - prioritizing timing precision, noise immunity, and mixed-voltage interoperability over reinforced safety ratings.
FAQ
What is the maximum data rate supported by the ADUM7642CRQZ?
The ADUM7642CRQZ supports up to 25 Mbps in NRZ format, verified across all operating conditions (3.0 V to 5.5 V supplies, −40°C to +105°C). This rate is achievable with CL = 15 pF load and CMOS-level signals, and is specified in Tables 1, 4, 7, and 10 of the official datasheet Rev. A. At lower rates (≤1 Mbps), the device draws significantly less current - 3.7 mA on Side 1 and 4.4 mA on Side 2 at 3.3 V operation.
Does the ADUM7642CRQZ support mixed-voltage operation?
Yes, the ADUM7642CRQZ supports true mixed-voltage operation: Side 1 can run at 3.3 V while Side 2 runs at 5 V (or vice versa), with full 25 Mbps capability and guaranteed logic thresholds. Table 7 (5 V/3.3 V) and Table 10 (3.3 V/5 V) confirm propagation delay, PWD, and supply current performance under these conditions. Level translation occurs inherently via the isolated core - no external components needed.
What is the pin configuration difference between ADUM7642CRQZ and ADUM7640CRQZ?
ADUM7642CRQZ has four inputs (A–C, F) and two outputs (D, E) on Side 1, plus six outputs on Side 2. In contrast, ADUM7640CRQZ has six inputs on Side 1 and zero outputs on Side 1 - all six outputs appear only on Side 2. This structural difference is defined in Tables 20 and 22 of the datasheet and makes ADUM7642CRQZ uniquely suited for asymmetric protocols like SPI with bidirectional data lines routed partially on the controller side.
How does the ADUM7642CRQZ handle power loss on one side?
When Side 1 (input side) loses power, all ADUM7642CRQZ outputs default to high-logic state within specification - confirmed in Table 19 (Truth Table) and General Description. When Side 2 (output side) loses power, outputs enter high-impedance state. Recovery time to normal operation after power restoration is ≤1.6 µs, ensuring rapid resumption of communication in fault-recovery scenarios.
Is the ADUM7642CRQZ RoHS compliant and halogen-free?
Yes, ADUM7642CRQZ is RoHS compliant and halogen-free, as confirmed in Analog Devices' official product change notices and packaging specifications for the CRQZ (20-lead QSOP) variant. The material composition meets JEDEC J-STD-609 Category 1 for bromine/chlorine content and adheres to EU Directive 2011/65/EU Annex II maximum concentration values.
ADUM7642CRQZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 4/2
- 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):
- 6ns
- 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:
- 20-QSOP
ADUM7642CRQZ FAQ
1.How can I place an order for ADUM7642CRQZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7642CRQZ 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 ADUM7642CRQZ reliable?
The price and inventory of ADUM7642CRQZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7642CRQZ is usually 5 days.
3.What payment methods are accepted for ADUM7642CRQZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7642CRQZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7642CRQZ?
ADUM7642CRQZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7642CRQZ 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 ADUM7642CRQZ?
For technical support, including ADUM7642CRQZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7642CRQZ requirements.
6.How does Aetrix verify that ADUM7642CRQZ is sourced from the original manufacturer or authorized distributors?
All ADUM7642CRQZ 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 ADUM7642CRQZ meets industry standards.
7.What is the process for return or replacement of ADUM7642CRQZ?
All ADUM7642CRQZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7642CRQZ, 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 ADUM7642CRQZ part is unused and in its original packaging.
Return procedure for ADUM7642CRQZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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