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Analog Devices Inc. ADUM7643CRQZ-RL7
- Part No.:
- ADUM7643CRQZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADUM7643CRQZ-RL7.pdf
- Description:
- DGTL ISO 1000VRMS 6CH GP 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,449
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Product details
Overview
ADUM7643CRQZ-RL7 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) with 3.3 V or 5 V operation on either side. It provides level translation between 3 V and 5 V domains and delivers high common-mode transient immunity (>15 kV/µs), making it suitable for isolated SPI interfaces in industrial PLC I/O modules.
For engineers reviewing the ADUM7643CRQZ-RL7 datasheet, ADUM7643CRQZ-RL7 pinout, ADUM7643CRQZ-RL7 application, or ADUM7643CRQZ-RL7 equivalent, key selection criteria include channel direction configuration (4 inputs / 2 outputs), low power consumption (24 mA total at 3.3 V/1 Mbps), pulse width distortion <6 ns, and UL 1577-certified 1000 VRMS isolation for functional safety in motor drive gate driver feedback loops.
Technical Context
The ADUM7643CRQZ-RL7 implements iCoupler® transformer-based isolation with integrated DC-corrected data recovery and per-channel glitch filtering. Its architecture supports mixed-voltage operation (e.g., 3.3 V side 1 / 5 V side 2) while maintaining propagation delay skew ≤15 ns (codirectional) and ≤18 ns (opposing directional) across all six channels.
It features default-high output logic state during input-side power loss and refreshes DC levels at ≥550 kHz to ensure robust static signal integrity. The device operates across −40°C to +105°C with supply voltage flexibility (3.0 V–5.5 V per side) and meets IEC 62368-1 clearance/creepage requirements (4 mm).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 1000 VRMS for 1 minute (UL 1577 certified); enables functional isolation in non-safety-critical industrial control systems |
| Data Rate | Up to 25 Mbps NRZ; supports high-speed isolated SPI clock and data lines without timing bottlenecks |
| Channel Configuration | 4 input channels (A–D), 2 output channels (E–F); matches asymmetric interface needs like isolated ADC readback + DAC write |
| Supply Voltage Range | 3.0 V–5.5 V per side; allows direct interfacing with 3.3 V microcontrollers and 5 V analog front-ends |
| Common-Mode Immunity | >15 kV/µs; prevents corruption in noisy motor drive or power supply environments with fast switching transients |
| Propagation Delay Skew | ≤15 ns codirectional, ≤18 ns opposing; ensures tight timing alignment for multi-bit parallel isolated signals |
| Power Consumption | 24 mA total at 3.3 V/1 Mbps (side 1), 20 mA at side 2; reduces thermal load in space-constrained enclosures |
Pinout & Package
ADUM7643CRQZ-RL7 uses a 20-lead QSOP package (7.2 mm × 9.5 mm, 0.65 mm pitch) with dual-side ground and supply pins for noise suppression. Side 1 (pins 1–10) hosts four inputs and two supplies; Side 2 (pins 11–20) hosts two outputs and two supplies. Ground pins (2,10,11,19) and supply pins (1/7,14/20) must be decoupled locally with 0.01–0.1 µF capacitors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | VDD1A / VDD1B | Side 1 supply rails - externally shorted; powers input channels A–D and internal logic |
| 2, 10 | GND1 | Side 1 ground reference - internally connected; requires low-inductance PCB plane connection |
| 3–6, 8–9 | VIA–VID, VIE, VIF | Four input (A–D) and two input (E,F) pins - E/F are inputs per ADUM7643 truth table and pin config |
| 11, 19 | GND2 | Side 2 ground reference - internally connected; isolated return path for output side |
| 12–13, 15–18 | VOF, VOE, VOD–VOA | Two output (F,E) and four output (D–A) pins - A–D are outputs per ADUM7643 pin function table |
| 14, 20 | VDD2B / VDD2A | Side 2 supply rails - externally shorted; powers output channels A–D and E–F |
Key Features
| Feature | Design Value |
|---|---|
| Low-power isolation | Consumes only 18–21 mA per side at 3.3 V/1 Mbps - cuts heat generation vs. optocoupler alternatives |
| Asymmetric channel mapping | 4-input / 2-output configuration optimizes PCB routing for isolated serial peripheral interfaces |
| Glitch-filtered outputs | Per-channel noise suppression prevents false triggering in electrically harsh factory automation settings |
| Fail-safe default state | Outputs go high when input side loses power - maintains known logic state in fault conditions |
| Mixed-voltage interoperability | Supports 3.3 V ↔ 5 V level translation without external level shifters in mixed-supply systems |
Applications
| Industrial PLC Digital I/O Isolation | SPI-Isolated Data Converter Interface |
|---|---|
|
Use Scenario: Isolating 24 V digital input/output modules from 3.3 V controller logic in programmable logic controllers. IC Role / Device Role / Timing Role: ADUM7643CRQZ-RL7 provides galvanic separation for four sensor inputs and two actuator command outputs with matched propagation delays. Use Value: Enables compact, low-power I/O modules meeting IEC 61000-4-5 surge immunity requirements without discrete optocouplers. |
Use Scenario: Isolating SPI bus between an MCU and isolated ADC/DAC in precision measurement equipment. IC Role / Device Role / Timing Role: ADUM7643CRQZ-RL7 carries SCLK, MOSI, MISO, and CS signals across isolation barrier with <6 ns pulse width distortion. Use Value: Preserves SPI timing margins at 20+ MHz clock rates while blocking ground loops that degrade ENOB. |
| Motor Drive Gate Driver Feedback | Isolated RS-485 Transceiver Control |
|
Use Scenario: Transmitting fault status and current sense data from high-side IGBT gate drivers back to low-voltage control logic. IC Role / Device Role / Timing Role: ADUM7643CRQZ-RL7 isolates two analog-to-digital converter outputs and four digital status bits with >15 kV/µs CMTI. Use Value: Prevents false shutdowns caused by dv/dt-induced coupling in 600 V+ inverter stages. |
Use Scenario: Isolating DE/RE control lines and RX/TX data paths of RS-485 transceivers in distributed fieldbus nodes. IC Role / Device Role / Timing Role: ADUM7643CRQZ-RL7 handles bidirectional data (2 channels) and unidirectional control (4 channels) across the barrier. Use Value: Eliminates ground potential differences that cause bus contention or data corruption in long-haul networks. |
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 |
|---|---|---|---|
| SI8663BB-B-IS | 6-channel, 5 kVRMS isolation, 150 Mbps max, SOIC-20 package; higher isolation rating but higher quiescent current (30 mA @ 3.3 V) | Better suited for reinforced insulation requirements (e.g., medical, EV charging); less optimal for cost-sensitive industrial controls | Choose SI8663BB-B-IS when regulatory compliance demands >1 kVRMS working voltage or higher CMTI (>35 kV/µs) |
| ISO6763RQWR | 6-channel, 5000 VRMS isolation, 50 Mbps max, SOIC-20; TI's capacitive isolation with lower propagation delay skew (≤1 ns) | Targeted at high-reliability automotive and grid infrastructure where lifetime validation per AEC-Q100 or IEC 61850 is required | Choose ISO6763RQWR when system-level safety certification (e.g., IEC 61508 SIL-2) drives component selection |
Compared with SI8663BB-B-IS and ISO6763RQWR, ADUM7643CRQZ-RL7 offers the lowest power profile and smallest footprint for functional isolation in cost-optimized industrial designs, trading higher isolation voltage for reduced BOM count and thermal overhead.
Availability
ADUM7643CRQZ-RL7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, isolated SPI data converters, motor drive feedback systems, and RS-485 fieldbus nodes requiring stable component supply and long-term manufacturability.
Supply support for ADUM7643CRQZ-RL7 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 industrial, automotive, communications, and healthcare markets since 1965.
The ADuM764x family was designed specifically for cost-sensitive, space-constrained industrial isolation applications where 1 kVRMS functional isolation suffices - delivering iCoupler® reliability without over-engineering for safety-critical use cases.
FAQ
What is the channel direction configuration of ADUM7643CRQZ-RL7?
ADUM7643CRQZ-RL7 has four input channels (A–D) and two output channels (E–F) on opposite sides of the isolation barrier. This 4:2 asymmetry is confirmed in Figure 9 and Table 23 of the datasheet, enabling efficient routing for interfaces like isolated SPI with separate command and status paths.
Does ADUM7643CRQZ-RL7 support mixed 3.3 V and 5 V operation?
Yes, ADUM7643CRQZ-RL7 supports mixed-voltage operation: side 1 can run at 3.3 V while side 2 runs at 5 V (or vice versa), as verified in Tables 7 and 10 of the datasheet. This eliminates external level shifters when interfacing 3.3 V microcontrollers with 5 V analog circuitry.
What is the maximum propagation delay skew between channels in ADUM7643CRQZ-RL7?
For ADUM7643CRQZ-RL7, the maximum codirectional propagation delay skew is 15 ns and opposing directional skew is 18 ns, per Table 7 (mixed 5 V/3.3 V operation) and Table 10 (mixed 3.3 V/5 V operation) - critical for time-aligned multi-bit signals like isolated parallel ADC outputs.
How does ADUM7643CRQZ-RL7 behave when one side loses power?
When the input side (VDD1) of ADUM7643CRQZ-RL7 is unpowered, all outputs default to high state per Table 19 (Truth Table). Outputs return to correct logic within 1.6 µs after VDD1 restoration - ensuring predictable fail-safe behavior in brownout conditions.
Is ADUM7643CRQZ-RL7 RoHS compliant and halogen-free?
Yes, ADUM7643CRQZ-RL7 is RoHS compliant and halogen-free, as stated in Analog Devices' official product page and packaging documentation. The "-RL7" suffix denotes tape-and-reel packaging meeting JEDEC J-STD-020 moisture sensitivity level 3 standards.
ADUM7643CRQZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 3/3
- 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
ADUM7643CRQZ-RL7 FAQ
1.How can I place an order for ADUM7643CRQZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM7643CRQZ-RL7 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 ADUM7643CRQZ-RL7 reliable?
The price and inventory of ADUM7643CRQZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM7643CRQZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM7643CRQZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM7643CRQZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM7643CRQZ-RL7?
ADUM7643CRQZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM7643CRQZ-RL7 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 ADUM7643CRQZ-RL7?
For technical support, including ADUM7643CRQZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM7643CRQZ-RL7 requirements.
6.How does Aetrix verify that ADUM7643CRQZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM7643CRQZ-RL7 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 ADUM7643CRQZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM7643CRQZ-RL7?
All ADUM7643CRQZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM7643CRQZ-RL7, 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 ADUM7643CRQZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM7643CRQZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM7643CRQZ-RL7 Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
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ISO7741FDWR
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