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Analog Devices Inc. ADUM1280WCRZ
- Part No.:
- ADUM1280WCRZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1280WCRZ.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
ADUM1280WCRZ from Analog Devices is a 3 kVRMS dual-channel digital isolator with iCoupler® transformer-based isolation, designed for bidirectional signal transmission across galvanic barriers in industrial and automotive systems. It delivers 100 Mbps data rate, 23 ns typical propagation delay, 3.3 V to 5 V level translation, and default-high output logic state. It is used in motor drive control interfaces where high common-mode transient immunity (>25 kV/µs) and AEC-Q100 qualification are required.
For engineers reviewing the ADUM1280WCRZ datasheet, ADUM1280WCRZ pinout, ADUM1280WCRZ application, or ADUM1280WCRZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative parts with documented functional and application-level differences.
Technical Context
The ADUM1280WCRZ implements two independent monolithic air-core transformer channels with patented refresh circuitry ensuring DC-correct output states during input inactivity. Its C-grade timing performance includes ≤23 ns propagation delay, ≤2 ns pulse width distortion, and ≤5 ns codirectional channel matching - all specified over −40°C to +125°C.
It supports mixed-supply operation (e.g., 5 V on side 1, 3.3 V on side 2), enabling voltage translation across the isolation barrier. Safety compliance includes UL 1577 (3000 VRMS/1 min), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (565 VPEAK), and AEC-Q100 Grade 1 qualification for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - supports high-speed serial interfaces like SPI clock lines or isolated UART at full throughput without oversampling. |
| Propagation Delay | 23 ns typical - enables tight timing budgets in closed-loop motor control feedback paths with minimal latency impact. |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity in noisy environments such as IGBT gate driver circuits with fast switching transients. |
| Isolation Rating | 3000 VRMS for 1 minute - meets reinforced insulation requirements for industrial safety standards including IEC 62368-1 and IEC 61010-1. |
| Supply Range | 3.135 V to 5.5 V per side - allows interoperability between legacy 5 V logic and modern 3.3 V microcontrollers without external level shifters. |
| Default Output State | High - ensures fail-safe logic-high assertion on power-up or input-side brownout, critical for enable/disable control signals. |
| Operating Temperature | −40°C to +125°C - supports under-hood automotive applications and industrial drives operating in harsh thermal environments. |
Pinout & Package
Narrow-body, RoHS-compliant 8-lead SOIC package (SOIC_N) with creepage and clearance ≥4.0 mm, rated for reinforced insulation per VDE 0884-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side supply | Power source for side 1 logic and transformer primary; must be stable within 3.135–5.5 V to avoid UVLO activation. |
| 2 - VIA | Input A | Primary-side digital input channel A; accepts CMOS levels referenced to VDD1/GND1. |
| 3 - VIB | Input B | Primary-side digital input channel B; electrically isolated from VIA but shares same supply domain. |
| 4 - GND1 | Input-side ground | Reference return path for VDD1, VIA, and VIB; must be separated from GND2 by ≥4.0 mm PCB clearance. |
| 5 - GND2 | Output-side ground | Reference return path for VDD2, VOA, and VOB; forms secondary-side ground plane isolated from GND1. |
| 6 - VOB | Output B | Secondary-side digital output channel B; logic state mirrors VIB with default-high behavior on power loss. |
| 7 - VOA | Output A | Secondary-side digital output channel A; logic state mirrors VIA with default-high behavior on power loss. |
| 8 - VDD2 | Output-side supply | Power source for side 2 logic and transformer secondary; enables level translation when VDD2 ≠ VDD1. |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuitry | Maintains DC-correct output state indefinitely without input transitions - eliminates need for external watchdog or refresh clocks. |
| High CMTI & low PWD | >25 kV/µs common-mode immunity and ≤2 ns pulse width distortion preserve signal fidelity in high-noise motor control and power conversion. |
| Independent dual channels | Two fully isolated signal paths allow simultaneous bidirectional communication (e.g., SPI MOSI/MISO) without crosstalk or skew coupling. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications up to +125°C ambient - supports battery management systems and EV traction inverters. |
| Reinforced insulation certification | DIN EN IEC 60747-17 (VDE 0884-17) approval with VIORM = 565 VPEAK - satisfies safety requirements for functional isolation in medical and industrial equipment. |
Applications
| Motor Drive Control Interface | Data Converter Isolation |
|---|---|
|
Use Scenario: Isolating PWM gate drive signals and current-sense feedback from an MCU to an IGBT/SiC half-bridge inverter stage. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting complementary PWM signals while preserving edge alignment and minimizing propagation skew. Use Value: Enables safe, high-fidelity gate control with 23 ns delay and <5 ns channel matching - critical for preventing shoot-through in high-frequency switching. |
Use Scenario: Isolating serial interface (SPI) between a precision ADC (e.g., AD7606) and host processor in a high-voltage power monitoring system. IC Role / Device Role / Timing Role: Bidirectional digital isolator handling SCLK, SDI, SDO, and CS signals across isolation barrier with level translation. Use Value: Maintains 100 Mbps data throughput and <2 ns pulse width distortion - preserves timing accuracy for synchronized multi-channel sampling. |
| Industrial Fieldbus Node | Automotive Battery Monitor |
|
Use Scenario: Isolating RS-485 transceiver control lines and status signals in a PROFIBUS DP slave node operating in factory automation. IC Role / Device Role / Timing Role: Signal isolator separating controller logic from bus-side PHY, supporting hot-plug and fault containment. Use Value: Provides 3000 VRMS isolation and >25 kV/µs CMTI - prevents ground loop noise and protects against bus faults in noisy plant environments. |
Use Scenario: Isolating cell voltage measurement data and balancing command signals between battery management IC (e.g., LTC6813) and vehicle ECU. IC Role / Device Role / Timing Role: AEC-Q100 qualified dual isolator enabling safe communication across high-potential battery stack boundaries. Use Value: Supports −40°C to +125°C operation and reinforced insulation (565 VPEAK) - meets ASIL-B functional safety requirements for EV battery packs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8620ED-B-IS | Capacitive isolation; 150 Mbps max data rate; 10 kV/µs CMTI; 2.5–5.5 V supply; default-low outputs. | Higher speed but lower noise immunity; lacks AEC-Q100 qualification; not approved to VDE 0884-17. | Preferred for cost-sensitive industrial designs requiring >100 Mbps, where CMTI >25 kV/µs is not mandatory. |
| ISO7721DWR | Capacitive isolation; 100 Mbps; 100 kV/µs CMTI; 2.25–5.5 V supply; default-high outputs; UL/VDE certified. | Superior CMTI but no AEC-Q100 rating; different pinout (SOIC-16); higher quiescent current at 100 Mbps. | Suitable for industrial PLC I/O modules needing extreme noise immunity, but requires PCB redesign due to 16-pin SOIC footprint. |
Compared with SI8620ED-B-IS and ISO7721DWR, ADUM1280WCRZ uniquely combines AEC-Q100 qualification, VDE 0884-17 reinforced insulation, and default-high output in an industry-standard 8-pin SOIC package - making it optimal for automotive and safety-critical industrial isolation where regulatory compliance and fail-safe behavior are non-negotiable.
Availability
ADUM1280WCRZ is available at Aetrix Electronics and suitable for motor drive control, battery management systems, and industrial fieldbus nodes requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADUM1280WCRZ 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 ADuM1280WCRZ belongs to the iCoupler® digital isolator product line, engineered specifically for high-reliability galvanic isolation in safety-critical systems demanding low latency, high CMTI, and regulatory certification.
FAQ
What is the default output state of ADUM1280WCRZ?
The ADUM1280WCRZ has a default-high output state: when power is applied only to the output side (VDD2), both VOA and VOB assert logic high until valid input signals are received on VIA/VIB. This behavior is confirmed in Tables 22 and 23 of the Rev. E datasheet and ensures fail-safe operation in power sequencing scenarios. The ADUM1280WCRZ maintains this default state even during input-side brownout or unpowered conditions.
Does ADUM1280WCRZ support level translation between 3.3 V and 5 V domains?
Yes, ADUM1280WCRZ supports true bidirectional level translation: VDD1 and VDD2 can operate independently at 3.135 V to 5.5 V, enabling configurations such as 5 V MCU ↔ 3.3 V sensor or 3.3 V FPGA ↔ 5 V actuator. Electrical Characteristics tables for mixed 5 V/3.3 V and 3.3 V/5 V operation (Tables 7 and 10) confirm propagation delay, jitter, and supply current remain within spec across these combinations. This capability is intrinsic to the ADUM1280WCRZ architecture and requires no external components.
What safety certifications does ADUM1280WCRZ hold?
ADUM1280WCRZ is certified to UL 1577 (3000 VRMS/1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 565 VPEAK), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1. It also carries AEC-Q100 Grade 1 qualification for automotive use. These approvals are explicitly listed in Table 14 and Section "Regulatory Information" of the Rev. E datasheet. The "W" in ADUM1280WCRZ denotes VDE 0884-17 compliance, marked by an asterisk on the package.
How does the refresh feature of ADUM1280WCRZ ensure DC correctness?
The ADUM1280WCRZ incorporates a patented internal refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier - even when no input transitions occur. This guarantees DC-correct output levels indefinitely, eliminating output drift or metastability seen in optocouplers or basic capacitive isolators. The refresh period is fixed at 1.6 µs (Table 4, Table 6, Table 9, Table 12), and the feature operates autonomously without external clock or configuration. This behavior is fundamental to the ADUM1280WCRZ's reliability in static-control applications.
What is the maximum continuous working voltage for ADUM1280WCRZ?
The maximum continuous working voltage for ADUM1280WCRZ is 565 VPEAK (reinforced insulation, bipolar waveform), as defined in Table 19 and Section "Insulation and Safety-Related Specifications". This value corresponds to the VIORM rating per DIN EN IEC 60747-17 (VDE 0884-17) and is distinct from the 3000 VRMS 1-minute dielectric withstand rating. The 565 VPEAK limit applies to steady-state AC or DC voltage continuously imposed across the isolation barrier in end-equipment designs compliant with IEC 62368-1 and IEC 61010-1.
ADUM1280WCRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 24ns, 24ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM1280WCRZ FAQ
1.How can I place an order for ADUM1280WCRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1280WCRZ 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 ADUM1280WCRZ reliable?
The price and inventory of ADUM1280WCRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1280WCRZ is usually 5 days.
3.What payment methods are accepted for ADUM1280WCRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1280WCRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1280WCRZ?
ADUM1280WCRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1280WCRZ 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 ADUM1280WCRZ?
For technical support, including ADUM1280WCRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1280WCRZ requirements.
6.How does Aetrix verify that ADUM1280WCRZ is sourced from the original manufacturer or authorized distributors?
All ADUM1280WCRZ 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 ADUM1280WCRZ meets industry standards.
7.What is the process for return or replacement of ADUM1280WCRZ?
All ADUM1280WCRZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1280WCRZ, 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 ADUM1280WCRZ part is unused and in its original packaging.
Return procedure for ADUM1280WCRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1280WCRZ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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