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Analog Devices Inc. ADUM1280WARZ-RL7
- Part No.:
- ADUM1280WARZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1280WARZ-RL7.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:800
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Product details
Overview
ADUM1280WARZ-RL7 from Analog Devices is a 3 kVRMS dual-channel digital isolator based on iCoupler® transformer technology, providing bidirectional signal isolation with default-high output logic state. It supports up to 100 Mbps NRZ data rate, exhibits 23 ns typical propagation delay, and operates across 3.135 V–5.5 V supply rails on both sides-enabling 3.3 V/5 V level translation. It is used in industrial field bus interfaces where high common-mode transient immunity (>25 kV/µs) and AEC-Q100 qualification are required.
For engineers reviewing the ADUM1280WARZ-RL7 datasheet, ADUM1280WARZ-RL7 pinout, ADUM1280WARZ-RL7 application, or ADUM1280WARZ-RL7 equivalent, this page delivers verified specifications including propagation delay skew (≤12 ns), refresh period (1.6 µs), VIORM (565 VPEAK), safety certifications (UL 1577, VDE 0884-17), and SOIC-8 narrow-body package compatibility for space-constrained PCB layouts.
Technical Context
The ADUM1280WARZ-RL7 implements two independent galvanic isolation channels using monolithic air-core transformers, eliminating LED aging and timing drift inherent in optocouplers. Its patented refresh circuit ensures DC-correct output states even during static input conditions or power-up sequencing.
It supports mixed-voltage operation (e.g., 5 V side 1 / 3.3 V side 2), with logic thresholds referenced to respective VDDx rails (VIH = 0.7×VDDx, VIL = 0.3×VDDx) and output drive capability of ±3.2 mA at VOH/VOL limits. Undervoltage lockout (2.75 V threshold) prevents erratic behavior during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - enables high-speed SPI, RS-485, or CAN FD interface isolation without oversampling. |
| Propagation Delay | 23 ns typical - supports tight-timing control loops in motor drives and real-time industrial PLCs. |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity in noisy environments like variable-frequency drives and battery monitoring systems. |
| Isolation Rating | 3000 VRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and IEC 62368-1. |
| VIORM | 565 VPEAK - defines maximum continuous working voltage under reinforced insulation per VDE 0884-17. |
| Operating Temperature | −40°C to +125°C - qualified for automotive and industrial ambient conditions without derating. |
| Supply Range | 3.135 V to 5.5 V per side - allows flexible system-level voltage translation (e.g., MCU-side 3.3 V ↔ sensor-side 5 V). |
Pinout & Package
Narrow-body, RoHS-compliant 8-lead SOIC package (SOIC_N-8), 5.3 mm × 4.4 mm footprint, 1.75 mm height, creepage/clearance ≥4.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side power supply | Supplies isolator side 1 (inputs VIA/VIB); must be decoupled locally; UVLO triggers below 2.65 V. |
| 2 - VIA | Input A | Logic input channel A on side 1; accepts CMOS levels referenced to VDD1. |
| 3 - VIB | Input B | Logic input channel B on side 1; independent of VIA; supports asynchronous dual-channel signaling. |
| 4 - GND1 | Input-side ground | Reference return for VDD1, VIA, and VIB; must be separated from GND2 by isolation barrier. |
| 5 - GND2 | Output-side ground | Reference return for VDD2, VOA, and VOB; forms isolated domain with side 2 components. |
| 6 - VOB | Output B | Default-high logic output channel B on side 2; driven by VIB input with 23 ns typical delay. |
| 7 - VOA | Output A | Default-high logic output channel A on side 2; driven by VIA input; matches VOB within ≤5 ns channel-to-channel skew. |
| 8 - VDD2 | Output-side power supply | Supplies isolator side 2 (outputs VOA/VOB); enables level-shifting when VDD2 ≠ VDD1. |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuit | Maintains DC-correct output state indefinitely during static input or power-loss events on either side. |
| Default-high output logic | Ensures fail-safe high-level outputs (VOA/VOB = H) when side 1 is unpowered - critical for safety interlocks. |
| High CMTI immunity | Withstands >25 kV/µs transients - eliminates false triggering in gate-drive or current-sense feedback paths. |
| Reinforced insulation certification | UL 1577 (3000 VRMS), VDE 0884-17 (565 VPEAK), IEC 62368-1 - enables single-component isolation in safety-critical systems. |
| AEC-Q100 Grade 1 qualification | Validated for automotive applications including battery management and motor control units operating up to 125°C. |
Applications
| Industrial Field Bus Isolation | Data Converter Interface Isolation |
|---|---|
Use Scenario: Isolating RS-485 transceivers in factory automation networks exposed to ground potential differences and EFT noise. IC Role / Device Role / Timing Role: Dual-channel digital isolator bridging controller UART and transceiver logic, preserving signal integrity at 25 Mbps. Use Value: Eliminates ground loops while maintaining <2 ns pulse width distortion and <5 ns channel matching for deterministic timing. |
Use Scenario: Isolating serial interface (SPI) between microcontroller and isolated ADC/DAC in precision measurement systems. IC Role / Device Role / Timing Role: Bidirectional isolator for SCLK/MOSI/MISO lines, supporting 100 Mbps clock rates with sub-25 ns propagation delay. Use Value: Enables simultaneous sampling across multiple isolated channels without timing skew-induced measurement error. |
| Hybrid Electric Vehicle Battery Monitor | Motor Drive Gate Driver Interface |
Use Scenario: Isolating cell voltage and temperature telemetry from high-voltage battery packs (up to 800 VDC) to low-voltage MCU domain. IC Role / Device Role / Timing Role: Safety-isolated communication link for BMS ICs, leveraging 3000 VRMS rating and AEC-Q100 qualification. Use Value: Meets reinforced insulation requirements per IEC 61851 and supports diagnostic polling at 1 Mbps with guaranteed DC correctness. |
Use Scenario: Isolating PWM signals from controller to half-bridge gate drivers in traction inverters subject to fast dv/dt switching noise. IC Role / Device Role / Timing Role: High-CMTI isolator for gate drive enable and fault feedback, ensuring no false turn-on during 50 kV/µs transients. Use Value: Prevents shoot-through failures via reliable signal transmission with >25 kV/µs immunity and 1.6 µs refresh guarantee. |
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; 5000 VRMS rating; 150 Mbps max; no default-high output configuration. | Lacks built-in refresh circuit; requires external pull-up for fail-safe state; higher CMTI (75 kV/µs) but narrower temp range (−40°C to +105°C). | Prefer when higher isolation voltage or CMTI is needed and default-high behavior can be implemented externally. |
| ISO7721DWR | Capacitive isolation; 5000 VRMS; 100 Mbps; default-low output only; no AEC-Q100 qualification. | Lower VIORM (800 VPEAK); lacks automotive qualification; requires separate biasing for fail-safe behavior. | Select for cost-sensitive industrial applications where AEC-Q100 and default-high logic are not required. |
Compared with SI8620ED-B-IS and ISO7721DWR, ADUM1280WARZ-RL7 uniquely combines default-high output, integrated refresh, AEC-Q100 Grade 1 qualification, and 125°C operation-making it optimal for automotive BMS and industrial safety-critical designs requiring guaranteed fail-safe behavior without external components.
Availability
ADUM1280WARZ-RL7 is available at Aetrix Electronics and suitable for industrial field bus isolation, battery monitor telemetry, and motor drive gate driver interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADUM1280WARZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The ADuM1280 family belongs to Analog Devices' iCoupler® digital isolator product line, designed specifically for replacing optocouplers in high-reliability, high-speed, and safety-certified isolation applications.
FAQ
What is the default output state of ADUM1280WARZ-RL7?
The ADUM1280WARZ-RL7 features a default-high output configuration: when power is applied only to side 2 (VDD2), both VOA and VOB output logic high. This behavior is confirmed in the ADuM1280 truth table (Table 22) and supports fail-safe system design in safety-critical applications such as battery monitors and industrial controllers.
Does ADUM1280WARZ-RL7 support level translation between 3.3 V and 5 V domains?
Yes, ADUM1280WARZ-RL7 supports mixed-supply operation: VDD1 and VDD2 may be independently set to 3.135 V–5.5 V, enabling true bidirectional level translation. For example, with VDD1 = 3.3 V and VDD2 = 5 V, inputs on side 1 reference 3.3 V logic levels while outputs on side 2 drive 5 V-compatible loads - verified in Tables 7 and 10 of the datasheet.
What safety certifications does ADUM1280WARZ-RL7 hold?
ADUM1280WARZ-RL7 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. These approvals are documented in Table 14 and Section "Regulatory Information" of the Rev. E datasheet.
How does the refresh feature of ADUM1280WARZ-RL7 ensure DC correctness?
The ADUM1280WARZ-RL7 incorporates a patented internal refresh circuit that periodically samples input states and updates outputs - even during static input conditions. With a maximum refresh period of 1.6 µs (Table 4, 6, 9, 12), it guarantees DC-correct output behavior without external watchdog circuitry, a key differentiator from optocouplers and basic capacitive isolators.
Is ADUM1280WARZ-RL7 qualified for automotive applications?
Yes, ADUM1280WARZ-RL7 is AEC-Q100 qualified (Grade 1: −40°C to +125°C ambient), explicitly stated in the "Features" and "Applications" sections of the datasheet. This qualification covers stress testing for temperature cycling, humidity, and ESD - making it suitable for battery management systems and motor control units in hybrid electric vehicles.
ADUM1280WARZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 50ns, 50ns
- Pulse Width Distortion (Max):
- 10ns
- 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
ADUM1280WARZ-RL7 FAQ
1.How can I place an order for ADUM1280WARZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1280WARZ-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 ADUM1280WARZ-RL7 reliable?
The price and inventory of ADUM1280WARZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1280WARZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1280WARZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1280WARZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1280WARZ-RL7?
ADUM1280WARZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1280WARZ-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 ADUM1280WARZ-RL7?
For technical support, including ADUM1280WARZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1280WARZ-RL7 requirements.
6.How does Aetrix verify that ADUM1280WARZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1280WARZ-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 ADUM1280WARZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1280WARZ-RL7?
All ADUM1280WARZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1280WARZ-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 ADUM1280WARZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1280WARZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1280WARZ-RL7 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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