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Analog Devices Inc. ADUM1285ARZ-RL7
- Part No.:
- ADUM1285ARZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADUM1285ARZ-RL7.pdf
- Description:
- DGTL ISO 3000VRMS 2CH GP 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,412
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Product details
Overview
ADUM1285ARZ-RL7 from Analog Devices is a 3 kVRMS dual-channel digital isolator using iCoupler® transformer-based technology, providing bidirectional signal isolation with default-low 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 ranges on both sides for level translation - deployed in battery monitor systems and motor drive interfaces where high common-mode transient immunity (>25 kV/µs) is critical.
For engineers reviewing the ADUM1285ARZ-RL7 datasheet, ADUM1285ARZ-RL7 pinout, ADUM1285ARZ-RL7 application, or ADUM1285ARZ-RL7 equivalent, this page delivers verified specifications, SOIC-8 pin mapping, automotive-grade safety certifications (AEC-Q100, VDE 0884-17), and real-world use context for industrial field bus and data converter isolation design.
Technical Context
The ADUM1285ARZ-RL7 implements two independent galvanic isolation channels using monolithic air-core transformers, enabling dc-correct operation via patented refresh circuitry that maintains output state during input inactivity. Its architecture supports mixed-voltage operation (e.g., 3.3 V side 1 / 5 V side 2), with input thresholds defined as 0.3×VDDx and 0.7×VDDx for robust noise margin.
Each channel features matched propagation delay (≤5 ns codirectional skew, ≤10 ns opposing-direction skew at C grade), <2 ns pulse width distortion, and guaranteed operation from −40°C to +125°C. The device meets reinforced insulation requirements per DIN EN IEC 60747-17 (VIORM = 565 VPEAK, VISO = 3000 VRMS/1 min) and carries AEC-Q100 qualification for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 100 Mbps NRZ - enables high-speed SPI, RS-485, or CAN FD signal isolation without timing bottlenecks. |
| Propagation Delay | 23 ns typical - ensures tight timing alignment in feedback loops and real-time control paths. |
| Common-Mode Transient Immunity | >25 kV/µs - sustains reliable operation in noisy motor drive or battery monitoring environments with fast voltage transients. |
| Isolation Rating | 3000 VRMS for 1 minute - certified for reinforced insulation per UL 1577 and VDE 0884-17. |
| Supply Range | 3.135 V–5.5 V on both sides - supports bidirectional level translation between 3.3 V and 5 V domains. |
| Default Output State | Low - ensures fail-safe behavior in power-loss scenarios for downstream logic or gate drivers. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions. |
Pinout & Package
Narrow-body RoHS-compliant 8-lead SOIC package (SOIC_N), 5.3 mm × 6.2 mm footprint, 1.27 mm pitch, with creepage and clearance ≥4.0 mm per IEC 62368-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD1 | Input-side power supply | Accepts 3.135 V–5.5 V; powers channel inputs and internal logic on side 1. |
| 2 - VIA | Input A | Logic input for channel A; referenced to VDD1/GND1; threshold at 0.3×VDD1 / 0.7×VDD1. |
| 3 - VIB | Input B | Logic input for channel B; same electrical interface as VIA. |
| 4 - GND1 | Input-side ground | Reference return for VDD1, VIA, and VIB; must be isolated from GND2. |
| 5 - GND2 | Output-side ground | Reference return for VDD2, VOA, and VOB; galvanically separated from GND1. |
| 6 - VOB | Output B | Default-low isolated output; drives loads up to ±10 mA; VOH = VDD2 − 0.4 V @ 3.2 mA. |
| 7 - VOA | Output A | Default-low isolated output; identical drive capability and logic behavior as VOB. |
| 8 - VDD2 | Output-side power supply | Accepts 3.135 V–5.5 V; powers outputs and internal logic on side 2. |
Key Features
| Feature | Design Value |
|---|---|
| Patented refresh circuitry | Maintains dc-correct output state indefinitely during input inactivity - eliminates need for external watchdog or clock injection. |
| Bidirectional level translation | Supports 3.3 V ↔ 5 V signaling across isolation barrier without external level shifters. |
| AEC-Q100 qualified | Qualified for automotive applications including battery management and motor control subsystems. |
| High CMTI | Immunity >25 kV/µs ensures stable operation in high-di/dt environments like IGBT gate driving or current sensing. |
| Reinforced insulation | VIORM = 565 VPEAK, VISO = 3000 VRMS/1 min - meets safety requirements for functional isolation in medical and industrial equipment. |
Applications
| Battery Monitor Systems | Motor Drive Feedback Loops |
|---|---|
|
Use Scenario: Isolating cell voltage and temperature sensor signals from high-voltage battery packs in EVs and ESS. IC Role / Device Role / Timing Role: Dual-channel isolator conveying analog-to-digital converter outputs and status flags across 400 V+ potential differences. Use Value: Prevents ground loop errors and protects low-voltage MCU from transients while maintaining 100 Mbps sampling synchronization. |
Use Scenario: Transmitting PWM gate signals and fault feedback between MCU and IGBT/SiC driver stages in inverters. IC Role / Device Role / Timing Role: Providing matched-propagation-delay isolation for complementary high-side/low-side gate drive signals. Use Value: Enables precise dead-time control with ≤5 ns channel matching, reducing shoot-through risk in high-frequency switching. |
| Industrial Field Bus Interfaces | Data Converter Isolation |
|
Use Scenario: Isolating RS-485 transceiver data lines in PLC backplanes exposed to 2 kV surge events. IC Role / Device Role / Timing Role: Bidirectional digital isolator handling full-duplex UART traffic between controller and bus PHY. Use Value: Delivers 25 kV/µs CMTI and 3000 VRMS isolation to meet IEC 61000-4-5 Level 4 immunity requirements. |
Use Scenario: Isolating serial interface (SPI) between precision ADC/DAC and host processor in medical imaging front-ends. IC Role / Device Role / Timing Role: Transmitting conversion results and configuration commands across isolation barrier with sub-ns jitter. Use Value: Preserves 16-bit+ resolution by minimizing timing skew and eliminating ground noise coupling into analog sections. |
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 |
|---|---|---|---|
| SI8621ED-B-IS | Capacitive isolation; 5000 VRMS rating; 150 Mbps max; no default-low output state. | Higher isolation voltage but lacks fail-safe default-low behavior required in safety-critical shutdown paths. | Select when higher isolation rating is prioritized over deterministic power-loss response. |
| ISO7721DR | Capacitive isolation; 5000 VRMS; 100 Mbps; default-high output only; no AEC-Q100 qualification. | Not qualified for automotive use; unsuitable for battery monitor systems requiring AEC-Q100 compliance. | Prefer for cost-sensitive industrial applications where automotive qualification is unnecessary. |
Compared with SI8621ED-B-IS and ISO7721DR, ADUM1285ARZ-RL7 uniquely combines default-low output, AEC-Q100 qualification, and 25 kV/µs CMTI - making it the only option among the three validated for fail-safe battery monitoring in electric vehicles.
Availability
ADUM1285ARZ-RL7 is available at Aetrix Electronics and suitable for battery management systems, motor drive feedback circuits, industrial field bus interfaces, and precision data converter isolation requiring stable component supply across automotive and industrial production cycles.
Supply support for ADUM1285ARZ-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 ADuM128x family was designed specifically for high-reliability, high-CMTI digital isolation in safety-critical automotive and industrial systems - emphasizing fail-safe defaults, extended temperature operation, and regulatory compliance.
FAQ
What is the default output state of ADUM1285ARZ-RL7?
The ADUM1285ARZ-RL7 has a default-low output state on both channels (VOA and VOB). When power is first applied or if input-side power (VDD1) is lost while output-side power (VDD2) remains active, the outputs drive low - a fail-safe behavior critical for gate driver disable or system shutdown sequences. This distinguishes ADUM1285ARZ-RL7 from ADUM1280/ADUM1281, which default high.
Does ADUM1285ARZ-RL7 support level translation between 3.3 V and 5 V domains?
Yes, ADUM1285ARZ-RL7 supports bidirectional level translation: VDD1 can operate from 3.135 V to 5.5 V independently of VDD2, which also accepts 3.135 V to 5.5 V. This allows direct interfacing between 3.3 V microcontrollers and 5 V peripherals - for example, isolating an SPI bus from a 3.3 V MCU to a 5 V ADC - without external level shifters.
What safety certifications does ADUM1285ARZ-RL7 hold?
ADUM1285ARZ-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. It is also AEC-Q100 qualified for automotive applications - confirming reliability under thermal cycling, vibration, and humidity stress.
How does the refresh feature of ADUM1285ARZ-RL7 ensure DC correctness?
The ADUM1285ARZ-RL7 uses a patented internal refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier - even when input signals are static. This guarantees dc-correct output behavior indefinitely, eliminating the need for external clocking or periodic toggling required by optocouplers or some capacitive isolators.
What is the maximum common-mode transient immunity (CMTI) of ADUM1285ARZ-RL7?
ADUM1285ARZ-RL7 achieves >25 kV/µs common-mode transient immunity, tested per IEC 61000-4-4 with 800 V transients at 1000 V common-mode bias. This performance enables reliable operation in high-noise environments such as motor drives, where rapid voltage swings across isolation barriers would disrupt lesser isolators.
ADUM1285ARZ-RL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADUM1285ARZ-RL7 FAQ
1.How can I place an order for ADUM1285ARZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM1285ARZ-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 ADUM1285ARZ-RL7 reliable?
The price and inventory of ADUM1285ARZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM1285ARZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM1285ARZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM1285ARZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM1285ARZ-RL7?
ADUM1285ARZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM1285ARZ-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 ADUM1285ARZ-RL7?
For technical support, including ADUM1285ARZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM1285ARZ-RL7 requirements.
6.How does Aetrix verify that ADUM1285ARZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM1285ARZ-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 ADUM1285ARZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM1285ARZ-RL7?
All ADUM1285ARZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM1285ARZ-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 ADUM1285ARZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM1285ARZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM1285ARZ-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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