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Analog Devices Inc. ADUM2285CRIZ
- Part No.:
- ADUM2285CRIZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM2285CRIZ.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
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Product details
Overview
ADuM2285CRIZ from Analog Devices is a 5 kVRMS dual-channel digital isolator using iCoupler® transformer-based technology, providing bidirectional signal isolation between two independent circuits. It delivers up to 100 Mbps data rate, 24 ns maximum propagation delay, and operates across 3.0 V to 5.5 V supply rails on both sides with level translation capability. Its default-low output behavior enables safe-state signaling in power-loss scenarios, making it suitable for isolated RS-485 transceiver interfaces and medical equipment safety barriers.
For engineers reviewing the ADuM2285CRIZ datasheet, ADuM2285CRIZ pinout, ADuM2285CRIZ application, or ADuM2285CRIZ equivalent, key selection criteria include reinforced insulation rating (645 VPEAK), high common-mode transient immunity (>25 kV/µs), C-grade timing performance, SOIC-16W package creepage compliance, and compatibility with 3 V/5 V mixed-supply systems.
Technical Context
The ADuM2285CRIZ implements monolithic air-core transformer coupling per channel, enabling galvanic isolation without optocoupler aging or LED drive complexity. Its patented refresh circuit maintains DC-correct output states during input inactivity, eliminating the need for external watchdog timers or periodic toggling.
It supports asymmetric voltage operation (e.g., 5 V on Side 1, 3 V on Side 2) while maintaining full 100 Mbps capability in C grade, with channel-to-channel matching of ≤2 ns pulse width distortion and ≤5 ns codirectional skew - critical for synchronous serial protocols like SPI and isolated UART.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 VRMS for 1 minute - meets UL 1577 and reinforced insulation per VDE 0884-17 |
| Data Rate | Up to 100 Mbps - supports high-speed industrial communication (e.g., isolated CAN FD gateways) |
| Propagation Delay | ≤24 ns max - enables sub-40 ns round-trip latency in closed-loop feedback systems |
| Common-Mode Transient Immunity | >25 kV/µs - sustains reliable operation in noisy motor drive or power supply environments |
| Supply Voltage Range | 3.0 V to 5.5 V per side - allows level translation between 3.3 V microcontrollers and 5 V peripherals |
| Default Output State | Low on both channels at power-up - ensures fail-safe deactivation of downstream drivers or relays |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control cabinet use |
Pinout & Package
ADuM2285CRIZ is housed in a 16-lead SOIC wide-body package (7.5 mm body width) with enhanced creepage (8.7 mm) and clearance, certified for reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17). The package features separate ground and supply pins for isolated sides, with no internal connection on 7 pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, GND1 | Side 1 Ground Reference | Return path for input-side logic; must be connected to local ground plane on primary side |
| 3, VDD1 | Side 1 Supply Input | 3.0–5.5 V power for input-side circuitry; decoupling capacitor required within 1 cm |
| 4, VIA | Input Channel A | CMOS-compatible logic input; accepts 3 V or 5 V signals regardless of VDD1 level |
| 5, VIB | Input Channel B | Independent second input; supports differential or parallel data paths across isolation barrier |
| 9, 16, GND2 | Side 2 Ground Reference | Isolated return path for output-side logic; must be separated from GND1 by ≥8.7 mm |
| 12, VOB | Output Channel B | Active-drive CMOS output; sinks/sours ±4 mA at VOL/VOH specifications |
| 13, VOA | Output Channel A | Matches VOB timing and drive strength; enables matched propagation for clock/data pairs |
| 14, VDD2 | Side 2 Supply Input | 3.0–5.5 V power for output-side circuitry; supports independent voltage domain from VDD1 |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation certification | DIN EN IEC 60747-17 (VDE 0884-17) rated at 645 VPEAK, enabling 2 MOPP in medical (IEC 60601-1) and industrial safety designs |
| Patented refresh architecture | Maintains valid logic state indefinitely without input transitions - eliminates DC blocking capacitors or protocol-layer keep-alive overhead |
| High-speed bidirectional isolation | 100 Mbps per channel with <2 ns pulse width distortion - preserves signal integrity in isolated SPI, I²C, and UART links |
| Wide supply voltage flexibility | 3.0–5.5 V on either side, including mixed 3 V/5 V operation - simplifies integration with legacy 5 V and modern 3.3 V subsystems |
| Fail-safe default-low outputs | Both outputs assert low at power-up or input-side undervoltage - prevents unintended activation of MOSFET gates or relay coils |
Applications
| Industrial Motor Drives | Medical Patient Monitoring |
|---|---|
Use Scenario: Isolating gate driver control signals from high-voltage IGBT/SiC half-bridges in servo inverters. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting PWM and fault feedback with matched propagation delay (<5 ns skew). Use Value: Prevents ground loop-induced shoot-through while preserving <40 ns timing margin for 20 kHz switching frequencies. |
Use Scenario: Separating patient-connected ECG front-end analog circuitry from digital processing unit in bedside monitors. IC Role / Device Role / Timing Role: Reinforced-isolation barrier for UART and SPI lines carrying digitized biopotential data. Use Value: Meets 2 MOPP requirement per IEC 60601-1 with 5000 VRMS withstand and 645 VPEAK working voltage. |
| Programmable Logic Controller I/O Modules | Isolated RS-485 Transceivers |
Use Scenario: Digitally isolating discrete input status (24 V DC sensors) and output control (relay/SSR drivers) in PLC backplanes. IC Role / Device Role / Timing Role: Level-translating isolator interfacing 24 V field-side logic to 3.3 V FPGA/CPU side with default-low safety state. Use Value: Eliminates optocoupler aging drift and enables direct connection to low-voltage logic without external level shifters. |
Use Scenario: Providing galvanic isolation between RS-485 transceiver ICs and host microcontrollers in building automation networks. IC Role / Device Role / Timing Role: Bidirectional isolator for DE/RE control and data lines, supporting full-duplex 10 Mbps operation. Use Value: Enables >25 kV/µs common-mode noise rejection in electrically noisy HVAC or lighting control environments. |
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 |
|---|---|---|---|
| ADuM2281CRIZ | Same package and pinout; default-high output instead of default-low | Suitable where active-high enable or reset is required at power-up | Select ADuM2281CRIZ only when system logic requires asserted-high initialization state |
| SI8621ED-IS | Capacitive isolation; 5000 VRMS rating; 100 Mbps; default-low; SOIC-16W | Higher CMTI (50 kV/µs); different UVLO thresholds (2.3 V vs. 2.4 V) | Prefer SI8621ED-IS if higher noise immunity is critical and layout allows revalidation of creepage/clearance |
Compared with ADuM2285CRIZ, ADuM2281CRIZ offers identical timing and isolation but inverted power-on behavior, while SI8621ED-IS provides superior CMTI at the cost of different failure mode characteristics and qualification documentation scope.
Availability
ADuM2285CRIZ is available at Aetrix Electronics and suitable for industrial motor drives, medical patient monitoring systems, and isolated RS-485 transceiver designs requiring stable component supply, long-term lifecycle support, and certified reinforced insulation.
Supply support for ADuM2285CRIZ 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 ADuM228x family was designed specifically for high-reliability, high-speed digital isolation in safety-critical systems - emphasizing reinforced insulation, low-latency timing, and robust operation across extended temperature and voltage ranges.
FAQ
What is the default output state of ADuM2285CRIZ at power-up?
The ADuM2285CRIZ has a default-low output state on both channels (VOA and VOB) when power is first applied or during input-side undervoltage conditions. This behavior is intrinsic to the ADuM2285/ADuM2286 variant and ensures fail-safe deactivation of downstream circuitry such as gate drivers or relay controllers. The default state is maintained until valid logic transitions are received on VIA or VIB, or until the refresh period (1.6 µs) expires after power restoration.
Does ADuM2285CRIZ support mixed-voltage operation between 3 V and 5 V domains?
Yes, ADuM2285CRIZ supports true mixed-supply operation: VDD1 and VDD2 may be independently set to 3.0–3.6 V or 4.5–5.5 V, enabling level translation across the isolation barrier. For example, it can interface a 3.3 V microcontroller (VDD1 = 3.3 V) to a 5 V RS-485 transceiver (VDD2 = 5 V) while sustaining full 100 Mbps data rate in C grade - verified in Tables 7 and 10 of the datasheet.
What safety certifications apply to ADuM2285CRIZ?
ADuM2285CRIZ carries UL 1577 (5000 VRMS, 1 min), CSA/IEC 62368-1, IEC/CSA 61010-1, IEC/CSA 60601-1 (2 MOPP), and CQC GB 4943.1 approvals. Crucially, it is certified to DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation with VIORM = 645 VPEAK, validated via partial discharge testing at 1209 VPEAK.
How does the refresh feature in ADuM2285CRIZ ensure DC correctness?
The ADuM2285CRIZ incorporates a patented internal refresh circuit that periodically samples and regenerates the output state even when input signals are static. This ensures the output remains valid (e.g., sustained LOW) without requiring external toggling or protocol-level keep-alive packets. The refresh period is fixed at 1.6 µs, guaranteeing DC correctness over indefinite idle periods - a key advantage over optocouplers and basic capacitive isolators.
Can ADuM2285CRIZ replace ADuM2201ARWZ in an existing design?
No, ADuM2285CRIZ is not a drop-in replacement for ADuM2201ARWZ. While both are dual-channel isolators in SOIC-16W packages, ADuM2201ARWZ belongs to the older ADuM220x family with different timing specs (max 10 Mbps), no refresh feature, and default-high outputs. ADuM2285CRIZ is pin-compatible with ADuM2200/ADuM2210 (not ADuM2201/ADuM2211), as confirmed in Figure 1 of the datasheet.
ADUM2285CRIZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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:
- 5000Vrms
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ADUM2285CRIZ FAQ
1.How can I place an order for ADUM2285CRIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM2285CRIZ 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 ADUM2285CRIZ reliable?
The price and inventory of ADUM2285CRIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM2285CRIZ is usually 5 days.
3.What payment methods are accepted for ADUM2285CRIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM2285CRIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM2285CRIZ?
ADUM2285CRIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM2285CRIZ 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 ADUM2285CRIZ?
For technical support, including ADUM2285CRIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM2285CRIZ requirements.
6.How does Aetrix verify that ADUM2285CRIZ is sourced from the original manufacturer or authorized distributors?
All ADUM2285CRIZ 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 ADUM2285CRIZ meets industry standards.
7.What is the process for return or replacement of ADUM2285CRIZ?
All ADUM2285CRIZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM2285CRIZ, 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 ADUM2285CRIZ part is unused and in its original packaging.
Return procedure for ADUM2285CRIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM2285CRIZ Tags
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