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Analog Devices Inc. ADN4655BRSZ
- Part No.:
- ADN4655BRSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADN4655BRSZ.pdf
- Description:
- DGT ISO 3750VRMS 2CH LVDS 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
ADN4655BRSZ from Analog Devices is a dual-channel, 5 kVRMS galvanically isolated LVDS buffer supporting up to 1.1 Gbps data rates with 4 ns typical propagation delay, 2.6 psRMS random jitter, and fail-safe output high for open/short/terminated inputs. It operates across −40°C to +125°C and targets high-speed isolated data links in industrial imaging and analog front-end systems.
For engineers reviewing the ADN4655BRSZ datasheet, ADN4655BRSZ pinout, ADN4655BRSZ application, or ADN4655BRSZ equivalent, key selection criteria include isolation rating (5 kVRMS), LVDS compliance (TIA/EIA-644-A), dual-channel directionality (input-side DIN1/DIN2 → output-side DOUT1/DOUT2), fail-safe behavior, and SOIC_W package compatibility with 7.8 mm creepage.
Technical Context
The ADN4655BRSZ integrates iCoupler® digital isolation with LVDS transceivers on both sides of the barrier, enabling drop-in isolation of existing LVDS signal chains without protocol or timing layer changes. Its architecture includes integrated LDOs accepting 3.3 V input to generate regulated 2.5 V supplies for low-jitter operation.
Unlike ADN4654 (bidirectional channel pairing) and ADN4656 (reversed I/O mapping), ADN4655BRSZ implements unidirectional channel flow: Side 1 (pins 1–10) hosts DIN1+/DIN1− and DIN2+/DIN2− inputs, while Side 2 (pins 11–20) provides DOUT1+/DOUT1− and DOUT2+/DOUT2− outputs - with fail-safe logic ensuring Logic 1 output under idle input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5 kVRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and VDE V 0884-10 (VIORM = 424 VPEAK) |
| Data Rate | Up to 1.1 Gbps - supports high-speed serial links including PRBS23 at full rate with <90 ps peak-to-peak total jitter |
| Propagation Delay | 4 ns typical - enables precise timing alignment in deterministic real-time systems |
| Jitter Performance | 2.6 psRMS random jitter - preserves signal integrity for multi-gigabit eye diagrams |
| Supply Configuration | 2.5 V core supply (VDD1/VDD2); optional 3.3 V input (VIN1/VIN2) with internal LDO - simplifies power design in mixed-voltage systems |
| Fail-Safe Output | Logic high on DOUTx± when |VID| < 100 mV (open, short, or terminated but undriven) - prevents undefined states in fault conditions |
| Common-Mode Transient Immunity | >25 kV/μs - maintains data integrity in noisy industrial environments with fast-switching power stages |
Pinout & Package
ADN4655BRSZ uses a 20-lead wide-body SOIC_W (RW-20) package with 7.8 mm minimum creepage and clearance, optimized for reinforced 5 kVRMS isolation. Pin 1–10 form the input side (Side 1), pins 11–20 the output side (Side 2), with GND1/GND2 and VDD1/VDD2 split across domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | VIN1 / VIN2 | Optional 3.3 V LDO inputs for Side 1/Side 2 - bypassed externally to enable 2.5 V regulation |
| 2, 4, 10 / 11, 17, 19 | GND1 / GND2 | Isolated ground references - must not be connected; defines separate return paths for each domain |
| 3, 9 / 12, 18 | VDD1 / VDD2 | 2.5 V core supply pins - require local 0.1 μF decoupling; powered internally via LDO or externally |
| 5, 6 / 15, 16 | DIN1+/DIN1− / DOUT1+/DOUT1− | Channel 1 differential input/output pair - unidirectional flow from Side 1 to Side 2 |
| 7, 8 / 13, 14 | DOUT2+/DOUT2− / DIN2+/DIN2− | Channel 2 differential output/input pair - cross-mapped to support asymmetric routing |
Key Features
| Feature | Design Value |
|---|---|
| TIA/EIA-644-A LVDS Compliance | Guaranteed 250–450 mV differential output voltage into 100 Ω load - ensures interoperability with standard LVDS receivers |
| Integrated LDO Regulators | Accepts 3.0–3.6 V on VIN1/VIN2 to deliver stable 2.375–2.625 V for VDD1/VDD2 - eliminates need for external low-noise 2.5 V regulators |
| Fail-Safe Receiver Logic | Forces DOUTx± high when input differential voltage falls below 100 mV - prevents metastability in disconnected or faulty link scenarios |
| High CMOS Noise Immunity | −75 dBc power supply ripple rejection - suppresses phase spurs induced by switching noise on VDD rails |
| Robust ESD Protection | ±8 kV HBM on LVDS pins across isolation barrier - exceeds IEC 61000-4-2 Level 4 for system-level reliability |
Applications
| Medical Imaging Data Isolation | Industrial PLC Backplane Links |
|---|---|
|
Use Scenario: Transmitting high-resolution X-ray or MRI sensor data from isolated acquisition modules to central processing units over long PCB traces. IC Role / Device Role / Timing Role: Dual-channel LVDS isolator bridging analog front-end (AFE) domain and digital processing domain while maintaining sub-nanosecond timing alignment. Use Value: Enables 1.1 Gbps throughput with <90 ps total jitter, preserving image fidelity and eliminating ground-loop artifacts in Class II medical equipment. |
Use Scenario: Isolating high-speed control data between CPU and I/O expansion modules in modular programmable logic controllers operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Unidirectional dual-channel isolator providing galvanic separation between safety-critical logic and field-side analog/digital I/O. Use Value: Delivers >25 kV/μs common-mode transient immunity and fail-safe outputs to prevent erroneous actuation during motor drive switching events. |
| Test & Measurement Equipment | Avionics Sensor Interfaces |
|
Use Scenario: Isolating digitized RF sampling data between ADC front-ends and FPGA-based signal processors in high-precision oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Low-jitter LVDS isolator preserving signal integrity across isolation barrier for time-domain analysis requiring picosecond-level accuracy. Use Value: Achieves 2.6 psRMS random jitter and 4 ns propagation delay - critical for maintaining ENOB and SFDR in 12+ bit, 1+ GSPS acquisition systems. |
Use Scenario: Interfacing isolated inertial measurement units (IMUs) and radar altimeters to flight control computers in commercial aircraft avionics bays. IC Role / Device Role / Timing Role: Radiation-tolerant dual-channel isolator meeting DO-160 Section 22 lightning-induced transient requirements. Use Value: Certified to VDE V 0884-10 reinforced insulation (VIORM = 424 VPEAK) and rated for −40°C to +125°C operation - satisfies RTCA DO-160G environmental compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS isolation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADN4654BRSZ | No fail-safe output; bidirectional channel pairing (DIN1↔DOUT1, DIN2↔DOUT2) | Suitable for bidirectional LVDS links like camera control interfaces where reverse communication is required | Select ADN4654BRSZ only if bidirectional signaling and absence of fail-safe logic are acceptable |
| ADN4655BRWZ | Same functionality and pinout, but in 20-lead SSOP package with 3.75 kVRMS isolation rating | Preferred for space-constrained designs where lower isolation voltage suffices and smaller footprint is prioritized | Choose ADN4655BRWZ when board area is limited and 3.75 kVRMS meets safety requirements |
Compared with ADN4654BRSZ, ADN4655BRSZ adds fail-safe output behavior and enforces unidirectional data flow - critical for safety-critical isolation where undefined states must be avoided. Against ADN4655BRWZ, it trades package size for higher 5 kVRMS isolation and wider creepage, making it suitable for mains-connected industrial equipment.
Availability
ADN4655BRSZ is available at Aetrix Electronics and suitable for industrial imaging systems, PLC backplanes, and test & measurement equipment requiring stable component supply, long-term lifecycle assurance, and certified 5 kVRMS isolation performance.
Supply support for ADN4655BRSZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, industrial automation, and communications infrastructure.
The ADN4655BRSZ belongs to Analog Devices' iCoupler® LVDS isolator product line, designed specifically to enable robust, high-speed galvanic isolation in noise-sensitive data acquisition and real-time control systems.
FAQ
What is the isolation voltage rating of the ADN4655BRSZ?
The ADN4655BRSZ is rated for 5 kVRMS isolation per UL 1577 for 1 minute and complies with VDE V 0884-10 reinforced insulation standards (VIORM = 424 VPEAK). This rating applies to the 20-lead SOIC_W package and is validated through 100% production testing at ≥6000 VRMS.
Does the ADN4655BRSZ support bidirectional LVDS communication?
No, the ADN4655BRSZ implements unidirectional channel mapping: DIN1+/DIN1− and DIN2+/DIN2− are input-only on Side 1, while DOUT1+/DOUT1− and DOUT2+/DOUT2− are output-only on Side 2. For bidirectional operation, consider the ADN4654BRSZ instead.
How does the fail-safe feature operate in the ADN4655BRSZ?
The ADN4655BRSZ forces DOUTx± high when the differential input voltage |VID| drops below 100 mV - covering open-circuit, shorted, or terminated-but-undriven conditions. The fail-safe delay is 1.2 μs maximum, ensuring rapid transition to safe state during link faults.
Can the ADN4655BRSZ operate with a 3.3 V supply only?
Yes - the ADN4655BRSZ accepts 3.0–3.6 V on VIN1/VIN2 to power internal LDOs that generate regulated 2.5 V supplies for VDD1/VDD2. External 2.5 V supplies are also supported by connecting VINx directly to VDDx, bypassing the LDO.
What package type is used by the ADN4655BRSZ?
The ADN4655BRSZ uses a 20-lead wide-body SOIC_W (RW-20) package with 7.8 mm minimum creepage and clearance. This package is distinct from the SSOP variant (ADN4655BRWZ) and supports the full 5 kVRMS isolation rating.
ADN4655BRSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- LVDS
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 1.1Gbps
- Propagation Delay tpLH / tpHL (Max):
- 4.5ns, 4.5ns
- Pulse Width Distortion (Max):
- -
- Rise / Fall Time (Typ):
- 0.35ns, 0.35ns (Max)
- Voltage - Supply:
- 2.375V ~ 2.625V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
ADN4655BRSZ FAQ
1.How can I place an order for ADN4655BRSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADN4655BRSZ 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 ADN4655BRSZ reliable?
The price and inventory of ADN4655BRSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADN4655BRSZ is usually 5 days.
3.What payment methods are accepted for ADN4655BRSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADN4655BRSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADN4655BRSZ?
ADN4655BRSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADN4655BRSZ 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 ADN4655BRSZ?
For technical support, including ADN4655BRSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADN4655BRSZ requirements.
6.How does Aetrix verify that ADN4655BRSZ is sourced from the original manufacturer or authorized distributors?
All ADN4655BRSZ 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 ADN4655BRSZ meets industry standards.
7.What is the process for return or replacement of ADN4655BRSZ?
All ADN4655BRSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADN4655BRSZ, 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 ADN4655BRSZ part is unused and in its original packaging.
Return procedure for ADN4655BRSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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