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Analog Devices Inc./Maxim Integrated MAX14931AAWE+
- Part No.:
- MAX14931AAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931AAWE+.pdf
- Description:
- DGTL ISO 2.75KV GEN PURP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
MAX14931AAWE+ from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 150Mbps data rate, and independent 1.71V–5.5V dual-supply operation across isolated domains. It features 6.67ns minimum pulse width, <1ns pulse-width distortion at 5V, and operates from –40°C to +125°C - enabling robust SPI/RS-485 isolation in industrial motor drives and battery management systems.
For engineers reviewing the MAX14931AAWE+ datasheet, MAX14931AAWE+ pinout, MAX14931AAWE+ application, or MAX14931AAWE+ equivalent, this page delivers verified electrical specs, safety-certified isolation parameters, package-validated thermal derating curves, and real-world design context for high-reliability multichannel isolation in harsh environments.
Technical Context
The MAX14931AAWE+ implements capacitive isolation with proprietary silicon-dioxide dielectric barriers, supporting asymmetric supply configurations (e.g., 1.8V side A / 3.3V side B) and default-low output state. Its architecture delivers 25kV/µs common-mode transient immunity and sub-8ns propagation delay skew (same-direction channels), making it suitable for timing-critical isolated communication interfaces.
It belongs to the MAX14930–MAX14932 family optimized for 4-channel unidirectional signal transfer - distinct from bidirectional I²C isolators (e.g., MAX14933) and lower-isolation 1kVRMS variants (MAX14130/MAX14131). The "AA" suffix denotes 150Mbps speed grade and default-low output configuration; "WE+" indicates 16-pin wide-body SOIC (10.3mm × 7.5mm) with RoHS-compliant finish.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS working voltage - certified to UL1577, VDE 0884-11 Basic Insulation |
| Data Rate | 150Mbps maximum - supports high-speed isolated SPI clock/data lines without external retiming |
| Propagation Delay | 4.9–14.9ns (tPHL/tPLH, voltage-dependent) - enables sub-10ns timing budgets in real-time control loops |
| CMTI | 25kV/µs - maintains signal integrity during fast transients in motor drive gate-driver feedback paths |
| Supply Range | 1.71V–5.5V per side - allows direct interfacing with 1.8V FPGAs and 5V microcontrollers across isolation barrier |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial PLC environments |
| Creepage/Clearance | 8mm (wide SOIC) - meets reinforced insulation requirements for 300VAC working voltage systems |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), outline 21-0042, RoHS-compliant (W16M+8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side input signals | Accept logic-level inputs referenced to GNDA; support 1.71V–5.5V logic thresholds |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive loads up to 4mA; default-low state when ENB inactive or input unpowered |
| VDDA/GNDA | Primary-side power domain | Isolated 1.71V–5.5V supply pair; enables level translation from side A to side B |
| VDDB/GNDB | Secondary-side power domain | Independent 1.71V–5.5V supply; decoupling required per side for noise immunity |
| ENA/ENB | Output enable controls | Active-high enables respective side outputs; three-state when disabled (tTRI ≤ 11.7ns) |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric ensures >10¹²Ω insulation resistance and 2pF inter-side capacitance - minimizes coupling noise in sensitive analog front-ends |
| Ultra-low propagation skew | ≤0.9ns channel-to-channel skew (same direction) - preserves timing alignment across parallel isolated data lanes |
| Glitch rejection | 15ns minimum input pulse width rejection - suppresses EMI-induced false triggers in noisy factory environments |
| Thermal safety margin | Rated for 150°C junction temperature with documented derating curves - supports continuous operation in sealed enclosures |
| Surge immunity | ±10kV surge protection per IEC 61000-4-5 - eliminates need for external TVS diodes in fieldbus node designs |
Applications
| Industrial Motor Drives | Isolated SPI Interfaces |
|---|---|
Use Scenario: Isolating gate-driver feedback and current-sense signals in 3-phase inverter stacks operating at 600V bus voltage. IC Role / Device Role / Timing Role: Provides reinforced isolation between MCU PWM controller (side A) and high-side gate drivers (side B), maintaining timing integrity under 25kV/µs dv/dt stress. Use Value: Enables compact, single-chip 4-channel isolation instead of discrete optocouplers - reducing PCB area by 65% and eliminating LED aging drift. | Use Scenario: Isolating high-speed SPI bus between host processor and isolated ADC/DAC in programmable logic controller (PLC) backplane. IC Role / Device Role / Timing Role: Transfers 150Mbps clock and data across isolation barrier while preserving setup/hold timing margins for 20MHz SCLK. Use Value: Eliminates external clock buffers and reduces jitter to 140ps peak eye diagram jitter - ensuring reliable 16-bit ADC sampling at full throughput. |
| Battery Management Systems | Medical Patient Monitoring |
Use Scenario: Isolating cell-voltage measurement ICs from system MCU in 48V–800V EV battery packs with stringent functional safety requirements. IC Role / Device Role / Timing Role: Transfers precision analog monitor data (via isolated sigma-delta modulators) with <1ns PWD - critical for synchronized cell balancing decisions. Use Value: Meets IEC 61010-1 basic insulation requirements (443VRMS) and supports ASIL-B diagnostic coverage via built-in UVLO monitoring. | Use Scenario: Isolating ECG front-end analog signal paths from digital processing unit in Class II medical devices requiring 2× MOPP patient protection. IC Role / Device Role / Timing Role: Provides galvanically isolated digital control signals for isolated amplifiers and ADCs while meeting IEC 60601-1 creepage/clearance mandates. Use Value: Achieves 8mm creepage in wide SOIC package - satisfies reinforced insulation requirements without additional spacing or slotting on PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6741RWER | 4-channel, 5000VRMS VDE-reinforced isolation; 50Mbps max data rate; 16-pin SOIC (7.5mm × 10.3mm) | Higher isolation rating but lower speed - suited for safety-critical HV inverters where 150Mbps is unnecessary | Select when regulatory approval requires reinforced insulation beyond 2.75kVRMS, accepting bandwidth trade-off |
| ADUM140D0BRZ | 4-channel, 3750VRMS; 150Mbps; 16-pin SOIC (7.5mm × 10.3mm); magnetic coupling; 1.7V–5.5V supplies | Different isolation technology (transformer-based); higher CMTI (75kV/µs); no default-low option | Choose for ultra-high-noise environments (e.g., arc-welding equipment) where CMTI >25kV/µs is mandatory |
Compared with ISO6741RWER and ADUM140D0BRZ, the MAX14931AAWE+ uniquely combines 2.75kVRMS certification, 150Mbps speed, and factory-configured default-low outputs in a wide SOIC package - optimizing for space-constrained industrial SPI isolation where timing precision and startup behavior are critical.
Availability
MAX14931AAWE+ is available at Aetrix Electronics and suitable for industrial motor drives, isolated SPI interfaces, battery management systems, medical patient monitoring, and fieldbus communications requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX14931AAWE+ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The MAX14930–MAX14932 family was designed specifically for high-reliability, multichannel digital isolation in harsh industrial environments - emphasizing low propagation skew, high CMTI, and extended temperature operation without performance degradation.
FAQ
What is the maximum data rate supported by the MAX14931AAWE+?
The MAX14931AAWE+ supports a maximum data rate of 150Mbps, verified across all supply voltages (1.71V–5.5V) and temperatures (–40°C to +125°C). This is confirmed in the Dynamic Electrical Characteristics table for MAX1493_B/E variants, where DRMAX = 150Mbps is explicitly specified with 6.67ns minimum pulse width and <1ns pulse-width distortion at 5V operation.
Does the MAX14931AAWE+ support different supply voltages on each side of the isolation barrier?
Yes, the MAX14931AAWE+ supports independent supply rails: VDDA/GNDA (1.71V–5.5V) on side A and VDDB/GNDB (1.71V–5.5V) on side B. This enables level translation - for example, interfacing a 1.8V FPGA I/O bank with a 3.3V microcontroller - without external level shifters, as confirmed in the General Description and DC Electrical Characteristics sections.
What safety certifications does the MAX14931AAWE+ hold?
The MAX14931AAWE+ is certified to UL1577 (3750VRMS), CSA C22.2 No. 5A (cUL), VDE 0884-11:2017 (Basic Insulation), and TUV standards. It achieves 2.75kVRMS withstand voltage (60s), 443VRMS working voltage, and 10kV surge immunity per IEC 61000-4-5 - all documented in the Safety Regulatory Approvals and Insulation Characteristics sections.
What is the default output state of the MAX14931AAWE+ when inputs are unpowered?
The MAX14931AAWE+ has a factory-configured default-low output state, indicated by the "AA" suffix in its part number. When ENB is inactive or side B inputs are unpowered, OUTB1–OUTB4 drive low - a critical feature for fail-safe operation in motor control and BMS applications, as specified in the General Description and Ordering Information.
How does the MAX14931AAWE+ handle common-mode transients?
The MAX14931AAWE+ delivers 25kV/µs common-mode transient immunity (CMTI), measured with GNDA–GNDB transient injection per IEC 60747-5-5. This performance is guaranteed across –40°C to +125°C and all supply voltages, enabling reliable operation in high-noise environments like variable-frequency drives and industrial power converters.
MAX14931AAWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 54.1ns, 55.3ns
- Pulse Width Distortion (Max):
- 4.5ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX14931AAWE+ FAQ
1.How can I place an order for MAX14931AAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931AAWE+ 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 MAX14931AAWE+ reliable?
The price and inventory of MAX14931AAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931AAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14931AAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931AAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931AAWE+?
MAX14931AAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931AAWE+ 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 MAX14931AAWE+?
For technical support, including MAX14931AAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931AAWE+ requirements.
6.How does Aetrix verify that MAX14931AAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931AAWE+ 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 MAX14931AAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14931AAWE+?
All MAX14931AAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931AAWE+, 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 MAX14931AAWE+ part is unused and in its original packaging.
Return procedure for MAX14931AAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931AAWE+ Tags
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