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Analog Devices Inc./Maxim Integrated MAX14931AAWE+T
- Part No.:
- MAX14931AAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931AAWE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,104
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Product details
Overview
MAX14931AAWE+T 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 default-low output configuration, 6.67ns minimum pulse width, and operates from –40°C to +125°C - deployed in industrial RS-485 interfaces and battery management systems requiring high-speed signal integrity across safety barriers.
For engineers reviewing the MAX14931AAWE+T datasheet, MAX14931AAWE+T pinout, MAX14931AAWE+T application, or MAX14931AAWE+T equivalent, this page delivers verified electrical specs (CMTI = 25kV/µs, tPLH/tPHL ≤ 14ns), package dimensions (16-pin wide SOIC, 10.3mm × 7.5mm), safety certifications (UL1577, VDE 0884-11 Basic Insulation), and real-world design context for multichannel isolation in harsh environments.
Technical Context
The MAX14931AAWE+T implements capacitive isolation with differential signaling per channel, supporting three unidirectional configurations optimized for SPI, RS-232, and RS-485 physical layers. Its architecture enables bidirectional communication only via paired devices - not native I²C support - and integrates enable-controlled three-state outputs with 2.7ns enable-to-data-valid timing at 5V.
It uses a 1.71V–5.5V supply range on both sides, allowing level translation between 1.8V logic and 5V peripherals. The device achieves <1ps pulse-width distortion at 150Mbps and maintains 25kV/µs common-mode transient immunity under full-rated isolation voltage (2.75kVRMS for 60s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS continuous working voltage - meets UL1577 & VDE 0884-11 Basic Insulation for industrial safety compliance. |
| Data Rate | 150Mbps maximum - supports high-speed serial protocols like isolated SPI clock/data lines without timing bottlenecks. |
| Propagation Delay | tPLH/tPHL ≤ 14ns (typ) at 5V - ensures sub-15ns channel-to-channel skew for time-critical control loops. |
| CMTI | 25kV/µs - rejects fast transients in motor drives and power converters without output glitches. |
| Supply Range | 1.71V–5.5V per side - enables direct interfacing with 1.8V FPGAs and 5V microcontrollers without external level shifters. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive and industrial PLC applications. |
| Output Default | Low - prevents floating states during power-up or fault conditions in fail-safe systems. |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), creepage/clearance ≥8mm, RoHS-compliant (W16M+8 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side input channels | Accept digital signals referenced to GNDA; VIH = 0.7×VDDA, VIL = 0.6–0.8V depending on supply. |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive loads referenced to GNDB; VOH = VDDB–0.4V, VOL = 0.4V at 4mA sink/source. |
| VDDA / GNDA | Primary-side power domain | Supplies input logic and internal isolation circuitry; supports 1.71–5.5V with UVLO at 1.58V (typ). |
| VDDB / GNDB | Secondary-side power domain | Supplies output drivers and isolation barrier receiver; independent of VDDA for true galvanic separation. |
| ENA / ENB | Channel enable inputs | Enable/disable all four outputs simultaneously; tEN = 5.1ns (typ) at 5V, tTRI = 2.7ns (typ). |
Key Features
| Feature | Design Value |
|---|---|
| High-speed isolation | 150Mbps data rate with 6.67ns minimum pulse width enables real-time sensor feedback in servo drives. |
| Robust transient immunity | 25kV/µs CMTI ensures reliable operation in noisy factory-floor environments with switching power supplies. |
| Dual-supply level translation | Independent 1.71–5.5V rails on each side eliminate need for external voltage translators in mixed-voltage systems. |
| Fail-safe output state | Default-low configuration guarantees known logic state during power sequencing or brownout events. |
| Safety-certified barrier | UL1577 (3750VRMS), VDE 0884-11 (630VPK repetitive peak), and IEC 61000-4-5 ±10kV surge rated for industrial deployment. |
Applications
| Industrial Fieldbus Interface | Isolated SPI Communication |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in programmable logic controllers to prevent ground loop damage and noise coupling. IC Role / Device Role / Timing Role: Digital isolator bridging controller UART and bus transceiver, handling full-duplex signaling at up to 25Mbps. Use Value: Enables 2.75kVRMS isolation margin while maintaining 150Mbps headroom for future protocol upgrades and jitter-tolerant timing. |
Use Scenario: Separating MCU SPI master from isolated ADC or DAC in precision measurement systems. IC Role / Device Role / Timing Role: Unidirectional isolator for SCLK/MOSI lines and separate path for MISO, preserving setup/hold timing at 10MHz+ clocks. Use Value: Sub-15ns propagation delay and <1ns pulse-width distortion ensure deterministic sampling window alignment across isolation boundary. |
| Battery Management System | Medical Sensor Isolation |
|
Use Scenario: Isolating cell monitor ICs from host MCU in EV battery packs operating at >400V DC bus potential. IC Role / Device Role / Timing Role: High-CMTI isolator for voltage/current telemetry streams, with default-low outputs preventing false fault assertions during startup. Use Value: 443VRMS working voltage rating and 125°C ambient operation meet ASIL-B functional safety requirements for BMS monitoring paths. |
Use Scenario: Galvanically isolating ECG/EEG front-end analog signal chains from digital processing units in diagnostic equipment. IC Role / Device Role / Timing Role: Low-jitter isolator for digital control signals (e.g., gain selection, filter config) between patient-connected and mains-referenced domains. Use Value: 2pF barrier capacitance minimizes signal coupling; VDE certification satisfies IEC 60601-1 MOOP requirements for medical electrical equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-B-IS | 4-channel, 2.5kVRMS, 150Mbps, default-high output, QSOP-16 package (6mm × 5mm) | Smaller footprint but lower creepage (4mm); lacks 125°C rating - limited to commercial temp range (–40°C to +105°C) | Select when board space is constrained and full industrial temperature range is not required. |
| ISO6741FDWR | 4-channel, 5kVRMS, 50Mbps, default-low, SOIC-16 narrow body (9.9mm × 3.9mm) | Higher isolation rating but lower speed; higher CMTI (75kV/µs) - suited for HV gate driver feedback, not high-speed comms | Select when surge immunity and reinforced insulation outweigh data rate needs, e.g., in solar inverter control. |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931AAWE+T uniquely combines 2.75kVRMS isolation, 150Mbps speed, 125°C operation, and default-low outputs in a wide SOIC package - making it optimal for high-reliability industrial communications where thermal margin and fail-safe behavior are critical.
Availability
MAX14931AAWE+T is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, isolated SPI subsystems, and battery management systems requiring stable component supply across extended temperature and safety-critical use cases.
Supply support for MAX14931AAWE+T 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX14930–MAX14932 family was designed specifically for robust, high-speed galvanic isolation in harsh industrial environments - emphasizing low propagation skew, high CMTI, and extended temperature reliability over cost-optimized consumer-grade alternatives.
FAQ
What is the maximum data rate supported by the MAX14931AAWE+T?
The MAX14931AAWE+T supports a maximum data rate of 150Mbps, verified across its full operating temperature range (–40°C to +125°C) and supply voltage range (1.71V–5.5V). This performance is achieved with guaranteed minimum pulse width of 6.67ns and typical propagation delay skew under 1ns, enabling reliable high-speed serial communication in isolated SPI and RS-485 applications.
Does the MAX14931AAWE+T support bidirectional communication on individual channels?
No, the MAX14931AAWE+T is a unidirectional 4-channel isolator - INA1–INA4 drive OUTB1–OUTB4 only. Bidirectional protocols like I²C require two devices (e.g., one for SDA/SCL up, one for down) or a dedicated bidirectional part such as the MAX14933. The MAX14931AAWE+T's channel direction is fixed at manufacture and cannot be reconfigured.
What safety certifications does the MAX14931AAWE+T hold?
The MAX14931AAWE+T is certified to UL1577 (3750VRMS isolation), VDE 0884-11:2017 (Basic Insulation, 630VPK repetitive peak), and meets IEC 61000-4-5 surge immunity (±10kV). It also complies with IEC 60950-1 and IEC 61010-1 for 443VRMS working voltage, and carries TÜV certification for medical (IEC 60601-1) and industrial safety standards.
How does the default-low output configuration of the MAX14931AAWE+T improve system reliability?
The MAX14931AAWE+T defaults to logic-low outputs when inputs are unpowered or undriven - preventing undefined states during power-up, brownout, or controller reset. This fail-safe behavior eliminates spurious activation of downstream actuators or transceivers, reducing risk of latch-up or miscommunication in safety-critical industrial and battery management applications.
Can the MAX14931AAWE+T operate with different supply voltages on each side (e.g., 1.8V on side A, 5V on side B)?
Yes, the MAX14931AAWE+T supports independent 1.71V–5.5V supplies on VDDA/GNDA and VDDB/GNDB - enabling seamless level translation between 1.8V FPGA I/O and 5V RS-485 transceivers without external translators. Input thresholds scale with respective supplies (VIH = 0.7×VDDx), and output drive strength adapts to VDDB, ensuring robust signal integrity across domains.
MAX14931AAWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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+T FAQ
1.How can I place an order for MAX14931AAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931AAWE+T 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+T reliable?
The price and inventory of MAX14931AAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931AAWE+T is usually 5 days.
3.What payment methods are accepted for MAX14931AAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931AAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931AAWE+T?
MAX14931AAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931AAWE+T 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+T?
For technical support, including MAX14931AAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931AAWE+T requirements.
6.How does Aetrix verify that MAX14931AAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931AAWE+T 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+T meets industry standards.
7.What is the process for return or replacement of MAX14931AAWE+T?
All MAX14931AAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931AAWE+T, 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+T part is unused and in its original packaging.
Return procedure for MAX14931AAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931AAWE+T Tags
-
ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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