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Analog Devices Inc./Maxim Integrated MAX14931CAWE+
- Part No.:
- MAX14931CAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931CAWE+.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,254
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Product details
Overview
MAX14931CAWE+ from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 150Mbps maximum 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 - enabling robust signal isolation in industrial fieldbus, isolated SPI, and battery management systems.
For engineers reviewing the MAX14931CAWE+ datasheet, MAX14931CAWE+ pinout, MAX14931CAWE+ application, or MAX14931CAWE+ equivalent, this page delivers verified electrical specs (CMTI = 25kV/µs, tPLH/tPHL ≤ 8.2ns), package mapping (16-pin wide SOIC, 10.3mm × 7.5mm), safety certifications (UL1577, VDE 0884-11 Basic Insulation), and real-world design context for high-reliability multichannel isolation.
Technical Context
The MAX14931CAWE+ implements capacitive isolation with proprietary dielectric barrier technology, supporting unidirectional channel configuration (A→B only) optimized for master-to-slave interfaces like SPI clock/data lines. Its architecture enables precise timing control via enable inputs (ENA/ENB) with 5.1ns enable-to-data-valid delay at 5V supplies.
It delivers ultra-low propagation skew - channel-to-channel same-direction skew as low as 0.9ns at 5V - and integrates undervoltage lockout (1.45V–1.71V threshold) on both sides to prevent metastable outputs during power ramp-up. The device sustains continuous 443VRMS working voltage and withstands ±10kV surge per IEC 61000-4-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS for 60s (VISO); 443VRMS continuous working voltage (VIOWM) |
| Max Data Rate | 150Mbps - supports high-speed serial interfaces including fast SPI and isolated sensor buses |
| Propagation Delay | tPLH/tPHL ≤ 8.2ns at 5V - enables sub-10ns timing-critical isolation in real-time control loops |
| CMTI | 25kV/µs - ensures reliable operation in noisy motor drives and power converters |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with 1.8V/2.5V/3.3V/5V logic without level shifters |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and medical equipment |
| Output Default | Low - prevents floating states during power-up or input disconnection in safety-critical paths |
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 logic signals from microcontroller or FPGA on side A; TTL/CMOS compatible |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive downstream logic on side B; 4mA drive strength, rail-to-rail swing |
| VDDA / GNDA | Primary-side power/ground | Supplies side A circuitry; independent of side B - enables level translation |
| VDDB / GNDB | Secondary-side power/ground | Supplies side B; supports separate domain grounding for noise immunity |
| ENA / ENB | Channel enable controls | Enable/disable output drivers independently on each side; low-active, internal pull-down |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | Enables 2.75kVRMS rating with <2pF inter-side capacitance - minimizes high-frequency coupling in EMI-sensitive systems |
| Ultra-low propagation skew | 0.9ns max channel-to-channel skew at 5V - preserves timing integrity across parallel data lanes (e.g., SPI MISO/MOSI) |
| Integrated UVLO | 1.45V–1.71V threshold with 50mV hysteresis - guarantees clean output state during brown-out conditions |
| High CMTI | 25kV/µs common-mode transient immunity - maintains signal fidelity in gate-driver feedback paths and motor-control environments |
| Peak eye jitter | 140ps at 5V - supports clean signal recovery in high-speed serial links without added equalization |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
Use Scenario: Isolating RS-485 transceivers in programmable logic controllers to prevent ground loop currents and fault propagation across network nodes. IC Role / Device Role / Timing Role: Digital isolator providing galvanic separation between MCU UART peripherals and bus transceivers; handles bidirectional data flow via discrete unidirectional channels. Use Value: Enables 2.75kVRMS system-level isolation compliance while maintaining 150Mbps throughput for high-cycle diagnostic messaging. | Use Scenario: Isolating SPI clock (SCLK), MOSI, MISO, and chip-select (CS) lines between an industrial MCU and isolated ADC or DAC in a high-noise power supply monitoring module. IC Role / Device Role / Timing Role: Four independent unidirectional isolators configured as two A→B (SCLK, MOSI) and two B→A (MISO, CS) paths - though MAX14931CAWE+ is A→B only, it's used for master-driven lines. Use Value: Sub-10ns propagation delay and 0.9ns skew ensure setup/hold timing margins are preserved at 20MHz+ SPI clocks. |
| Battery Management Systems | Medical Sensor Isolation |
Use Scenario: Isolating cell voltage monitoring ICs from the main BMS controller in EV traction battery packs, where >1kV potential differences exist between modules. IC Role / Device Role / Timing Role: Unidirectional isolator transmitting analog front-end status and fault flags across isolation barrier; default-low output prevents false alarms during power sequencing. Use Value: UL1577 and VDE 0884-11 certification supports functional safety requirements (IEC 61508 SIL-2) for high-voltage battery monitoring. | Use Scenario: Isolating patient-connected ECG or EEG sensor front-ends from digital processing units in diagnostic equipment to meet IEC 60601-1 6-MOPP requirements. IC Role / Device Role / Timing Role: Galvanic barrier for digital control and status signals between isolated analog domain and host processor; operates at full spec over –40°C to +125°C ambient. Use Value: 443VRMS working voltage and 630VPK repetitive peak rating satisfy basic insulation requirements for Class I medical devices. |
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; 16-pin narrow SOIC (9.9mm × 3.9mm) | Smaller footprint but lower isolation rating; lacks 2.75kVRMS and UL/VDE certification at same level | Select when board space is constrained and 2.5kVRMS suffices; verify CMTI (25kV/µs same) and thermal derating for 125°C operation |
| ISO6741FDWR | 4-channel, 5kVRMS, 50Mbps, default-low; 16-pin SOIC (wide), TI's capacitive isolation | Higher isolation rating but lower speed; no 150Mbps support; different enable timing (tEN = 12ns typical) | Choose for ultra-high-isolation applications (e.g., grid-tied inverters) where 50Mbps is sufficient and VDE 0884-10 reinforced insulation is required |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931CAWE+ uniquely combines 2.75kVRMS isolation, 150Mbps speed, default-low behavior, and full VDE 0884-11 Basic Insulation in a single wide-SOIC package - making it optimal for high-speed industrial interfaces requiring certified reliability at extended temperature.
Availability
MAX14931CAWE+ is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, and battery management systems requiring stable component supply, long-term lifecycle support, and certified safety compliance.
Supply support for MAX14931CAWE+ 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.
The MAX1493x family is designed specifically for high-reliability multichannel digital isolation in harsh environments - emphasizing certified safety, ultra-low timing skew, and wide supply flexibility for next-generation industrial automation and energy systems.
FAQ
What is the isolation voltage rating of the MAX14931CAWE+?
The MAX14931CAWE+ is rated for 2.75kVRMS withstand isolation voltage (VISO) for 60 seconds, 443VRMS maximum working voltage (VIOWM), and 630VPK repetitive peak voltage (VIORM). It is certified to UL1577, CSA C22.2 No. 5A, and VDE 0884-11 Basic Insulation standards - confirming its suitability for reinforced insulation in industrial and medical applications.
Does the MAX14931CAWE+ support bidirectional communication?
No, the MAX14931CAWE+ is a unidirectional digital isolator with all four channels configured A→B only. For bidirectional applications such as I²C, Analog Devices recommends the MAX14933 - which provides two bidirectional channels. The MAX14931CAWE+ is optimized for master-slave protocols like SPI (clock/data out) and isolated digital I/O where directionality is fixed.
What are the supply voltage requirements for the MAX14931CAWE+?
The MAX14931CAWE+ requires independent supplies on each side: VDDA and GNDA for the input side (A), and VDDB and GNDB for the output side (B). Each supply must be between 1.71V and 5.5V. This dual-supply flexibility enables level translation - for example, interfacing a 1.8V FPGA (side A) with a 3.3V ADC (side B) - without external level shifters.
How does the enable functionality work on the MAX14931CAWE+?
The MAX14931CAWE+ features dedicated enable inputs: ENA controls all OUTA outputs (not applicable here, as MAX14931CAWE+ has no OUTA pins), and ENB enables/disables all four OUTB outputs. When ENB is low, OUTB1–OUTB4 enter high-impedance state; when high, they reflect INA1–INA4 with propagation delay. Enable-to-data-valid time is 5.1ns (typical) at 5V, supporting fast dynamic channel control in time-critical systems.
Is the MAX14931CAWE+ suitable for automotive applications?
The MAX14931CAWE+ is qualified for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements for temperature cycling and HTOL (high-temperature operating life) per Analog Devices' internal qualification. While not officially AEC-Q100 certified, its performance envelope, safety certifications (UL/VDE), and robust CMTI (25kV/µs) make it widely deployed in automotive battery management, charging infrastructure, and under-hood control modules where extended temperature and noise immunity are critical.
MAX14931CAWE+ 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:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 7.5ns, 7.4ns
- Pulse Width Distortion (Max):
- 1ns
- 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
MAX14931CAWE+ FAQ
1.How can I place an order for MAX14931CAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931CAWE+ 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 MAX14931CAWE+ reliable?
The price and inventory of MAX14931CAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931CAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14931CAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931CAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931CAWE+?
MAX14931CAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931CAWE+ 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 MAX14931CAWE+?
For technical support, including MAX14931CAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931CAWE+ requirements.
6.How does Aetrix verify that MAX14931CAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14931CAWE+ 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 MAX14931CAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14931CAWE+?
All MAX14931CAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931CAWE+, 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 MAX14931CAWE+ part is unused and in its original packaging.
Return procedure for MAX14931CAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931CAWE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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