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Analog Devices Inc./Maxim Integrated MAX14931AASE+T
- Part No.:
- MAX14931AASE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14931AASE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,470
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Product details
Overview
MAX14931AASE+T from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 25Mbps data rate, and independent 1.71V–5.5V dual-supply operation across isolated domains. It features default-low output configuration, 25kV/µs common-mode transient immunity, and operates from –40°C to +125°C - enabling robust signal isolation in industrial fieldbus and isolated SPI interfaces.
For engineers reviewing the MAX14931AASE+T datasheet, MAX14931AASE+T pinout, MAX14931AASE+T application, or MAX14931AASE+T equivalent, this device supports high-speed multichannel isolation with precise timing (tPLH/tPHL ≤ 28.8ns), low propagation skew (≤3ns channel-to-channel), and seamless level translation between mixed-voltage systems.
Technical Context
The MAX14931AASE+T implements capacitive isolation with proprietary silicon-dioxide barrier technology, supporting unidirectional channel mapping (A→B only) and integrated enable control per side. Its architecture delivers deterministic timing with pulse-width distortion <2.6ns and enables direct interfacing with 1.8V/2.5V/3.3V/5V microcontrollers and FPGAs without external level shifters.
It complies with VDE 0884-11 Basic Insulation (VIORM = 630VPK, VIOWM = 443VRMS), UL 1577 (2750VRMS for 60s), and IEC 61000-4-5 ±10kV surge protection. The device is rated for continuous operation at ambient temperatures up to +125°C and supports safety-critical designs requiring reinforced insulation integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS continuous working voltage - meets reinforced insulation requirements for industrial safety standards. |
| Data Rate | 25Mbps maximum - supports high-speed isolated SPI clock/data lines and real-time sensor feedback loops. |
| Propagation Delay | tPLH/tPHL ≤ 28.8ns (typ @ 3.3V) - ensures sub-30ns latency for time-critical control signals. |
| CMTI | ≥25kV/µs - maintains signal integrity in noisy motor drives and power converter environments. |
| Supply Range | 1.71V to 5.5V on both sides - enables bidirectional level translation between legacy 5V logic and modern 1.8V I/O. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery management systems. |
| Output Default | Low-state default on all outputs when input unpowered - prevents undefined states during power sequencing. |
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 digital inputs | Accept CMOS/LVTTL logic referenced to GNDA; support 1.71V–5.5V input thresholds. |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive loads up to 4mA; VOH ≥ VDDB–0.4V, VOL ≤ 0.4V - compatible with standard logic families. |
| VDDA / VDDB | Isolated power supplies | Independent 1.71V–5.5V rails allow level-shifting; undervoltage lockout at 1.58V prevents metastability. |
| GNDA / GNDB | Isolated ground references | Galvanically separated grounds enable noise rejection between power domains. |
| ENA / ENB | Channel enable controls | Active-high enables output drivers; tEN ≤ 5.5ns (typ @ 3.3V) for fast enable/disable sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric with 2pF inter-side capacitance - minimizes coupling noise and enables high CMTI. |
| Low-skew timing | ≤3ns channel-to-channel propagation delay skew - critical for synchronous multi-bit protocols like isolated SPI. |
| Glitch rejection | 15ns minimum pulse rejection - suppresses EMI-induced false transitions in electrically harsh environments. |
| Surge immunity | ±10kV surge per IEC 61000-4-5 - protects downstream circuitry in industrial fieldbus nodes. |
| Thermal derating | 1126.8mW max power at +70°C (wide SOIC); θJA = 71°C/W - supports reliable operation in sealed enclosures. |
Applications
| Industrial Fieldbus Node | Isolated SPI Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers and microcontroller UART lines in programmable logic controllers. IC Role / Device Role: Signal-level galvanic barrier between noisy field-side bus and clean controller-side logic. Use Value: Prevents ground loop currents and common-mode transients from disrupting communication at 25Mbps. |
Use Scenario: Connecting isolated ADCs or DACs to host MCU via SPI in battery management systems. IC Role / Device Role: Unidirectional isolation of SCLK, MOSI, and MISO lines with matched timing. Use Value: Enables 25Mbps full-duplex SPI while maintaining <3ns channel skew for accurate sampling alignment. |
| Medical Sensor Isolation | Motor Drive Feedback Loop |
|
Use Scenario: Isolating patient-connected analog front-end signals from main system processor in diagnostic equipment. IC Role / Device Role: Reinforced insulation barrier meeting IEC 60601-1 MOOP requirements. Use Value: Provides 2.75kVRMS isolation and 443VRMS working voltage - certified for medical basic insulation. |
Use Scenario: Transmitting encoder or current-sense feedback from high-voltage inverter stage to low-voltage control MCU. IC Role / Device Role: High-CMTI digital isolator for position/speed data in servo drives. Use Value: 25kV/µs CMTI rejects fast dv/dt noise from IGBT switching, preventing erroneous fault triggers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX14931AUTP+ | Same 25Mbps speed and 2.75kVRMS rating, but in 16-pin TQFN (3mm × 3mm) package - 73% smaller footprint. | Preferred for space-constrained PCBs; thermal resistance differs (θJA = 42°C/W vs. 71°C/W). | Select when board area is limited and thermal management allows lower power dissipation margin. |
| ADUM3401BRWZ | 25Mbps, 2.5kVRMS isolation, 16-pin wide SOIC; uses iCoupler® magnetic isolation; higher supply current (8.2mA/ch @ 25Mbps). | Compatible pinout but different enable behavior and no default-low output option. | Choose if magnetic isolation is preferred for EMI immunity or if existing ADI iCoupler design reuse is required. |
Compared with MAX14931AASE+T, MAX14931AUTP+ saves board space but requires revalidation of thermal performance, while ADUM3401BRWZ offers magnetic isolation trade-offs and lacks configurable default output state - making MAX14931AASE+T optimal for high-density, thermally stable, default-safe industrial designs.
Availability
MAX14931AASE+T is available at Aetrix Electronics and suitable for industrial automation, isolated SPI interfaces, and medical sensor systems requiring stable component supply, long-term lifecycle support, and certified safety isolation.
Supply support for MAX14931AASE+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 high-reliability, high-speed multichannel isolation in harsh industrial and medical environments - emphasizing safety certification, timing precision, and mixed-voltage interoperability.
FAQ
What is the isolation voltage rating of the MAX14931AASE+T?
The MAX14931AASE+T is rated for 2.75kVRMS withstand voltage for 60 seconds (VISO), 443VRMS continuous working voltage (VIOWM), and 630VPK repetitive peak voltage (VIORM). It is certified to UL 1577, VDE 0884-11 (Basic Insulation), and IEC 61000-4-5 ±10kV surge - making it suitable for reinforced insulation in industrial and medical applications.
Does the MAX14931AASE+T support bidirectional communication?
No, the MAX14931AASE+T is a unidirectional isolator with fixed A→B channel direction (INAx → OUTBx). For bidirectional protocols like I²C, Analog Devices recommends the MAX14933 series. The MAX14931AASE+T's enable pins (ENA/ENB) control output drivers but do not reverse signal flow.
What are the supply voltage requirements for MAX14931AASE+T?
The MAX14931AASE+T requires two independent supplies: VDDA (1.71V–5.5V, referenced to GNDA) and VDDB (1.71V–5.5V, referenced to GNDB). Each supply has an undervoltage lockout threshold of 1.58V (typ), ensuring reliable operation across mixed-voltage systems such as 1.8V MCU ↔ 3.3V sensor interfaces.
How does the MAX14931AASE+T handle power loss on the input side?
The MAX14931AASE+T features a default-low output configuration: when INA1–INA4 are unpowered or floating, OUTB1–OUTB4 drive low. This fail-safe behavior prevents undefined logic states during power sequencing or brownout conditions - critical for safe shutdown in industrial control systems.
Is the MAX14931AASE+T pin-compatible with other devices in the MAX14930–MAX14932 family?
Yes, all MAX14930–MAX14932 variants share identical 16-pin wide SOIC pinouts and functional pin assignments. Differences lie in data rate (1/25/150Mbps), channel direction (A→B, B→A, or bidirectional), and default output state (high/low) - allowing drop-in replacement within the same speed and configuration group.
MAX14931AASE+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
MAX14931AASE+T FAQ
1.How can I place an order for MAX14931AASE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931AASE+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 MAX14931AASE+T reliable?
The price and inventory of MAX14931AASE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931AASE+T is usually 5 days.
3.What payment methods are accepted for MAX14931AASE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931AASE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931AASE+T?
MAX14931AASE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931AASE+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 MAX14931AASE+T?
For technical support, including MAX14931AASE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931AASE+T requirements.
6.How does Aetrix verify that MAX14931AASE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931AASE+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 MAX14931AASE+T meets industry standards.
7.What is the process for return or replacement of MAX14931AASE+T?
All MAX14931AASE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931AASE+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 MAX14931AASE+T part is unused and in its original packaging.
Return procedure for MAX14931AASE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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