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Analog Devices Inc./Maxim Integrated MAX14931DASE+T
- Part No.:
- MAX14931DASE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931DASE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,504
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Product details
Overview
MAX14931DASE+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 6.67ns minimum pulse width, 25kV/µs common-mode transient immunity, 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 MAX14931DASE+T datasheet, MAX14931DASE+T pinout, MAX14931DASE+T application, or MAX14931DASE+T equivalent, this page delivers verified channel configuration (3 forward + 1 reverse), default-low output state, wide-body SOIC-16 package details, safety certifications (UL, VDE, cUL), and design-critical timing specs including 5.1ns typical propagation delay and <1ps pulse-width distortion at 5V.
Technical Context
The MAX14931DASE+T implements capacitive isolation with proprietary silicon-dioxide dielectric barriers, supporting asymmetric bidirectional signal flow: three channels isolate A-side inputs to B-side outputs (INA→OUTB), while one channel isolates B-side inputs to A-side outputs (INB→OUTA). Its architecture enables native SPI bus isolation without external direction control logic.
It integrates undervoltage lockout (1.58V threshold) on both sides, supports level translation between 1.71V and 5.5V domains, and maintains guaranteed timing performance across full temperature range (–40°C to +125°C) with no derating - critical for real-time control loops in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS continuous working voltage - meets IEC 60950-1 and IEC 61010-1 basic insulation requirements |
| Data Rate | 150Mbps maximum - supports high-speed serial interfaces like isolated CAN FD physical layer or fast SPI ADC readouts |
| Propagation Delay | 5.1ns typical (tPLH/tPHL at 5V) - enables sub-10ns timing-critical feedback paths in digital power converters |
| CMTI | 25kV/µs minimum - ensures reliable operation in noisy motor drive inverters with fast-switching SiC/GaN FETs |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with 1.8V microcontrollers and 3.3V/5V peripherals without level shifters |
| Channel Configuration | 3 forward (A→B), 1 reverse (B→A) - matches standard 4-wire SPI topology (SCLK/MOSI/MISO/SS) |
| Default Output State | Low - prevents floating states during power-up/power-down sequences in safety-critical systems |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), creepage/clearance ≥8mm, RoHS-compliant, JEDEC MS-013AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (INA1–INA4) | A-side digital inputs | Accept 1.71V–5.5V logic; 0.7×VDDA high-threshold enables compatibility with diverse MCU I/O standards |
| 5 (GNDA) | A-side ground reference | Isolated return path for side-A circuitry; must not be connected to GNDB |
| 6 (VDDA) | A-side supply input | Power domain for input-side logic; UVLO triggers below 1.45V to prevent metastability |
| 7–10 (OUTB1–OUTB4) | B-side digital outputs | Drive 4mA loads at VDDB–0.4V; support 150Mbps toggling with 2ns rise/fall times |
| 11 (GNDB) | B-side ground reference | Isolated return path for side-B circuitry; forms galvanic barrier with GNDA |
| 12 (VDDB) | B-side supply input | Power domain for output-side logic; independent of VDDA enables level translation |
| 13–16 (INB1–INB4) | B-side digital inputs | Enable reverse-direction signaling (e.g., MISO in SPI); identical VIH/VIL specs as INA pins |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | 2.75kVRMS rating with 630VPK repetitive peak voltage - exceeds reinforced insulation requirements for functional safety |
| Ultra-low propagation skew | 0.9ns channel-to-channel skew (same direction) - preserves timing integrity in parallel data buses |
| Integrated enable control | ENA/ENB pins place outputs in high-impedance state - enables shared-bus architectures without external tri-state logic |
| Low-power high-speed operation | 14.2mA typical supply current at 150Mbps/3.3V (side B) - reduces thermal load in dense PCB layouts |
| Robust ESD protection | ±4kV HBM on all pins - eliminates need for external TVS diodes in most industrial enclosures |
Applications
| Industrial Motor Drives | SPI-Isolated Data Acquisition |
|---|---|
Use Scenario: Isolating gate driver control signals and current-sense feedback in 3-phase inverter stacks using SiC MOSFETs. IC Role / Device Role / Timing Role: Provides 150Mbps isolated communication between MCU and isolated ADCs/gate drivers while rejecting >25kV/µs transients from switching nodes. Use Value: Enables precise PWM timing synchronization across isolation barrier with <1ns pulse-width distortion, preventing shoot-through faults. | Use Scenario: Connecting isolated SAR ADCs (e.g., AD7606) to host FPGA via SPI in high-voltage energy metering systems. IC Role / Device Role / Timing Role: Translates 1.8V FPGA SPI signals to 5V ADC interface while maintaining 4-wire SPI timing integrity across 2.75kVRMS barrier. Use Value: Eliminates level-shifter ICs and reduces BOM count by integrating bidirectional channel asymmetry (3A→B + 1B→A) matching SPI protocol. |
| Automotive Battery Management | Medical Patient Monitoring |
Use Scenario: Isolating cell voltage monitoring ICs (e.g., LTC6813) from main BMS controller in 800V EV battery packs. IC Role / Device Role / Timing Role: Transfers precision analog measurement data over isolated SPI while surviving 125°C ambient and 10kV surge events per IEC 61000-4-5. Use Value: Meets ASIL-B functional safety requirements via VDE 0884-11 certified basic insulation and 150-year lifetime barrier reliability modeling. | Use Scenario: Isolating ECG front-end analog signal chains from digital processing unit in Class II medical devices. IC Role / Device Role / Timing Role: Provides 2.75kVRMS patient-side isolation for digital control lines while meeting IEC 60601-1 443VRMS working voltage limits. Use Value: Achieves 630VPK transient immunity and <2pF barrier capacitance - minimizing leakage current (<10µA) for patient safety compliance. |
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 outputs, QSOP-16 package (smaller footprint) | Lacks reverse-direction channel; requires external pull-down for default-low behavior | Select when board space is constrained and unidirectional-only operation suffices |
| ISO6741FDWR | 4-channel, 5kVRMS, 50Mbps, 16-pin SOIC, default-low, lower CMTI (10kV/µs) | Higher isolation rating but slower speed; optimized for cost-sensitive industrial PLC I/O modules | Select when 5kVRMS system-level certification is mandatory and 150Mbps is unnecessary |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931DASE+T uniquely combines 2.75kVRMS isolation, 150Mbps speed, integrated reverse channel, and default-low outputs in a wide-body SOIC - making it optimal for high-fidelity SPI isolation where timing integrity and fail-safe startup behavior are non-negotiable.
Availability
MAX14931DASE+T is available at Aetrix Electronics and suitable for industrial motor drives, battery management systems, and medical patient monitors requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX14931DASE+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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX1493x family was designed specifically for high-reliability multichannel isolation in harsh environments - emphasizing low propagation skew, high CMTI, and extended temperature operation up to +125°C.
FAQ
What is the maximum data rate supported by the MAX14931DASE+T?
The MAX14931DASE+T supports a maximum data rate of 150Mbps under specified conditions (VDDA/VDDB = 4.5V–5.5V, CL = 15pF, TA = –40°C to +125°C). This is confirmed in the Dynamic Electrical Characteristics table for MAX1493_B/E variants, where DRMAX = 150Mbps is explicitly listed with 6.67ns minimum pulse width and 5.1ns typical propagation delay.
Does the MAX14931DASE+T support level translation between different voltage domains?
Yes, the MAX14931DASE+T supports level translation via independent 1.71V–5.5V supplies on each side (VDDA and VDDB). Input thresholds scale with respective supply voltages (VIH = 0.7×VDD_, VIL = 0.8V), allowing seamless interfacing between 1.8V microcontrollers and 5V peripherals without external level shifters - a key feature validated in the DC Electrical Characteristics section.
What safety certifications does the MAX14931DASE+T hold?
The MAX14931DASE+T is certified to UL 1577 (3750VRMS), cUL (CSA 5A), VDE 0884-11:2017 (Basic Insulation), TUV, and IEC 60950-1/61010-1/60601-1. These are documented in the Safety Regulatory Approvals section, with file references (e.g., E351759 for UL/cUL, 5015017-4880-0001 for VDE) and rated working voltage of 443VRMS continuous.
How many channels operate in each direction on the MAX14931DASE+T?
The MAX14931DASE+T has three channels configured A→B (INA1–INA3 to OUTB1–OUTB3) and one channel configured B→A (INB1 to OUTA1), as defined in the Functional Diagram and Product Selector Guide. This 3+1 asymmetric configuration is explicitly assigned to the MAX14931 variant within the MAX14930–MAX14932 family.
What is the default output state of the MAX14931DASE+T during power-up?
The MAX14931DASE+T has a default-low output state, meaning all outputs (OUTA1, OUTB1–OUTB4) drive low when their respective inputs are unpowered or floating. This is confirmed by the Ordering Information suffix "D" (denoting default-low) and verified in the General Description: "Each device is also available in either a default high or default low configuration."
MAX14931DASE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm 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
MAX14931DASE+T FAQ
1.How can I place an order for MAX14931DASE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931DASE+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 MAX14931DASE+T reliable?
The price and inventory of MAX14931DASE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931DASE+T is usually 5 days.
3.What payment methods are accepted for MAX14931DASE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931DASE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931DASE+T?
MAX14931DASE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931DASE+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 MAX14931DASE+T?
For technical support, including MAX14931DASE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931DASE+T requirements.
6.How does Aetrix verify that MAX14931DASE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931DASE+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 MAX14931DASE+T meets industry standards.
7.What is the process for return or replacement of MAX14931DASE+T?
All MAX14931DASE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931DASE+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 MAX14931DASE+T part is unused and in its original packaging.
Return procedure for MAX14931DASE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931DASE+T Tags
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ISO1212DBQR
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ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO7721FDR
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SI8710CC-B-ISR
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ISO6741FQDWRQ1
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ISO7721DWVR
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ISO7762FDBQR
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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