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Analog Devices Inc./Maxim Integrated MAX14931CASE+T
- Part No.:
- MAX14931CASE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931CASE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,843
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Product details
Overview
MAX14931CASE+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. It features default-low output configuration, 6.67ns minimum pulse width, and operates across –40°C to +125°C ambient for industrial fieldbus and isolated SPI/RS-485 interfaces.
For engineers reviewing the MAX14931CASE+T datasheet, MAX14931CASE+T pinout, MAX14931CASE+T application, or MAX14931CASE+T equivalent, this device delivers high-speed, low-jitter isolation with VDE-certified basic insulation, robust CMTI (25kV/µs), and compatibility with microcontrollers and FPGAs requiring level translation and safety-rated signal separation.
Technical Context
The MAX14931CASE+T implements capacitive isolation with proprietary dielectric barrier technology, supporting unidirectional channel mapping (A→B only) and integrated enable control per side. Its architecture enables precise timing control with <1ns pulse-width distortion at 150Mbps and sub-8ns propagation delay (tPLH/tPHL) under 3.3V supply.
It complies with DIN VDE V 0884-11:2017-01 for basic insulation, supports 443VRMS continuous working voltage (VIOWM), and withstands ±10kV surge per IEC 61000-4-5. The device uses differential input thresholds with 410mV hysteresis to reject noise in high-noise industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS for 60s (UL/VDE certified); enables safety-critical barrier compliance in industrial and medical systems |
| Data Rate | 150Mbps maximum; supports high-throughput serial protocols like isolated SPI clock domains and fast RS-485 transceiver control |
| Propagation Delay | 5.1ns (tPLH typ) at 5V; ensures tight timing budgets in real-time control loops and synchronous data acquisition |
| CMTI | 25kV/µs minimum; prevents false triggering during rapid common-mode transients in motor drives and power converters |
| Supply Range | 1.71V–5.5V per side; allows direct interfacing with 1.8V logic, 3.3V microcontrollers, and 5V legacy peripherals without level shifters |
| Operating Temp | –40°C to +125°C ambient; qualified for under-hood automotive, factory-floor PLCs, and battery management systems |
| Output Default | Low-state on power loss or input float; ensures fail-safe behavior in safety-critical enable/disable paths |
Pinout & Package
MAX14931CASE+T is housed in a 16-pin wide-body SOIC package (10.3mm × 7.5mm, creepage/clearance = 8mm), optimized for high-voltage isolation integrity and thermal dissipation in industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side digital inputs | Accept CMOS/LVTTL signals referenced to GNDA; 0.7×VDDA threshold ensures reliable logic detection across supply range |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive 4mA loads with VOH ≥ VDDB–0.4V; compatible with standard logic families on isolated domain |
| ENA | Primary-side output enable | Active-high control for all OUTA outputs; enables power-gating of isolated side when not in use |
| ENB | Secondary-side output enable | Active-high control for all OUTB outputs; supports dynamic channel shutdown to reduce system-level power |
| VDDA / GNDA | Primary-side power pair | Supplies input logic and internal isolation driver; decoupling required within 10mm of pins per layout guidelines |
| VDDB / GNDB | Secondary-side power pair | Supplies output drivers and receiver circuitry; galvanically separated to prevent ground loop coupling |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Isolation Barrier | 2.75kVRMS rated, 630VPK repetitive peak, and 4600VPK transient withstand - meets IEC 60747-5-5 for reinforced insulation systems |
| Ultra-Low Propagation Skew | 0.9ns channel-to-channel skew (same direction) at 5V - enables deterministic timing in multi-bit parallel isolation (e.g., isolated ADC data buses) |
| High-Speed Low-Jitter Operation | 140ps peak eye diagram jitter at 5V - preserves signal integrity for 150Mbps NRZ data without retiming |
| Robust ESD Protection | ±4kV HBM on all pins - eliminates need for external TVS diodes in board-level ESD protection schemes |
| Fail-Safe Output State | Outputs default to logic low when input is unpowered or floating - prevents undefined states in safety-critical enable lines |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes exposed to 2kV common-mode surges and 100V/m EMI. IC Role / Device Role / Timing Role: Digital isolator bridging controller UART and transceiver logic, providing galvanic separation while maintaining 25Mbps signaling. Use Value: Enables 8mm creepage compliance and 25kV/µs CMTI immunity - eliminating ground-loop errors and protecting MCU I/O from bus faults. |
Use Scenario: Isolating SPI clock, MOSI, MISO, and CS between an ARM Cortex-M7 host and isolated ADC/DAC in a 16-bit precision measurement module. IC Role / Device Role / Timing Role: Four-channel unidirectional isolator with matched propagation delays (<1ns skew) preserving SPI timing margins at 50MHz SCLK. Use Value: Supports full-duplex 150Mbps operation with <8ns tPLH - enabling real-time sensor data streaming without added latency or re-timing logic. |
| Battery Management Systems | Medical Sensor Interfaces |
|
Use Scenario: Isolating cell monitor IC communication (e.g., LTC6813) from main BMS controller in 800V EV traction battery packs. IC Role / Device Role / Timing Role: High-voltage barrier for UART-based daisy-chain telemetry, operating at –40°C to +105°C with 2.75kVRMS withstand rating. Use Value: Meets IEC 61010-1 ed.3 basic insulation requirements (443VRMS working voltage) - ensuring patient/operator safety and regulatory certification readiness. |
Use Scenario: Isolating analog front-end sensor data paths (ECG, EEG) from digital processing unit in Class II medical devices with double-insulation requirements. IC Role / Device Role / Timing Role: Signal isolator for digital control lines (reset, sync, config) between isolated analog domain and host processor. Use Value: VDE-certified basic insulation (DIN VDE V 0884-11) and 630VPK repetitive peak rating - satisfies MOOP (1x) safety requirement per IEC 60601-1. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6741QDWR | 4-channel, 5000VRMS, 50Mbps max, 3.3V-only supply, no enable pins | Higher isolation but lower speed; suited for HV gate drivers where bandwidth <50Mbps suffices | Select when VIOTM > 4600VPK is required and data rate ≤50Mbps; avoid for 150Mbps SPI or fast fieldbus |
| ADUM3401ARWZ | 4-channel, 2500VRMS, 1Mbps max, 3.0–5.5V supply, default-high outputs | Lower isolation and speed; designed for cost-sensitive industrial I/O modules | Choose for legacy 1Mbps RS-485 or slow digital I/O where 2.75kVRMS and 150Mbps are unnecessary |
Compared with ISO6741QDWR and ADUM3401ARWZ, the MAX14931CASE+T uniquely balances 150Mbps speed, 2.75kVRMS isolation, and dual-supply flexibility - making it optimal for next-generation isolated high-speed serial interfaces where timing precision and safety coexist.
Availability
MAX14931CASE+T is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical sensor interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX14931CASE+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 engineered for high-speed, safety-certified digital isolation in harsh environments - targeting fieldbus, motor control, and energy infrastructure applications demanding reliability at extended temperature ranges.
FAQ
What is the maximum data rate supported by the MAX14931CASE+T?
The MAX14931CASE+T supports a maximum data rate of 150Mbps, verified across its full 1.71V–5.5V supply range and –40°C to +125°C operating temperature. This performance is achieved with <1ns pulse-width distortion and 5.1ns typical propagation delay (tPLH) at 5V, making it suitable for high-speed isolated SPI, fast RS-485 control, and time-critical digital interfaces where timing integrity is essential.
Does the MAX14931CASE+T support different supply voltages on each side?
Yes, the MAX14931CASE+T supports independent 1.71V–5.5V supplies on both sides (VDDA/GNDA and VDDB/GNDB). This dual-supply capability enables seamless level translation between 1.8V microcontrollers and 3.3V or 5V peripherals without external level shifters - a key advantage in mixed-voltage industrial and automotive systems where domain isolation and voltage compatibility are critical.
What safety certifications does the MAX14931CASE+T hold?
The MAX14931CASE+T is certified to UL1577 (3750VRMS), cUL (CSA 5A), and DIN VDE V 0884-11:2017-01 for basic insulation. It achieves 2.75kVRMS withstand voltage (60s), 443VRMS working voltage (VIOWM), and 630VPK repetitive peak isolation (VIORM), meeting IEC 61010-1 and IEC 60601-1 requirements for industrial and medical equipment with one means of patient protection (1 MOOP).
How does the MAX14931CASE+T handle power-loss conditions on the input side?
The MAX14931CASE+T features a default-low output configuration: when INA inputs are unpowered or floating, OUTB outputs transition to and hold logic-low state. This fail-safe behavior prevents undefined control signals in safety-critical applications such as isolated enable lines for power stages or fault-clear circuits - ensuring predictable system response during brownouts or initialization sequences.
What is the common-mode transient immunity (CMTI) specification for the MAX14931CASE+T?
The MAX14931CASE+T guarantees a minimum CMTI of 25kV/µs, measured per IEC 60747-5-5 with 1000V common-mode step applied between GNDA and GNDB. This high immunity ensures reliable operation in electrically noisy environments - such as motor drives, inverters, and industrial power supplies - where rapid ground potential shifts would otherwise cause data corruption or spurious output transitions.
MAX14931CASE+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:
- 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
MAX14931CASE+T FAQ
1.How can I place an order for MAX14931CASE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931CASE+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 MAX14931CASE+T reliable?
The price and inventory of MAX14931CASE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931CASE+T is usually 5 days.
3.What payment methods are accepted for MAX14931CASE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931CASE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931CASE+T?
MAX14931CASE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931CASE+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 MAX14931CASE+T?
For technical support, including MAX14931CASE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931CASE+T requirements.
6.How does Aetrix verify that MAX14931CASE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931CASE+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 MAX14931CASE+T meets industry standards.
7.What is the process for return or replacement of MAX14931CASE+T?
All MAX14931CASE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931CASE+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 MAX14931CASE+T part is unused and in its original packaging.
Return procedure for MAX14931CASE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931CASE+T Tags
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