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Texas Instruments ISO7731FQDWRQ1
- Part No.:
- ISO7731FQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7731FQDWRQ1.pdf
- Description:
- DGTL ISO 5000VRMS 3CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,856
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Product details
Overview
ISO7731FQDWRQ1 from Texas Instruments is a high-speed, reinforced triple-channel digital isolator qualified for automotive applications (AEC-Q100 Grade 1, −40°C to +125°C), delivering 100 Mbps data rate, ±100 kV/μs CMTI, and 5000 VRMS isolation rating in DW-16 wide-SOIC package. It features two forward and one reverse-direction channel, 2.25–5.5 V dual-supply operation with level translation, and default-low output logic.
For engineers reviewing the ISO7731FQDWRQ1 datasheet, ISO7731FQDWRQ1 pinout, ISO7731FQDWRQ1 application, or ISO7731FQDWRQ1 equivalent, key selection criteria include reinforced insulation certification (VDE 0884-17, UL 1577), surge immunity (12.8 kV), functional safety documentation support, and compatibility with EV powertrain signal isolation requirements including BMS, traction inverters, and on-board chargers.
Technical Context
The ISO7731FQDWRQ1 implements triple-channel galvanic isolation using dual capacitive SiO2 barriers per channel, supporting asymmetric bidirectional signal flow (2 forward, 1 reverse). Its architecture includes independent enable pins (EN1, EN2) for high-impedance output control and UVLO protection with 2.25 V rising threshold and 100 mV hysteresis.
It achieves robust EMC performance via system-level ESD (±8 kV contact), EFT, and surge immunity, enabled by optimized chip layout and low emissions design. The device operates across 2.25–5.5 V on both input (VCCI/GNDI) and output (VCCO/GNDO) sides, enabling level-shifting between 2.5 V, 3.3 V, and 5 V domains without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 100 Mbps maximum - supports high-speed CAN FD, SPI, and PWM feedback loops in EV inverters |
| Isolation rating | 5000 VRMS (UL 1577) - enables reinforced insulation in 600 VRMS working voltage systems (e.g., traction inverter gate drives) |
| CMTI | ±100 kV/μs typical - prevents false triggering during fast dv/dt transients in motor drive environments |
| Supply range | 2.25 V to 5.5 V per side - allows direct interfacing with MCU I/O, ADC references, and isolated DC/DC outputs |
| Propagation delay | 11 ns typical (5 V) - ensures timing-critical feedback paths (e.g., current sensing in BMS) meet sub-20 ns latency budgets |
| Power consumption | 1.5 mA per channel at 1 Mbps - reduces thermal load in densely packed automotive ECUs |
| Ambient temperature | −40°C to +125°C - meets AEC-Q100 Grade 1 for under-hood and battery-pack mounting |
Pinout & Package
ISO7731FQDWRQ1 is housed in a 16-pin wide-SOIC (DW) package measuring 10.30 mm × 7.50 mm, with creepage/clearance >8 mm and reinforced insulation barrier certified to DIN EN IEC 60747-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA, INB, INC | Input signals (side 1) | Three logic inputs referenced to GND1/VCC1; INC connects to reverse-direction channel |
| OUTA, OUTB, OUTC | Output signals (side 2) | Corresponding isolated outputs referenced to GNDO/VCCO; OUTC is reverse-direction output |
| EN1, EN2 | Output enable controls | EN1 enables side-1 outputs (OUTA/B/C); EN2 enables side-2 outputs (not applicable - side-2 has no enable) |
| VCC1, GND1 | Input-side power | Supplies input logic and channel A/B/C input buffers; supports 2.25–5.5 V |
| VCC2, GND2 | Output-side power | Supplies output drivers and level-shifted outputs; independent of VCC1 for true isolation |
| NC (pins 6, 7, 11) | No-connect terminals | Internally unconnected; must remain floating or grounded per layout guidelines to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced isolation barrier | Double capacitive SiO2 dielectric with >30-year lifetime at 1500 VRMS working voltage - eliminates need for external creepage enhancement in PCB layout |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration - enables use in safety-critical BMS and inverter control without custom qualification effort |
| Robust EMC immunity | ±8 kV IEC 61000-4-2 contact ESD across barrier and system-level surge tolerance - reduces need for external TVS diodes in automotive harness interfaces |
| Configurable output default | Low-default logic ('F' suffix) - ensures fail-safe deactivation of downstream drivers (e.g., IGBT gates) during power loss |
| Wide supply translation | 2.25–5.5 V operation on both sides - permits direct connection between 3.3 V microcontrollers and 5 V analog front-ends without level shifters |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring and pack current sensing signals between high-voltage battery stack and low-voltage MCU domain. IC Role / Device Role / Timing Role: Triple-channel isolator providing galvanic separation for analog-to-digital converter (ADC) reference, current shunt amplifier output, and fault reporting lines. Use Value: Enables accurate 12-bit+ voltage measurement at up to 100 kHz sampling while maintaining 5000 VRMS isolation and <11 ns propagation delay for real-time overcurrent response. | Use Scenario: Transmitting PWM gate-drive signals and feedback from isolated current/voltage sensors in 400–800 V electric vehicle inverters. IC Role / Device Role / Timing Role: Forward-direction channels carry PWM commands to isolated gate drivers; reverse-direction channel returns desaturation fault signals to MCU. Use Value: Supports 100 Mbps switching with ±100 kV/μs CMTI to prevent false triggering during 5–10 kV/μs IGBT switching transients. |
| On-Board Charger (OBC) | DC/DC Converter Control |
Use Scenario: Isolating communication and control signals between primary-side controller (high-voltage AC/DC stage) and secondary-side controller (low-voltage DC/DC output stage). IC Role / Device Role / Timing Role: Two forward channels transmit digital control commands (e.g., voltage setpoint, enable); reverse channel returns status/fault flags. Use Value: Maintains signal integrity across 1500 VRMS working voltage barrier while supporting 1 Mbps CAN FD diagnostics and 100 Mbps SPI configuration updates. | Use Scenario: Providing isolated feedback for output voltage regulation and overtemperature protection in high-efficiency 48 V–12 V automotive DC/DC converters. IC Role / Device Role / Timing Role: Isolating analog error amplifier output and digital fault signals between secondary-side sensing circuitry and primary-side PWM controller. Use Value: Delivers <11 ns propagation delay and <1.5 mA/channel quiescent current - critical for maintaining tight voltage regulation (<±1%) and fast fault shutdown (<2 μs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7731FDWRQ1 | Same DW-16 package and pinout; identical electrical specs except default output state is low ('F') - matches ISO7731FQDWRQ1 functionality | No functional difference; 'Q' denotes tape-and-reel packaging, 'DWRQ1' suffix confirms automotive qualification | Select ISO7731FDWRQ1 only if reel packaging is not required; ISO7731FQDWRQ1 is the standard orderable part for production builds |
| ADUM3470ARSZ | Quad-channel, 50 Mbps max, 2500 VRMS isolation, integrated isolated DC/DC converter - lacks reinforced rating and automotive qualification | Suitable for non-automotive industrial power supplies where integrated bias power is preferred over external isolated supply | Choose ADUM3470ARSZ only when board space constraints justify trade-off of lower isolation rating and absence of AEC-Q100 qualification |
Compared with ISO7731FQDWRQ1, ISO7731FDWRQ1 offers identical performance in a different packaging format, while ADUM3470ARSZ provides integrated power but sacrifices automotive compliance, reinforced insulation, and 100 Mbps capability - making ISO7731FQDWRQ1 the sole qualified solution for ASIL-B traction inverter and BMS signal isolation.
Availability
ISO7731FQDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, and on-board chargers requiring stable component supply with full automotive qualification and long-term lifecycle support.
Supply support for ISO7731FQDWRQ1 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of expertise in isolation technology and functional safety design.
The ISO773x-Q1 product line was engineered specifically for high-reliability automotive powertrain and body electronics, emphasizing reinforced isolation, AEC-Q100 compliance, and system-level EMC robustness in harsh environments.
FAQ
What is the isolation rating and certification status of ISO7731FQDWRQ1?
ISO7731FQDWRQ1 is certified to 5000 VRMS per UL 1577 and reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17), with additional approvals including IEC 62368-1, IEC 61010-1, and GB 4943.1. It achieves 1500 VRMS working voltage and 12.8 kV surge capability in the DW-16 package, meeting ASIL-B requirements for automotive safety systems.
How does the channel directionality of ISO7731FQDWRQ1 differ from ISO7730FQDWRQ1?
ISO7731FQDWRQ1 implements two forward-direction channels (INA→OUTA, INB→OUTB) and one reverse-direction channel (INC←OUTC), whereas ISO7730FQDWRQ1 has all three channels unidirectional (forward only). This makes ISO7731FQDWRQ1 ideal for bidirectional communication links such as fault-reporting paths in inverter gate driver interfaces.
What are the supply voltage requirements and level-shifting capabilities of ISO7731FQDWRQ1?
ISO7731FQDWRQ1 supports independent 2.25–5.5 V supplies on both input (VCC1/GND1) and output (VCC2/GNDO) sides, enabling seamless level translation between 2.5 V, 3.3 V, and 5 V logic domains without external components. Its input thresholds scale with VCCI, ensuring reliable operation across mixed-voltage system architectures.
Does ISO7731FQDWRQ1 support functional safety development for ISO 26262 systems?
Yes, ISO7731FQDWRQ1 is functional safety-capable with documentation available to aid ISO 26262 system design, including failure mode analysis, FIT rate data, and diagnostic coverage guidance. It is widely deployed in ASIL-B compliant BMS and inverter control units where hardware-level fault detection and safe state management are required.
What is the meaning of the 'F' and 'Q' in ISO7731FQDWRQ1?
The 'F' suffix indicates low-default output logic (outputs go low upon input power loss), critical for fail-safe gate driver disablement. The 'Q' denotes automotive qualification per AEC-Q100, and 'DWRQ1' specifies the 16-pin wide-SOIC (DW) package with tape-and-reel (Q) packaging and automotive (Q1) grade - confirming full production readiness for automotive applications.
ISO7731FQDWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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:
- 3
- Inputs - Side 1/Side 2:
- 2/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 85kV/µs
- Data Rate:
- 100Mbps
- Propagation Delay tpLH / tpHL (Max):
- 16ns, 16ns
- Pulse Width Distortion (Max):
- 4.9ns
- Rise / Fall Time (Typ):
- 1.3ns, 1.4ns
- Voltage - Supply:
- 2.25V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ISO7731FQDWRQ1 FAQ
1.How can I place an order for ISO7731FQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7731FQDWRQ1 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 ISO7731FQDWRQ1 reliable?
The price and inventory of ISO7731FQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7731FQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7731FQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7731FQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7731FQDWRQ1?
ISO7731FQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7731FQDWRQ1 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 ISO7731FQDWRQ1?
For technical support, including ISO7731FQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7731FQDWRQ1 requirements.
6.How does Aetrix verify that ISO7731FQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7731FQDWRQ1 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 ISO7731FQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7731FQDWRQ1?
All ISO7731FQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7731FQDWRQ1, 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 ISO7731FQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7731FQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7731FQDWRQ1 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
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ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
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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