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Texas Instruments ISO7721FQDWRQ1
- Part No.:
- ISO7721FQDWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ISO7721FQDWRQ1.pdf
- Description:
- DGTL ISO 5000VRMS 2CH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,973
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Product details
Overview
ISO7721FQDWRQ1 from Texas Instruments is a reinforced dual-channel digital isolator for automotive systems, featuring 100 Mbps data rate, ±100 kV/μs typical CMTI, 5000 VRMS isolation rating (DW package), and default-low output logic. It enables signal integrity in high-noise traction inverters and battery management systems under AEC-Q100 Grade 1 conditions (–40°C to +125°C).
For engineers reviewing the ISO7721FQDWRQ1 datasheet, ISO7721FQDWRQ1 pinout, ISO7721FQDWRQ1 application, or ISO7721FQDWRQ1 equivalent, this page delivers verified functional safety documentation support, VDE-reinforced insulation compliance, channel directionality confirmation (opposite-direction channels), and DW-16 SOIC package-specific thermal and safety limiting values.
Technical Context
The ISO7721FQDWRQ1 implements dual capacitive SiO₂ isolation barriers with opposite-direction channel configuration (INA→OUTA, INB←OUTB), enabling bidirectional signal routing across isolated domains without external inversion logic. Its architecture supports independent 2.25–5.5 V supplies per side and integrates UVLO with 100–200 mV hysteresis.
It achieves system-level EMC robustness via intrinsic ±8 kV IEC 61000-4-2 contact discharge protection across the barrier, low emissions design, and >30-year projected lifetime at 1.5 kVRMS working voltage-validated per DIN EN IEC 60747-17 (VDE 0884-17) and UL 1577.
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 powertrain control |
| Isolation Rating | 5000 VRMS (UL 1577) - qualifies for reinforced insulation in 600 VRMS working voltage systems (e.g., on-board chargers) |
| CMTI | ±100 kV/μs typical - prevents false triggering during fast transients in motor drive gate drivers |
| Supply Range | 2.25 V to 5.5 V per side - enables direct interface with 3.3 V microcontrollers and 5 V analog front-ends |
| Propagation Delay | 11 ns typical - ensures timing-critical feedback paths (e.g., current sensing in traction inverters) meet <25 ns latency budgets |
| Ambient Temp Range | –40°C to +125°C - meets AEC-Q100 Grade 1 for under-hood automotive applications |
| Default Output State | Low (F-suffix) - failsafe behavior for shutdown signaling in BMS fault detection circuits |
Pinout & Package
ISO7721FQDWRQ1 uses the Wide-SOIC-16 (DW) package (10.30 mm × 7.50 mm), optimized for creepage/clearance compliance in high-voltage automotive PCB layouts. The double-capacitor isolation barrier separates input and output sides electrically and thermally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 16 | GND1 | Input-side ground reference - must be routed separately from GND2 to maintain isolation integrity |
| 9 | GND2 | Output-side ground reference - forms return path for VCC2-supplied logic and isolated peripherals |
| 4, 13 | INA / OUTA | Channel A input/output - opposite-direction pairing enables unidirectional signal flow from MCU to gate driver |
| 5, 12 | INB / OUTB | Channel B input/output - reverse direction allows feedback signal (e.g., current sense) from high-side domain to low-side controller |
| 3, 14 | VCC1 / VCC2 | Independent input/output supplies - permits level translation between 3.3 V MCU and 5 V isolated ADC or driver IC |
| 2, 6, 8, 10, 11, 15 | NC | No-connect pins - must remain unconnected per TI layout guidelines to avoid coupling or EMI degradation |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Certification | VDE 0884-17, UL 1577, IEC 62368-1 - enables single-component isolation in 2-MOPP medical-grade or 600 VRMS industrial systems |
| Functional Safety Documentation | ISO7721-Q1-specific FIT rate, failure mode analysis, and diagnostic coverage reports - accelerates ISO 26262 ASIL-B system certification |
| Surge Immunity | 12.8 kV peak surge (IEC 62368-1) - withstands lightning-induced transients in DC/DC converter inputs without external TVS |
| Low Power at 1 Mbps | 1.7 mA per channel typical - reduces thermal load in sealed battery enclosures where forced cooling is unavailable |
| EMC Immunity | ±8 kV IEC 61000-4-2 contact discharge across barrier - eliminates need for secondary board-level ESD protection on isolated interfaces |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring ADCs and pack contactor control signals in 800-V EV battery packs. IC Role / Device Role / Timing Role: Dual-channel isolator providing reinforced separation between high-voltage battery domain and low-voltage MCU domain, with channel A transmitting ADC data and channel B relaying contactor status. Use Value: Enables safe, accurate SOC estimation under EMI-rich conditions while meeting ASIL-D fault tolerance requirements via certified failure modes. |
Use Scenario: Transmitting PWM gate drive signals and current feedback from shunt amplifiers in 3-phase motor inverters. IC Role / Device Role / Timing Role: Opposite-direction channels deliver time-aligned gate commands (INA→OUTA) and fast overcurrent feedback (OUTB←INB) across isolation barrier. Use Value: 11 ns propagation delay and ±100 kV/μs CMTI ensure precise dead-time control and prevent shoot-through during high-dV/dt switching events. |
| On-Board Charger (OBC) | DC/DC Converter Monitoring |
Use Scenario: Isolating digital control signals between primary-side LLC controller and secondary-side 12-V output regulation circuitry. IC Role / Device Role / Timing Role: Level-translating isolator interfacing 5-V primary-side MCU with 3.3-V secondary-side supervisor IC, maintaining timing alignment across 400-V isolation barrier. Use Value: 2.25–5.5 V dual-supply operation eliminates level-shifters; 5000 VRMS rating supports OBC's 600 VRMS working voltage requirement. |
Use Scenario: Monitoring isolated output voltage and current in high-efficiency 48-V to 12-V bidirectional DC/DC converters for vehicle networks. IC Role / Device Role / Timing Role: Dual-channel isolator conveying ADC readings and fault flags from isolated sensing domain to main vehicle controller, with F-suffix ensuring fail-safe low output on power loss. Use Value: Default-low output state prevents erroneous activation of safety relays during brownout conditions in 48-V architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8621ED-B-IS | 3.75 kVRMS isolation rating (UL), 150 Mbps data rate, 25 kV/μs CMTI, SOIC-8 package | Lacks AEC-Q100 qualification and functional safety documentation; rated only for industrial temp range (–40°C to +105°C) | Select when cost-sensitive non-automotive designs require higher speed but lower isolation strength and no ASIL support |
| ADUM121N1BRZ-RL7 | 3000 VRMS isolation (UL), 150 Mbps, 100 kV/μs CMTI, SOIC-8, default-high output (no F-suffix variant) | Not AEC-Q100 qualified; lacks VDE reinforcement and automotive safety certifications; no default-low option | Choose for space-constrained industrial PLC I/O modules needing high speed and CMTI, but not automotive reliability or fail-safe defaults |
Compared with SI8621ED-B-IS and ADUM121N1BRZ-RL7, ISO7721FQDWRQ1 uniquely delivers AEC-Q100 Grade 1 operation, VDE-reinforced 5000 VRMS isolation, functional safety documentation, and automotive-qualified default-low output - making it the only drop-in solution for ISO 26262-compliant EV powertrain subsystems requiring certified fail-safe behavior.
Availability
ISO7721FQDWRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and DC/DC converters requiring stable component supply across automotive production lifecycles.
Supply support for ISO7721FQDWRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade isolation, power management, and real-time control ICs.
The ISO772x-Q1 family was designed specifically for high-reliability automotive powertrain and charging systems, emphasizing reinforced isolation, functional safety readiness, and robust EMC performance in harsh EMI environments.
FAQ
What is the isolation rating and certification status of ISO7721FQDWRQ1?
ISO7721FQDWRQ1 has a 5000 VRMS isolation rating per UL 1577 and is certified for reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17), IEC 62368-1, IEC 61010-1, and GB 4943.1. It carries TUV and CQC certifications for DW-16 package, supporting 600 VRMS working voltage in automotive applications.
How does the F-suffix affect the output behavior of ISO7721FQDWRQ1?
The F-suffix in ISO7721FQDWRQ1 denotes default-low output logic: when input power or signal is lost, both outputs (OUTA and OUTB) assert low. This fail-safe behavior is critical in automotive safety systems such as BMS contactor control, where unintended high-state signals could cause hazardous energy release.
Does ISO7721FQDWRQ1 support level translation between different supply voltages?
Yes, ISO7721FQDWRQ1 supports independent 2.25 V to 5.5 V supplies on VCC1 (input side) and VCC2 (output side), enabling seamless level translation - for example, interfacing a 3.3 V MCU with a 5 V isolated ADC or gate driver without external level shifters.
What is the common-mode transient immunity (CMTI) specification for ISO7721FQDWRQ1?
ISO7721FQDWRQ1 delivers ±100 kV/μs typical common-mode transient immunity, measured per IEC 61000-4-4 with 1200 V step input. This high CMTI prevents data corruption during fast-switching events in traction inverters and ensures reliable communication across noisy high-voltage domains.
Which package type is used by ISO7721FQDWRQ1, and what are its key mechanical dimensions?
ISO7721FQDWRQ1 uses the Wide-SOIC-16 (DW) package with nominal body size 10.30 mm × 7.50 mm. This package provides 8 mm creepage and clearance per IEC 60664-1, supporting reinforced insulation up to 600 VRMS working voltage in automotive PCB layouts.
ISO7721FQDWRQ1 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:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- 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):
- 3.9ns, 3.9ns
- 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
ISO7721FQDWRQ1 FAQ
1.How can I place an order for ISO7721FQDWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7721FQDWRQ1 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 ISO7721FQDWRQ1 reliable?
The price and inventory of ISO7721FQDWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7721FQDWRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7721FQDWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7721FQDWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7721FQDWRQ1?
ISO7721FQDWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7721FQDWRQ1 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 ISO7721FQDWRQ1?
For technical support, including ISO7721FQDWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7721FQDWRQ1 requirements.
6.How does Aetrix verify that ISO7721FQDWRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7721FQDWRQ1 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 ISO7721FQDWRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7721FQDWRQ1?
All ISO7721FQDWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7721FQDWRQ1, 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 ISO7721FQDWRQ1 part is unused and in its original packaging.
Return procedure for ISO7721FQDWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7721FQDWRQ1 Tags
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