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Texas Instruments ISO7041QDBQRQ1
- Part No.:
- ISO7041QDBQRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ISO7041QDBQRQ1.pdf
- Description:
- AUTOMOTIVE, 120-UA, ULTRA-LOW PO
- Quantity:
- Payment:
- Shipping:
Inventory:3,086
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Product details
Overview
ISO7041QDBQRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade, ultra-low-power four-channel digital isolator with capacitive SiO₂ isolation barrier, 3000 VRMS rating, 4 Mbps signaling rate, and default-high output logic state-designed for battery management systems and traction inverter signal conditioning in EV/HEV powertrain applications.
For engineers reviewing the ISO7041QDBQRQ1 datasheet, ISO7041QDBQRQ1 pinout, ISO7041QDBQRQ1 application, or ISO7041QDBQRQ1 equivalent, this page delivers verified functional safety–capable parameters, QSOP-16 package mapping, channel directionality (3 forward / 1 reverse), quiescent current (3.5 μA/channel @ 3.3 V), and CMTI (±100 kV/μs typical) to support high-reliability automotive isolation design.
Technical Context
The ISO7041QDBQRQ1 implements edge-based encoding with ON-OFF keying (OOK) modulation across a double-capacitive silicon dioxide barrier, enabling <120 μA/Mbps dynamic current consumption while maintaining 3000 VRMS isolation per UL 1577. Its architecture includes integrated refresh logic with watchdog timer (100 μs timeout) to enforce DC input-output state matching.
It supports asymmetric supply operation (VCC1 = 3.0–5.5 V, VCC2 = 3.0–5.5 V), features ±8 kV IEC 61000-4-2 contact ESD protection across the barrier, and achieves >100-year projected isolation lifetime under rated stress conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS - meets UL 1577 and VDA320 requirements for automotive high-voltage system separation |
| Quiescent Current | 3.5 μA per channel @ 3.3 V - enables always-on monitoring in thermally constrained BMS modules |
| Max Data Rate | 4 Mbps - supports fast UART, SPI, and PWM feedback loops in inverter gate driver interfaces |
| CMTI | ±100 kV/μs typical - ensures robust operation during high dv/dt transients in traction inverters |
| Operating Temp | –40°C to +125°C ambient - qualified for AEC-Q100 Grade 1 automotive under-hood environments |
| Channel Direction | 3 forward, 1 reverse - enables bidirectional control and status reporting in isolated DC/DC converters |
| Default Output | High - maintains safe logic state during input loss in critical motor control enable paths |
Pinout & Package
ISO7041QDBQRQ1 is housed in a 16-pin QSOP (DBQ) package measuring 4.90 mm × 3.90 mm, with creepage and clearance >3.7 mm, DTI = 17 µm, and material group I per IEC 60664-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Supply (Side 1) | Input-side power rail (3.0–5.5 V); powers INA, INB, INC, IND and associated logic |
| VCC2 | Supply (Side 2) | Output-side power rail (3.0–5.5 V); powers OUTA–OUTD and receiver circuitry |
| GND1 (Pins 2,7,8) | Reference (Side 1) | Common return for VCC1 and all input channels; requires low-impedance local decoupling |
| GND2 (Pins 9,10,15) | Reference (Side 2) | Common return for VCC2 and all output channels; galvanically isolated from GND1 |
| INA–IND | Digital Inputs | CMOS/LVCMOS-compatible inputs; 300-Ω series resistor recommended for ESD robustness |
| OUTA–OUTD | Digital Outputs | Push-pull outputs with ±2 mA (3.3 V) or ±4 mA (5 V) drive; default-high on power loss |
Key Features
| Feature | Design Value |
|---|---|
| Functional Safety Support | Documentation available for ISO 26262 ASIL-B system-level integration; no hardware safety mechanisms embedded |
| Refresh Logic | Internal watchdog enforces DC output state match to input every 100 μs-critical for fault detection in safety-critical paths |
| EMC Robustness | ±8 kV IEC 61000-4-2 contact ESD across barrier; meets CISPR 22 Class B emissions without shielding |
| Thermal Lifetime | >100-year projected isolation barrier life at 125°C ambient-validated per TDDB testing per DIN VDE 0884-11 |
| Supply Flexibility | Independent VCC1/VCC2 rails allow mixed-voltage interfacing (e.g., 3.3 V MCU ↔ 5 V actuator side) |
Applications
| Battery Management System (BMS) | Traction Inverter Control |
|---|---|
Use Scenario: Isolating cell voltage monitoring ADC signals and pack contactor control lines between high-voltage battery stack and low-voltage MCU domain. IC Role / Device Role / Timing Role: Four-channel digital isolator providing reinforced insulation for analog front-end data acquisition and safety-critical relay enable/disable commands. Use Value: Enables precise, noise-immune voltage sampling at <3.5 μA/channel quiescent current-extending BMS standby battery life without compromising ASIL-B compliance. | Use Scenario: Transmitting PWM gate drive signals and fault feedback from IGBT/SiC driver ICs to MCU in high-dv/dt inverter stages. IC Role / Device Role / Timing Role: Signal isolator with 148 ns propagation delay and ±100 kV/μs CMTI, supporting 4 Mbps real-time gate control loop closure. Use Value: Prevents false triggering during 10 kV/μs transients in 800-V traction inverters while maintaining sub-250 ns pulse width integrity. |
| On-Board Charger (OBC) | Isolated DC/DC Converter |
Use Scenario: Isolating communication (UART/SPI) and status signals between primary-side controller and secondary-side monitoring in bidirectional OBC topologies. IC Role / Device Role / Timing Role: Bidirectional isolator with 3 forward + 1 reverse channels-enabling command uplink and telemetry downlink across isolation barrier. Use Value: Eliminates ground-loop interference in 6.6-kW OBC designs while meeting VDA320 requirements for 3000 VRMS working voltage. | Use Scenario: Providing isolated feedback for voltage regulation and fault signaling in auxiliary 12-V DC/DC converters powering infotainment and ADAS ECUs. IC Role / Device Role / Timing Role: High-reliability isolator with default-high output ensuring fail-safe shutdown of converter when primary-side power fails. Use Value: Guarantees controlled power-down sequence in safety-critical domains-preventing uncontrolled brown-out states in connected vehicle subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO7021QDBQRQ1 | 2-channel, same QSOP-16 package, identical 3000 VRMS rating and 4 Mbps rate, but lower quiescent current (2.8 μA/ch @ 3.3 V) | Suitable only where channel count reduction is acceptable; lacks third forward channel for complex feedback architectures | Select when BOM simplification and lowest possible static power are prioritized over multi-signal isolation density |
| SI8641ED-B-IS | 4-channel, 5000 VRMS, 150 kV/μs CMTI, but higher quiescent current (12 μA/ch @ 3.3 V) and non-AEC-Q100 qualified | Not certified for automotive Grade 1 operation; limited to industrial or commercial EV subsystems outside safety-critical zones | Choose only for non-safety-critical test benches or aftermarket accessories where automotive qualification is not mandated |
Compared with ISO7041QDBQRQ1, ISO7021QDBQRQ1 reduces channel count and static power but sacrifices signal routing flexibility in multi-feedback systems, while SI8641ED-B-IS trades automotive qualification and ultra-low power for higher CMTI and isolation rating-making it unsuitable for production vehicle BMS or inverter control.
Availability
ISO7041QDBQRQ1 is available at Aetrix Electronics and suitable for battery management systems, traction inverters, on-board chargers, and isolated DC/DC converters requiring stable component supply across automotive production lifecycles.
Supply support for ISO7041QDBQRQ1 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 delivering analog, embedded processing, and connectivity solutions with deep automotive expertise and functional safety infrastructure.
The ISO70xx-Q1 family was designed specifically for high-reliability, ultra-low-power signal isolation in EV/HEV powertrain systems-including BMS, inverters, and charging infrastructure-meeting AEC-Q100 Grade 1 and VDA320 requirements.
FAQ
What is the default output state of ISO7041QDBQRQ1 during power loss?
The ISO7041QDBQRQ1 has a default-high output configuration. When input-side power (VCC1) or signal is lost, all four output channels (OUTA–OUTD) transition to and hold a logic-high state after a 400–750 μs delay. This behavior is intrinsic to the device's internal refresh logic and watchdog timer, and is explicitly defined for the ISO7041-Q1 variant (without 'F' suffix). The ISO7041QDBQRQ1 must be selected-not the ISO7041F-Q1-for applications requiring fail-safe high assertion.
Does ISO7041QDBQRQ1 support independent supply voltages on each side of the isolation barrier?
Yes, ISO7041QDBQRQ1 supports fully independent supply rails: VCC1 (input side) and VCC2 (output side) can each operate from 3.0 V to 5.5 V simultaneously. This allows direct interfacing between 3.3-V microcontrollers and 5-V peripheral domains without level-shifting circuitry. The device maintains full functionality-including 4 Mbps data rate and specified CMTI-across all valid VCC1/VCC2 combinations, as validated in TI's SLLSFN3 datasheet Section 6.3.
What certifications does ISO7041QDBQRQ1 hold for automotive safety compliance?
ISO7041QDBQRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), meets VDA320 isolation requirements, and carries planned certifications including DIN VDE 0884-11:2017-01, UL 1577, IEC 60950-1, IEC 62368-1, IEC 61010-1, IEC 60601-1, and GB 4943.1-2011. Functional safety documentation is provided by Texas Instruments to aid ISO 26262 ASIL-B system-level design, though the device itself contains no embedded hardware safety mechanisms.
How does the refresh logic in ISO7041QDBQRQ1 ensure DC signal integrity?
The ISO7041QDBQRQ1 uses an internal watchdog timer that monitors input activity; if no edge transition occurs on any channel for >100 μs, the refresh logic forces transmission of the current DC input state across the barrier. This guarantees output matches input under static conditions-critical for safety-critical enable/disable signals in EV powertrain systems. The feature is always active and requires no external configuration, and is confirmed in Section 8.3.1 of the ISO7041QDBQRQ1 datasheet.
What is the maximum common-mode transient immunity (CMTI) specification for ISO7041QDBQRQ1?
ISO7041QDBQRQ1 delivers ±100 kV/μs typical common-mode transient immunity, measured per Figure 7-3 in the datasheet with VCM = 1200 V step input. This performance exceeds automotive requirements for inverter and charger applications, where rapid voltage transients across the isolation barrier could otherwise corrupt logic states. The value is validated across the full operating temperature range (–40°C to +125°C) and is not a guaranteed minimum-TI specifies a minimum of 50 kV/μs in Section 6.8.
ISO7041QDBQRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- ISO7041-Q1
- Package/Case:
- 16-SSOP (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:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 4Mbps
- Propagation Delay tpLH / tpHL (Max):
- 165ns, 165ns
- Pulse Width Distortion (Max):
- 10ns
- Rise / Fall Time (Typ):
- 16ns, 16ns (Max)
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
ISO7041QDBQRQ1 FAQ
1.How can I place an order for ISO7041QDBQRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7041QDBQRQ1 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 ISO7041QDBQRQ1 reliable?
The price and inventory of ISO7041QDBQRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7041QDBQRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7041QDBQRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7041QDBQRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7041QDBQRQ1?
ISO7041QDBQRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7041QDBQRQ1 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 ISO7041QDBQRQ1?
For technical support, including ISO7041QDBQRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7041QDBQRQ1 requirements.
6.How does Aetrix verify that ISO7041QDBQRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7041QDBQRQ1 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 ISO7041QDBQRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7041QDBQRQ1?
All ISO7041QDBQRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7041QDBQRQ1, 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 ISO7041QDBQRQ1 part is unused and in its original packaging.
Return procedure for ISO7041QDBQRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7041QDBQRQ1 Tags
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ISO1212DBQR
Texas Instruments
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ISO6721BDR
Texas Instruments
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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.
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ISO6741FQDWRQ1
Texas Instruments
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ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
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ISO7741DWR
Texas Instruments
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ISO7741FDWR
Texas Instruments
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