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Texas Instruments ISO7310CQDRQ1
- Part No.:
- ISO7310CQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7310CQDRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 1CH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,410
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Product details
Overview
ISO7310CQDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified single-channel capacitive digital isolator providing 3000 VRMS galvanic isolation, 25 Mbps signaling rate, and fail-safe low-default output for automotive powertrain and battery management systems. It operates from 3.3-V or 5-V supplies on both sides, features integrated input noise filtering, and delivers 65 kV/μs CMTI (5-V supply) for robust operation in noisy motor control and CAN interface environments.
For engineers reviewing the ISO7310CQDRQ1 datasheet, ISO7310CQDRQ1 pinout, ISO7310CQDRQ1 application, or ISO7310CQDRQ1 equivalent, this page delivers verified technical context, exact pin functions, automotive-grade safety certifications (UL 1577, VDE V 0884-10), real-world timing behavior (32 ns typical propagation delay), and validated alternative options for isolated signal transmission in safety-critical vehicle subsystems.
Technical Context
The ISO7310CQDRQ1 implements a dual-path capacitive isolation architecture: a high-frequency channel (100 kbps–25 Mbps) for data transmission and a low-frequency channel (DC–100 kbps) using internal PWM modulation and LPF demodulation to maintain DC correctness. Its TTL-compatible input thresholds (VIH = 2 V min, VIL = 0.8 V max) and fail-safe low output state during power loss ensure deterministic behavior in microcontroller-to-transceiver signal paths.
Isolation barrier integrity is maintained via 13 µm internal SiO₂ dielectric thickness, 4 mm creepage/clearance, and 400 V comparative tracking index (CTI). Safety limiting current (190 mA at 5.5 V) and thermal derating up to 125°C ambient protect against barrier degradation under fault conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS (1 min, UL 1577); 4242 VPK (DIN V VDE V 0884-10) |
| Signaling Rate | 25 Mbps - supports high-speed CAN FD and servo position feedback loops |
| Propagation Delay | 32 ns typical (5-V supply) - enables tight timing budgets in real-time motor control |
| CMTI | 65 kV/μs typical (5-V supply) - rejects fast transients in 48 V battery switching nodes |
| Supply Range | 3.0 V to 5.5 V on both VCC1 and VCC2 - allows level translation between MCU I/O and isolated transceivers |
| Fail-Safe Output | Low-default state when either supply is unpowered - prevents undefined logic states in safety-critical gate drivers |
| Ambient Temp Range | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for engine bay and battery pack placement |
Pinout & Package
Narrow-body SOIC-8 package (4.90 mm × 3.91 mm) with reinforced insulation barrier separating primary (VCC1/GND1/IN) and secondary (VCC2/GND2/OUT) sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Primary-side power supply | Supplies input buffer and HF/LF channel logic; must be decoupled within 2 mm using 0.1 µF capacitor |
| IN | Digital input signal | TTL-compatible single-ended input; accepts 0–5.5 V swing; includes integrated noise filter for <40 ns glitches |
| GND1 | Primary-side reference ground | Return path for VCC1 and IN; must be isolated from GND2 by ≥4 mm PCB creepage |
| VCC2 | Secondary-side power supply | Supplies output buffer and isolation barrier bias; independent of VCC1 for level-shifting applications |
| OUT | Digital output signal | CMOS-compatible output with VOH ≥4.7 V (5-V VCC2), VOL ≤0.4 V (4 mA load) |
| GND2 | Secondary-side reference ground | Return path for VCC2 and OUT; forms galvanic barrier with GND1; no direct connection permitted |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C), HBM ±4 kV, CDM ±1.5 kV - certified for powertrain ECU use |
| Integrated noise immunity | Input glitch suppression time ≤40 ns (5-V supply) - eliminates false triggering from EFT bursts in industrial fieldbus |
| Low-power operation | ICC1 = 1.9 mA / ICC2 = 3.8 mA at 1 Mbps (5-V supply) - reduces thermal load in sealed battery modules |
| Robust EMC performance | System-level ESD/EFT/surge immunity per IEC 61000-4-x - enables compliance without external protection components |
| Safety-certified barrier | 400 VRMS working voltage, 4242 VPK transient rating, >25-year lifetime - meets ISO 26262 ASIL-B requirements |
Applications
| Motor Control Interface | CAN Bus Isolation |
|---|---|
|
Use Scenario: Isolating PWM signals from MCU to gate driver IC in 48 V electric power steering (EPS) systems. IC Role / Device Role / Timing Role: Single-channel signal isolator bridging controller domain (3.3 V) and high-voltage power stage (5 V), enforcing timing-critical edge alignment with ≤32 ns propagation delay. Use Value: Prevents ground-loop noise from inverter switching (dV/dt > 10 kV/μs) from corrupting MCU logic while maintaining functional safety integrity. |
Use Scenario: Galvanically isolating CANH/CANL lines between body control module and battery management system (BMS). IC Role / Device Role / Timing Role: Fail-safe low-default isolator ensuring CAN transceiver enters recessive state during VCC2 brownout, avoiding bus lockup. Use Value: Enables reliable communication across 400 V battery pack isolation boundaries while meeting ISO 11898-2 EMC requirements. |
| Servo Feedback Loop | Power Supply Monitoring |
|
Use Scenario: Transmitting encoder quadrature signals from motor rotor to motion controller in automotive HVAC blower actuators. IC Role / Device Role / Timing Role: High-speed digital isolator preserving 25 Mbps edge fidelity for precise position tracking with minimal jitter (<20 ps pk-pk). Use Value: Maintains closed-loop accuracy under EMI stress (e.g., adjacent DC-DC converters) without requiring retransmission or error correction. |
Use Scenario: Isolating voltage monitor outputs (e.g., overvoltage alarm) from 12 V starter battery to infotainment domain processor. IC Role / Device Role / Timing Role: Low-power isolator operating at 1 Mbps with 1.4 mA ICC2 (3.3-V supply), enabling always-on monitoring with <10 µA quiescent current in sleep mode. Use Value: Eliminates risk of fault propagation from low-voltage battery faults into safety-critical ADAS domains while minimizing standby power draw. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8610BB-B-IS | Single-channel, 10 Mbps max rate, 50 kV/μs CMTI, 3.3-V only supply | Limited to lower-speed LIN or sensor interfaces; lacks AEC-Q100 Grade 1 certification | Choose for cost-sensitive non-safety applications where 25 Mbps and automotive temp range are unnecessary |
| ADUM1100ARZ-RL7 | Single-channel, 10 Mbps, 25 kV/μs CMTI, 3.0–5.5 V supply, no fail-safe default | No defined output state during power loss; requires external pull-up/down for deterministic behavior | Use where board space permits external biasing and system-level fault handling compensates for missing fail-safe logic |
Compared with SI8610BB-B-IS and ADUM1100ARZ-RL7, the ISO7310CQDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 25 Mbps speed, 65 kV/μs CMTI, and factory-programmed fail-safe low output-making it the only drop-in solution for ASIL-B CAN and motor control isolation without layout or firmware changes.
Availability
ISO7310CQDRQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, battery management systems, and isolated CAN interfaces requiring stable component supply across extended product lifecycles.
Supply support for ISO7310CQDRQ1 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 and embedded processing solutions, with over 50 years of innovation in precision analog, power management, and automotive-grade ICs.
The ISO7310-Q1 series was designed specifically for automotive signal isolation-targeting powertrain, chassis, and electrification systems needing AEC-Q100 qualified, high-CMTI, fail-safe digital isolators in compact SOIC packages.
FAQ
What is the fail-safe behavior of the ISO7310CQDRQ1 during power loss?
The ISO7310CQDRQ1 is factory-configured with a fail-safe low output: when either VCC1 or VCC2 drops below ~2.1 V, the OUT pin transitions to and holds a logic-low state. This behavior is hardwired in silicon and does not require external components. For ISO7310CQDRQ1, this ensures that gate drivers or transceivers default to safe-off states during undervoltage events-critical for ISO 26262-compliant automotive designs.
Does the ISO7310CQDRQ1 support level translation between 3.3-V and 5-V logic domains?
Yes, the ISO7310CQDRQ1 supports true bidirectional level translation: VCC1 may operate at 3.3 V while VCC2 runs at 5 V (or vice versa), with TTL-compatible input thresholds (VIH ≥2 V, VIL ≤0.8 V) and CMOS-output drive capability (VOH ≥VCC2 – 0.5 V, VOL ≤0.4 V). This enables seamless interfacing between 3.3-V microcontrollers and 5-V isolated CAN transceivers without external level shifters.
What safety certifications apply to the ISO7310CQDRQ1 isolation barrier?
The ISO7310CQDRQ1 carries UL 1577 (3000 VRMS, 1 minute), VDE V 0884-10 (4242 VPK, reinforced insulation), CSA Component Acceptance Notice 5A, and planned CQC GB4943.1-2011 certification. Its 4 mm creepage/clearance, 13 µm SiO₂ barrier thickness, and 400 V CTI meet IEC 60664-1 requirements for basic insulation at 400 VRMS working voltage in Pollution Degree 2 environments.
How does the ISO7310CQDRQ1 handle low-frequency or DC signals across the isolation barrier?
The ISO7310CQDRQ1 uses an adaptive dual-channel architecture: high-frequency pulses (≥100 kbps) pass directly through the capacitive barrier, while DC and low-frequency signals (<100 kbps) are internally PWM-modulated at ~1 MHz, transmitted across the barrier, then demodulated by an on-chip low-pass filter. This preserves DC accuracy and eliminates baseline drift-unlike optocouplers or single-mode digital isolators.
Can the ISO7310CQDRQ1 replace optocouplers in existing automotive designs without layout changes?
Yes-the ISO7310CQDRQ1 uses the industry-standard narrow-body SOIC-8 footprint (4.90 mm × 3.91 mm) with identical pad layout to legacy optocouplers like PC817. Its integrated noise filtering, 25 Mbps speed, and fail-safe low output eliminate the need for external RC filters, pull-up resistors, or biasing networks-enabling direct replacement in motor control, battery monitoring, and isolated feedback circuits.
ISO7310CQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-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:
- 1
- Inputs - Side 1/Side 2:
- 1/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 58ns, 58ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 2.5ns, 2ns
- Voltage - Supply:
- 3V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISO7310CQDRQ1 FAQ
1.How can I place an order for ISO7310CQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7310CQDRQ1 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 ISO7310CQDRQ1 reliable?
The price and inventory of ISO7310CQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7310CQDRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7310CQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7310CQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7310CQDRQ1?
ISO7310CQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7310CQDRQ1 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 ISO7310CQDRQ1?
For technical support, including ISO7310CQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7310CQDRQ1 requirements.
6.How does Aetrix verify that ISO7310CQDRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7310CQDRQ1 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 ISO7310CQDRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7310CQDRQ1?
All ISO7310CQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7310CQDRQ1, 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 ISO7310CQDRQ1 part is unused and in its original packaging.
Return procedure for ISO7310CQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7310CQDRQ1 Tags
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