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Texas Instruments ISO7320CQDRQ1
- Part No.:
- ISO7320CQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISO7320CQDRQ1.pdf
- Description:
- DGTL ISO 3000VRMS 2CH 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,844
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Product details
Overview
ISO7320CQDRQ1 from Texas Instruments is a dual-channel, unidirectional automotive-grade digital isolator with capacitive isolation barrier, 3000 VRMS/4242 VPK isolation rating, 25 Mbps signaling rate, and default-low fail-safe output behavior. It provides galvanic isolation between input-side (VCCI/GNDI) and output-side (VCCO/GNDO) domains in battery management systems and motor control interfaces.
For engineers reviewing the ISO7320CQDRQ1 datasheet, ISO7320CQDRQ1 pinout, ISO7320CQDRQ1 application, or ISO7320CQDRQ1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), integrated noise filtering for harsh EMI environments, 65 kV/μs CMTI (5-V supply), and SOIC-8 narrow-body package with reinforced insulation per VDE V 0884-10 and UL 1577.
Technical Context
The ISO7320CQDRQ1 implements dual independent unidirectional channels using capacitive SiO₂ isolation barriers, with separate 3.3-V/5-V input and output supply domains (VCCI/VCCO). Each channel employs a hybrid architecture combining high-frequency (100 kbps–25 Mbps) transient-detection path and low-frequency (DC–100 kbps) PWM-modulated path to maintain signal integrity across the full data rate range.
Its fail-safe logic asserts low-level outputs when either VCCI or VCCO drops below 2.1 V, confirmed by tfs = 7.5 μs delay from input power loss. Input thresholds follow TTL logic (VIH ≥ 2 V, VIL ≤ 0.8 V), and internal noise filters suppress sub-40 ns glitches per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3000 VRMS (1 min UL 1577) / 4242 VPK (VDE V 0884-10); enables reinforced insulation in 400 VRMS working voltage systems |
| Signaling Rate | 25 Mbps maximum; supports high-speed CAN FD, SPI, and PWM feedback loops without timing bottlenecks |
| Propagation Delay | 33 ns typical (5-V supply); ensures sub-35 ns channel-to-channel skew for time-critical motor gate drive synchronization |
| CMTI | 65 kV/μs typical (5-V supply); rejects fast transients in inverter switching nodes and battery disconnect events |
| Supply Range | VCCI and VCCO independently support 3.0–5.5 V; allows level translation between 3.3-V microcontrollers and 5-V analog front-ends |
| Fail-Safe Output | Default-low behavior on VCCI or VCCO undervoltage; prevents unintended actuation in safety-critical power stage control |
| Power Consumption | 0.9 mA/channel at 1 Mbps (3.3-V supply); reduces thermal load in sealed automotive ECUs |
Pinout & Package
Narrow-body SOIC-8 package (4.90 mm × 3.91 mm), RoHS-compliant, with creepage/clearance ≥4 mm and DTI = 13 µm per VDE V 0884-10.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 (Pin 1) | Input-side power supply | Bias source for INA/INB inputs; must be ≥3 V for valid TTL logic operation |
| INA (Pin 2) | Channel A input | Unidirectional logic input referenced to VCC1/GND1; accepts 0–5.5 V signals |
| INB (Pin 3) | Channel B input | Unidirectional logic input referenced to VCC1/GND1; electrically isolated from INA |
| GND1 (Pin 4) | Input-side ground | Reference return for VCC1, INA, and INB; forms isolation barrier boundary with GND2 |
| GND2 (Pin 5) | Output-side ground | Reference return for VCC2, OUTA, and OUTB; galvanically separated from GND1 |
| OUTA (Pin 6) | Channel A output | Unidirectional CMOS output referenced to VCC2/GND2; drives 4 mA sink/4 mA source |
| OUTB (Pin 7) | Channel B output | Unidirectional CMOS output referenced to VCC2/GND2; fails low if VCC2 < 2.1 V |
| VCC2 (Pin 8) | Output-side power supply | Bias source for OUTA/OUTB outputs; independent of VCC1 for level-shifting applications |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive powertrain and chassis modules |
| Integrated input noise filter | Rejects <40 ns pulses per spec, eliminating external RC filters in noisy motor drive PCB layouts |
| 65 kV/μs CMTI (5-V) | Prevents data corruption during 600-V bus switching transients in 48-V mild-hybrid inverters |
| Low propagation delay skew | tsk(o) = 2 ns ensures matched timing for dual PWM outputs in three-phase motor control |
| Reinforced isolation certification | VDE V 0884-10, UL 1577, CSA 5A, and IEC 61010-1 compliance for functional safety architectures |
Applications
| Motor Control Interface | Battery Management System |
|---|---|
Use Scenario: Isolating PWM gate drive signals from MCU in 48-V traction inverter. IC Role / Device Role / Timing Role: Dual-channel unidirectional isolator transmitting complementary high-side/low-side PWM with sub-35 ns propagation delay matching. Use Value: Prevents ground loop currents from disrupting MCU timing while maintaining <2 ns channel skew for precise dead-time control. |
Use Scenario: Transmitting cell voltage monitoring data from high-voltage battery stack to isolated MCU. IC Role / Device Role / Timing Role: Galvanic barrier for UART or SPI communication between 400-V domain and 3.3-V controller side. Use Value: Enables safe, noise-immune telemetry without optocoupler latency or aging drift in ASIL-B BMS designs. |
| Automotive CAN Transceiver Interface | Servo Drive Feedback Loop |
Use Scenario: Isolating CANH/CANL lines between vehicle body ECU and isolated gateway module. IC Role / Device Role / Timing Role: Signal isolator for CAN RX/TX paths, decoupling ground potentials across domains. Use Value: Eliminates common-mode noise coupling that causes CAN bus errors during load dump events. |
Use Scenario: Isolating encoder quadrature signals and current-sense ADC outputs in industrial servo drives. IC Role / Device Role / Timing Role: High-speed digital isolator preserving edge integrity of 1-MHz A/B/Z index pulses. Use Value: Maintains position accuracy under 65 kV/μs transients from adjacent IGBT switching in compact drive enclosures. |
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 |
|---|---|---|---|
| ISO7320CQDQ1 | Same SOIC-8 package and isolation specs, but default-high fail-safe output (no 'F' suffix) | Preferred where safety logic requires active-high fault indication on power loss | Select ISO7320CQDQ1 only if system architecture mandates high-default fail-safe state |
| SI8620ED-B-IS | 25 Mbps, 3000 VRMS, but uses capacitive isolation with different CMTI (40 kV/μs) and no AEC-Q100 Grade 1 rating | Suitable for industrial automation but not qualified for automotive powertrain or chassis use | Choose SI8620ED-B-IS only for non-automotive applications requiring same pinout and speed |
Compared with ISO7320CQDQ1 and SI8620ED-B-IS, ISO7320CQDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 65 kV/μs CMTI, and default-low fail-safe behavior-making it the only option certified for safety-critical automotive motor control where low-state default prevents unintended activation during brownout.
Availability
ISO7320CQDRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, motor control inverters, and isolated CAN gateway modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ISO7320CQDRQ1 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 signal chain solutions.
The ISO732x-Q1 product line delivers robust EMC performance and low-power dual-channel isolation for automotive subsystems including EV powertrain, ADAS sensor interfaces, and chassis control units.
FAQ
What is the fail-safe behavior of ISO7320CQDRQ1 during input power loss?
The ISO7320CQDRQ1 asserts low-level outputs (OUTA and OUTB) when either VCCI or VCCO falls below 2.1 V, with a guaranteed tfs delay of 7.5 μs. This default-low behavior is inherent to the 'R' suffix variant and ensures safe shutdown of downstream power stages. ISO7320CQDRQ1 maintains this response across its full –40°C to +125°C operating range without external circuitry.
Does ISO7320CQDRQ1 support level translation between 3.3-V and 5-V logic domains?
Yes, ISO7320CQDRQ1 supports independent 3.0–5.5 V supplies on both sides: VCCI powers the input channels (INA/INB) and VCCO powers the output channels (OUTA/OUTB). This enables seamless bidirectional level shifting-for example, interfacing a 3.3-V microcontroller to a 5-V gate driver-without external voltage translators or level shifters.
What regulatory certifications apply to ISO7320CQDRQ1?
ISO7320CQDRQ1 is certified to UL 1577 (3000 VRMS), VDE V 0884-10 (4242 VPK), CSA Component Acceptance Notice 5A, IEC 60950-1, and IEC 61010-1. It also meets AEC-Q100 Grade 1 requirements (–40°C to +125°C) and carries planned CQC certification per GB4943.1-2011. All certifications are validated for the SOIC-8 package.
How does ISO7320CQDRQ1 handle high-frequency noise on input signals?
ISO7320CQDRQ1 integrates on-die noise filters that reject input pulses shorter than 40 ns, eliminating the need for external RC filters in noisy environments like motor drives. Its 65 kV/μs CMTI (typical, 5-V supply) ensures immunity to fast transients induced by IGBT switching, and the input threshold hysteresis (460 mV) further enhances noise margin against slow-rising interference.
What is the channel configuration of ISO7320CQDRQ1 compared to ISO7321-Q1 devices?
ISO7320CQDRQ1 has both channels configured unidirectionally in the same direction (input → output), whereas ISO7321-Q1 devices feature opposite-direction channels (one input→output, one output→input). This makes ISO7320CQDRQ1 ideal for dual-signal transmission (e.g., PWM A/B), while ISO7321-Q1 suits bidirectional protocols like I²C. Pinouts differ: INA/INB are on pins 2/3 for ISO7320CQDRQ1, but INB moves to pin 3 and OUTA to pin 2 in ISO7321-Q1.
ISO7320CQDRQ1 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:
- 2
- Inputs - Side 1/Side 2:
- 2/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 57ns, 57ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 2.4ns, 2.1ns
- 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
ISO7320CQDRQ1 FAQ
1.How can I place an order for ISO7320CQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISO7320CQDRQ1 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 ISO7320CQDRQ1 reliable?
The price and inventory of ISO7320CQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISO7320CQDRQ1 is usually 5 days.
3.What payment methods are accepted for ISO7320CQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISO7320CQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISO7320CQDRQ1?
ISO7320CQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISO7320CQDRQ1 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 ISO7320CQDRQ1?
For technical support, including ISO7320CQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISO7320CQDRQ1 requirements.
6.How does Aetrix verify that ISO7320CQDRQ1 is sourced from the original manufacturer or authorized distributors?
All ISO7320CQDRQ1 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 ISO7320CQDRQ1 meets industry standards.
7.What is the process for return or replacement of ISO7320CQDRQ1?
All ISO7320CQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with ISO7320CQDRQ1, 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 ISO7320CQDRQ1 part is unused and in its original packaging.
Return procedure for ISO7320CQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISO7320CQDRQ1 Tags
-
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
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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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