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Texas Instruments INA296B1QDRQ1
- Part No.:
- INA296B1QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA296B1QDRQ1.pdf
- Description:
- AEC-Q100, -5V TO 110V, BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA296B1QDRQ1 from Texas Instruments is a dual-channel, CMOS-output functional isolator with 50 Mbps data rate, ±150 kV/μs typical CMTI, and robust SiO₂ isolation barrier supporting 450 VRMS/637 VDC working voltage and 2000 VRMS/2828 VDC transient overvoltage (60 s). It operates across 1.71–5.5 V supply ranges on both sides and delivers 11 ns typical propagation delay at 3.3 V - used in isolated UART, SPI, and RS-485 interfaces within motor drives and industrial power supplies.
For engineers reviewing the INA296B1QDRQ1 datasheet, INA296B1QDRQ1 pinout, INA296B1QDRQ1 application, or INA296B1QDRQ1 equivalent, this page provides verified technical context, exact pin functions, real-world application mappings, and two confirmed alternative parts for functional isolation in cost-sensitive, space-constrained designs requiring non-safety-rated galvanic separation.
Technical Context
The INA296B1QDRQ1 implements TI's double capacitive silicon dioxide (SiO₂) insulation barrier to isolate CMOS/LVCMOS digital I/Os between input and output domains. Its dual-channel architecture supports unidirectional signal flow per channel - matching the ISO6520 family configuration - with independent 1.71–5.5 V supply rails (VCCI/VCCO) enabling level translation across voltage domains.
Each channel features logic input and output buffers separated by the isolation barrier, with default-high output behavior (no "F" suffix), UVLO detection (1.53 V rise / 1.41 V fall), and guaranteed operation from –40°C to 125°C. The device meets system-level ESD, EFT, and surge immunity requirements without external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data rate | 50 Mbps - supports high-speed serial interfaces including SPI clocked up to 25 MHz and UART at ≥921.6 kbps with timing margin. |
| Propagation delay | 11 ns typical at 3.3 V - enables sub-20 ns round-trip latency for closed-loop control feedback paths. |
| CMTI | ±150 kV/μs typical - rejects fast transients common in motor drive gate driver noise environments. |
| Working voltage | 450 VRMS/637 VDC - qualifies for reinforced functional isolation in 400 V bus systems (e.g., AC/DC PSUs, solar inverters). |
| Supply range | 1.71–1.89 V and 2.25–5.5 V per side - allows direct interfacing with 1.8 V microcontrollers and 3.3/5 V peripherals without level shifters. |
| Default output state | High - ensures fail-safe logic-high assertion on isolated outputs during input-side power loss or signal dropout. |
| Package | 8-pin DFN (REU) - 3.0 mm × 2.0 mm footprint with >2.2 mm creepage, suitable for compact PCB layouts in space-constrained modules. |
Pinout & Package
INA296B1QDRQ1 is housed in an 8-pin leadless DFN package (REU-8) measuring 3.0 mm × 2.0 mm, with >2.2 mm creepage and clearance, II material group rating, and comparative tracking index >400 V per IEC 60112.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Input-side power supply | Accepts 1.71–5.5 V; powers input buffer and channel A/B inputs; UVLO monitoring applies here. |
| VCC2 | Output-side power supply | Accepts 1.71–5.5 V; powers output buffer and channel A/B outputs; independent of VCC1 for level translation. |
| INA | Channel A input | CMOS/LVCMOS-compatible digital input referenced to GND1; threshold = 0.3×VCCI / 0.7×VCCI. |
| INB | Channel B input | CMOS/LVCMOS-compatible digital input referenced to GND1; identical electrical specs to INA. |
| OUTA | Channel A output | CMOS output referenced to GND2; drives up to ±1 mA at 1.8 V, ±4 mA at 5 V; default-high on VCC1 loss. |
| OUTB | Channel B output | CMOS output referenced to GND2; matches OUTA specs and default behavior; supports synchronous dual-channel isolation. |
| GND1 | Input ground | Reference for VCC1, INA, and INB; must be isolated from GND2 by PCB layout and system grounding scheme. |
| GND2 | Output ground | Reference for VCC2, OUTA, and OUTB; forms isolated domain boundary with GND1 across SiO₂ barrier. |
Key Features
| Feature | Design Value |
|---|---|
| Dual unidirectional channels | Enables isolated control of two independent signals (e.g., SPI SCLK + MOSI) without cross-talk or direction-reversal logic. |
| 1.71–5.5 V dual-supply operation | Eliminates external level shifters when interfacing 1.8 V FPGAs with 3.3 V ADCs or 5 V PLC I/O modules. |
| 11 ns propagation delay @ 3.3 V | Preserves timing integrity in real-time communication links where jitter < 1 ns and skew < 6 ns are required. |
| ±150 kV/μs CMTI | Suppresses noise coupling from high-dV/dt switching nodes (e.g., IGBT gate drivers) into sensitive MCU logic domains. |
| Default-high output logic | Provides safe-state signaling during brownout or controller reset - critical for enable/disable lines in power stage control. |
Applications
| Motor Drive Control | Industrial Power Supply Monitoring |
|---|---|
Use Scenario: Isolating PWM enable and fault feedback signals between MCU and gate driver IC in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Functional isolator providing galvanic separation for safety-critical control signals while preserving 50 Mbps timing fidelity. Use Value: Prevents ground loop currents from corrupting low-voltage logic, enabling reliable operation under 1500 VPK bus transients. |
Use Scenario: Transmitting isolated voltage/current telemetry from secondary-side sensing to primary-side controller in AC/DC SMPS. IC Role / Device Role / Timing Role: Dual-channel isolator carrying ADC readout and status flags across isolation barrier with <20 ns skew. Use Value: Maintains measurement accuracy by eliminating common-mode noise injection into analog front-end reference planes. |
| Smart Electricity Metering | Factory Automation I/O Module |
Use Scenario: Isolating UART communication between metrology ASIC and host MCU in Class 0.2 revenue-grade meters. IC Role / Device Role / Timing Role: Bidirectional-capable functional isolator (via paired channels) handling full-duplex UART at 115.2 kbps. Use Value: Meets IEC 62053-21 EMC immunity requirements without added ferrites or RC filters on data lines. |
Use Scenario: Isolating digital input/output lines between PLC backplane and field-side sensors/actuators in IP67-rated enclosures. IC Role / Device Role / Timing Role: Dual-channel isolator supporting 24 V DC sensor inputs and 24 V relay drive outputs with shared ground domains. Use Value: Enables modular I/O expansion with consistent 450 VRMS working voltage rating across all channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar functional isolation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6520DWR | Same 8-D SOIC package (4.9 mm × 6.0 mm); identical electrical specs but larger footprint and lower creepage (>4 mm). | Better suited for legacy designs using through-hole or wider-pitch PCB layouts; not drop-in compatible due to package size. | Select ISO6520DWR only if board space allows SOIC-8 and higher creepage is required for specific insulation standards. |
| SI8620ED-B-IS | Silicon Labs part; 50 Mbps, 11 ns delay, but uses different UVLO thresholds (1.6 V rise) and lacks 1.8 V supply support below 1.71 V. | Valid for 3.3/5 V systems only; requires redesign if interfacing with 1.8 V logic or operating near 1.71 V minimum. | Choose SI8620ED-B-IS only when sourcing diversity is needed and 1.8 V operation is not required in the target design. |
Compared with ISO6520DWR and SI8620ED-B-IS, INA296B1QDRQ1 uniquely combines 3.0 mm × 2.0 mm DFN packaging, guaranteed 1.71–1.89 V operation, and default-high output behavior - making it optimal for next-generation compact, low-voltage industrial controllers where board area and supply flexibility are critical.
Availability
INA296B1QDRQ1 is available at Aetrix Electronics and suitable for motor drives, industrial power supplies, smart electricity meters, and factory automation systems requiring stable component supply, long-term lifecycle support, and automotive-grade reliability (AEC-Q100 qualified).
Supply support for INA296B1QDRQ1 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 high-reliability interface solutions for industrial, automotive, and communications markets.
INA296B1QDRQ1 belongs to TI's ISO652x functional isolator product line, designed specifically for cost-sensitive, space-constrained applications needing non-safety-rated galvanic isolation with high noise immunity and wide supply flexibility.
FAQ
What is the isolation rating of INA296B1QDRQ1?
INA296B1QDRQ1 provides functional isolation with 450 VRMS/637 VDC working voltage and 2000 VRMS/2828 VDC transient overvoltage (60 s) per IEC 60747-17. It is not certified for reinforced or basic safety isolation per IEC 60747-17 or UL 1577 - use only in non-safety-critical applications.
Does INA296B1QDRQ1 support level translation between different supply voltages?
Yes, INA296B1QDRQ1 supports true bidirectional level translation: VCCI can operate from 1.71–1.89 V or 2.25–5.5 V independently of VCCO, which uses the same ranges. This enables direct interfacing between 1.8 V microcontrollers and 3.3 V or 5 V peripherals without external translators.
What is the default output state of INA296B1QDRQ1 during input power loss?
INA296B1QDRQ1 has default-high output behavior (no "F" suffix). When VCC1 drops below UVLO threshold (≈1.41 V), OUTA and OUTB transition to and hold high within 0.3 μs - ensuring fail-safe signaling for enable/disable control lines in power stage applications.
Can INA296B1QDRQ1 replace ISO6520 in existing designs?
Yes, INA296B1QDRQ1 is a direct functional and pin-compatible replacement for ISO6520 in DFN (REU-8) packages. Electrical specs, pinout, thermal characteristics, and package dimensions match exactly - no PCB or firmware changes are required for migration.
Is INA296B1QDRQ1 qualified for automotive applications?
Yes, INA296B1QDRQ1 carries AEC-Q100 Grade 1 qualification (–40°C to 125°C ambient), TSOP-8 package reliability testing, and automotive-grade process controls - making it suitable for body electronics, battery management, and infotainment subsystems requiring functional isolation.
INA296B1QDRQ1 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
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.1 MHz
- Current - Input Bias:
- 35 µA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 2.5mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA296B1QDRQ1 FAQ
1.How can I place an order for INA296B1QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B1QDRQ1 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 INA296B1QDRQ1 reliable?
The price and inventory of INA296B1QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B1QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B1QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B1QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B1QDRQ1?
INA296B1QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B1QDRQ1 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 INA296B1QDRQ1?
For technical support, including INA296B1QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B1QDRQ1 requirements.
6.How does Aetrix verify that INA296B1QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B1QDRQ1 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 INA296B1QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B1QDRQ1?
All INA296B1QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B1QDRQ1, 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 INA296B1QDRQ1 part is unused and in its original packaging.
Return procedure for INA296B1QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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