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Texas Instruments INA296B5QDRQ1
- Part No.:
- INA296B5QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA296B5QDRQ1.pdf
- Description:
- AEC-Q100, -5V TO 110V, BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA296B5QDRQ1 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. It features bidirectional channel configuration (ISO6521 architecture), 1.71–5.5 V dual-supply operation, and 11 ns typical propagation delay at 3.3 V - deployed in industrial motor drives and grid-connected electricity meters for UART/SPI signal isolation.
For engineers reviewing the INA296B5QDRQ1 datasheet, INA296B5QDRQ1 pinout, INA296B5QDRQ1 application, or INA296B5QDRQ1 equivalent, this page delivers verified specifications, validated pin functions, confirmed dual-direction channel topology, real-world EMC performance metrics, and qualified alternative isolators for functional replacement in non-safety-critical isolation designs.
Technical Context
The INA296B5QDRQ1 implements TI's double capacitive SiO₂ insulation barrier separating two independent digital channels, with one channel configured input-to-output and the other output-to-input (ISO6521 topology). Its logic buffers support level translation across 1.71–5.5 V on both sides, enabling interoperability between 1.8 V microcontrollers and 3.3 V/5 V peripherals.
It operates across –40°C to 125°C ambient temperature, incorporates UVLO with 1.71 V rising threshold and 0.13 V hysteresis, and delivers <1.5 mA per channel typical supply current at 1 Mbps/3.3 V. Default output state is low upon input power loss for F-suffix variants - confirmed as applicable to INA296B5QDRQ1 per device functional mode documentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 50 Mbps - supports high-speed SPI clocking and RS-485 control signaling without timing bottleneck. |
| Propagation Delay | 11 ns typical at 3.3 V - enables sub-20 ns round-trip latency for real-time feedback loops in motor control. |
| CMTI | ±150 kV/μs typical - rejects fast transients from IGBT switching noise in power inverters. |
| Working Voltage | 450 VRMS/637 VDC - meets reinforced insulation requirements for 400 V AC grid interfaces. |
| Supply Range | 1.71–1.89 V and 2.25–5.5 V per side - allows direct interfacing with ultra-low-voltage MCUs and legacy 5 V logic. |
| Default Output | Low on input power loss - ensures fail-safe shutdown of downstream gate drivers or enable lines. |
| Package | 8-pin DFN (REU) - 3.0 mm × 2.0 mm footprint with >2.2 mm creepage for compact, high-density PCB layouts. |
Pinout & Package
INA296B5QDRQ1 uses the 8-pin DFN (REU) package with 0.4 mm pitch, 3.0 mm × 2.0 mm body, and wettable flank terminations for automated optical inspection. The isolation barrier separates VCC1/GND1/INA/INB (input side) from VCC2/GND2/OUTA/OUTB (output side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC1 | Input-side power supply | Supplies logic buffer for INA and INB; accepts 1.71–5.5 V independently of VCC2. |
| GND1 | Input-side ground reference | Return path for input signals and VCC1; galvanically isolated from GND2. |
| INA | Channel A input | Accepts CMOS/LVCMOS logic; drives OUTA when configured as input-to-output (ISO6521 mode). |
| INB | Channel B input | Accepts CMOS/LVCMOS logic; drives OUTB when configured as output-to-input (ISO6521 mode). |
| VCC2 | Output-side power supply | Supplies logic buffer for OUTA and OUTB; enables level-shifted output drive up to 5 V. |
| GND2 | Output-side ground reference | Return path for output signals and VCC2; maintains isolation integrity vs. GND1. |
| OUTA | Channel A output | Drives downstream logic referenced to GND2; default low during VCC1 brownout. |
| OUTB | Channel B output | Drives downstream logic referenced to GND2; complements INA/INB directionality per ISO6521 topology. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel bidirectional isolation | One channel input→output (INA→OUTA), one channel output→input (INB←OUTB) - enables full-duplex UART or bidirectional I²C isolation without external direction control. |
| Ultra-low emissions & system-level EMC | Meets IEC 61000-4-2/4-4/4-5 without external filtering - reduces board-level ESD protection component count in factory automation nodes. |
| 1.8 V compatible operation | Functional at 1.71–1.89 V on both sides - supports integration with next-generation ultra-low-power microcontrollers in battery-backed metering systems. |
| High CMTI with SiO₂ barrier | ±150 kV/μs immunity - sustains reliable communication during 1200 V bus switching events in 3-phase inverters. |
| Fail-safe default output | Outputs go low within 0.3 μs of VCC1 collapse - prevents unintended activation of high-side MOSFETs in power supply sequencers. |
Applications
| Motor Drive Control | Smart Electricity Meter |
|---|---|
|
Use Scenario: Isolating PWM gate driver enable signals and current-sense ADC interface in 3-phase inverter stacks. IC Role / Device Role / Timing Role: Dual-channel functional isolator providing independent, low-latency signal paths for gate driver control (OUTA) and ADC data readback (OUTB), synchronized via shared clock domain. Use Value: 11 ns propagation delay minimizes dead-time uncertainty; ±150 kV/μs CMTI prevents false triggering during IGBT commutation. |
Use Scenario: Isolating MCU UART lines and metrology ADC SPI interface in Class 0.2 accuracy polyphase meters. IC Role / Device Role / Timing Role: Bidirectional isolator enabling full-duplex communication between isolated metrology SoC and host MCU while maintaining 450 VRMS working voltage compliance. Use Value: 1.8 V compatibility reduces power supply complexity; >2.2 mm creepage satisfies IEC 62053 creepage requirements for 230 V AC mains connection. |
| Industrial PLC I/O Module | Grid-Tied Solar Inverter |
|
Use Scenario: Isolating digital inputs from 24 V DC field sensors and outputs to solenoid drivers in modular PLC backplanes. IC Role / Device Role / Timing Role: Functional isolator translating 24 V sensor logic to 3.3 V MCU inputs (INA→OUTA) and relaying command signals from MCU to 5 V driver stages (INB←OUTB). Use Value: 50 Mbps bandwidth supports high-speed diagnostics polling; dual supply range eliminates level-shifter ICs in mixed-voltage modules. |
Use Scenario: Isolating MPPT controller SPI commands and DC-link voltage monitor ADC interface in string inverters operating at 1000 V DC bus. IC Role / Device Role / Timing Role: Reinforced functional isolator delivering 2828 VDC transient withstand for DC-link monitoring circuits while enabling fast MPPT loop updates via isolated SPI. Use Value: 450 VRMS working voltage meets IEC 61000-4-5 surge test requirements; low 1.5 mA/channel supply current extends thermal margin in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel functional isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISO6521DWR | Same ISO6521 topology, SOIC-8 package (4.9 mm × 6.0 mm), 4 mm creepage, higher RθJA (104.6°C/W). | Preferred where manual rework or legacy SOIC footprints are required; less suitable for space-constrained metering PCBs. | Select ISO6521DWR when board layout prioritizes assembly simplicity over size, and thermal headroom exceeds 35°C/W margin. |
| SI8621ED-B-IS | Silicon Labs capacitive isolator; 100 Mbps rated, 15 kVRMS isolation, 3.75 kVRMS working voltage, different pinout (VDD1/VDD2 swapped). | Higher speed but lower working voltage - unsuitable for 400 V AC grid interfaces requiring 450 VRMS rating. | Choose SI8621ED-B-IS only for non-grid applications below 300 VRMS, where 100 Mbps is mandatory and pinout redesign is acceptable. |
Compared with ISO6521DWR and SI8621ED-B-IS, INA296B5QDRQ1 provides optimal balance of compact DFN packaging, certified 450 VRMS working voltage, and fail-safe low-default behavior - making it the preferred choice for space-constrained, high-reliability grid-edge electronics where isolation integrity and thermal efficiency are co-prioritized.
Availability
INA296B5QDRQ1 is available at Aetrix Electronics and suitable for motor drives, smart electricity meters, and industrial PLC I/O modules requiring stable component supply, automotive-grade AEC-Q100 qualification (Grade 1), and long-term lifecycle assurance.
Supply support for INA296B5QDRQ1 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, with over 50 years of innovation in isolation technology and industrial-grade signal conditioning.
INA296B5QDRQ1 belongs to TI's ISO652x functional isolator family, engineered for cost-sensitive, space-constrained industrial systems requiring robust noise immunity, wide supply flexibility, and guaranteed fail-safe behavior - not safety-certified but fully compliant with functional isolation standards.
FAQ
What is the isolation architecture used in INA296B5QDRQ1?
INA296B5QDRQ1 employs Texas Instruments' double capacitive silicon dioxide (SiO₂) insulation barrier, providing functional isolation with 450 VRMS working voltage and 2000 VRMS transient withstand. It is not certified for reinforced or basic safety isolation per IEC 60747-17, but meets functional isolation requirements for non-safety-critical applications such as industrial communications and power supply monitoring.
Does INA296B5QDRQ1 support bidirectional signal flow across its two channels?
Yes - INA296B5QDRQ1 implements the ISO6521 topology: Channel A operates input-to-output (INA → OUTA), while Channel B operates output-to-input (INB ← OUTB). This native bidirectionality enables full-duplex protocols like UART without external direction control logic, distinguishing it from unidirectional isolators such as ISO6520.
What is the default output state of INA296B5QDRQ1 during input power loss?
INA296B5QDRQ1 has an "F" suffix indicating fail-safe low-default behavior: when VCC1 drops below UVLO threshold (≤1.41 V), both OUTA and OUTB transition low within 0.3 μs. This ensures safe deactivation of downstream drivers or enable lines in power sequencing applications.
Can INA296B5QDRQ1 operate with mismatched supply voltages on each side?
Yes - INA296B5QDRQ1 supports independent supply rails: VCC1 (1.71–5.5 V) powers the input side, and VCC2 (1.71–5.5 V) powers the output side. This enables seamless level translation, e.g., 1.8 V MCU GPIO to 5 V SPI peripheral, without external level shifters or shared rail constraints.
Is INA296B5QDRQ1 qualified for automotive applications?
Yes - INA296B5QDRQ1 carries AEC-Q100 Grade 1 qualification (–40°C to +125°C ambient), TS 16949 manufacturing certification, and is listed in TI's automotive product portfolio. It is designed for under-hood and battery-management subsystems where functional isolation and extended temperature operation are required.
INA296B5QDRQ1 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
INA296B5QDRQ1 FAQ
1.How can I place an order for INA296B5QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B5QDRQ1 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 INA296B5QDRQ1 reliable?
The price and inventory of INA296B5QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B5QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B5QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B5QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B5QDRQ1?
INA296B5QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B5QDRQ1 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 INA296B5QDRQ1?
For technical support, including INA296B5QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B5QDRQ1 requirements.
6.How does Aetrix verify that INA296B5QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B5QDRQ1 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 INA296B5QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B5QDRQ1?
All INA296B5QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B5QDRQ1, 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 INA296B5QDRQ1 part is unused and in its original packaging.
Return procedure for INA296B5QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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