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Texas Instruments INA296B4QDDFRQ1
- Part No.:
- INA296B4QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296B4QDDFRQ1.pdf
- Description:
- AEC-Q100, -5-V TO 110-V, BIDIREC
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
INA296B4QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with 100V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and ±150µV max input offset voltage. It enables precision high-side or low-side shunt-based current monitoring in 48V/12V DC/DC converters and battery management systems.
For engineers reviewing the INA296B4QDDFRQ1 datasheet, INA296B4QDDFRQ1 pinout, INA296B4QDDFRQ1 application, or INA296B4QDDFRQ1 equivalent, this page delivers verified specifications, SOT-23-8 pin mapping, functional safety documentation support, and validated alternatives for automotive power rail monitoring.
Technical Context
The INA296B4QDDFRQ1 uses a zero-drift, precision topology optimized for bidirectional sensing across wide common-mode voltages (−5V to 110V), independent of its 2.7V–20V supply. Its 1.1MHz small-signal bandwidth and 8V/µs slew rate support fast overcurrent detection in transient-rich environments like motor drives and DC/DC controllers.
It features dual reference inputs (REF1/REF2) enabling configurable unidirectional or bidirectional output swing, with internal resistor divider accuracy of ±0.02% (max) and 166dB CMRR at DC. Input bias current remains constant at 35µA (typ) across full common-mode range - not voltage-proportional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - fixed ratio; converts ±10mV shunt voltage to ±1V output for ADC interfacing with minimal scaling error. |
| Common-mode range | −5V to 110V - supports high-side sensing on 48V bus with negative transients and 12V low-side monitoring without level-shifting. |
| Bandwidth | 1.1MHz - enables accurate capture of fast current transients (e.g., MOSFET switching edges) in real-time protection circuits. |
| Input offset voltage | ±150µV (max) - limits measurement error to ≤0.15% at 100mV full-scale VSENSE; drift ±0.5µV/°C ensures stability over −40°C to +125°C. |
| CMRR | 130dB (min) - rejects >99.99% of common-mode noise from noisy power rails, critical for accurate current reading in EMI-heavy automotive environments. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V logic supplies while operating on 12V/48V system rails via separate VS connection. |
| Quiescent current | 2.5mA - enables integration into always-on vehicle subsystems without excessive standby power draw. |
Pinout & Package
INA296B4QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, suitable for space-constrained automotive PCB layouts with thermal resistance RθJA = 129.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connects to load side (high-side) or ground side (low-side) of shunt; differential input with IN+ defines VSENSE. |
| GND (Pin 2) | Ground reference | System ground return for internal circuitry; must be low-impedance path to minimize measurement error. |
| REF2 (Pin 3) | Reference voltage input | Configures output mid-point; tied to GND for unidirectional mode or to VS/2 for bidirectional centered output. |
| NC (Pin 4) | No-connect terminal | Reserved pin; must be connected to GND per datasheet to ensure proper internal biasing and noise immunity. |
| OUT (Pin 5) | Analog output | Provides amplified, referenced VSENSE × 100; rail-to-rail swing (VS − 0.2V min, 8mV above GND) interfaces directly with SAR ADCs. |
| VS (Pin 6) | Power supply | 2.7V–20V analog supply; powers internal amplifier and reference network; decoupling capacitor required at pin. |
| REF1 (Pin 7) | Reference voltage input | Second reference input; functionally identical to REF2; used with REF2 to set output offset and polarity. |
| IN+ (Pin 8) | Positive current-sense input | Connects to bus-voltage side (high-side) or load side (low-side) of shunt; forms differential pair with IN−. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing capability | Supports both sourcing and sinking current measurement using REF1/REF2 to center output at VS/2 - essential for regenerative braking and BMS charge/discharge tracking. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C ambient operation with full parametric performance guaranteed - meets automotive engine bay and powertrain requirements. |
| Functional safety documentation | TI provides FIT rate, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system certification. |
| Survival voltage rating | Withstands −20V to +120V common-mode transients without damage - protects against load dump, jump-start, and inductive kick events. |
| Low input bias current | 35µA (typ) independent of common-mode voltage - avoids shunt measurement errors caused by leakage, especially with high-value shunts (>10mΩ). |
Applications
| DC/DC Converter Monitoring | Battery Management Systems |
|---|---|
Use Scenario: Real-time current monitoring in 48V–12V buck converters for ADAS domain controllers. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth capturing switch-node transients for cycle-by-cycle overcurrent protection. Use Value: Enables <1µs response to fault conditions, reducing MOSFET stress and improving converter reliability under short-circuit events. |
Use Scenario: Cell-level and pack-level current sensing in EV traction battery packs. IC Role / Device Role / Timing Role: Precision bidirectional amplifier measuring charge/discharge currents with ±150µV offset to maintain SOC accuracy over temperature. Use Value: Delivers <0.2% full-scale current measurement error across −40°C to +125°C, supporting ISO 26262-compliant state-of-charge estimation. |
| Fuel Cell Control Unit | Smart Junction Box |
Use Scenario: Anode/cathode current balancing and hydrogen/oxygen flow regulation in PEM fuel cell stacks. IC Role / Device Role / Timing Role: Ultra-stable current monitor with ±5ppm/°C gain drift ensuring consistent gas stoichiometry control during thermal cycling. Use Value: Maintains <±0.1% gain error over lifetime, preventing inefficient reactant utilization and membrane degradation. |
Use Scenario: Load current supervision and electronic fuse triggering in vehicle central power distribution units. IC Role / Device Role / Timing Role: Fast-settling (1µs to 1%) current amplifier feeding microcontroller ADC for real-time load profiling and short-circuit tripping. Use Value: Reduces false trip rate by rejecting >130dB of common-mode noise from adjacent high-current solenoids and motors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDRQ1 | 100V/V gain, but ±120µV max offset and 400kHz bandwidth; no REF1/REF2 pins - unidirectional only. | Limited to unidirectional sensing; insufficient for regenerative braking or bidirectional BMS use cases. | Select when cost sensitivity outweighs need for bidirectionality and higher bandwidth. |
| MAX40056ATA+T | 100V/V gain, ±50µV offset, 1.5MHz bandwidth, but only −0.2V to 65V common-mode range and no AEC-Q100 qualification. | Not qualified for automotive; unsuitable for 48V high-side sensing above 65V or under temperature extremes. | Consider only for industrial non-automotive applications requiring tighter offset and higher speed. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA296B4QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, true bidirectional operation via dual reference inputs, and 110V common-mode capability - making it the only option for robust 48V automotive current monitoring where polarity reversal and extended voltage range are mandatory.
Availability
INA296B4QDDFRQ1 is available at Aetrix Electronics and suitable for automotive power conversion, battery management systems, and smart junction box designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for INA296B4QDDFRQ1 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 and embedded processing technologies, with decades of automotive-grade IC development expertise and rigorous AEC-Q100 validation infrastructure.
The INA296x-Q1 product line was designed specifically for high-precision, high-voltage bidirectional current sensing in next-generation 48V mild-hybrid and electric vehicle architectures - prioritizing functional safety, thermal robustness, and noise immunity.
FAQ
What is the maximum common-mode voltage the INA296B4QDDFRQ1 can withstand during normal operation?
The INA296B4QDDFRQ1 operates continuously across a common-mode input range of −5V to 110V. This allows direct high-side sensing on 48V buses with negative transients and compatibility with legacy 12V systems. Its survival rating extends to −20V to 120V, protecting against load-dump and jump-start events without latch-up or damage.
Does the INA296B4QDDFRQ1 support bidirectional current measurement?
Yes, the INA296B4QDDFRQ1 supports true bidirectional current sensing through its dual reference inputs (REF1 and REF2). By setting REF1 = VS and REF2 = GND (or vice versa), the output centers at VS/2, enabling positive and negative VSENSE values to produce corresponding above- and below-midpoint output voltages - critical for BMS charge/discharge tracking.
What is the gain error specification for the INA296B4QDDFRQ1 over temperature?
The INA296B4QDDFRQ1 has a maximum gain error of ±0.1% at room temperature, with a drift of ±5ppm/°C over −40°C to +125°C. This translates to ±0.0625% additional error across the full temperature range, ensuring stable scaling for precision current measurements in automotive environments where thermal cycling is routine.
Can the INA296B4QDDFRQ1 be used in low-side current sensing configurations?
Yes, the INA296B4QDDFRQ1 is fully compatible with low-side sensing. Connect IN+ to the load side of the shunt and IN− to ground. Its rail-to-rail output (down to 8mV above GND) and 2.7V minimum supply allow seamless interface with 3.3V microcontrollers, while its 130dB CMRR rejects noise from shared ground paths in high-current chassis-mounted systems.
Is functional safety documentation available for the INA296B4QDDFRQ1?
Yes, Texas Instruments provides comprehensive functional safety documentation for the INA296B4QDDFRQ1, including FMEDA reports, FIT rate calculations, and diagnostic coverage analysis - all aligned with ISO 26262 ASIL-B requirements. These resources are accessible via TI's functional safety portal and support accelerated safety case development for automotive ECUs.
INA296B4QDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- 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:
- TSOT-23-8
INA296B4QDDFRQ1 FAQ
1.How can I place an order for INA296B4QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B4QDDFRQ1 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 INA296B4QDDFRQ1 reliable?
The price and inventory of INA296B4QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B4QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B4QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B4QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B4QDDFRQ1?
INA296B4QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B4QDDFRQ1 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 INA296B4QDDFRQ1?
For technical support, including INA296B4QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B4QDDFRQ1 requirements.
6.How does Aetrix verify that INA296B4QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B4QDDFRQ1 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 INA296B4QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B4QDDFRQ1?
All INA296B4QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B4QDDFRQ1, 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 INA296B4QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296B4QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296B4QDDFRQ1 Tags
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