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Texas Instruments INA296B1QDDFRQ1
- Part No.:
- INA296B1QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296B1QDDFRQ1.pdf
- Description:
- AEC-Q100 -5V TO 110V BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:2,452
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Product details
Overview
INA296B1QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with ±0.1% max gain error, ±150µV max input offset voltage, and 1.1MHz bandwidth across its 10V/V fixed gain. It operates from −5V to 110V common-mode voltage and 2.7V to 20V supply, enabling high-precision shunt-based current monitoring in high-voltage DC/DC converters and battery management systems.
For engineers reviewing the INA296B1QDDFRQ1 datasheet, INA296B1QDDFRQ1 pinout, INA296B1QDDFRQ1 application, or INA296B1QDDFRQ1 equivalent, this page delivers verified specifications, SOT-23-8 package details, functional safety documentation support, and validated alternatives for automotive-grade current sensing designs requiring <1µs settling time and 166dB CMRR.
Technical Context
The INA296B1QDDFRQ1 uses a zero-drift, precision topology optimized for bidirectional current measurement in high-common-mode environments. Its input stage maintains constant 35µA bias current across −5V to 110V VCM, independent of supply voltage, enabling accurate low-side, high-side, and inline sensing without signal degradation.
It features dual reference inputs (REF1/REF2) that configure output offset for unidirectional or bidirectional operation, and supports fast transient detection via 8V/µs slew rate and 1µs 1% settling time-critical for overcurrent protection in 48V automotive subsystems and BMS cell balancing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 10V/V - Fixed, factory-trimmed ratio enabling direct scaling of shunt voltage to measurable output without external gain stages. |
| Common-mode range | −5V to 110V - Supports operation beyond supply rails, allowing direct sensing on 48V/60V/80V bus lines without level-shifting circuitry. |
| Bandwidth | 1.1MHz - Enables real-time detection of fast transients (e.g., short-circuit events) in power converters and motor drives. |
| Input offset voltage | ±150µV max - Ensures sub-milliohm shunt accuracy at room temperature, critical for low-current battery monitoring. |
| CMRR | 130dB min (166dB typ) - Rejects noise from high-dv/dt switching nodes, preserving signal integrity in noisy automotive ECU environments. |
| Slew rate | 8V/µs - Delivers rapid output response to step changes in sensed current, supporting <1µs overcurrent fault response. |
| Supply range | 2.7V to 20V - Compatible with 3.3V/5V/12V control domains while maintaining full performance across automotive battery voltage variations. |
Pinout & Package
INA296B1QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) footprint measuring 2.9mm × 2.8mm, optimized for space-constrained automotive modules and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN– (Pin 1) | Current-sense negative input | Connects to load side (high-side) or ground side (low-side) of shunt; differential input pair enables bidirectional current polarity detection. |
| GND (Pin 2) | Ground reference | System ground return path; must be low-impedance to preserve CMRR and minimize offset drift. |
| REF2 (Pin 3) | Reference voltage input | Configures output DC offset; tied with REF1 to set bidirectional zero point (e.g., VS/2 for ±VOUT operation). |
| NC (Pin 4) | No-connect terminal | Reserved internal node; must be connected to GND per datasheet to ensure stability and ESD robustness. |
| OUT (Pin 5) | Analog output | Amplified, buffered current-sense voltage; rail-to-rail capable with 20mV headroom to GND and 200mV to VS. |
| VS (Pin 6) | Power supply | 2.7V–20V analog supply; powers internal amplifiers and reference network; decoupling capacitor required at pin. |
| REF1 (Pin 7) | Reference voltage input | Dual with REF2; forms programmable output offset divider; accepts 0V to VS potential for flexible unidirectional/bidirectional configuration. |
| IN+ (Pin 8) | Current-sense positive input | Connects to bus-voltage side (high-side) or load side (low-side) of shunt; complements IN– for differential sensing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation, meeting automotive reliability and stress-test requirements for engine control and ADAS modules. |
| Bidirectional sensing capability | Supports both charge and discharge current monitoring in BMS and smart junction boxes using single-shunt architecture. |
| Functional safety documentation | TI provides FIT rate data, 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, protecting against load dump and reverse-battery conditions in 12V/48V systems. |
| Low input bias current | 35µA typical per input, constant across full VCM range-minimizes shunt error and enables use with high-value shunts in low-power applications. |
Applications
| DC/DC Converter Monitoring | Battery Management Systems |
|---|---|
|
Use Scenario: Real-time current feedback in 48V–12V buck converters for mild-hybrid vehicles. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth and 1µs settling time for cycle-by-cycle overcurrent protection. Use Value: Enables precise peak-current-mode control and fast fault shutdown (<2µs), improving converter efficiency and preventing MOSFET failure during short-circuit events. |
Use Scenario: Cell-level current monitoring in EV traction battery packs with 800V nominal bus voltage. IC Role / Device Role / Timing Role: Low-offset, high-CMRR amplifier interfacing with milliohm shunts to detect charge/discharge imbalance across parallel modules. Use Value: ±150µV offset ensures <±10mA error at 10mΩ shunt, directly supporting SOC/SOH estimation accuracy within ±0.5%. |
| Fuel Cell Control Unit | Smart Junction Box |
|
Use Scenario: Anode/cathode stack current regulation in PEM fuel cell systems operating at −5V to 60V common-mode. IC Role / Device Role / Timing Role: Bidirectional current sensor with −5V to 110V VCM tolerance and functional safety documentation for ASIL-B compliance. Use Value: Survives reverse-polarity startup and hydrogen purge transients while delivering stable 10V/V gain for closed-loop air/fuel stoichiometry control. |
Use Scenario: Load current supervision in automotive domain controllers managing 12V/48V fused outputs. IC Role / Device Role / Timing Role: High-speed current monitor feeding microcontroller ADC with 8V/µs slew rate and 1.1MHz bandwidth for dynamic load profiling. Use Value: Detects incipient wire degradation or connector fretting via sub-100ms current signature analysis, enabling predictive maintenance alerts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Lower bandwidth (400kHz), higher offset (±100µV), same 10V/V gain and SOT-23-8 package. | Targeted at cost-sensitive, non-safety-critical 12V systems where <1µs response is not required. | Select when functional safety documentation and 1.1MHz bandwidth are unnecessary; offers lower quiescent current (2.4mA vs 2.5mA). |
| MAX40056ATA+T | Higher bandwidth (2.5MHz), wider VCM (−100V to +65V), but no AEC-Q100 qualification and larger 8-pin TDFN package. | Used in industrial test equipment and server PSUs-not qualified for automotive deployment. | Choose only for non-automotive, high-speed lab or telecom applications; lacks automotive temperature grade and safety documentation. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA296B1QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 1.1MHz bandwidth, and functional safety support-making it the only option for ASIL-B-compliant, high-dv/dt automotive current sensing where timing-critical fault response is mandatory.
Availability
INA296B1QDDFRQ1 is available at Aetrix Electronics and suitable for automotive power conversion, battery management, and smart junction box applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for INA296B1QDDFRQ1 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 IC design expertise and broad AEC-Q100 product portfolio.
The INA296x-Q1 family was developed specifically for high-precision, high-speed current sensing in next-generation 48V mild-hybrid and electric vehicle architectures-emphasizing functional safety readiness, wide common-mode operation, and zero-drift stability.
FAQ
What is the maximum common-mode voltage the INA296B1QDDFRQ1 can withstand during normal operation?
The INA296B1QDDFRQ1 operates continuously across a common-mode input range of −5V to +110V. This allows direct connection to high-voltage buses such as 48V, 60V, or 80V automotive systems without external attenuation or level-shifting circuitry. Its survival rating extends to −20V to +120V, covering load-dump and reverse-battery transients.
Does the INA296B1QDDFRQ1 support bidirectional current sensing, and how is polarity determined?
Yes, the INA296B1QDDFRQ1 supports true bidirectional current sensing. Polarity is determined by the relative voltage between IN+ and IN−: when IN+ > IN−, the output rises above the configured reference midpoint (e.g., VS/2); when IN+ < IN−, the output falls below that midpoint. REF1 and REF2 pins set the zero-current output level.
What is the guaranteed gain error specification for the INA296B1QDDFRQ1 over temperature?
The INA296B1QDDFRQ1 has a maximum gain error of ±0.1% at room temperature and ±0.1% over the full −40°C to +125°C operating range, with a drift of ±5ppm/°C. This is confirmed in the datasheet's Electrical Characteristics table under "Gain Error Drift" for INA296B-Q1 devices.
Can the INA296B1QDDFRQ1 be used in low-side current sensing configurations?
Yes, the INA296B1QDDFRQ1 supports low-side, high-side, and inline current sensing. For low-side use, connect IN+ to the load side of the shunt and IN− to ground. Its −5V to +110V common-mode range accommodates ground-referenced measurements while maintaining excellent CMRR and low offset.
Is functional safety documentation available for the INA296B1QDDFRQ1, and what does it include?
Yes, Texas Instruments provides functional safety documentation for the INA296B1QDDFRQ1, including FIT rate data, failure mode effects and diagnostic analysis (FMEDA), and safety manual guidance. These materials support ISO 26262 ASIL-B system-level development and are accessible through TI's functional safety resource center.
INA296B1QDDFRQ1 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:
- 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:
- TSOT-23-8
INA296B1QDDFRQ1 FAQ
1.How can I place an order for INA296B1QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B1QDDFRQ1 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 INA296B1QDDFRQ1 reliable?
The price and inventory of INA296B1QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B1QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B1QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B1QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B1QDDFRQ1?
INA296B1QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B1QDDFRQ1 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 INA296B1QDDFRQ1?
For technical support, including INA296B1QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B1QDDFRQ1 requirements.
6.How does Aetrix verify that INA296B1QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B1QDDFRQ1 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 INA296B1QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B1QDDFRQ1?
All INA296B1QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B1QDDFRQ1, 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 INA296B1QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296B1QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296B1QDDFRQ1 Tags
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