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Texas Instruments INA296A4QDDFRQ1
- Part No.:
- INA296A4QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296A4QDDFRQ1.pdf
- Description:
- AEC-Q100 -5V TO 110V BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:3,782
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Product details
Overview
INA296A4QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 ultra-precise bidirectional current sense amplifier for automotive high-side/low-side shunt monitoring, featuring 100V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, 8V/µs slew rate, and ±10µV max input offset voltage - deployed in battery management systems and 48V DC/DC converters.
For engineers reviewing the INA296A4QDDFRQ1 datasheet, INA296A4QDDFRQ1 pinout, INA296A4QDDFRQ1 application, or INA296A4QDDFRQ1 equivalent, this page delivers verified specifications, SOT-23-8 package details, functional safety documentation support, and direct alternatives for high-voltage bidirectional current sensing in automotive power systems.
Technical Context
The INA296A4QDDFRQ1 uses a zero-drift precision topology enabling ±10µV max offset and ±0.015% max gain error across −40°C to +125°C, with CMRR of 166dB (typ) and input bias current stable at 35µA regardless of common-mode voltage up to 110V. Its reference-pin architecture supports configurable unidirectional or bidirectional output swing.
It operates from 2.7V–20V supply, draws 2.5mA quiescent current, and achieves 1µs settling time to 1% with fast transient response - optimized for overcurrent detection, fuel cell control, and smart junction box protection where signal integrity must be maintained across wide VCM and temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets output = 100 × (VIN+ − VIN−), enabling precise low-mV shunt voltage amplification for 10mΩ–100mΩ resistors. |
| Common-mode range | −5V to 110V - supports high-side sensing on 48V/60V/72V bus rails and negative rail monitoring without level-shifting. |
| Bandwidth | 1.1MHz - ensures accurate capture of fast transients (e.g., MOSFET switching edges, short-circuit rise times). |
| Input offset voltage | ±10µV max - enables sub-10mA current resolution with 100mΩ shunt at room temperature. |
| Slew rate | 8V/µs - maintains linearity during rapid load steps, critical for real-time overcurrent flag generation. |
| CMRR | 166dB - rejects noise from high-dv/dt power stages, preserving accuracy in noisy automotive ECU environments. |
| Supply range | 2.7V to 20V - compatible with 3.3V/5V logic domains while supporting wide-input DC/DC controllers. |
Pinout & Package
INA296A4QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive PCB layouts and thermally efficient high-density power modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense negative input | Connect to load side (high-side) or ground side (low-side); differential input with IN+ defines VSENSE. |
| GND (Pin 2) | Ground reference | Primary return path for internal circuitry and output stage; must be low-impedance connection to system GND. |
| REF2 (Pin 3) | Reference voltage input | Configures output offset; tied to VS/2 for bidirectional operation or GND for unidirectional high-side sensing. |
| NC (Pin 4) | No-connect terminal | Reserved pin; electrically isolated and must be connected to GND per datasheet recommendation. |
| OUT (Pin 5) | Analog output | Amplified, referenced output voltage; drives ADC inputs or comparator thresholds with rail-to-rail swing capability. |
| VS (Pin 6) | Power supply | 2.7V–20V supply input; bypass capacitor required between VS and GND for high-frequency stability. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to set output common-mode; identical function to REF2; both pins accept 0V–VS potentials. |
| IN+ (Pin 8) | Current-sense positive input | Connect to bus-voltage side (high-side) or load side (low-side); forms differential pair with IN− for VSENSE measurement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive powertrain and body electronics reliability requirements. |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system certification. |
| Bidirectional sensing capability | Output polarity reverses with current direction when REF1/REF2 are biased at mid-supply - enables regenerative braking current monitoring. |
| Survival voltage rating | Withstands −20V to +120V common-mode transients - protects against load dump, reverse battery, and inductive kick events. |
| Step response settling | 1µs to 1% - enables detection of <1µs overcurrent pulses in motor drive fault protection loops. |
| Input-referred voltage noise | 36nV/√Hz at 100kHz - preserves SNR in low-VSENSE applications using milliohm shunts under high EMI conditions. |
Applications
| High-Voltage DC/DC Converter Monitoring | Battery Management System (BMS) Cell Balancing |
|---|---|
|
Use Scenario: Real-time current measurement in 48V–60V buck-boost converters for ADAS domain controllers. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth capturing switching ripple and fault transients. Use Value: Enables cycle-by-cycle overcurrent shutdown and efficiency optimization via precise shunt-based power loss calculation. |
Use Scenario: Bidirectional pack current monitoring during charge/discharge cycles in 12S–16S EV battery packs. IC Role / Device Role / Timing Role: Precision analog front-end delivering ±10µV offset stability across −40°C to +85°C operating range. Use Value: Supports <±0.5% state-of-charge (SOC) estimation accuracy by minimizing cumulative integration error in coulomb counting. |
| Fuel Cell Control Unit Current Feedback | Smart Junction Box Load Protection |
|
Use Scenario: Anode/cathode current regulation in PEM fuel cell stacks requiring sub-100µV offset stability. IC Role / Device Role / Timing Role: Ultra-low-drift current sensor interfacing with isolated sigma-delta ADCs for galvanic isolation compliance. Use Value: Maintains <0.01% gain error drift over lifetime, ensuring consistent air/fuel stoichiometry control despite thermal cycling. |
Use Scenario: Individual branch current monitoring in 12V/48V vehicle electrical centers with programmable fuse emulation. IC Role / Device Role / Timing Role: Fast-settling (1µs) current amplifier feeding digital isolators and microcontroller ADCs for real-time load profiling. Use Value: Enables selective load shedding within 2µs of overcurrent event, preventing thermal runaway in multi-output power distribution units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage bidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDRQ1 | Same 100V/V gain, but ±120µV max offset and 400kHz bandwidth; no Grade 0 option. | Limited to lower-speed BMS and non-safety-critical loads due to reduced precision and bandwidth. | Select when cost sensitivity outweighs need for 1.1MHz transient response or <±10µV offset. |
| MAX40056ATA+T | 100V/V gain, −5V to 65V common-mode, 1.5MHz bandwidth, ±50µV offset; not AEC-Q100 qualified. | Restricted to industrial/commercial use; lacks automotive qualification and functional safety documentation. | Choose only for non-automotive designs requiring higher bandwidth but tolerating narrower VCM range and no ASIL support. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA296A4QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 1.1MHz bandwidth, ±10µV offset, and −5V to 110V common-mode operation - making it the only option qualified for safety-critical, high-dv/dt automotive current sensing where precision and speed are co-required.
Availability
INA296A4QDDFRQ1 is available at Aetrix Electronics and suitable for automotive battery management systems, 48V DC/DC converters, and smart junction box designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for Tier-1 production programs.
Supply support for INA296A4QDDFRQ1 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 deep expertise in automotive-grade signal conditioning and power management ICs.
The INA296x-Q1 product line was engineered specifically for AEC-Q100-compliant high-voltage bidirectional current sensing in next-generation automotive electrification systems - emphasizing precision, speed, and functional safety readiness.
FAQ
What is the maximum common-mode voltage the INA296A4QDDFRQ1 can withstand during normal operation?
The INA296A4QDDFRQ1 operates continuously across a common-mode input range of −5V to 110V. Its survival rating extends to −20V to 120V, allowing tolerance of automotive transients like load dump without damage. This enables direct high-side sensing on 48V, 60V, and 72V bus architectures without external level-shifting circuitry - a key advantage over conventional op-amp-based solutions.
Does the INA296A4QDDFRQ1 support bidirectional current measurement out of the box?
Yes, the INA296A4QDDFRQ1 supports true bidirectional current sensing when REF1 and REF2 are biased at VS/2, producing an output centered at VS/2 that swings above or below that point depending on current direction. No external components are needed - the internal reference divider architecture enables seamless reversal of output polarity with current flow, essential for regenerative braking and battery charge/discharge monitoring.
What package type is used for the INA296A4QDDFRQ1, and why is it suitable for automotive applications?
The INA296A4QDDFRQ1 uses the DDF (SOT-23-8) package: 2.9mm × 2.8mm, with thermal resistance RθJA = 129.7°C/W. Its small footprint saves PCB area in dense power modules, while its qualified construction meets automotive vibration, thermal cycling, and moisture resistance standards. The exposed pad variant (not used here) is available for enhanced thermal performance in high-power variants.
How does the INA296A4QDDFRQ1 achieve ±10µV maximum input offset voltage across temperature?
The INA296A4QDDFRQ1 employs a precision zero-drift chopper-stabilized architecture with auto-zeroing circuitry that actively cancels input-stage offset and drift. This results in ±10µV max offset at 25°C and ±0.1µV/°C drift over −40°C to +125°C - enabling accurate low-current measurements even with milliohm shunts in thermally aggressive engine bay or battery pack environments.
Is functional safety documentation available for the INA296A4QDDFRQ1?
Yes, Texas Instruments provides comprehensive functional safety documentation for the INA296A4QDDFRQ1, including FMEDA reports, FIT rate calculations (127 FIT), safety manual, and diagnostic coverage analysis - all aligned with ISO 26262 ASIL-B requirements. These materials are accessible through TI's functional safety portal and support system-level certification for automotive powertrain and chassis applications.
INA296A4QDDFRQ1 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:
- 3 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
INA296A4QDDFRQ1 FAQ
1.How can I place an order for INA296A4QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A4QDDFRQ1 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 INA296A4QDDFRQ1 reliable?
The price and inventory of INA296A4QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A4QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296A4QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A4QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296A4QDDFRQ1?
INA296A4QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A4QDDFRQ1 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 INA296A4QDDFRQ1?
For technical support, including INA296A4QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A4QDDFRQ1 requirements.
6.How does Aetrix verify that INA296A4QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296A4QDDFRQ1 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 INA296A4QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296A4QDDFRQ1?
All INA296A4QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A4QDDFRQ1, 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 INA296A4QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296A4QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A4QDDFRQ1 Tags
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