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Texas Instruments INA296A3QDDFRQ1
- Part No.:
- INA296A3QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296A3QDDFRQ1.pdf
- Description:
- AEC-Q100 -5V TO 110V BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:1,936
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Product details
Overview
INA296A3QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 50V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and ±10µV max input offset voltage. It enables high-accuracy shunt-based current monitoring in automotive high-side DC/DC converters and battery management systems.
For engineers reviewing the INA296A3QDDFRQ1 datasheet, INA296A3QDDFRQ1 pinout, INA296A3QDDFRQ1 application, or INA296A3QDDFRQ1 equivalent, this page delivers verified specifications, validated SOT-23-8 pin functions, automotive-grade thermal and ESD performance data, and real-world implementation guidance for high-voltage bidirectional sensing.
Technical Context
The INA296A3QDDFRQ1 employs a zero-drift precision topology with dual reference inputs (REF1/REF2) enabling configurable unidirectional or bidirectional output swing relative to supply rails. Its input stage operates independently of VS, supporting common-mode voltages beyond the 2.7V–20V supply range.
It achieves 166dB DC CMRR and maintains 1.1MHz small-signal bandwidth across all gains via multistage architecture. Input bias current remains constant at 35µA (typ) over −20V to 120V survival range, decoupling leakage from VCM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets output = 50 × (VIN+ − VIN−), optimizing dynamic range for 20mΩ–100mΩ shunts in 48V systems |
| Input Offset Voltage | ±10µV max - enables accurate sub-1A current measurement with ≤0.1% error at 25°C |
| Common-Mode Range | −5V to 110V - supports direct high-side sensing on 48V/60V bus without level-shifting or isolation |
| Bandwidth | 1.1MHz - detects fast overcurrent transients (e.g., MOSFET short-circuit) within 1µs settling time to 1% |
| Slew Rate | 8V/µs - sustains linear response during rapid load-step events in DC/DC control loops |
| CMRR | 166dB - rejects noise from switching nodes in buck/boost converters operating near 100kHz–2MHz |
| Supply Range | 2.7V to 20V - compatible with 3.3V/5V/12V logic domains while sensing up to 110V bus |
Pinout & Package
INA296A3QDDFRQ1 uses the DDF (SOT-23-8) package: 2.9mm × 2.8mm, 8-pin surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense negative input | Connect to load side (high-side) or ground side (low-side); defines differential sense node with IN+ |
| GND (Pin 2) | Power ground reference | Return path for quiescent current (2.5mA); must be low-impedance connection to system GND plane |
| REF2 (Pin 3) | Reference voltage input | Configures output center point; tie to VS/2 for bidirectional operation or GND for unidirectional |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be connected to GND per datasheet to ensure stability |
| OUT (Pin 5) | Analog output voltage | Delivers 50×VSENSE + reference offset; rail-to-rail swing (VS − 0.2V min, 20mV above GND) |
| VS (Pin 6) | Positive power supply | Accepts 2.7V–20V; powers internal amplifiers and reference network; bypass with 1µF ceramic |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to set output baseline; identical function-no functional difference between REF1/REF2 |
| IN+ (Pin 8) | Current-sense positive input | Connect to bus-voltage side (high-side) or load side (low-side); forms differential pair with IN− |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation in automotive ECUs, ensuring reliability under engine-bay thermal stress |
| Bidirectional sensing capability | Output polarity reverses with current direction when REF1/REF2 are biased at VS/2, enabling regenerative braking monitoring |
| Zero-drift input architecture | ±0.1µV/°C offset drift ensures <±2µV total drift over full temperature range-critical for BMS state-of-charge accuracy |
| Survival voltage rating | Withstands −20V to +120V transient common-mode stress (e.g., load dump, jump-start), preventing latch-up or damage |
| Functional safety documentation support | TI provides FIT rate, failure mode analysis, and diagnostic coverage reports to accelerate ISO 26262 ASIL-B system certification |
Applications
| DC/DC Converter Monitoring | Battery Management Systems |
|---|---|
|
Use Scenario: Real-time phase-current sensing in 48V–60V automotive buck converters supplying ADAS domain controllers. IC Role / Device Role / Timing Role: High-side current sense amplifier providing isolated analog feedback to PWM controller with <1µs transient response. Use Value: Enables cycle-by-cycle overcurrent protection and precise efficiency optimization via accurate loss calculation across 0.5A–200A range. |
Use Scenario: Cell-string current monitoring in 12S–16S EV traction battery packs during charge/discharge and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier interfacing to isolated ADC, delivering ±100A measurement with <0.2% gain error. Use Value: Supports Coulomb counting with <±0.5% SoC error over lifetime by maintaining ±10µV offset stability across temperature. |
| Fuel Cell Control Unit | Smart Junction Box |
|
Use Scenario: Anode/cathode stack current measurement in PEM fuel cell systems requiring high common-mode rejection of switching ripple. IC Role / Device Role / Timing Role: Precision current sensor rejecting >166dB of common-mode noise from 20kHz–100kHz DC/DC stages feeding fuel cell stacks. Use Value: Eliminates need for external filtering or isolation, reducing BOM cost and PCB area while meeting IEC 62282-3 immunity requirements. |
Use Scenario: Load-current supervision in vehicle smart junction boxes managing 12V/48V distribution to lighting, HVAC, and infotainment modules. IC Role / Device Role / Timing Role: High-speed current monitor triggering hardware fault interrupts within 1µs of overcurrent event detection. Use Value: Enables fail-safe load disconnection before wire temperature exceeds UL 94 V-0 limits, satisfying ISO 16750-2 short-circuit protection mandates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDRQ1 | Same 50V/V gain, but ±100µV max offset (vs. ±10µV), 400kHz bandwidth (vs. 1.1MHz), and no REF1/REF2 bidirectional configuration | Limited to unidirectional sensing; insufficient for regenerative braking or fuel cell bidirectional control | Select INA296A3QDDFRQ1 when <±10µV offset, 1.1MHz bandwidth, or programmable bidirectional output is required |
| MAX40056ATA+T | 50V/V gain, ±12µV offset, but only −0.2V to 65V common-mode range (vs. −5V to 110V) and no AEC-Q100 qualification | Not qualified for automotive under-hood use; unsuitable for 48V+ bus monitoring or ASIL-B systems | Select INA296A3QDDFRQ1 for AEC-Q100 Grade 1 compliance, extended common-mode range, and functional safety documentation |
Compared with INA240A3QDRQ1 and MAX40056ATA+T, the INA296A3QDDFRQ1 uniquely combines automotive qualification, ultra-low offset, 1.1MHz bandwidth, and flexible bidirectional output-enabling single-device solutions for high-reliability 48V–60V automotive current sensing where precision, speed, and safety certification are non-negotiable.
Availability
INA296A3QDDFRQ1 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 support, and AEC-Q100-compliant traceability.
Supply support for INA296A3QDDFRQ1 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 rigorous AEC-Q100 validation infrastructure.
The INA296x-Q1 product line was engineered specifically for high-precision, high-voltage bidirectional current sensing in next-generation 48V mild-hybrid and electric vehicle architectures, emphasizing zero-drift stability, wide common-mode tolerance, and functional safety readiness.
FAQ
What is the maximum common-mode voltage the INA296A3QDDFRQ1 can withstand during normal operation?
The INA296A3QDDFRQ1 operates continuously over a common-mode input range of −5V to 110V. This allows direct high-side sensing on 48V, 60V, and even 72V automotive buses without external level-shifting circuitry. The device also survives transient conditions from −20V to 120V, covering load-dump and jump-start scenarios defined in ISO 16750-2.
How does the REF1 and REF2 pin configuration affect bidirectional operation of the INA296A3QDDFRQ1?
Connecting both REF1 and REF2 to VS/2 configures the INA296A3QDDFRQ1 for true bidirectional output: positive current yields OUT > VS/2, negative current yields OUT < VS/2. This enables regenerative current monitoring in BMS and fuel cell systems. The pins are functionally identical-no internal distinction exists between REF1 and REF2 per the datasheet.
Is the INA296A3QDDFRQ1 pin-compatible with other members of the INA296x-Q1 family?
Yes-the INA296A3QDDFRQ1 shares identical pinout and package (DDF/SOT-23-8) with all other INA296x-Q1 variants (A1–A5, B1–B5). This allows drop-in replacement across gain options (10V/V to 200V/V) without PCB layout changes, simplifying design reuse and gain optimization during prototyping or production ramp.
What is the typical quiescent current consumption of the INA296A3QDDFRQ1, and how does it vary with supply voltage?
The INA296A3QDDFRQ1 draws 2.5mA typical quiescent current at 25°C. Over the full 2.7V–20V supply range, IQ remains stable at 2.5–3.0mA (max 3.2mA at −40°C to +125°C), making it suitable for always-on automotive modules where standby power budget is constrained to <15mW.
Does the INA296A3QDDFRQ1 require external compensation components for stability?
No-internal compensation eliminates the need for external capacitors or resistors. The device is stable driving up to 1nF capacitive loads directly, supporting direct connection to SAR ADC inputs or op-amp buffers without added phase margin risk. A 1µF ceramic bypass capacitor on VS is mandatory per layout guidelines.
INA296A3QDDFRQ1 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
INA296A3QDDFRQ1 FAQ
1.How can I place an order for INA296A3QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A3QDDFRQ1 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 INA296A3QDDFRQ1 reliable?
The price and inventory of INA296A3QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A3QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296A3QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A3QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296A3QDDFRQ1?
INA296A3QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A3QDDFRQ1 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 INA296A3QDDFRQ1?
For technical support, including INA296A3QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A3QDDFRQ1 requirements.
6.How does Aetrix verify that INA296A3QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296A3QDDFRQ1 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 INA296A3QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296A3QDDFRQ1?
All INA296A3QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A3QDDFRQ1, 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 INA296A3QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296A3QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A3QDDFRQ1 Tags
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