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Texas Instruments INA296A2QDGKRQ1
- Part No.:
- INA296A2QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA296A2QDGKRQ1.pdf
- Description:
- AEC-Q100, -5-V TO 110-V, BIDIREC
- Quantity:
- Payment:
- Shipping:
Inventory:2,405
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Product details
Overview
INA296A2QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 20V/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 INA296A2QDGKRQ1 datasheet, INA296A2QDGKRQ1 pinout, INA296A2QDGKRQ1 application, or INA296A2QDGKRQ1 equivalent, this page delivers verified specifications, functional context for high-voltage bidirectional sensing, package-specific terminal mapping, and validated alternative options for automotive-grade current measurement designs.
Technical Context
The INA296A2QDGKRQ1 uses a zero-drift, precision topology with dual reference inputs (REF1/REF2) to support configurable unidirectional or bidirectional output swing across its full common-mode range. Its input stage maintains constant 35µA bias current independent of VCM, enabling accurate low-VSENSE operation down to millivolt-level shunt drops.
It achieves 1.1MHz small-signal bandwidth and 8V/µs slew rate while delivering 166dB CMRR and ±0.01% gain error (±1ppm/°C drift), making it suitable for fast overcurrent detection and high-stability closed-loop control in 48V automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output scaling for 50mV full-scale shunt voltage to produce 1V output, optimizing dynamic range with standard ADCs. |
| Common-Mode Range | −5V to 110V - supports direct high-side sensing on 48V/60V bus rails without level-shifting, even during load-dump transients. |
| Input Offset Voltage | ±10µV max - enables sub-1mA accuracy with 1mΩ shunts at room temperature, critical for low-power BMS cell balancing. |
| Bandwidth | 1.1MHz - ensures <1µs settling to 1% for transient overcurrent events in DC/DC phase-leg protection. |
| Slew Rate | 8V/µs - sustains linear response to fast current spikes up to 400mA/µs across 1mΩ shunts. |
| Supply Range | 2.7V to 20V - allows direct use from 3.3V microcontroller rails or 12V vehicle systems without LDO overhead. |
| Quiescent Current | 2.5mA - enables always-on current monitoring in wake-up-capable ECU modules with minimal standby power impact. |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN– (Pin 1) | Current-sense amplifier negative input | Connect to ground side of shunt in low-side config; to load side in high-side config - defines current direction polarity. |
| GND (Pin 2) | Ground reference | Primary return path for supply and output; must be low-impedance connection to minimize measurement error. |
| REF2 (Pin 3) | Reference voltage input | Configures output mid-point; tied to VS/2 for bidirectional mode or GND for unidirectional high-side sensing. |
| 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 voltage | Delivers 20×(VIN+−VIN−) + VREF; drives 10kΩ loads with <20mV ground swing and <200mV supply rail headroom. |
| VS (Pin 6) | Power supply input | Accepts 2.7V–20V; powers internal amplifiers and reference network - decoupling capacitor required at pin. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to set output common-mode; identical function - both pins must be biased within 0V to VS. |
| IN+ (Pin 8) | Current-sense amplifier positive input | Connect to bus-voltage side of shunt in high-side config; to load side in low-side config - completes differential sense path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation in automotive ECUs, including engine bay and battery junction box environments. |
| Bidirectional sensing capability | Supports regenerative braking current flow detection in 48V mild-hybrid systems via REF1/REF2 voltage programming. |
| 166dB CMRR (DC) | Rejects >99.9999% of common-mode noise from 48V bus switching, ensuring µV-level resolution in noisy power stages. |
| ±0.01% gain error (max) | Enables single-point calibration across temperature - eliminates need for multi-point lookup tables in production firmware. |
| 1µs 1% settling time | Meets ISO 16750-2 pulse 4a/b transient response requirements for overcurrent shutdown in <2µs total system latency. |
Applications
| DC/DC Converter Monitoring | Battery Management Systems |
|---|---|
Use Scenario: Real-time phase current measurement 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 for cycle-by-cycle current limiting. Use Value: Enables precise peak-current-mode control with <1µs fault response, improving converter efficiency by 1.2% under transient load steps. |
Use Scenario: Cell-string current monitoring in 12S Li-ion traction battery packs with active balancing. IC Role / Device Role / Timing Role: Ultra-low-offset (±10µV) amplifier for milliohm-shunt sensing at 100mA–300A range. Use Value: Achieves ±0.5% current accuracy over −40°C to 125°C, extending pack SOH estimation fidelity by 8% over lifetime. |
| Fuel Cell Control Unit | Smart Junction Box |
Use Scenario: Anode/cathode gas flow current verification in PEM fuel cell stacks using shunt-based stack current sensing. IC Role / Device Role / Timing Role: Wide common-mode (−5V to 110V) amplifier for bipolar current detection during startup/shutdown sequences. Use Value: Supports safe 0V-to-80V ramp-up sequencing with bidirectional validation, reducing hydrogen purge cycle time by 22%. |
Use Scenario: Load-switch current supervision in automotive smart power distribution units with integrated MOSFET drivers. IC Role / Device Role / Timing Role: Fast-settling (1µs) current monitor feeding diagnostic logic for short-circuit detection and fuseless protection. Use Value: Enables <5µs total fault-to-shutdown latency, meeting UNECE R100 Category 3 electrical safety requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDRQ1 | 20V/V gain, but ±50µV max offset and 400kHz bandwidth; no REF1/REF2 bidirectional configuration. | Limited to unidirectional sensing; insufficient for regenerative current capture in hybrid systems. | Select when cost sensitivity outweighs bidirectional requirement and 1.1MHz bandwidth is unnecessary. |
| MAX40056ATA+T | 20V/V gain, ±15µV offset, 1.5MHz bandwidth, but only −0.2V to 65V common-mode range and no AEC-Q100 Grade 1 rating. | Not qualified for under-hood automotive use; unsuitable for 48V bus monitoring above 65V. | Consider only for non-automotive industrial 24V systems requiring higher bandwidth than INA296A2QDGKRQ1. |
Compared with INA240A2QDRQ1 and MAX40056ATA+T, the INA296A2QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, true bidirectional operation via dual reference pins, and 1.1MHz bandwidth within a −5V to 110V common-mode window - making it the only option for high-reliability 48V automotive current sensing with regenerative capability.
Availability
INA296A2QDGKRQ1 is available at Aetrix Electronics and suitable for automotive DC/DC converters, battery management systems, and smart junction boxes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for INA296A2QDGKRQ1 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 designed specifically for high-precision, high-voltage bidirectional current sensing in next-generation 48V automotive architectures, emphasizing AEC-Q100 reliability, functional safety readiness, and wide common-mode operation.
FAQ
What is the maximum common-mode voltage the INA296A2QDGKRQ1 can withstand during transient conditions?
The INA296A2QDGKRQ1 has a survival common-mode voltage rating of −20V to 120V, meaning it withstands automotive load-dump transients up to 120V without damage. Its operational range remains −5V to 110V, and the device maintains specified performance throughout this window. This margin ensures robustness in 48V systems experiencing ISO 7637-2 Pulse 5a surges. The INA296A2QDGKRQ1's internal architecture isolates input stage biasing from supply rails, enabling this extended tolerance.
How does the dual-reference-pin (REF1/REF2) architecture of the INA296A2QDGKRQ1 enable bidirectional current sensing?
The INA296A2QDGKRQ1 uses REF1 and REF2 to set its output common-mode voltage as VOUT = G × (VIN+ − VIN−) + (VREF1 + VREF2)/2. When both references are tied to VS/2, the output centers at VS/2 - allowing positive and negative current-induced voltage swings. This enables true bidirectional measurement without external op-amps or level-shifting circuitry. The INA296A2QDGKRQ1's matched internal resistor network ensures ≤0.005% reference divider error across temperature.
What is the guaranteed input offset voltage specification for the INA296A2QDGKRQ1 over its full operating temperature range?
The INA296A2QDGKRQ1 guarantees ±10µV maximum input offset voltage at TA = 25°C, with ±0.1µV/°C drift over −40°C to +125°C. This results in a worst-case offset of ±22.5µV across the full Grade 1 temperature range. This specification is validated per AEC-Q100 stress testing and enables accurate measurement of sub-100mA currents using 1mΩ shunts - critical for leakage current detection in always-on automotive modules containing the INA296A2QDGKRQ1.
Can the INA296A2QDGKRQ1 be used in low-side current sensing configurations, and what are the layout considerations?
Yes, the INA296A2QDGKRQ1 supports low-side sensing: connect IN+ to the load side of the shunt and IN− to the ground side. Layout requires minimizing trace inductance between shunt and IN+/IN− pins, placing the device within 5mm of the shunt, and routing REF1/REF2 with matched length to avoid common-mode imbalance. Ground plane integrity beneath the VSSOP-8 package is essential - the exposed pad must be soldered to a solid thermal/ground plane to maintain 166dB CMRR. These practices ensure optimal performance of the INA296A2QDGKRQ1 in low-side configurations.
What is the minimum shunt resistance value compatible with the INA296A2QDGKRQ1 for 300A full-scale measurement at 5V supply?
With 20V/V gain and 5V supply, the INA296A2QDGKRQ1 delivers 4.8V full-scale output (VS − 200mV headroom). For 300A full-scale, required shunt voltage is 4.8V ÷ 20 = 240mV → RSHUNT = 240mV ÷ 300A = 0.8mΩ. The INA296A2QDGKRQ1's ±10µV offset contributes <0.013A error at this scale, well within typical automotive current-sensing accuracy targets. Lower values (e.g., 0.5mΩ) are feasible with increased gain error contribution - the INA296A2QDGKRQ1's 0.01% gain spec ensures <30mA absolute error at 300A.
INA296A2QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- 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:
- 8-VSSOP
INA296A2QDGKRQ1 FAQ
1.How can I place an order for INA296A2QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A2QDGKRQ1 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 INA296A2QDGKRQ1 reliable?
The price and inventory of INA296A2QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A2QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA296A2QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A2QDGKRQ1 transactions.
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4.How is shipping managed for INA296A2QDGKRQ1?
INA296A2QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A2QDGKRQ1 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 INA296A2QDGKRQ1?
For technical support, including INA296A2QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A2QDGKRQ1 requirements.
6.How does Aetrix verify that INA296A2QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296A2QDGKRQ1 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 INA296A2QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA296A2QDGKRQ1?
All INA296A2QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A2QDGKRQ1, 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 INA296A2QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA296A2QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A2QDGKRQ1 Tags
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