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Texas Instruments INA296A1QDDFRQ1

Name: INA296A1QDDFRQ1
Brand: Texas Instruments
SKU: INA296A1QDDFRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: INA296A1QDDFRQ1

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: SOT-23-8 Thin, TSOT-23-8

Datasheet:: INA296A1QDDFRQ1.pdf

Description:: AEC-Q100, -5-V TO 110-V, BIDIREC

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Product details

Overview

INA296A1QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 10V/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 INA296A1QDDFRQ1 datasheet, INA296A1QDDFRQ1 pinout, INA296A1QDDFRQ1 application, or INA296A1QDDFRQ1 equivalent, this page delivers verified specifications, functional context for high-voltage bidirectional sensing, package-specific pin definitions, and validated alternative options for automotive-grade current measurement.

Technical Context

The INA296A1QDDFRQ1 employs a zero-drift, precision topology optimized for bidirectional current sensing across −5V to 110V common-mode voltages-exceeding its 2.7V–20V supply rails. Its architecture delivers constant 35µA input bias current independent of V_CM, enabling low-leakage measurements in high-impedance shunt configurations.

It achieves 1.1MHz small-signal bandwidth and 8V/µs slew rate across all gains, with 1µs settling time to 1% and 166dB DC CMRR. The dual reference inputs (REF1/REF2) allow configurable unidirectional or bidirectional output offset without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	10V/V - fixed ratio enabling direct scaling of shunt voltage to measurable output (e.g., 100mV across shunt → 1V output).
Common-mode range	−5V to 110V - supports high-side, low-side, and inline sensing beyond supply rail, critical for 48V/60V automotive bus monitoring.
Input offset voltage	±10µV max - ensures sub-milliamp accuracy with 100µΩ shunts at room temperature.
Bandwidth	1.1MHz - enables detection of fast overcurrent transients (e.g., short-circuit events in <1µs).
CMRR	166dB - rejects noise from high-dv/dt switching nodes (e.g., MOSFET gate drivers) in DC/DC converters.
Supply voltage	2.7V to 20V - compatible with 3.3V, 5V, and 12V system rails while maintaining full common-mode operation.
Quiescent current	2.5mA - low power consumption suitable for always-on BMS monitoring circuits.

Pinout & Package

SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for automotive under-hood environments.

Pin/Terminal	Circuit Role	Design Meaning
IN−	Negative current-sense input	Connects to load side (high-side) or ground side (low-side) of shunt; differential input with IN+ defines V_SENSE.
GND	Ground reference	System ground return path for internal circuitry and output stage; must be low-impedance.
REF2	Reference voltage input	Configures output offset; tied to VS/2 for bidirectional operation or GND for unidirectional high-side sensing.
NC	No-connect terminal	Reserved pin; must be connected to GND per datasheet to ensure stability and EMI performance.
OUT	Analog output	Single-ended voltage output proportional to I_LOAD × gain; drives 10kΩ minimum load to GND or VS.
VS	Power supply	2.7V–20V analog supply; powers internal amplifiers and reference network; decoupling capacitor required.
REF1	Reference voltage input	Second reference input; identical function to REF2; used jointly to set output center point (e.g., VS/2 for ±V_OUT).
IN+	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
AEC-Q100 Grade 1 qualification	Validated for −40°C to +125°C ambient operation-meets automotive powertrain and chassis system reliability requirements.
Bidirectional sensing capability	Supports forward/reverse current flow via REF1/REF2 configuration-enables regenerative braking current monitoring in EV inverters.
166dB CMRR	Rejects >99.99999% of common-mode noise-critical for accurate sensing near high-frequency switching nodes in 48V DC/DC modules.
1.1MHz bandwidth at 10V/V gain	Preserves signal integrity for transient detection up to ~170kHz fundamental frequency-sufficient for fast overcurrent protection in SiC-based converters.
±10µV max input offset	Enables <±1mA error with 10mΩ shunt at 25°C-supports precise cell-level current tracking in multi-string BMS architectures.
Survival voltage rating	Withstands −20V to +120V common-mode transients-protects against load dump and jump-start events in 12V/48V vehicle networks.

Applications

High-Side DC/DC Converter Monitoring	Battery Management System (BMS)
Use Scenario: Real-time current measurement on the high-side input of a 48V buck converter supplying ADAS ECUs. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier measuring V_SENSE across 500µΩ shunt, with REF1/REF2 biased to VS/2 for ±2V output swing. Use Value: Enables cycle-by-cycle overcurrent shutdown within 1µs, preventing MOSFET failure during short-circuit faults.	Use Scenario: Cell-string current monitoring in a 12S lithium-ion traction battery pack with active balancing. IC Role / Device Role / Timing Role: High-precision shunt amplifier interfaced to 16-bit SAR ADC, operating at 10ksps sampling rate. Use Value: Achieves ±0.5% full-scale current accuracy over −40°C to 125°C, supporting SOC/SOH estimation algorithms.
Fuel Cell Control Unit	Smart Junction Box
Use Scenario: Anode/cathode stack current monitoring in PEM fuel cell stacks with variable 20–80V output. IC Role / Device Role / Timing Role: Bidirectional amplifier with −5V to 110V common-mode range, referenced to isolated 5V supply. Use Value: Maintains <±2mA accuracy despite 60V common-mode ripple, ensuring stable oxygen/hydrogen stoichiometry control.	Use Scenario: Load current supervision for 12V distribution fuses in next-gen vehicle electrical centers. IC Role / Device Role / Timing Role: Low-offset amplifier feeding isolated sigma-delta modulator for galvanically separated current telemetry. Use Value: Detects incipient fuse degradation via <1% drift in baseline current signature over 10,000-hour lifetime.

High-Side DC/DC Converter Monitoring

Battery Management System (BMS)

Use Scenario: Real-time current measurement on the high-side input of a 48V buck converter supplying ADAS ECUs.

IC Role / Device Role / Timing Role: Bidirectional current sense amplifier measuring V_SENSE across 500µΩ shunt, with REF1/REF2 biased to VS/2 for ±2V output swing.

Use Value: Enables cycle-by-cycle overcurrent shutdown within 1µs, preventing MOSFET failure during short-circuit faults.

Use Scenario: Cell-string current monitoring in a 12S lithium-ion traction battery pack with active balancing.

IC Role / Device Role / Timing Role: High-precision shunt amplifier interfaced to 16-bit SAR ADC, operating at 10ksps sampling rate.

Use Value: Achieves ±0.5% full-scale current accuracy over −40°C to 125°C, supporting SOC/SOH estimation algorithms.

Fuel Cell Control Unit

Smart Junction Box

Use Scenario: Anode/cathode stack current monitoring in PEM fuel cell stacks with variable 20–80V output.

IC Role / Device Role / Timing Role: Bidirectional amplifier with −5V to 110V common-mode range, referenced to isolated 5V supply.

Use Value: Maintains <±2mA accuracy despite 60V common-mode ripple, ensuring stable oxygen/hydrogen stoichiometry control.

Use Scenario: Load current supervision for 12V distribution fuses in next-gen vehicle electrical centers.

IC Role / Device Role / Timing Role: Low-offset amplifier feeding isolated sigma-delta modulator for galvanically separated current telemetry.

Use Value: Detects incipient fuse degradation via <1% drift in baseline current signature over 10,000-hour lifetime.

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 (±50µV), same 10V/V gain and −4V to 80V common-mode range.	Not rated for >80V bus applications; unsuitable for 48V+ high-side monitoring where V_CM exceeds 80V.	Select when cost sensitivity outweighs need for 1.1MHz response or sub-10µV offset in non-safety-critical zones.
MAX40056ATA+T	Wider common-mode (−5V to 110V), same 10V/V gain, but lower CMRR (130dB) and no AEC-Q100 qualification.	Lacks automotive qualification and fails functional safety documentation support required for ASIL-B systems.	Consider only for industrial or commercial 48V systems lacking ISO 26262 compliance mandates.

Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA296A1QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 1.1MHz bandwidth, and ±10µV offset in SOT-23-8-making it the only option for ASIL-B-compliant, high-speed, high-voltage bidirectional sensing in space-constrained automotive modules.

Availability

INA296A1QDDFRQ1 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 and high-reliability operational life.

Supply support for INA296A1QDDFRQ1 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 delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.

The INA296x-Q1 product line was designed specifically for ultra-precise, high-bandwidth, bidirectional current sensing in AEC-Q100-compliant automotive subsystems-including 48V mild-hybrid powertrains and ISO 26262 functional safety architectures.

FAQ

What is the maximum common-mode voltage the INA296A1QDDFRQ1 can withstand during normal operation?

The INA296A1QDDFRQ1 operates continuously across a common-mode input range of −5V to 110V. This allows direct connection to 48V, 60V, or 96V automotive buses without level-shifting circuitry. Its survival rating extends to −20V to 120V, covering load-dump transients per ISO 7637-2 Pulse 5a. The device maintains specified accuracy throughout the full −5V to 110V range at temperatures from −40°C to 125°C.

Does the INA296A1QDDFRQ1 support bidirectional current sensing, and how is it configured?

Yes, the INA296A1QDDFRQ1 supports true bidirectional current sensing. Configuration is achieved by applying complementary reference voltages to REF1 and REF2 pins-for example, tying REF1 to VS and REF2 to GND sets the output midpoint at VS/2, enabling symmetric ±V_OUT swing around that center. This eliminates the need for external op-amps or level-shifters in regenerative braking or battery charge/discharge monitoring.

What is the typical input bias current of the INA296A1QDDFRQ1, and why does it matter for shunt selection?

The INA296A1QDDFRQ1 draws 35µA (typical) input bias current per input pin, and this value remains constant across the full −5V to 110V common-mode range. Unlike conventional amplifiers, its bias current does not scale with V_CM, minimizing measurement error in high-value shunts (e.g., 5mΩ–50mΩ). This enables accurate low-current detection (<100mA) without offset correction firmware or calibration routines.

Can the INA296A1QDDFRQ1 be used in a low-side current sensing configuration?

Yes, the INA296A1QDDFRQ1 supports low-side sensing: connect IN+ to the load side of the shunt and IN− to the ground side. Its rail-to-rail output stage swings within 20mV of GND and 200mV below VS, allowing full-scale output even with low supply voltages (e.g., 3.3V). However, its −5V to 110V common-mode range is over-specified for low-side use-this headroom ensures immunity to ground bounce and PCB layout-induced noise.

What packaging options are available for the INA296A1QDDFRQ1, and which one is used in this part number?

The INA296A1QDDFRQ1 is exclusively offered in the DDF (SOT-23-8) package: 2.9mm × 2.8mm footprint with thermal pad for enhanced heat dissipation. Other variants like INA296A1QDGKRQ1 use DGK (VSSOP-8), and INA296A1QDRQ1 uses D (SOIC-8). The "DDFRQ1" suffix explicitly denotes the SOT-23-8 variant qualified for automotive Grade 1 operation.

INA296A1QDDFRQ1 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:: 5 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

INA296A1QDDFRQ1 FAQ

1.How can I place an order for INA296A1QDDFRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for INA296A1QDDFRQ1 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 INA296A1QDDFRQ1 reliable?

The price and inventory of INA296A1QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A1QDDFRQ1 is usually 5 days.

3.What payment methods are accepted for INA296A1QDDFRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A1QDDFRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for INA296A1QDDFRQ1?

INA296A1QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your INA296A1QDDFRQ1 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 INA296A1QDDFRQ1?

For technical support, including INA296A1QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A1QDDFRQ1 requirements.

6.How does Aetrix verify that INA296A1QDDFRQ1 is sourced from the original manufacturer or authorized distributors?

All INA296A1QDDFRQ1 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 INA296A1QDDFRQ1 meets industry standards.

7.What is the process for return or replacement of INA296A1QDDFRQ1?

All INA296A1QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A1QDDFRQ1, 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 INA296A1QDDFRQ1 part is unused and in its original packaging.

Return procedure for INA296A1QDDFRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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