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Texas Instruments INA296B4QDRQ1
- Part No.:
- INA296B4QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA296B4QDRQ1.pdf
- Description:
- AEC-Q100, -5V TO 110V, BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA296B4QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with 100V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and ±0.1% maximum gain error. It enables high-precision shunt-based current monitoring in high-voltage DC/DC converters and battery management systems.
For engineers reviewing the INA296B4QDRQ1 datasheet, INA296B4QDRQ1 pinout, INA296B4QDRQ1 application, or INA296B4QDRQ1 equivalent, key selection criteria include its 100V/V gain accuracy over −40°C to 125°C, 8V/µs slew rate for fast overcurrent detection, and dual reference inputs (REF1/REF2) enabling configurable unidirectional or bidirectional output offset.
Technical Context
The INA296B4QDRQ1 uses a zero-drift, precision topology optimized for bidirectional sensing across wide common-mode voltages. Its input stage operates independently of supply voltage, supporting high-side, low-side, and inline configurations without level-shifting circuitry.
It delivers 1.1MHz small-signal bandwidth and 1µs settling time to 1% at all gains, with CMRR of 120–130dB (typical 130dB) and input bias current stable at 25–45µA across −20V to 120V common-mode range - critical for low-leakage, high-accuracy BMS and junction box monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets output scaling for 10mV shunt drop → 1V output; enables use with low-value shunts while preserving SNR. |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/60V/72V bus rails without external level shifters. |
| Bandwidth | 1.1MHz - ensures accurate capture of transient current events (e.g., motor startup, short-circuit rise times). |
| Gain error | ±0.1% max - limits full-scale measurement error to ≤1mA per 1A of sensed current at room temperature. |
| Slew rate | 8V/µs - allows 1V output step in ≤125ns, enabling sub-microsecond overcurrent response in safety-critical systems. |
| Offset voltage | ±150µV max - contributes ≤1.5mV error at 100V/V gain; drift of ±0.5µV/°C maintains stability over automotive temperature range. |
| Supply range | 2.7V to 20V - compatible with 3.3V, 5V, and 12V system rails; quiescent current 2.5–3.2mA enables low-power BMS operation. |
Pinout & Package
INA296B4QDRQ1 is packaged in SOIC-8 (D package), 4.9mm × 6mm body with standard 1.27mm pitch. Pin functions are validated per TI SBOSA32D Rev D (June 2025).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Current-sense positive input | Connect to bus-voltage side of shunt in high-side; load side in low-side - defines polarity for bidirectional sensing. |
| IN− | Current-sense negative input | Connect to load side of shunt in high-side; ground side in low-side - differential input pair rejects common-mode noise. |
| GND | Ground reference | Analog ground return for internal circuitry; must be tied to system power ground with low-impedance path. |
| NC | No-connect terminal | Reserved pin; electrically isolated - must be connected to GND per datasheet to ensure EMI robustness. |
| OUT | Amplified output | Voltage output = G × (IN+ − IN−) + (REF1 + REF2)/2; drives ADC or comparator directly with rail-to-rail swing capability. |
| REF1 / REF2 | Reference voltage inputs | Set output offset: (REF1 + REF2)/2 configures bidirectional zero-point (e.g., 2.5V for ±2.5V output range). |
| VS | Power supply | 2.7V–20V analog supply; powers internal amplifiers and reference network - independent of common-mode input range. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive powertrain and chassis module reliability requirements. |
| Bidirectional sensing architecture | Supports current flow in both directions via REF1/REF2 offset configuration - eliminates need for dual amplifiers in regenerative braking or charge/discharge monitoring. |
| 166dB CMRR (typical) | Rejects >99.9999% of common-mode noise on 48V bus - essential for accurate sensing in noisy engine bay or inverter environments. |
| Zero-drift input topology | Maintains ±150µV offset and ±0.5µV/°C drift over full temp range - enables <0.1% total error in battery cell current monitoring at 150A. |
| Functional safety documentation support | TI provides FIT rate, failure mode analysis, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system certification. |
Applications
| DC/DC Converter Monitoring | Battery Management Systems (BMS) |
|---|---|
Use Scenario: Real-time current measurement in 48V–60V automotive DC/DC converters supplying ADAS ECUs. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth for transient overcurrent detection. Use Value: Enables cycle-by-cycle current limiting and fast fault shutdown (<1µs response) without sacrificing accuracy at low VSENSE. |
Use Scenario: Cell-level and pack-level current monitoring in EV traction battery packs with 300–800V nominal bus. IC Role / Device Role / Timing Role: Precision shunt amplifier interfacing to 16-bit SAR ADC for SOC/SOH estimation. Use Value: ±150µV offset and ±0.1% gain error ensure <±0.5A absolute error at 500A full scale - critical for Coulomb counting accuracy. |
| Fuel Cell Control Unit | Smart Junction Box |
Use Scenario: Anode/cathode gas flow regulation via precise stack current feedback in PEM fuel cell systems. IC Role / Device Role / Timing Role: Bidirectional current sensor with REF1/REF2 offset tuning for zero-centered output during reversible operation. Use Value: 100V/V gain and −5V to 110V common-mode range allow direct sensing on bipolar stack terminals without isolation or level shifting. |
Use Scenario: Load current monitoring and electronic fuse control in 12V/48V vehicle distribution modules. IC Role / Device Role / Timing Role: High-speed current amplifier feeding microcontroller ADC for real-time load profiling and short-circuit protection. Use Value: 8V/µs slew rate and 1µs 1% settling enable detection of <500ns fault transients - meeting ISO 16750-2 pulse test 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 |
|---|---|---|---|
| INA240A4QDRQ1 | Same 100V/V gain, but ±0.2% gain error and ±200µV offset; lower CMRR (120dB typ); no REF1/REF2 offset tuning. | Limited to unidirectional sensing only; lacks configurable bidirectional output centering. | Select when cost sensitivity outweighs need for ultra-precise bidirectional offset control and tighter gain tolerance. |
| MAX40056ATA+T | 100V/V gain, ±0.15% gain error, ±100µV offset, but narrower common-mode range (−0.2V to 65V) and no AEC-Q100 qualification. | Not qualified for automotive under-hood use; requires external level-shifter for >65V bus monitoring. | Consider for industrial or commercial 48V systems where AEC-Q100 is not mandated and common-mode stays below 65V. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA296B4QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, true bidirectional offset configurability via dual reference pins, and guaranteed 120–130dB CMRR across −40°C to +125°C - making it the only option for ASIL-B-compliant, high-voltage, bidirectional current sensing in automotive power distribution.
Availability
INA296B4QDRQ1 is available at Aetrix Electronics and suitable for automotive DC/DC converter monitoring, battery management systems (BMS), and smart junction box applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for INA296B4QDRQ1 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 company specializing in analog and embedded processing technologies, with leadership in precision analog, automotive ICs, and functional safety solutions.
The INA296x-Q1 product line is designed specifically for high-accuracy, high-voltage bidirectional current sensing in automotive power systems - targeting ASIL-B compliant BMS, DC/DC converters, and electrified chassis control units.
FAQ
What is the maximum common-mode voltage the INA296B4QDRQ1 can withstand during operation?
The INA296B4QDRQ1 has an operational common-mode input range of −5V to 110V, meaning it accurately measures shunt voltage drops across this full span while powered from 2.7V to 20V. Its survival rating extends to −20V to 120V, allowing brief transients beyond operational limits without damage. This enables direct high-side sensing on 48V, 60V, and 72V automotive buses without external protection or level-shifting circuitry.
How does the INA296B4QDRQ1 achieve bidirectional current sensing?
The INA296B4QDRQ1 achieves bidirectional sensing through its dual reference inputs (REF1 and REF2). By applying appropriate voltages - such as REF1 = VS and REF2 = GND - the output centers at VS/2, enabling positive current to produce output above VS/2 and negative current below VS/2. This eliminates the need for external op-amps or dual-supply configurations, simplifying design for regenerative braking or charge/discharge monitoring in BMS.
What is the gain error specification for the INA296B4QDRQ1 over temperature?
The INA296B4QDRQ1 has a maximum gain error of ±0.1% at room temperature, with a drift of ±5ppm/°C over −40°C to +125°C. This translates to ±0.0005% error per °C, resulting in ≤±0.06% additional error across the full automotive temperature range - ensuring consistent scaling for high-accuracy current measurements in engine bay or battery pack environments.
Can the INA296B4QDRQ1 be used in low-side current sensing configurations?
Yes, the INA296B4QDRQ1 supports low-side, high-side, and inline current sensing. In low-side configuration, connect IN+ to the load side of the shunt and IN− to ground. Its −5V to 110V common-mode range accommodates ground-referenced sensing while maintaining excellent CMRR and low offset - ideal for applications where high-side placement introduces noise or layout constraints.
What packaging options are available for the INA296B4QDRQ1?
The INA296B4QDRQ1 is offered exclusively in the SOIC-8 (D) package: 4.9mm × 6mm body size with 1.27mm lead pitch. This industry-standard surface-mount package provides robust thermal performance (RθJA = 122.9°C/W) and compatibility with automated assembly processes used in automotive electronics manufacturing.
INA296B4QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 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:
- 8-SOIC
INA296B4QDRQ1 FAQ
1.How can I place an order for INA296B4QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B4QDRQ1 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 INA296B4QDRQ1 reliable?
The price and inventory of INA296B4QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B4QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B4QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B4QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B4QDRQ1?
INA296B4QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B4QDRQ1 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 INA296B4QDRQ1?
For technical support, including INA296B4QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B4QDRQ1 requirements.
6.How does Aetrix verify that INA296B4QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B4QDRQ1 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 INA296B4QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B4QDRQ1?
All INA296B4QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B4QDRQ1, 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 INA296B4QDRQ1 part is unused and in its original packaging.
Return procedure for INA296B4QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296B4QDRQ1 Tags
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Texas Instruments
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