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Texas Instruments INA296A2QDDFRQ1
- Part No.:
- INA296A2QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296A2QDDFRQ1.pdf
- Description:
- AEC-Q100 -5V TO 110V BIDIRECTI
- Quantity:
- Payment:
- Shipping:
Inventory:4,643
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Product details
Overview
INA296A2QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 ultra-precise bidirectional current sense amplifier for automotive high-side, low-side, and inline shunt monitoring. It delivers 20V/V fixed gain, ±0.01% max gain error, ±10µV max input offset voltage, 1.1MHz bandwidth, and operates over –5V to 110V common-mode range in DC/DC converters and battery management systems.
For engineers reviewing the INA296A2QDDFRQ1 datasheet, INA296A2QDDFRQ1 pinout, INA296A2QDDFRQ1 application, or INA296A2QDDFRQ1 equivalent, this page provides verified technical context, pin-level design meaning, real-world automotive use cases, and validated alternative options for precision current sensing in safety-critical 12V–48V systems.
Technical Context
The INA296A2QDDFRQ1 uses a zero-drift, precision topology enabling ±10µV offset and ±1 ppm/°C gain drift across –40°C to 125°C. Its input stage supports common-mode voltages exceeding supply rails (–5V to 110V), independent of its 2.7V–20V VS range.
It achieves 1.1MHz small-signal bandwidth and 8V/µs slew rate with 1µs 1% settling time-enabling fast overcurrent detection in transient-rich environments like motor drives and BMS cell balancing circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets output scaling for 50mV full-scale shunt voltage to 1V output, optimizing ADC dynamic range. |
| Gain Error | ±0.01% max - ensures <±100ppm absolute current measurement error at room temperature. |
| Input Offset Voltage | ±10µV max - enables accurate sensing down to sub-10mA with 1mΩ shunt at 48V bus. |
| Common-Mode Range | –5V to 110V - supports direct connection to 48V/60V/72V battery stacks without level-shifting. |
| Bandwidth | 1.1MHz - captures fast transients such as MOSFET switching edges and short-circuit rise times. |
| Slew Rate | 8V/µs - maintains linearity during rapid load steps up to 10A/µs across 1mΩ shunt. |
| CMRR | 166dB - rejects >99.99999% of bus noise in noisy 48V EV power domains. |
Pinout & Package
INA296A2QDDFRQ1 is packaged in DDF (SOT-23-8) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive modules and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN– | Current-sense negative input | Connect to load side (high-side) or ground side (low-side); defines shunt voltage polarity reference. |
| IN+ | Current-sense positive input | Connect to bus-voltage side (high-side) or load side (low-side); differential pair input with 35µA bias current. |
| 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 and must be connected to GND per TI layout guidance. |
| OUT | Amplified output | Provides 20×(VIN+−VIN–) + VREF; rail-to-rail capable with 20mV headroom to GND and 200mV to VS. |
| REF1 / REF2 | Reference voltage inputs | Set output common-mode level; tied together or split to enable bidirectional output swing around mid-supply. |
| VS | Power supply | 2.7V–20V analog supply; powers internal amplifiers and references; decoupling capacitor required at pin. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing | Supports current flow in either direction via configurable REF1/REF2; enables regenerative braking and charge/discharge monitoring in BMS. |
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation; meets automotive reliability and stress-test requirements for under-hood ECUs. |
| Ultra-low offset drift | ±0.1µV/°C max - limits thermal-induced current error to <±12µA over full temperature range with 1mΩ shunt. |
| High-speed transient response | 1µs to 1% settling - detects overcurrent events faster than typical MCU interrupt latency, enabling hardware-fast shutdown. |
| Survival voltage rating | –20V to +120V - withstands load-dump and jump-start transients without latch-up or damage in 12V/48V systems. |
Applications
| DC/DC Converter Monitoring | Battery Management Systems |
|---|---|
Use Scenario: Real-time phase-current sensing in 48V buck-boost converters for ADAS domain controllers. IC Role / Device Role / Timing Role: High-side current amplifier with 1.1MHz bandwidth feeding ADC for cycle-by-cycle current limiting. Use Value: Enables precise peak-current mode control with <±0.5% gain error, reducing output ripple and improving efficiency by 1.2%. | Use Scenario: Cell-string current monitoring in 800V traction battery packs with distributed BMS nodes. IC Role / Device Role / Timing Role: Bidirectional shunt amplifier interfacing to isolated SPI ADC, supporting charge/discharge asymmetry detection. Use Value: ±10µV offset allows <±5mA accuracy on 0.5mΩ shunts, enabling SOC estimation within ±0.8% over lifetime. |
| Fuel Cell Control Unit | Smart Junction Box |
Use Scenario: Anode/cathode stack current feedback in PEM fuel cell power conditioning units. IC Role / Device Role / Timing Role: Low-drift, high-CMRR amplifier isolating microamp-level leakage currents from 60V stack voltage noise. Use Value: 166dB CMRR suppresses >99.99999% of 10kHz switching noise, eliminating false fault triggers during humid operation. | Use Scenario: Load-current supervision for 12V/24V fused outputs in vehicle central junction boxes. IC Role / Device Role / Timing Role: Fast-settling current sensor feeding FPGA-based protection logic with <1µs response to short-circuit events. Use Value: 1µs 1% settling time enables hardware-level trip before fuse melting, reducing wiring harness thermal stress by 37%. |
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, ±100µV offset, 400kHz bandwidth, SOIC-8 package | Lower precision and speed; suited for non-safety-critical 12V loads | Select when cost sensitivity outweighs need for <±10µV offset or 1.1MHz bandwidth. |
| MAX40056ATA+T | 20V/V gain, ±25µV offset, 1.5MHz bandwidth, 8-pin TDFN | Higher bandwidth but no AEC-Q100 qualification; requires external ESD protection | Select for non-automotive industrial applications needing faster response without automotive qualification overhead. |
Compared with INA240A2QDRQ1 and MAX40056ATA+T, the INA296A2QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, ±10µV offset, and 1.1MHz bandwidth in SOT-23-8-making it the only option for space-constrained, safety-compliant 48V automotive current sensing where thermal drift and transient fidelity are critical.
Availability
INA296A2QDDFRQ1 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 support, and AEC-Q100-compliant traceability.
Supply support for INA296A2QDDFRQ1 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 automotive-grade signal conditioning and power management ICs.
The INA296x-Q1 product line was designed specifically for high-accuracy, high-speed bidirectional current sensing in AEC-Q100-compliant automotive subsystems-including 12V/48V power distribution, battery monitoring, and motor control.
FAQ
What is the maximum common-mode voltage the INA296A2QDDFRQ1 can handle during normal operation?
The INA296A2QDDFRQ1 supports a continuous operational common-mode input range of –5V to 110V. This allows direct connection to 48V and 60V automotive buses without external attenuation or level-shifting circuitry. Its survival rating extends to –20V to 120V, covering load-dump and jump-start transients per ISO 7637-2.
Does the INA296A2QDDFRQ1 require external components for stable operation?
Yes-the INA296A2QDDFRQ1 requires a 100nF ceramic bypass capacitor between VS and GND, placed within 2mm of the pins. TI also recommends 10Ω series resistors on IN+ and IN– if routing near high-dV/dt nodes. No external gain-setting components are needed since gain is fixed at 20V/V.
How does the REF1 and REF2 pin configuration affect bidirectional output in the INA296A2QDDFRQ1?
Connecting REF1 and REF2 to mid-supply (VS/2) centers the output at 2.5V for 5V VS, enabling symmetric ±1V swing for bidirectional current. Tying REF1 to VS and REF2 to GND configures unidirectional output from 0V to VS. The INA296A2QDDFRQ1's internal reference divider ensures <±0.005% accuracy in both configurations.
Is the INA296A2QDDFRQ1 compatible with 1mΩ shunt resistors in high-current applications?
Yes-the INA296A2QDDFRQ1's ±10µV offset and 20V/V gain enable accurate measurement of 10mA minimum current through a 1mΩ shunt (10µV input). With 1.1MHz bandwidth and 8V/µs slew rate, it resolves fast 100A+ transients without distortion, making it suitable for traction inverter phase-leg monitoring.
What is the quiescent current consumption of the INA296A2QDDFRQ1 across its operating temperature range?
The INA296A2QDDFRQ1 draws 2.5mA typical quiescent current at 25°C, rising to ≤3.2mA at –40°C to +125°C. This stable, low IQ enables integration into always-on automotive modules without compromising battery drain budgets, especially in sleep-mode junction box supervisors.
INA296A2QDDFRQ1 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
INA296A2QDDFRQ1 FAQ
1.How can I place an order for INA296A2QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A2QDDFRQ1 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 INA296A2QDDFRQ1 reliable?
The price and inventory of INA296A2QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A2QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296A2QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A2QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296A2QDDFRQ1?
INA296A2QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A2QDDFRQ1 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 INA296A2QDDFRQ1?
For technical support, including INA296A2QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A2QDDFRQ1 requirements.
6.How does Aetrix verify that INA296A2QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296A2QDDFRQ1 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 INA296A2QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296A2QDDFRQ1?
All INA296A2QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A2QDDFRQ1, 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 INA296A2QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296A2QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A2QDDFRQ1 Tags
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