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Texas Instruments INA296A4QDGKRQ1
- Part No.:
- INA296A4QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA296A4QDGKRQ1.pdf
- Description:
- AEC-Q100, -5-V TO 110-V, BIDIREC
- Quantity:
- Payment:
- Shipping:
Inventory:1,382
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Product details
Overview
INA296A4QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 100V/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 INA296A4QDGKRQ1 datasheet, INA296A4QDGKRQ1 pinout, INA296A4QDGKRQ1 application, or INA296A4QDGKRQ1 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for automotive-grade current sensing design.
Technical Context
The INA296A4QDGKRQ1 uses a zero-drift, precision topology to achieve ±10µV max input offset and ±0.015% max gain error across −40°C to 125°C, with 166dB typical CMRR ensuring immunity to bus-voltage transients. Its 8V/µs slew rate and 1µs 1% settling time support fast overcurrent detection in safety-critical power stages.
It operates from 2.7V–20V supply while accepting common-mode inputs up to 110V - exceeding VS - enabling direct high-side sensing on 48V or 60V automotive buses without level-shifting. The dual reference pins (REF1/REF2) allow configurable unidirectional or bidirectional output swing relative to any point between GND and VS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - scales 10mV shunt drop to 1V output, optimizing SNR for mid-range current sensing with standard ADCs. |
| Common-Mode Range | −5V to 110V - supports direct high-side sensing on 48V/60V automotive rails, including negative transients during load dump. |
| Bandwidth | 1.1MHz - enables accurate capture of fast current transients (e.g., MOSFET switching edges, short-circuit rise times). |
| Input Offset Voltage | ±10µV max - ensures <±0.1% error at 10mV VSENSE, critical for low-current BMS cell balancing or idle-state leakage detection. |
| CMRR | 166dB - rejects >99.99999% of common-mode noise (e.g., 48V bus ripple), preserving measurement integrity in noisy ECU environments. |
| Supply Range | 2.7V to 20V - compatible with 3.3V/5V logic domains while supporting wide-input automotive supplies. |
| Quiescent Current | 2.5mA - enables always-on current monitoring in low-power wake-up circuits without excessive battery drain. |
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 load side (high-side) or ground side (low-side); defines shunt voltage polarity for bidirectional sensing. |
| GND (Pin 2) | Ground reference | Primary return path for internal circuitry and output stage; must be low-impedance connection to system ground plane. |
| REF2 (Pin 3) | Reference voltage input | Configures output midpoint; tie to GND for unidirectional mode or to VS/2 for centered bidirectional output swing. |
| NC (Pin 4) | No-connect terminal | Reserved pin; must be connected to GND per datasheet to ensure stable operation and EMI performance. |
| OUT (Pin 5) | Analog output voltage | Delivers amplified, referenced VSENSE × 100; drives 10kΩ loads with rail-to-rail swing (VS − 0.2V min, 20mV above GND). |
| VS (Pin 6) | Power supply input | Accepts 2.7V–20V; powers internal amplifier and reference network; bypass with 1µF ceramic capacitor near pin. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to set output offset; identical function to REF2; both pins tolerate 0V to VS. |
| IN+ (Pin 8) | Current-sense amplifier positive input | Connect to bus-voltage side (high-side) or load side (low-side); differential pair with IN− measures shunt voltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation - meets automotive engine bay and under-hood thermal requirements. |
| Bidirectional sensing capability | Output polarity reverses with current direction when REF1/REF2 are biased asymmetrically - enables regenerative braking current monitoring. |
| 1.1MHz bandwidth at full gain | Preserves signal fidelity for transient events up to 100kHz fundamental frequency - sufficient for PWM-based OCP response in DC/DC controllers. |
| ±10µV max input offset (INA296A4-Q1) | Enables sub-0.1% error at 10mV shunt drops - allows use of lower-resistance, lower-power-loss shunts in high-current BMS applications. |
| Survival voltage: −20V to 120V | Withstands automotive load-dump transients and reverse-battery conditions without latch-up or permanent damage. |
| Functional safety documentation support | TI provides FIT rate data, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system-level certification. |
Applications
| Automotive High-Side DC/DC Converter Monitoring | Battery Management System (BMS) Cell Balancing |
|---|---|
|
Use Scenario: Real-time current measurement on 48V–60V buck converter output feeding ADAS ECUs. IC Role / Device Role / Timing Role: High-side current sense amplifier providing isolated, high-bandwidth feedback to PWM controller for cycle-by-cycle overcurrent protection. Use Value: 1.1MHz bandwidth captures MOSFET switching transients; 166dB CMRR rejects 48V rail noise; ±10µV offset enables <±0.1% accuracy at 10mV shunt drop. |
Use Scenario: Precision current monitoring during active cell balancing in 12S Li-ion packs. IC Role / Device Role / Timing Role: Bidirectional current sense amplifier measuring charge/discharge current through balancing FETs with µV-level resolution. Use Value: ±10µV offset and ±0.015% gain error ensure <±0.1% total error over temperature; −5V to 110V common-mode range accommodates stack voltages up to 500V. |
| Smart Junction Box Load Switching | Fuel Cell Control Unit Current Feedback |
|
Use Scenario: In-line current sensing for solid-state relay control in 12V/24V smart junction boxes. IC Role / Device Role / Timing Role: Low-side or inline bidirectional amplifier delivering fast fault detection (<1µs settling) to microcontroller GPIO interrupt. Use Value: 1µs 1% settling time enables sub-microsecond overcurrent response; 8V/µs slew rate prevents distortion during step-load transients. |
Use Scenario: Anode/cathode current monitoring in PEM fuel cell stacks operating at 30–60V nominal. IC Role / Device Role / Timing Role: High-precision, high-CMRR amplifier interfacing with isolated ADC for closed-loop stack current regulation. Use Value: 166dB CMRR suppresses common-mode noise from high-frequency DC/AC inverters; survival rating to 120V covers startup surges and fault conditions. |
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 ±120µV max offset and ±0.2% max gain error; lower CMRR (150dB); 400kHz bandwidth. | Targeted at cost-sensitive, non-safety-critical applications where <0.2% accuracy suffices and bandwidth demand is ≤200kHz. | Select INA240A4QDRQ1 only if system-level accuracy budget allows ≥0.2% error and transient response >2.5µs is acceptable. |
| MAX40056ATA+T | 100V/V gain, ±50µV max offset, 1.5MHz bandwidth, but only −0.2V to 65V common-mode range and no AEC-Q100 qualification. | Suitable for industrial 24V/48V systems requiring higher bandwidth, but not for automotive environments with >65V transients or ASIL requirements. | Choose MAX40056ATA+T only for non-automotive designs needing >1.1MHz bandwidth and where common-mode stays below 65V. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA296A4QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 166dB CMRR, ±10µV offset, and −5V to 110V common-mode range - making it the only option qualified for precision high-voltage bidirectional sensing in ASIL-B automotive power systems.
Availability
INA296A4QDGKRQ1 is available at Aetrix Electronics and suitable for automotive DC/DC converters, battery management systems, and smart junction box designs requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for INA296A4QDGKRQ1 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, embedded processing, and automotive ICs, with decades of automotive qualification expertise and broad AEC-Q100 product coverage.
The INA296x-Q1 family is designed specifically for high-accuracy, high-speed current sensing in automotive power systems - targeting ASIL-B functional safety compliance, wide common-mode operation, and zero-drift precision across extreme temperature ranges.
FAQ
What is the maximum common-mode voltage the INA296A4QDGKRQ1 can withstand continuously?
The INA296A4QDGKRQ1 has a continuous operational common-mode input range of −5V to 110V. Its survival rating extends to −20V to 120V, meaning it can tolerate brief automotive transients like load dump without damage. This allows direct high-side sensing on 48V and 60V automotive buses without external level-shifting circuitry. The INA296A4QDGKRQ1 maintains specified performance across its full −5V to 110V operating range.
Does the INA296A4QDGKRQ1 support bidirectional current sensing, and how is it configured?
Yes, the INA296A4QDGKRQ1 supports true bidirectional current sensing via its dual reference inputs (REF1 and REF2). When both are tied to VS/2, the output centers at VS/2 and swings symmetrically for forward/reverse current. When REF1 = VS and REF2 = GND, output is unidirectional. This flexibility enables precise regenerative current measurement in motor drives and fuel cell systems. The INA296A4QDGKRQ1 requires no external components to enable either mode.
What is the guaranteed input offset voltage specification for the INA296A4QDGKRQ1 over temperature?
The INA296A4QDGKRQ1 guarantees a maximum input offset voltage of ±10µV at TA = 25°C, with drift limited to ±0.1µV/°C over −40°C to +125°C. This results in ≤±22.5µV total offset across the full Grade 1 temperature range - enabling sub-0.1% error at 10mV shunt voltage. The INA296A4QDGKRQ1 achieves this via a precision zero-drift architecture, distinct from chopper-stabilized alternatives that introduce switching artifacts.
Can the INA296A4QDGKRQ1 be used with a 3.3V supply, and what is its output swing capability?
Yes, the INA296A4QDGKRQ1 operates from 2.7V to 20V, so 3.3V is fully supported. With VS = 3.3V, the output swings from ≥20mV above GND to ≤3.1V (VS − 0.2V), maintaining 3.0V of usable dynamic range. This allows direct interface with 3.3V SAR ADCs without level-shifting. The INA296A4QDGKRQ1's rail-to-rail output stage ensures full utilization of the ADC's input range under all valid supply conditions.
Is the INA296A4QDGKRQ1 pin-compatible with other devices in the INA296x-Q1 family?
Yes, all 8-pin variants in the INA296x-Q1 family - including INA296A1QDGKRQ1 through INA296A5QDGKRQ1 and their INA296B counterparts - share identical pinouts across SOT23-8 (DDF), VSSOP-8 (DGK), and SOIC-8 (D) packages. The INA296A4QDGKRQ1 uses the DGK (VSSOP-8) footprint and is mechanically and electrically interchangeable with other gain versions in the same package, simplifying design reuse and BOM consolidation.
INA296A4QDGKRQ1 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
INA296A4QDGKRQ1 FAQ
1.How can I place an order for INA296A4QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296A4QDGKRQ1 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 INA296A4QDGKRQ1 reliable?
The price and inventory of INA296A4QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296A4QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA296A4QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296A4QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296A4QDGKRQ1?
INA296A4QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296A4QDGKRQ1 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 INA296A4QDGKRQ1?
For technical support, including INA296A4QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296A4QDGKRQ1 requirements.
6.How does Aetrix verify that INA296A4QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296A4QDGKRQ1 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 INA296A4QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA296A4QDGKRQ1?
All INA296A4QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296A4QDGKRQ1, 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 INA296A4QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA296A4QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296A4QDGKRQ1 Tags
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