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Texas Instruments INA296B5QDDFRQ1
- Part No.:
- INA296B5QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA296B5QDDFRQ1.pdf
- Description:
- AEC-Q100, -5-V TO 110-V, BIDIREC
- Quantity:
- Payment:
- Shipping:
Inventory:2,831
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Product details
Overview
INA296B5QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with 200V/V fixed gain, −5V to 110V common-mode input range, 1.1MHz bandwidth, and 8V/µs slew rate. It delivers ±150µV max input offset voltage and ±0.1% max gain error for precision shunt-based current monitoring in high-voltage battery management systems.
For engineers reviewing the INA296B5QDDFRQ1 datasheet, INA296B5QDDFRQ1 pinout, INA296B5QDDFRQ1 application, or INA296B5QDDFRQ1 equivalent, this page provides verified technical context, package-specific pin functions, real-world automotive use cases, and validated alternative options for BMS and DC/DC converter designs requiring ultra-stable gain and fast transient response.
Technical Context
The INA296B5QDDFRQ1 employs a zero-drift, high-side–capable architecture enabling operation beyond its 2.7V–20V supply rails-supporting common-mode voltages from −5V to 110V independent of VS. Its multistage design maintains 1.1MHz bandwidth and 1µs 1% settling time across all gains, including the 200V/V configuration of this variant.
It features dual reference inputs (REF1/REF2) that configure output offset for bidirectional sensing, low 35µA typical input bias current stable over full VCM range, and 166dB DC CMRR optimized for noisy automotive power domains. Functional safety documentation is available per ISO 26262 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - sets full-scale output to 2V for 10mV shunt drop; enables high-resolution low-current measurement with minimal shunt power loss. |
| Common-mode Range | −5V to 110V - supports direct high-side sensing on 48V/60V/80V automotive buses without level-shifting or isolation. |
| Bandwidth | 1.1MHz - captures fast overcurrent transients (e.g., short-circuit events in <1µs) in traction inverters and DC/DC controllers. |
| Input Offset Voltage | ±150µV max - ensures ≤0.75mV error at 200V/V gain; critical for accurate low-current state-of-charge estimation in BMS. |
| Slew Rate | 8V/µs - sustains linear output response during rapid load steps; avoids distortion in pulse-width modulated motor drives. |
| Supply Range | 2.7V to 20V - compatible with 3.3V/5V/12V system rails; output swings within 200mV of VS and 20mV above GND. |
| Quiescent Current | 2.5mA - enables always-on monitoring in low-power vehicle subsystems without excessive battery drain. |
Pinout & Package
INA296B5QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive modules. Pin functions are validated per TI SBOSA32D Rev D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense negative input | Connects to load side (high-side) or ground side (low-side) of shunt; defines differential sense node with IN+. |
| 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 offset; tied with REF1 to set bidirectional zero point (e.g., VS/2 = 0A output). |
| NC (Pin 4) | No-connect terminal | Reserved pin; electrically isolated and must be connected to GND per datasheet layout guidance. |
| OUT (Pin 5) | Analog output | Provides amplified, referenced voltage proportional to sensed current; drives ADC inputs or comparator thresholds directly. |
| VS (Pin 6) | Power supply | Accepts 2.7V–20V rail; powers internal amplifier and reference network; output swing bounded by this voltage. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output centerpoint; identical function and electrical behavior to REF2. |
| IN+ (Pin 8) | Current-sense positive input | Connects to bus-voltage side (high-side) or load side (low-side) of shunt; completes differential measurement path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional sensing capability | Enabled via dual reference pins (REF1/REF2); supports both charge and discharge current measurement in EV battery packs without polarity reversal hardware. |
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C ambient operation; validated for automotive powertrain and chassis applications with full temperature-range parameter guarantees. |
| Ultra-high CMRR (166dB) | Rejects >99.9999% of common-mode noise from 48V bus switching; eliminates need for external filtering in noisy DC/DC converter feedback loops. |
| Stable 35µA input bias current | Remains constant across −5V to 110V VCM; prevents gain error drift due to shunt voltage variation-critical for accuracy in wide-input-range converters. |
| Functional safety support | TI provides FIT rate data, failure mode analysis, and safety manual to accelerate ISO 26262 ASIL-B system certification for BMS and junction box controllers. |
Applications
| Battery Management System (BMS) | 48V Mild Hybrid DC/DC Converter |
|---|---|
|
Use Scenario: Real-time cell-string current monitoring during regenerative braking and fast charging cycles in 800V EV architectures. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 200V/V gain, referenced to mid-supply for symmetric ±100A measurement range. Use Value: ±150µV offset enables sub-100mA resolution at 100A full scale; 1.1MHz bandwidth captures transient faults before thermal damage occurs. |
Use Scenario: Input/output current sensing in dual-phase buck-boost converters converting 12V starter battery to regulated 48V rail. IC Role / Device Role / Timing Role: Low-latency current monitor feeding analog-to-digital converter for peak-current-mode control loop. Use Value: 1µs 1% settling time ensures accurate current sampling within 500ns window of PWM edge; 8V/µs slew rate prevents distortion during 500kHz switching. |
| Smart Junction Box (SJB) | Fuel Cell Control Unit |
|
Use Scenario: Load-level monitoring and short-circuit protection across 12V distribution fuses in next-gen vehicle electrical centers. IC Role / Device Role / Timing Role: Low-side current amplifier with GND-referenced output, interfacing directly to microcontroller ADC. Use Value: −5V to 110V VCM accommodates reverse-battery and load-dump transients; ±0.1% gain error ensures consistent trip thresholds across temperature. |
Use Scenario: Anode/cathode stack current regulation in PEM fuel cell stacks operating at 60–100V nominal bus voltage. IC Role / Device Role / Timing Role: High-precision, high-CMRR amplifier for closed-loop current control in electrochemical reaction management. Use Value: 166dB CMRR rejects EMI from adjacent hydrogen pump drivers; 2.5mA IQ supports continuous monitoring without compromising stack efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDRQ1 | 200V/V gain, but ±120µV max offset and ±0.2% gain error; lower 400kHz bandwidth; no REF1/REF2 bidirectional configuration. | Limited to unidirectional sensing; requires external op-amp or level-shifter for bidirectional BMS use. | Select when cost sensitivity outweighs need for ultra-low offset and flexible reference architecture. |
| MAX40056ATA+T | 200V/V gain, ±100µV offset, but only −0.2V to 65V VCM; 1.5MHz bandwidth; single REF pin; not AEC-Q100 qualified. | Not suitable for 80V+ automotive buses or safety-critical ASIL-B systems; lacks functional safety documentation. | Consider only for non-automotive industrial 48V systems where extended VCM and qualification are not required. |
Compared with INA240A5QDRQ1 and MAX40056ATA+T, INA296B5QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, true bidirectional operation via dual reference pins, and guaranteed 1.1MHz bandwidth at 200V/V gain-enabling single-chip solutions for high-voltage, safety-compliant automotive current monitoring without external signal conditioning.
Availability
INA296B5QDDFRQ1 is available at Aetrix Electronics and suitable for battery management systems, 48V mild hybrid DC/DC converters, and smart junction boxes requiring stable component supply across automotive production lifecycles.
Supply support for INA296B5QDDFRQ1 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-accuracy, high-speed current sensing in AEC-Q100-compliant automotive subsystems-including battery monitoring, power conversion, and intelligent power distribution-where precision, reliability, and functional safety are mandatory.
FAQ
What is the maximum common-mode voltage supported by the INA296B5QDDFRQ1?
The INA296B5QDDFRQ1 supports a maximum operational common-mode voltage of 110V and can survive up to 120V. This allows direct high-side sensing on 48V, 60V, and 80V automotive buses without external level-shifting circuitry. The device maintains specified performance across the full −5V to 110V range, independent of its 2.7V–20V supply voltage. INA296B5QDDFRQ1 is validated for continuous operation at these extremes under AEC-Q100 Grade 1 conditions.
Does the INA296B5QDDFRQ1 support bidirectional current sensing?
Yes, the INA296B5QDDFRQ1 supports true bidirectional current sensing through its dual reference inputs (REF1 and REF2). By applying appropriate voltages-such as VS/2 to both pins-the output centerpoint is set to mid-supply, enabling positive output for current in one direction and negative-relative output for the opposite direction. This eliminates the need for external op-amps or level shifters in applications like EV battery pack charge/discharge monitoring. INA296B5QDDFRQ1's architecture guarantees matched performance in both directions.
What is the gain error specification for the INA296B5QDDFRQ1?
The INA296B5QDDFRQ1 has a maximum gain error of ±0.1% at room temperature, with a maximum drift of ±5ppm/°C over the full −40°C to +125°C operating range. This specification applies specifically to the B-grade version (INA296B5QDDFRQ1), distinguishing it from the tighter ±0.01% A-grade variants. The error is measured under standard conditions (VSENSE = 0mV, (GND + 50mV) < VOUT < (VS − 200mV)) and is fully characterized per AEC-Q100 test requirements.
Can the INA296B5QDDFRQ1 operate with a 3.3V supply?
Yes, the INA296B5QDDFRQ1 operates with a minimum supply voltage of 2.7V, making it fully compatible with 3.3V system rails. At 3.3V, the output swings from ≥8mV above GND to ≤3.1V (VS − 0.2V), maintaining full dynamic range for ADC interfacing. Quiescent current remains within 2.5–3.2mA across temperature, and all key specs-including 1.1MHz bandwidth and 166dB CMRR-are guaranteed down to 2.7V. INA296B5QDDFRQ1's wide supply range simplifies integration into mixed-voltage automotive domains.
Is the INA296B5QDDFRQ1 pin-compatible with other INA296x-Q1 variants?
Yes, the INA296B5QDDFRQ1 shares identical pinout and package (SOT-23-8, DDF) with all other INA296x-Q1 variants-including INA296A1–A5QDDFRQ1 and INA296B1–B4QDDFRQ1. All devices use the same 8-pin topology with IN−, GND, REF2, NC, OUT, VS, REF1, and IN+ assignments. This enables drop-in replacement across gain options during design iteration or production ramp-provided the system accommodates the corresponding gain-dependent output scaling and reference configuration.
INA296B5QDDFRQ1 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:
- 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:
- TSOT-23-8
INA296B5QDDFRQ1 FAQ
1.How can I place an order for INA296B5QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA296B5QDDFRQ1 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 INA296B5QDDFRQ1 reliable?
The price and inventory of INA296B5QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA296B5QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA296B5QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA296B5QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA296B5QDDFRQ1?
INA296B5QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA296B5QDDFRQ1 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 INA296B5QDDFRQ1?
For technical support, including INA296B5QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA296B5QDDFRQ1 requirements.
6.How does Aetrix verify that INA296B5QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA296B5QDDFRQ1 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 INA296B5QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA296B5QDDFRQ1?
All INA296B5QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA296B5QDDFRQ1, 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 INA296B5QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA296B5QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA296B5QDDFRQ1 Tags
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