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Texas Instruments INA293B3QDBVRQ1
- Part No.:
- INA293B3QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
INA293B3QDBVRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
INA293B3QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40 °C to +125 °C) ultra-precise current sense amplifier for automotive high-side and low-side shunt monitoring, featuring 100 V/V fixed gain, –4 V to +110 V common-mode input range, ±0.15% max gain error, ±10 µV max offset voltage, and 1.3 MHz bandwidth - deployed in 48-V solenoid and valve control systems.
For engineers reviewing the INA293B3QDBVRQ1 datasheet, INA293B3QDBVRQ1 pinout, INA293B3QDBVRQ1 application, or INA293B3QDBVRQ1 equivalent, key selection criteria include its negative common-mode capability (–4 V), functional safety documentation support, 160-dB DC CMRR, 2.5 V/µs slew rate, and SOT-23-5 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The INA293B3QDBVRQ1 uses a transconductance architecture with current-feedback amplifier topology to achieve 20 µA typical input bias current at 110 V common-mode voltage and enable precision recirculating current measurement in half-bridge applications. Its zero-drift input stage delivers ±0.05 µV/°C typical offset drift and supports accurate low-VSENSE operation down to millivolt-level shunt drops.
This B-variant device implements the alternate SOT-23 pinout (Vs on Pin 3, IN+ on Pin 4, IN– on Pin 5), distinct from the A-variant, and is optimized for unidirectional current sensing only - with output swing limited to GND + 5 mV min and Vs – 150 mV max under full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V fixed - sets output scaling for 10 mV input → 1 V output; eliminates external gain-setting components. |
| Common-mode range | –4 V to +110 V - enables operation below ground for recirculating current detection in half-bridge motor drivers. |
| DC CMRR | 160 dB - rejects >99.9999% of common-mode voltage error at DC, critical for accuracy in noisy 48-V rail environments. |
| Bandwidth | 1.3 MHz at G = 100 V/V - supports fast overcurrent response (<2 µs for 75-A threshold on 2-mΩ shunt). |
| Offset voltage | ±10 µV max (typical ±15 µV) - ensures <0.1% error contribution at 100-mV sense voltage across full temperature range. |
| Quiescent current | 1.5 mA - enables low-power operation in always-on automotive subsystems without compromising speed or precision. |
| Slew rate | 2.5 V/µs - maintains fidelity during rapid current transients, preventing distortion in fast-switching solenoid control loops. |
Pinout & Package
SOT-23-5 (DBV) package, 2.90 mm × 1.60 mm body size, thermal resistance RθJA = 184.7 °C/W - suitable for compact automotive PCBs with moderate power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Amplified output | Delivers 100× differential input voltage; swing limited to GND + 5 mV min / Vs – 150 mV max over –40 °C to +125 °C. |
| 2: GND | Analog ground reference | Return path for internal bias and output stage; must be connected to low-impedance system ground plane. |
| 3: Vs | Positive supply | Accepts 2.7 V to 20 V; powers internal amplifiers and buffer; decoupling capacitor required within 1 cm. |
| 4: IN+ | Shunt positive sense input | Connects to high-side of current-sense resistor; input bias current ≤30 µA up to +110 V common-mode. |
| 5: IN– | Shunt negative sense input | Connects to low-side of shunt; enables bidirectional common-mode tolerance (–4 V to +110 V) and recirculation sensing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures (–40 °C to +125 °C), ensuring reliability in engine bay and chassis-mounted ECUs. |
| Functional safety documentation | TI provides FIT rate data, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system certification. |
| Negative common-mode capability | –4 V input rating allows direct connection to shunts placed between load and ground in half-bridge configurations with reverse current flow. |
| 160-dB DC CMRR | Reduces error from battery rail noise and switching transients to <0.0001% - essential for stable feedback in 48-V DC/DC converters. |
| 1.3-MHz bandwidth at G = 100 | Enables real-time current monitoring for fast overcurrent protection in solenoid drivers, reducing fault response latency to sub-microsecond. |
| Zero-drift input architecture | Maintains ±10 µV max offset and ±0.05 µV/°C drift - eliminates calibration drift over vehicle lifetime and thermal cycling. |
Applications
| 48-V Automotive Systems | Solenoid Control |
|---|---|
Use Scenario: Monitoring battery-fed 48-V power distribution networks in mild-hybrid vehicles, including PDCs and domain controllers. IC Role / Device Role / Timing Role: High-side current sense amplifier measuring load current with ±0.1% accuracy across –40 °C to +125 °C ambient. Use Value: Enables precise energy accounting and fault detection without adding series resistance or compromising efficiency in high-current paths. |
Use Scenario: Closed-loop current regulation in electro-hydraulic brake (EHB) and transmission solenoid actuators. IC Role / Device Role / Timing Role: Unidirectional current monitor feeding ADC input for PWM-controlled solenoid drive circuits. Use Value: Supports <2 µs overcurrent response time using 2-mΩ shunt, preventing coil saturation and thermal damage during transient faults. |
| 48-V DC/DC Converters | Valve Control |
Use Scenario: Input/output current sensing in bidirectional 48-V/12-V DC/DC converters for vehicle electrification architectures. IC Role / Device Role / Timing Role: Low-drift, high-CMRR amplifier interfacing with isolated ADCs to measure converter efficiency and detect short-circuit conditions. Use Value: Delivers stable 100-V/V gain and 160-dB CMRR to reject switching noise from synchronous rectifiers and gate drivers. |
Use Scenario: Proportional current control in fuel injectors, EGR valves, and turbocharger actuators requiring precise duty-cycle modulation. IC Role / Device Role / Timing Role: Shunt-based current feedback element in analog current loops driving high-side N-channel MOSFETs. Use Value: Maintains ±0.15% gain accuracy over temperature, enabling repeatable valve positioning and emissions compliance across vehicle life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDR | 50 V/V gain, 800-kHz bandwidth, ±120-µV max offset, same SOT-23-5 package but A-variant pinout (IN+ on Pin 3) | Better suited for higher-bandwidth, lower-gain applications where 100-V/V gain causes output saturation at low shunt voltages | Select when system requires wider dynamic range with lower gain and can accommodate different pin assignment. |
| MAX40080AUA+T | 100 V/V gain, 1-MHz bandwidth, ±50-µV max offset, 1.5-V to 5.5-V supply, 6-pin µMAX package | Optimized for low-voltage, low-power applications (e.g., ADAS camera modules); lacks AEC-Q100 qualification and negative common-mode support | Choose only for non-automotive, low-supply-voltage designs where AEC-Q100 and –4-V operation are not required. |
Compared with INA240A3QDR and MAX40080AUA+T, the INA293B3QDBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, –4-V common-mode capability, and 1.3-MHz bandwidth at 100-V/V gain - making it the only option qualified for high-accuracy, high-speed current monitoring in 48-V automotive powertrain and chassis systems.
Availability
INA293B3QDBVRQ1 is available at Aetrix Electronics and suitable for 48-V automotive systems, solenoid control modules, and 48-V DC/DC converters requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for INA293B3QDBVRQ1 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, with deep expertise in precision analog, automotive-grade ICs, and functional safety design.
The INA293-Q1 product line is engineered specifically for high-reliability automotive current sensing - targeting AEC-Q100-compliant systems that demand ultra-low offset, wide common-mode range, and fast transient response in 12-V, 48-V, and hybrid architectures.
FAQ
What is the exact pin configuration of the INA293B3QDBVRQ1?
The INA293B3QDBVRQ1 uses the B-variant SOT-23-5 pinout: Pin 1 = OUT, Pin 2 = GND, Pin 3 = Vs, Pin 4 = IN+, Pin 5 = IN–. This differs from the A-variant (INA293A3QDBVRQ1), where Vs is on Pin 5 and IN+ is on Pin 3. PCB layout must match this specific assignment to ensure correct operation.
Does the INA293B3QDBVRQ1 support bidirectional current sensing?
No, the INA293B3QDBVRQ1 operates in unidirectional mode only - it measures current flowing from power supply to load. Its output cannot go below GND + 5 mV, so it cannot represent reverse current polarity. For bidirectional applications, a separate amplifier or dual-supply design is required.
What is the maximum common-mode voltage survival rating for the INA293B3QDBVRQ1?
The INA293B3QDBVRQ1 has a survival rating of –20 V to +120 V common-mode voltage, meaning it withstands transient overvoltage events within that range without permanent damage - though operational range remains –4 V to +110 V per specifications.
How does the 100 V/V gain of the INA293B3QDBVRQ1 affect shunt resistor selection?
With 100 V/V gain, a 10-mV differential input produces 1 V output. To avoid output saturation at maximum current, select RSENSE such that IMAX × RSENSE × 100 ≤ Vs – 0.15 V. For example, at Vs = 5 V and IMAX = 50 A, RSENSE must be ≤ 0.7 mΩ - balancing accuracy, power loss, and headroom.
Is functional safety documentation available for the INA293B3QDBVRQ1?
Yes, Texas Instruments provides a functional safety FIT report, failure mode effects analysis (FMEA), and safety manual for the INA293-Q1 family - supporting ISO 26262 ASIL-B system-level development. Documentation is accessible via TI's product folder for INA293-Q1 under "Functional Safety Resources".
INA293B3QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 1.5mA
- 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:
- SOT-23-5
INA293B3QDBVRQ1 FAQ
1.How can I place an order for INA293B3QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA293B3QDBVRQ1 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 INA293B3QDBVRQ1 reliable?
The price and inventory of INA293B3QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA293B3QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for INA293B3QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA293B3QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA293B3QDBVRQ1?
INA293B3QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA293B3QDBVRQ1 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 INA293B3QDBVRQ1?
For technical support, including INA293B3QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA293B3QDBVRQ1 requirements.
6.How does Aetrix verify that INA293B3QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All INA293B3QDBVRQ1 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 INA293B3QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of INA293B3QDBVRQ1?
All INA293B3QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA293B3QDBVRQ1, 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 INA293B3QDBVRQ1 part is unused and in its original packaging.
Return procedure for INA293B3QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA293B3QDBVRQ1 Tags
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