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Texas Instruments INA282AQDRQ1
- Part No.:
- INA282AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA282AQDRQ1.pdf
- Description:
- IC CURRENT MONITOR 0.4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,052
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Product details
Overview
INA282AQDRQ1 from Texas Instruments is an automotive-grade, bidirectional, zero-drift current shunt monitor optimized for high-accuracy sensing in EV/HEV battery management and EPS systems. It features a –14 V to +80 V common-mode input range, ±20 μV offset voltage, 140 dB CMRR, 50 V/V fixed gain, and operates from a 2.7–18 V supply with 900 μA max quiescent current.
For engineers reviewing the INA282AQDRQ1 datasheet, INA282AQDRQ1 pinout, INA282AQDRQ1 application, or INA282AQDRQ1 equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases in automotive safety-critical subsystems, and validated alternative options for functional replacement in AEC-Q100 Grade 1 designs.
Technical Context
The INA282AQDRQ1 implements a zero-drift chopper-stabilized architecture to achieve ±20 μV offset and 0.3 μV/°C drift over –40°C to +125°C, enabling accurate 10 mV full-scale shunt measurements. Its switched-capacitor input stage delivers 140 dB DC CMRR but introduces discrete-time step response behavior-settling within 15 μs after common-mode transients.
It supports unidirectional or bidirectional current sensing via configurable REF1/REF2 pins, allowing ground-referenced, V+-referenced, or externally biased output operation. The device accepts differential inputs up to ±5 V while maintaining functionality across –14 V to +80 V common-mode voltages independent of supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Common-Mode Range | –14 V to +80 V: Enables direct high-side sensing on 48 V/60 V battery rails without level-shifting or external protection. |
| Gain | 50 V/V: Converts 20 mV shunt drop into 1 V output-ideal for 12-bit ADC interfacing with minimal signal conditioning. |
| Offset Voltage | ±20 μV (max): Supports ≤10 mV full-scale shunt voltage while maintaining <1% error at low currents. |
| CMRR | 140 dB (min): Rejects >100 V common-mode noise in noisy automotive environments (e.g., motor drive switching). |
| Quiescent Current | 900 μA (max): Allows integration into always-on vehicle modules without excessive standby power draw. |
| Operating Temp | –40°C to +125°C (Grade 1): Qualified per AEC-Q100 for under-hood and battery-pack mounting locations. |
| Supply Voltage | 2.7 V to 18 V: Compatible with 3.3 V microcontrollers and 12 V automotive systems without LDO pre-regulation. |
Pinout & Package
INA282AQDRQ1 is available in SOIC-8 (4.90 mm × 3.91 mm) and VSSOP-8 (3.00 mm × 3.00 mm) packages. Both variants share identical pinout and thermal performance characteristics per TI SBOS554C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Analog input | Connects to negative side of shunt resistor; forms differential pair with +IN for bidirectional current polarity detection. |
| 2: GND | Analog ground | Reference node for internal circuitry; must be tied to system analog ground with low-impedance path to minimize noise coupling. |
| 3: REF2 | Analog reference input | One half of internal reference divider; used with REF1 to set output quiescent voltage (0 V to V+ or external reference). |
| 4: NC | No connect | Internally unconnected; may be left floating or tied to GND-no electrical function or signal integrity impact. |
| 5: OUT | Analog output | Voltage output proportional to shunt voltage × 50; swing limited to GND+15 mV to (V+)–400 mV over temperature. |
| 6: V+ | Power supply | Single 2.7–18 V analog supply; powers internal amplifier and reference circuitry-no separate digital rail required. |
| 7: REF1 | Analog reference input | Second half of internal reference divider; symmetric with REF2-both pins must be biased within 0 V to V+ and average ≤9 V. |
| 8: +IN | Analog input | Connects to positive side of shunt resistor; differential input pair enables rejection of common-mode bus noise. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV / CDM ±750 V ESD robustness-meets automotive production requirements. |
| Zero-drift architecture | Enables 10 mV full-scale shunt sensing with <1% total error across temperature-reduces shunt power loss by 10× vs. conventional amplifiers. |
| Bidirectional sensing support | Configurable REF1/REF2 pins allow precise mid-rail output biasing (e.g., 2.5 V on 5 V supply), enabling accurate charge/discharge current measurement in BMS. |
| Functional safety documentation | Texas Instruments provides FIT rate data, failure mode analysis, and diagnostic coverage guidance-supports ISO 26262 ASIL-B system development. |
| Transient fault tolerance | Withstands –14 V reverse-battery and +80 V load-dump events without external clamping-eliminates need for TVS diodes in many automotive nodes. |
Applications
| EV Battery Management | Electric Power Steering |
|---|---|
Use Scenario: Real-time monitoring of pack-level charge/discharge current during regenerative braking and fast charging cycles. IC Role / Device Role / Timing Role: Bidirectional current shunt monitor measuring ±200 A through 100 μΩ shunt with 10 mV full-scale resolution. Use Value: Enables SOC estimation accuracy within ±0.5% by resolving low-current leakage (<10 mA) and high-current transients (>150 A) with same sensor. |
Use Scenario: Torque motor current feedback in 12 V EPS control units subject to PWM switching noise and load dump transients. IC Role / Device Role / Timing Role: High-CMRR current sense amplifier rejecting >100 V common-mode noise from 20 kHz motor gate drivers. Use Value: Maintains closed-loop torque control stability during engine cranking (8 V brownout) and load dump (80 V surge) without signal corruption. |
| Brake System Control | Electronic Stability Control |
Use Scenario: Monitoring electromechanical brake actuator current in 48 V mild-hybrid architectures with strict ASIL-C timing constraints. IC Role / Device Role / Timing Role: Low-drift, high-bandwidth (10 kHz) current monitor providing real-time feedback to brake ECU for pressure modulation. Use Value: Delivers <2 μs propagation delay and <15 μs transient recovery-meeting ISO 26262 timing channel requirements for fail-operational braking. |
Use Scenario: Wheel motor current sensing in all-wheel-drive ESC modules operating across –40°C to +125°C underhood conditions. IC Role / Device Role / Timing Role: AEC-Q100 qualified current shunt monitor with 0.3 μV/°C offset drift ensuring consistent torque vectoring calibration across temperature. Use Value: Eliminates recalibration drift over vehicle lifetime-reducing field return rates for ESC false activation due to current measurement drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current shunt monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Higher gain (20 V/V), wider bandwidth (400 kHz), lower offset drift (0.2 μV/°C), but narrower CM range (–4 V to 80 V). | Optimized for high-speed motor phase current sensing; unsuitable for low-side sensing below –4 V common-mode (e.g., battery negative monitoring). | Select when bandwidth >100 kHz is required and common-mode stays above –4 V; avoid for bidirectional battery terminal sensing. |
| MAX40056ATA+T | Wider CM range (–100 V to +65 V), higher accuracy (±0.5% gain error), but no AEC-Q100 qualification and 125°C max junction temp only. | Targeted at industrial/high-voltage traction inverters; lacks automotive qualification documentation and functional safety support. | Use only in non-automotive or non-safety-critical applications; not suitable for OEM Tier-1 BMS or EPS designs requiring AEC-Q100 evidence. |
Compared with INA282AQDRQ1, INA240A1QDRQ1 trades common-mode flexibility for speed and drift performance, while MAX40056ATA+T offers extended negative CM range but lacks automotive qualification-making INA282AQDRQ1 the optimal choice for cost-sensitive, Grade 1-compliant bidirectional sensing where 10 kHz bandwidth suffices.
Availability
INA282AQDRQ1 is available at Aetrix Electronics and suitable for EV battery management, electric power steering, and brake system control requiring stable component supply across automotive production lifecycles.
Supply support for INA282AQDRQ1 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 electronics and functional safety solutions.
The INA28x-Q1 product line was designed specifically for high-accuracy, high-CM-range current sensing in AEC-Q100 Grade 1 automotive subsystems-including battery management, motor control, and chassis electronics-where reliability and precision are non-negotiable.
FAQ
What is the maximum common-mode voltage the INA282AQDRQ1 can handle?
The INA282AQDRQ1 supports a common-mode input voltage range of –14 V to +80 V, enabling direct high-side sensing on 48 V battery rails and tolerance of automotive load-dump transients up to 80 V without external protection components. This specification is guaranteed across the full –40°C to +125°C operating temperature range and applies to both SOIC-8 and VSSOP-8 package variants of INA282AQDRQ1.
Does the INA282AQDRQ1 support bidirectional current measurement?
Yes, the INA282AQDRQ1 supports bidirectional current sensing through configurable REF1 and REF2 pins, which allow setting the output quiescent voltage anywhere between 0 V and V+. When biased at mid-supply (e.g., 2.5 V on 5 V), the device outputs voltage proportional to current direction-positive for forward flow, negative relative to bias for reverse flow. This capability is fully documented in the INA282AQDRQ1 datasheet Section 7.4.1.2.
What package options are available for the INA282AQDRQ1?
The INA282AQDRQ1 is offered in two RoHS-compliant packages: SOIC-8 (D package, 4.90 mm × 3.91 mm body) and VSSOP-8 (DGK package, 3.00 mm × 3.00 mm body). Both packages share identical pinout, electrical specifications, and thermal metrics per TI SBOS554C, with RθJA of 134.9°C/W (SOIC) and 164.1°C/W (VSSOP). The part number suffix "AQDRQ1" denotes the automotive-grade VSSOP-8 variant.
Is the INA282AQDRQ1 qualified for automotive safety-critical systems?
Yes, the INA282AQDRQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), with documented HBM ±2 kV and CDM ±750 V ESD ratings. Texas Instruments provides functional safety documentation-including FIT rate data, failure mode analysis, and diagnostic coverage guidance-to support ISO 26262 ASIL-B system integration. This makes INA282AQDRQ1 suitable for use in automotive safety-critical applications such as battery management and electronic stability control.
What is the typical quiescent current consumption of the INA282AQDRQ1?
The INA282AQDRQ1 draws a maximum of 900 μA quiescent current across its full operating range (2.7 V to 18 V supply, –40°C to +125°C), with typical consumption of 600–750 μA depending on supply voltage and common-mode conditions. This low power draw enables integration into always-on vehicle modules-such as battery disconnect units and precharge controllers-without compromising system-level energy budgets. All values are measured and specified in the INA282AQDRQ1 electrical characteristics table (Section 6.5).
INA282AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- ±0.4%
- Voltage - Input:
- -14V ~ 80V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA282AQDRQ1 FAQ
1.How can I place an order for INA282AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA282AQDRQ1 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 INA282AQDRQ1 reliable?
The price and inventory of INA282AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA282AQDRQ1 is usually 5 days.
3.What payment methods are accepted for INA282AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA282AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA282AQDRQ1?
INA282AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA282AQDRQ1 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 INA282AQDRQ1?
For technical support, including INA282AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA282AQDRQ1 requirements.
6.How does Aetrix verify that INA282AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA282AQDRQ1 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 INA282AQDRQ1 meets industry standards.
7.What is the process for return or replacement of INA282AQDRQ1?
All INA282AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA282AQDRQ1, 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 INA282AQDRQ1 part is unused and in its original packaging.
Return procedure for INA282AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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