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Texas Instruments INA284AQDRQ1
- Part No.:
- INA284AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA284AQDRQ1.pdf
- Description:
- IC CURRENT MONITOR 0.4% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,015
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Product details
Overview
INA284AQDRQ1 from Texas Instruments is an automotive-grade, bidirectional voltage-output current shunt monitor with 500 V/V gain, –14 V to +80 V common-mode input range, ±20 μV offset voltage, 140 dB CMRR, and 900 μA max quiescent current. It enables high-accuracy low-side or high-side current sensing in EV battery management systems where shunt voltage drops as low as 10 mV full-scale must be resolved.
For engineers reviewing the INA284AQDRQ1 datasheet, INA284AQDRQ1 pinout, INA284AQDRQ1 application, or INA284AQDRQ1 equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive operating conditions (–40°C to +125°C), exact gain and drift specifications, and real-world functional alternatives for AEC-Q100-compliant designs.
Technical Context
The INA284AQDRQ1 uses a zero-drift architecture to achieve ±20 μV offset and 0.3 μV/°C offset drift over –40°C to +125°C, enabling accurate measurement of sub-100-mV shunt voltages. Its switched-capacitor input structure delivers 140 dB CMRR but introduces discrete-time step response behavior with settling within 15 μs after common-mode transients.
It supports unidirectional or bidirectional operation via REF1/REF2 pins, allowing output biasing from GND to V+ (up to 9 V referenced to GND). The device operates from 2.7 V to 18 V supply and maintains 500 V/V gain across its full common-mode range without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 V/V - scales 10-mV shunt drop to 5-V output, enabling high-resolution ADC interfacing with minimal signal conditioning |
| Common-Mode Range | –14 V to +80 V - supports direct connection to 12-V/48-V battery rails and withstands automotive load-dump transients up to 80 V |
| Offset Voltage | ±20 μV - ensures ≤0.2% error at 10-mV full-scale shunt voltage, critical for low-power, high-efficiency current monitoring |
| CMRR | 140 dB - rejects >100-V common-mode noise while measuring millivolt-level differential signals in noisy automotive environments |
| Quiescent Current | 900 μA max - allows integration into always-on vehicle subsystems (e.g., battery SOC monitoring) without excessive standby power penalty |
| Temp Range | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and traction inverter applications |
| Gain Error | ±1.4% max - guarantees end-of-life accuracy without calibration in production ECUs |
| Offset Drift | 0.3 μV/°C - limits total offset shift to <45 μV across full temperature range, preserving low-current measurement fidelity |
Pinout & Package
INA284AQDRQ1 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 functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: –IN | Analog input | Connects to negative side of shunt resistor; forms differential pair with +IN to sense current direction and magnitude |
| 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 of two matched inputs setting output DC bias; used with REF1 to configure unidirectional or bidirectional operation |
| 4: NC | No connect | Internally unconnected; may be left floating or tied to GND to reduce parasitic coupling |
| 5: OUT | Analog output | Voltage output proportional to shunt voltage × 500; drives ADC inputs or comparator stages with 1.5-Ω output impedance |
| 6: V+ | Power supply | Single 2.7–18-V supply; powers internal amplifier and reference circuitry; decoupling capacitor required near pin |
| 7: REF1 | Analog reference input | Matches REF2; average of REF1/REF2 sets output quiescent voltage (0 V to 9 V relative to GND) |
| 8: +IN | Analog input | Connects to positive side of shunt resistor; differential input with –IN determines current polarity and magnitude |
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 reliability requirements without derating |
| Zero-drift architecture | Enables 10-mV full-scale shunt sensing with <0.2% total error - reduces shunt power loss by 10× versus 100-mV conventional designs |
| Bidirectional current sensing | Configurable output bias via REF1/REF2 allows true bipolar measurement (e.g., regenerative braking current in EV inverters) |
| Integrated transient protection | Withstands –14-V reverse-battery and +80-V load-dump events without external TVS - simplifies BOM and PCB layout in 12-V/48-V systems |
| Reference voltage rejection | RVRR ≤ ±25 μV/V for INA284AQDRQ1 - ensures stable output when REF1/REF2 are driven from noisy or shared reference sources |
| Low supply current | 900 μA max at 125°C - supports always-on monitoring in battery disconnect units and precharge controllers without thermal compromise |
Applications
| EV Battery Management | Electric Power Steering |
|---|---|
Use Scenario: Monitoring pack-level charge/discharge current in 400-V traction battery modules during fast charging and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional current shunt monitor interfaced to isolated ΣΔ ADC, providing real-time SOC/SOH data with <0.5% full-scale accuracy. Use Value: Enables precise coulomb counting over full temperature range using only a 1-mΩ shunt, reducing thermal stress and improving system efficiency. | Use Scenario: Sensing motor phase current in 12-V EPS control units to enable torque vectoring and fault detection during steering assist. IC Role / Device Role / Timing Role: High-side current monitor feeding MCU ADC, delivering 100-kSPS sampled current data synchronized to PWM switching. Use Value: Supports ISO 26262 ASIL-B compliance via built-in diagnostics (reference monitoring, supply supervision) and guaranteed gain stability over life. |
| Brake Systems | Body Control Modules |
Use Scenario: Measuring solenoid coil current in electro-hydraulic brake (EHB) actuators to validate actuation timing and detect open/short faults. IC Role / Device Role / Timing Role: Unidirectional high-side monitor with GND-referenced output, providing fast-response current feedback to safety MCU. Use Value: Achieves <10-μs fault detection latency due to 4-kHz effective bandwidth and rail-to-rail output swing, meeting ASIL-D timing constraints. | Use Scenario: Monitoring fuse current in 12-V body domain controllers to detect overload, short-circuit, or aging-related resistance increase. IC Role / Device Role / Timing Role: Low-side current monitor with V+-referenced output, enabling wake-up on overcurrent event without MCU intervention. Use Value: Reduces system standby power by eliminating need for separate supervisor IC - quiescent current remains <1 mA across full temp range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sensing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA286AQDRQ1 | 100 V/V gain, lower bandwidth (10 kHz), higher CMRR (150 dB), same package and temp grade | Better suited for high-precision, low-gain applications requiring wider dynamic range (e.g., 100-mV shunts in 48-V systems) | Select when full-scale shunt voltage exceeds 25 mV and ultra-low noise (<110 nV/√Hz) is prioritized over gain magnitude |
| MAX40056ATA+T | 500 V/V gain, –5 V to +65 V common-mode, ±15 μV offset, 1.2 mA IQ, TDFN-8 package | Higher supply current and narrower common-mode range limit use in 80-V load-dump scenarios; lacks AEC-Q100 Grade 1 certification | Consider only for non-automotive industrial applications where footprint reduction (2.5 mm × 2.5 mm) outweighs automotive qualification requirements |
Compared with INA284AQDRQ1, INA286AQDRQ1 offers superior CMRR and lower noise but requires larger shunt voltage for equivalent output swing, while MAX40056ATA+T provides smaller package size at the cost of missing AEC-Q100 qualification and reduced transient immunity - making INA284AQDRQ1 the optimal choice for production automotive current sensing where 500× gain, 80-V fault tolerance, and Grade 1 reliability are mandatory.
Availability
INA284AQDRQ1 is available at Aetrix Electronics and suitable for EV battery management, electric power steering, and brake systems requiring stable component supply across multi-year automotive production cycles.
Supply support for INA284AQDRQ1 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 design.
The INA28x-Q1 product line was developed specifically for AEC-Q100-compliant current sensing in high-voltage automotive subsystems, emphasizing zero-drift precision, wide common-mode operation, and integrated fault resilience.
FAQ
What is the maximum common-mode voltage the INA284AQDRQ1 can handle?
The INA284AQDRQ1 supports a common-mode input voltage range of –14 V to +80 V. This allows direct connection to 12-V and 48-V battery rails and enables survival of automotive load-dump transients up to +80 V without external protection components. The specification is validated across the full –40°C to +125°C operating temperature range per AEC-Q100 Grade 1 requirements.
Does the INA284AQDRQ1 require external calibration for automotive production use?
No, the INA284AQDRQ1 does not require external calibration in production. Its ±1.4% maximum gain error and ±20 μV offset voltage are specified over temperature and time, and its 0.3 μV/°C offset drift ensures total error remains within 0.5% full-scale across –40°C to +125°C. These parameters meet ASIL-B diagnostic coverage requirements for current sensing in battery management and EPS systems.
Can the INA284AQDRQ1 be used for bidirectional current measurement in regenerative braking circuits?
Yes, the INA284AQDRQ1 supports true bidirectional current sensing. By applying matched reference voltages to REF1 and REF2 (e.g., 2.5 V each with 5-V supply), the output quiescent point is set to mid-scale, allowing symmetric positive and negative output swings corresponding to forward and reverse current flow - essential for accurate energy recovery measurement in EV inverter phases.
What package options are available for the INA284AQDRQ1?
The INA284AQDRQ1 is offered in two industry-standard packages: SOIC-8 (4.90 mm × 3.91 mm) and VSSOP-8 (3.00 mm × 3.00 mm). Both packages share identical pinout, electrical specifications, and AEC-Q100 qualification. The VSSOP-8 variant is preferred for space-constrained applications such as compact EPS motor drivers, while SOIC-8 facilitates manual assembly and thermal relief in high-power modules.
How does the zero-drift architecture of the INA284AQDRQ1 improve shunt-based current sensing?
The zero-drift architecture of the INA284AQDRQ1 achieves ±20 μV offset and 0.3 μV/°C drift, enabling accurate measurement of shunt voltage drops as low as 10 mV full-scale. This reduces shunt power dissipation by 10× compared to conventional 100-mV designs, lowers thermal stress on PCB traces, and improves system efficiency - especially critical in always-on battery monitoring and high-density power modules.
INA284AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- 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
INA284AQDRQ1 FAQ
1.How can I place an order for INA284AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA284AQDRQ1 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 INA284AQDRQ1 reliable?
The price and inventory of INA284AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA284AQDRQ1 is usually 5 days.
3.What payment methods are accepted for INA284AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA284AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA284AQDRQ1?
INA284AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA284AQDRQ1 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 INA284AQDRQ1?
For technical support, including INA284AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA284AQDRQ1 requirements.
6.How does Aetrix verify that INA284AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA284AQDRQ1 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 INA284AQDRQ1 meets industry standards.
7.What is the process for return or replacement of INA284AQDRQ1?
All INA284AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA284AQDRQ1, 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 INA284AQDRQ1 part is unused and in its original packaging.
Return procedure for INA284AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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