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Texas Instruments INA241B2QDGKRQ1
- Part No.:
- INA241B2QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241B2QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,300
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Product details
Overview
INA241B2QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) bidirectional current sense amplifier with 20V/V gain, −5V to 110V operational common-mode range, ±150µV max input offset voltage, and 1.1MHz bandwidth-designed for high-accuracy motor phase current monitoring in electric power steering (EPS) systems.
For engineers reviewing the INA241B2QDGKRQ1 datasheet, INA241B2QDGKRQ1 pinout, INA241B2QDGKRQ1 application, or INA241B2QDGKRQ1 equivalent, this page delivers verified specifications, validated SOT-23-8 pin functions, automotive-grade thermal performance data, and direct alternatives for EPS, eTurbo, and regenerative braking designs.
Technical Context
The INA241B2QDGKRQ1 employs a zero-drift, high-common-mode topology with integrated PWM rejection circuitry that suppresses output disturbance during fast ΔV/Δt transients up to 125kHz. Its dual-reference inputs (REF1/REF2) enable flexible output level shifting across the full supply range (2.7V–20V).
It achieves 104dB AC-CMRR at 100kHz and 89dB at 1MHz while maintaining ±0.1% gain error and ±5ppm/°C drift-enabling stable bidirectional current measurement in switching motor drives where bus voltage swings from −5V to 110V and load currents reverse polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 2V per 100mV shunt drop, optimizing dynamic range for 50A–200A motor phase sensing. |
| Common-mode range | −5V to 110V - supports high-side, low-side, and inline sensing in 48V/60V automotive buses without level-shifting. |
| Input offset voltage | ±150µV max - limits current measurement error to ≤±0.15mΩ at 100A with 100µΩ shunt. |
| Bandwidth | 1.1MHz - captures overcurrent events within 1µs settling time to 1%, critical for IGBT/SiC gate protection. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/15V analog rails in EPS ECUs. |
| Quiescent current | 2.5mA - enables always-on current monitoring in safety-critical subsystems with minimal power penalty. |
| AC CMRR @ 100kHz | 104dB - rejects PWM-induced noise from 20kHz–125kHz switching frequencies in motor inverters. |
Pinout & Package
INA241B2QDGKRQ1 is packaged in an 8-pin SOT-23 (DDF) with 2.9mm × 2.8mm footprint, optimized for high-density automotive PCB layouts and thermally constrained EPS control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative input | Connects to load side of shunt in high-side config or ground side in low-side config; handles −5V to 110V common-mode. |
| GND (Pin 2) | Ground reference | System ground return for internal biasing; must be low-impedance path to minimize measurement error. |
| REF2 (Pin 3) | Reference input | Adjusts output baseline; connect to 0V–VS to shift output between GND and VS for ADC interfacing. |
| NC (Pin 4) | No-connect | Reserved terminal; must be tied to GND per TI design guidelines to ensure stability. |
| OUT (Pin 5) | Analog output | Delivers amplified, bidirectional current signal; drives 10kΩ loads with rail-to-rail swing (VS − 0.2V min). |
| VS (Pin 6) | Power supply | Accepts 2.7V–20V; decoupling capacitor required at pin for PWM rejection integrity. |
| REF1 (Pin 7) | Reference input | Paired with REF2 to define output center point; differential reference improves PSRR and noise immunity. |
| IN+ (Pin 8) | Positive input | Connects to bus-voltage side of shunt in high-side config or load side in low-side config; matched to IN−. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation in EPS and brake control units per automotive reliability standards. |
| Enhanced PWM rejection | Suppresses output disturbance during 125kHz PWM edges via internal transient hold-off and high AC-CMRR. |
| Bidirectional measurement | Accurately resolves forward and reverse current flow using single-ended output referenced to programmable REF pins. |
| Survival voltage rating | Withstands −20V to 120V fault conditions without latch-up-critical for 48V system load dump protection. |
| Zero-drift architecture | Maintains ±150µV offset and ±0.1% gain error across temperature, eliminating calibration drift in long-life modules. |
Applications
| Electric Power Steering (EPS) | eTurbo / Electric Turbocharger |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase brushless motor drivers for torque assist control. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth and 1µs settling for overcurrent shutdown. Use Value: Enables <10µs fault response time under 125kHz PWM commutation, meeting ISO 26262 ASIL-B timing requirements. |
Use Scenario: Motor winding current sensing in 48V eTurbo actuators subject to rapid bus transients during boost mode transitions. IC Role / Device Role / Timing Role: Common-mode resilient amplifier rejecting >100V/µs transients at motor terminals while preserving signal fidelity. Use Value: Delivers stable 20V/V output despite −5V to 110V VCM swings, eliminating need for external isolation or filtering. |
| Starter/Generator (BSG) | Regenerative Braking System |
|
Use Scenario: Bidirectional battery current measurement during engine start-stop and generator charging cycles in 48V mild-hybrid systems. IC Role / Device Role / Timing Role: Precision current sensor with ±150µV offset and ±0.1% gain error enabling <0.5% SOC estimation accuracy. Use Value: Supports accurate energy accounting over 15-year vehicle lifetime without recalibration due to zero-drift architecture. |
Use Scenario: Inverter phase current feedback in regenerative braking inverters operating at 20kHz–80kHz PWM frequencies. IC Role / Device Role / Timing Role: High-bandwidth, high-CMRR amplifier rejecting common-mode noise from IGBT switching to prevent false overcurrent trips. Use Value: Maintains 104dB AC-CMRR at 100kHz, ensuring clean current waveform capture for torque vectoring algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDGKRQ1 | Same 20V/V gain and SOT-23-8 package, but ±120µV max offset and 100kHz bandwidth; lacks enhanced PWM rejection. | Lower-cost option for non-PWM-intensive applications like battery monitoring; unsuitable for 125kHz motor drives. | Select when cost sensitivity outweighs need for fast transient immunity in EPS or eTurbo. |
| MAX40056ATA+T | 20V/V gain, −4V to 65V common-mode, ±100µV offset, 1.5MHz bandwidth; not AEC-Q100 qualified. | Valid for industrial motor control but requires additional qualification effort for automotive deployment. | Consider only for non-safety-critical prototypes or non-automotive EV subsystems. |
Compared with INA241B2QDGKRQ1, INA240A2QDGKRQ1 trades PWM rejection and thermal grade for lower cost, while MAX40056ATA+T offers higher bandwidth but no automotive qualification-making INA241B2QDGKRQ1 the sole choice for production-grade EPS and brake systems requiring ASIL-compliant current sensing.
Availability
INA241B2QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo actuation, and regenerative braking systems requiring stable component supply across multi-year automotive production programs.
Supply support for INA241B2QDGKRQ1 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 INA241x-Q1 product line was engineered specifically for high-reliability, high-precision current sensing in automotive electrification systems-including EPS, BSG, and brake-by-wire-where wide common-mode range and PWM immunity are mandatory.
FAQ
What is the maximum common-mode voltage the INA241B2QDGKRQ1 can withstand during normal operation?
The INA241B2QDGKRQ1 operates continuously across a common-mode input range of −5V to 110V. This allows direct connection to high-side motor phases in 48V and 60V automotive architectures without external level-shifting circuitry. Its survival rating extends to −20V to 120V, providing margin against load-dump transients.
Does the INA241B2QDGKRQ1 support bidirectional current measurement, and how is polarity indicated?
Yes, the INA241B2QDGKRQ1 supports true bidirectional current sensing. Polarity is encoded in the output voltage relative to the REF1/REF2 reference midpoint: output above the reference indicates current flow in one direction; below indicates reverse flow. This eliminates need for dual-supply or external inversion circuitry.
What packaging and thermal characteristics apply to the INA241B2QDGKRQ1?
The INA241B2QDGKRQ1 uses the DDF (SOT-23-8) package with 2.9mm × 2.8mm footprint and 129.7°C/W junction-to-ambient thermal resistance. It is rated for −40°C to 125°C ambient operation (Grade 1), making it suitable for placement near motor driver MOSFETs in EPS control modules.
How does the enhanced PWM rejection feature of the INA241B2QDGKRQ1 function in practice?
The INA241B2QDGKRQ1 holds its output stable for 1µs during large common-mode transients (e.g., IGBT switching edges), then relies on 104dB AC-CMRR at 100kHz to attenuate residual noise. This two-stage mechanism ensures clean current waveforms even at 125kHz PWM frequencies used in modern SiC-based motor drives.
What are the key differences between the INA241A2QDGKRQ1 and INA241B2QDGKRQ1 variants?
The INA241B2QDGKRQ1 features ±150µV max input offset voltage and ±0.1% max gain error-optimized for cost-sensitive automotive applications where ultra-high precision is not required. In contrast, the INA241A2QDGKRQ1 offers ±10µV offset and ±0.01% gain error for premium-tier systems demanding highest accuracy.
INA241B2QDGKRQ1 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:
- 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:
- 8-VSSOP
INA241B2QDGKRQ1 FAQ
1.How can I place an order for INA241B2QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B2QDGKRQ1 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 INA241B2QDGKRQ1 reliable?
The price and inventory of INA241B2QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B2QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B2QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B2QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B2QDGKRQ1?
INA241B2QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B2QDGKRQ1 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 INA241B2QDGKRQ1?
For technical support, including INA241B2QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B2QDGKRQ1 requirements.
6.How does Aetrix verify that INA241B2QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B2QDGKRQ1 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 INA241B2QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B2QDGKRQ1?
All INA241B2QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B2QDGKRQ1, 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 INA241B2QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241B2QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B2QDGKRQ1 Tags
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LM358DT
STMicroelectronics
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Texas Instruments
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MCP6006T-E/OT
Microchip Technology
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Texas Instruments
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