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Texas Instruments INA241B4QDRQ1
- Part No.:
- INA241B4QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241B4QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA241B4QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) bidirectional current sense amplifier with 100V/V gain, −5V to 110V common-mode input range, ±0.1% max gain error, ±150µV max offset voltage, and 1.1MHz bandwidth - designed for high-precision motor phase current monitoring in electric power steering (EPS) systems.
For engineers reviewing the INA241B4QDRQ1 datasheet, INA241B4QDRQ1 pinout, INA241B4QDRQ1 application, or INA241B4QDRQ1 equivalent, this page delivers verified specifications, automotive-grade thermal and PWM rejection performance, package-specific pin functions, and real-world use cases in high-voltage switching motor control.
Technical Context
The INA241B4QDRQ1 employs a zero-drift, high-common-mode topology with integrated enhanced PWM rejection circuitry that suppresses output disturbance during fast ΔV/Δt transients up to 125kHz. Its input stage operates independently of supply voltage, enabling accurate sensing at VCM = −5V to 110V while powered from 2.7V–20V.
It delivers 1.1MHz small-signal bandwidth and 8V/µs slew rate across all gains, with 1µs settling time to 1% and 166dB DC CMRR. The dual reference inputs (REF1/REF2) allow flexible output level shifting for bidirectional current measurement without external op-amps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 100× sensed differential voltage; enables 10mΩ shunt use with ±50A range at 5V supply. |
| Common-Mode Range | −5V to 110V - supports high-side, low-side, and inline sensing in 48V/60V automotive bus systems beyond supply rails. |
| Gain Error (max) | ±0.1% - ensures ≤5mV error at 5V output; critical for torque accuracy in EPS closed-loop control. |
| Offset Voltage (max) | ±150µV - contributes ≤1.5mA error on 10mΩ shunt; meets ISO 26262 ASIL-B current measurement requirements. |
| Bandwidth | 1.1MHz - captures fast overcurrent events in <1µs; sufficient for 100kHz PWM motor drive sampling. |
| Supply Range | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/24V vehicle power; draws only 2.5mA quiescent current. |
| PWM Rejection | Up to 125kHz - holds output stable for 1µs during common-mode edge, then attenuates residual via 104dB AC CMRR at 100kHz. |
Pinout & Package
SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, surface-mount, thermally enhanced for automotive under-hood operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connect to load or ground side of shunt; accepts −5V to 110V common-mode; bias current 35µA typical. |
| GND (Pin 2) | Analog ground reference | System ground return for internal circuitry; must be low-impedance path to minimize noise coupling. |
| REF2 (Pin 3) | Reference voltage input | Adjusts output common-mode level; connect to 0V–VS to set bidirectional zero-current output (e.g., 2.5V for ±2.5V swing). |
| NC (Pin 4) | No-connect terminal | Reserved; must be connected to GND per datasheet to ensure stability and EMI performance. |
| OUT (Pin 5) | Amplified output | Delivers 100×(IN+ − IN−) + (REF1 + REF2)/2; rail-to-rail capable (VS − 0.2V min, 8mV above GND). |
| VS (Pin 6) | Power supply input | 2.7V–20V analog supply; decoupling capacitor required within 1cm of pin for PWM rejection integrity. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output center point; differential reference rejection ratio is ±20µV/V max. |
| IN+ (Pin 8) | Positive current-sense input | Connect to bus or load side of shunt; matched to IN− for 166dB DC CMRR; withstands 120V survival rating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation with full parametric guarantee - suitable for EPS module placement near steering rack. |
| Enhanced PWM rejection | Suppresses output disturbance during 125kHz switching edges via 1µs hold + high AC CMRR - eliminates need for external filtering in motor gate-drive feedback loops. |
| Bidirectional sensing architecture | Dual reference inputs (REF1/REF2) enable true zero-centered output (e.g., 2.5V = 0A) without external components - simplifies ADC interfacing in 12-bit+ systems. |
| Ultra-low offset drift | ±0.5µV/°C max - limits temperature-induced current error to <60mA over −40°C to 125°C on 10mΩ shunt, meeting ASIL-B diagnostic coverage targets. |
| High-speed transient response | 1µs settling to 1% with 8V/µs slew rate - captures sub-millisecond overcurrent faults before IGBT latch-up or MOSFET thermal runaway. |
Applications
| Electric Power Steering (EPS) | eTurbo / Electric Turbocharger |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase brushless motor driver for assist torque calculation and fault detection. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier placed on each motor leg; samples at ≥100kSPS with <1µs latency. Use Value: Enables precise field-oriented control (FOC) with <0.5% current error across temperature, improving steering responsiveness and reducing acoustic noise. |
Use Scenario: Monitoring boost motor current in 48V eTurbo actuator to regulate turbine speed and prevent overspeed conditions. IC Role / Device Role / Timing Role: Low-side shunt amplifier with 100V/V gain feeding 16-bit SAR ADC; handles 110V common-mode during regenerative braking transients. Use Value: Maintains measurement integrity during 100kHz PWM switching and >50V/µs dV/dt events, eliminating false overcurrent trips. |
| Starter/Generator (Belt-Driven Starter Generator) | Regenerative Braking System |
Use Scenario: Bidirectional current sensing on 48V starter-generator in-stop-start and energy recovery modes. IC Role / Device Role / Timing Role: Inline shunt amplifier with REF1/REF2 biased to mid-supply; outputs ±2.5V for 0–±250A range. Use Value: ±150µV offset ensures <1.5A zero-current error at 125°C, enabling accurate state-of-charge estimation during charge/discharge transitions. |
Use Scenario: Motor current feedback during high-dV/dt regen events where bus voltage spikes to 80V+ during rapid deceleration. IC Role / Device Role / Timing Role: High-side amplifier with −5V to 110V VCM range; rejects common-mode transients without signal degradation. Use Value: 104dB AC CMRR at 100kHz prevents erroneous brake torque reduction commands caused by PWM coupling into sense path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDRQ1 | Same 100V/V gain, but ±0.2% gain error (vs. ±0.1%), ±200µV offset (vs. ±150µV), no Grade 0 option. | Limited to Grade 1 (−40°C to 125°C); lower precision suits cost-sensitive EPS variants where <1% current error is acceptable. | Select when budget constraints outweigh need for tight torque loop accuracy; requires same PCB layout. |
| MAX40056ATA+T | 100V/V gain, −4V to 110V VCM, ±0.3% gain error, ±300µV offset, 2.5MHz BW - higher bandwidth but lower DC precision. | Optimized for ultra-fast overcurrent protection (OCP) rather than closed-loop FOC; lacks dual-reference architecture for true bidirectional zeroing. | Choose for safety-critical OCP-only paths where speed > accuracy; not drop-in due to different pinout and reference scheme. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA241B4QDRQ1 provides superior DC accuracy and integrated bidirectional zeroing - making it optimal for torque-critical EPS and eTurbo control where <0.5% current error directly impacts functional safety compliance.
Availability
INA241B4QDRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo actuation, starter/generator control, and regenerative braking systems requiring stable component supply across automotive production lifecycles.
Supply support for INA241B4QDRQ1 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 automotive-grade signal conditioning and functional safety design.
The INA241x-Q1 product line was developed specifically for high-precision, high-CMRR current sensing in AEC-Q100-compliant motor control and battery management systems - emphasizing PWM rejection, wide VCM, and ASIL-ready parametric stability.
FAQ
What is the maximum common-mode voltage the INA241B4QDRQ1 can handle during continuous operation?
The INA241B4QDRQ1 supports −5V to 110V common-mode input voltage during normal operation, with a survival rating of −20V to 120V. This allows reliable use in 48V and 60V automotive systems, including high-side sensing on battery rails during load dump or regenerative events. The device maintains full specification compliance across this range when powered from 2.7V–20V.
Does the INA241B4QDRQ1 require external components for bidirectional current measurement?
No, the INA241B4QDRQ1 does not require external components for bidirectional operation. Its dual reference inputs (REF1 and REF2) allow direct configuration of the output center point - for example, connecting REF1 to VS and REF2 to GND yields a 0.5×VS output at zero current. This eliminates external op-amps or level-shifters needed by legacy amplifiers, reducing BOM count and layout complexity.
How does the enhanced PWM rejection in the INA241B4QDRQ1 improve system reliability in motor drives?
The INA241B4QDRQ1's enhanced PWM rejection holds its output stable for 1µs during large common-mode transients and achieves 104dB AC CMRR at 100kHz. This prevents false overcurrent detection during 125kHz PWM switching in EPS or eTurbo inverters - avoiding unnecessary shutdowns, torque interruption, or mis-triggered safety states that would otherwise degrade drivability and functional safety metrics.
What is the guaranteed gain error specification for the INA241B4QDRQ1 over temperature?
The INA241B4QDRQ1 has a maximum gain error of ±0.1% over the full operating temperature range of −40°C to 125°C, with a drift of ±5ppm/°C. This means total gain error remains within ±0.15% across temperature - critical for maintaining consistent torque output in EPS systems where gain variation directly impacts assist calibration and ASIL-B diagnostic coverage requirements.
Which package options are available for the INA241B4QDRQ1, and which is used in the DDF variant?
The INA241B4QDRQ1 is offered in SOT-23-8 (DDF), VSSOP-8 (DGK), SOIC-8 (D), and VSSOP-10 (DGS) packages. The "QDRQ1" suffix specifically denotes the SOT-23-8 (DDF) variant - a 2.9mm × 2.8mm surface-mount package optimized for space-constrained EPS modules and thermally robust under-hood environments.
INA241B4QDRQ1 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
- 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-SOIC
INA241B4QDRQ1 FAQ
1.How can I place an order for INA241B4QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B4QDRQ1 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 INA241B4QDRQ1 reliable?
The price and inventory of INA241B4QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B4QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B4QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B4QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B4QDRQ1?
INA241B4QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B4QDRQ1 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 INA241B4QDRQ1?
For technical support, including INA241B4QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B4QDRQ1 requirements.
6.How does Aetrix verify that INA241B4QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B4QDRQ1 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 INA241B4QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B4QDRQ1?
All INA241B4QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B4QDRQ1, 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 INA241B4QDRQ1 part is unused and in its original packaging.
Return procedure for INA241B4QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B4QDRQ1 Tags
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