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Texas Instruments INA241A5QDRQ1
- Part No.:
- INA241A5QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241A5QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:4,746
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Product details
Overview
INA241A5QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier optimized for high-voltage motor control and regenerative braking systems. It delivers 200V/V fixed gain, ±0.015% max gain error, ±8µV max input offset voltage, and 1.1MHz bandwidth across −5V to 110V common-mode range - enabling accurate inline current measurement in eTurbo and EPS inverters.
For engineers reviewing the INA241A5QDRQ1 datasheet, INA241A5QDRQ1 pinout, INA241A5QDRQ1 application, or INA241A5QDRQ1 equivalent, key selection criteria include PWM rejection up to 125kHz, 1µs 1% settling time, 166dB DC CMRR, and SOT23-8 package compatibility with space-constrained automotive power stages.
Technical Context
The INA241A5QDRQ1 employs a zero-drift, multistage amplifier topology with integrated enhanced PWM rejection circuitry that holds output for 1µs during large ΔV/Δt common-mode transients-then relies on 1.1MHz bandwidth and 104dB AC CMRR at 100kHz to suppress residual disturbances. Its input stage operates independently of supply voltage, supporting common-mode voltages beyond VS (up to 110V) while maintaining ±8µV offset and ±0.015% gain error.
This architecture enables precise bidirectional sensing in switching systems where high dV/dt noise from IGBT/MOSFET gate drivers couples onto shunt resistor nodes. The dual reference inputs (REF1/REF2) allow flexible output level shifting from GND to VS, supporting both unidirectional and bipolar current monitoring without external op-amps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - sets full-scale output to 4V for 20mV shunt drop; enables high-resolution current measurement with minimal PCB layout sensitivity. |
| Common-mode range | −5V to 110V - supports direct high-side sensing in 48V/60V battery systems and regenerative braking with negative voltage recovery. |
| Input offset voltage | ±8µV max - contributes ≤0.04% error at 20mV sense voltage; critical for low-current detection in EPS standby modes. |
| Bandwidth | 1.1MHz - captures fast overcurrent events in <1µs; sufficient for 125kHz PWM edge detection without phase lag. |
| CMRR | 166dB DC / 104dB at 100kHz - rejects bus noise coupling into shunt node; maintains accuracy during IGBT switching transitions. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V logic rails and 12V/15V analog supplies in automotive ECUs. |
| Quiescent current | 2.5mA - enables always-on current monitoring in safety-critical subsystems without excessive thermal load. |
Pinout & Package
SOT23-8 package (2.9mm × 2.8mm), thermally enhanced for automotive under-hood operation. Pinout validated per TI SBOSA31D Rev D (June 2025).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense amplifier negative input | Connect to load side in high-side configuration or ground side in low-side configuration; 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 voltage input | Adjusts output common-mode level; connect to 0V–VS to set output baseline for ADC interfacing. |
| NC (Pin 4) | No-connect terminal | Reserved; must be connected to GND per datasheet to ensure stability and EMI performance. |
| OUT (Pin 5) | Analog output | 200×(IN+ − IN−) + (REF1 + REF2)/2; rail-to-rail swing (VS − 0.2V min) into 10kΩ load. |
| VS (Pin 6) | Power supply | 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 offset; differential reference rejection ratio >100dB minimizes supply noise coupling. |
| IN+ (Pin 8) | Current-sense amplifier positive input | Connect to bus-voltage side in high-side configuration or load side in low-side configuration; matched to IN− for CMRR. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | 1µs output hold + 125kHz transient immunity - eliminates false overcurrent triggers during gate driver switching edges. |
| Bidirectional operation | True symmetric sensing from −5V to 110V common-mode - enables regenerative braking current direction detection without polarity reversal. |
| Ultra-low offset drift | ±0.1µV/°C - ensures <1µV total drift over −40°C to 125°C; maintains calibration stability across vehicle thermal cycles. |
| High-speed settling | 1µs to 1% - meets ISO 26262 ASIL-B timing requirements for fault response in electric power steering. |
| AEC-Q100 Grade 1 | Qualified from −40°C to 125°C ambient - validated for engine bay and transmission control module environments. |
Applications
| eTurbo/Charger Control | Electric Power Steering (EPS) |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 48V eTurbo inverter during boost and regeneration modes. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth and 125kHz PWM rejection. Use Value: Enables precise torque control and overcurrent shutdown within 1µs, preventing IGBT destruction during transient load spikes. |
Use Scenario: Motor phase current feedback in dual-motor EPS for assist torque calculation and fault detection. IC Role / Device Role / Timing Role: Low-drift (±8µV), high-CMRR (166dB) current amplifier operating from −5V to 110V common-mode. Use Value: Maintains <0.1% current measurement accuracy across temperature, ensuring consistent steering feel and functional safety compliance. |
| Starter/Generator System | Brake System (EMB) |
|
Use Scenario: Bidirectional current sensing in 48V starter-generator during cranking (high surge) and regenerative charging. IC Role / Device Role / Timing Role: 200V/V gain amplifier with survival rating to −20V/120V and 1µs settling for rapid fault isolation. Use Value: Supports seamless mode transition between start and generate functions without recalibration or signal conditioning. |
Use Scenario: Caliper motor current monitoring in electromechanical brake (EMB) actuators for clamping force control. IC Role / Device Role / Timing Role: AEC-Q100 qualified current sense amplifier with functional safety documentation support. Use Value: Provides ASIL-D ready current data for brake-by-wire control loops, reducing need for redundant sensing hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDRQ1 | Same 200V/V gain but ±0.2% max gain error and ±150µV offset; no enhanced PWM rejection circuitry. | Limited to lower-frequency (<50kHz) motor drives; unsuitable for eTurbo or high-dV/dt EMB systems. | Select when cost sensitivity outweighs PWM noise immunity and ultra-precision requirements. |
| MAX40056ATA+T | 200V/V gain, 1.5MHz bandwidth, but only −2V to 65V common-mode range and no AEC-Q100 qualification. | Restricted to 12V/24V non-automotive industrial drives; lacks automotive temperature grade and functional safety support. | Choose for commercial-grade 24V servo systems where extended common-mode range is not required. |
Compared with INA240A5QDRQ1 and MAX40056ATA+T, the INA241A5QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 125kHz PWM rejection, and ±8µV offset in SOT23-8 - making it the only option for space-constrained, high-dV/dt automotive traction and braking subsystems.
Availability
INA241A5QDRQ1 is available at Aetrix Electronics and suitable for eTurbo control, electric power steering, and brake system applications requiring stable component supply across automotive production lifecycles.
Supply support for INA241A5QDRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive-grade precision analog solutions.
The INA241x-Q1 product line was designed specifically for high-reliability automotive current sensing in electrified powertrains - emphasizing AEC-Q100 qualification, enhanced PWM immunity, and ultra-low drift across extended temperature ranges.
FAQ
What is the maximum common-mode voltage the INA241A5QDRQ1 can withstand during continuous operation?
The INA241A5QDRQ1 supports a continuous operational common-mode voltage range of −5V to 110V. Its survival rating extends to −20V to 120V, allowing brief exposure to transients such as load dump or inductive kickback without damage. This enables direct high-side sensing in 48V and 60V automotive battery systems without external level-shifting circuitry.
How does the enhanced PWM rejection feature of the INA241A5QDRQ1 improve system reliability in motor control applications?
The INA241A5QDRQ1's enhanced PWM rejection holds its output for 1µs during large common-mode ΔV/Δt transients - such as those from IGBT gate drivers - then attenuates residual noise using 104dB AC CMRR at 100kHz and 1.1MHz bandwidth. This prevents false overcurrent trips in eTurbo and EPS inverters, directly improving functional safety compliance and reducing field failure rates.
Can the INA241A5QDRQ1 be used for bidirectional current sensing in regenerative braking systems?
Yes, the INA241A5QDRQ1 is explicitly designed for bidirectional operation across its full −5V to 110V common-mode range. In regenerative braking, it accurately measures both motoring (positive) and generating (negative) currents through the same shunt resistor, eliminating the need for separate unidirectional amplifiers or H-bridge reconfiguration.
What package options are available for the INA241A5QDRQ1, and which is recommended for high-density automotive PCB layouts?
The INA241A5QDRQ1 is offered in SOT23-8, VSSOP-8, SOIC-8, and VSSOP-10 packages. For high-density automotive layouts, the SOT23-8 (2.9mm × 2.8mm) is recommended due to its smallest footprint and validated thermal performance (RθJA = 129.7°C/W), enabling placement near power MOSFETs without compromising measurement accuracy.
Does the INA241A5QDRQ1 require external components for stable operation in noisy automotive environments?
Yes - a 1µF ceramic decoupling capacitor must be placed within 1cm of the VS pin, and the NC pin (Pin 4) must be connected to GND per TI SBOSA31D. These requirements ensure integrity of the enhanced PWM rejection circuitry and maintain 166dB DC CMRR; omission risks increased output ripple and false fault triggering in EPS or brake ECU designs.
INA241A5QDRQ1 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:
- 2 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
INA241A5QDRQ1 FAQ
1.How can I place an order for INA241A5QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A5QDRQ1 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 INA241A5QDRQ1 reliable?
The price and inventory of INA241A5QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A5QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A5QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A5QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A5QDRQ1?
INA241A5QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A5QDRQ1 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 INA241A5QDRQ1?
For technical support, including INA241A5QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A5QDRQ1 requirements.
6.How does Aetrix verify that INA241A5QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A5QDRQ1 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 INA241A5QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A5QDRQ1?
All INA241A5QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A5QDRQ1, 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 INA241A5QDRQ1 part is unused and in its original packaging.
Return procedure for INA241A5QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A5QDRQ1 Tags
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LM358DT
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Microchip Technology
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Texas Instruments
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