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Texas Instruments INA241A3QDRQ1
- Part No.:
- INA241A3QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241A3QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:1,758
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Product details
Overview
INA241A3QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 50V/V gain, −5V to 110V common-mode input range, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-side motor phase current monitoring in electric power steering systems.
For engineers reviewing the INA241A3QDRQ1 datasheet, INA241A3QDRQ1 pinout, INA241A3QDRQ1 application, or INA241A3QDRQ1 equivalent, key selection criteria include PWM rejection up to 125kHz, 166dB DC-CMRR, bidirectional sensing capability, and automotive-grade thermal robustness across SOIC-8, VSSOP-8, and SOT23-8 packages.
Technical Context
The INA241A3QDRQ1 employs a zero-drift, high-common-mode topology with integrated enhanced PWM rejection circuitry that holds output for 1µs during fast ΔV/Δt transients and attenuates residual disturbances via 104dB AC-CMRR at 100kHz. Its multistage architecture maintains 1.1MHz bandwidth across all gains while supporting operation beyond supply rails (e.g., 110V VCM with 5V VS).
It features dual reference inputs (REF1/REF2) enabling flexible output level shifting from GND to VS, and delivers 8V/µs slew rate with 1µs settling to 1%-critical for accurate overcurrent detection in switching motor drives where common-mode edges exceed 100V/µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output to 2.5V for 50mV shunt drop, optimizing ADC dynamic range in 12-bit systems. |
| Common-mode range | −5V to 110V - enables direct high-side sensing on 48V/60V bus systems without level-shifting or isolation. |
| Offset voltage (max) | ±10µV - contributes ≤0.02% error at 50mV sense voltage, critical for <1% total current measurement accuracy. |
| DC CMRR | 166dB - rejects >200k:1 common-mode interference, essential for stable readings amid battery rail noise. |
| Small-signal bandwidth | 1.1MHz - supports accurate capture of fast current transients in 20kHz+ PWM motor control loops. |
| Slew rate | 8V/µs - ensures distortion-free reproduction of 100kHz square-wave current waveforms with <1% overshoot. |
| Supply range | 2.7V to 20V - allows direct use from 3.3V logic rails or 12V/15V system supplies without LDO overhead. |
Pinout & Package
INA241A3QDRQ1 is available in SOIC-8 (D), VSSOP-8 (DGK), and SOT23-8 (DDF) packages. All variants share identical 8-pin functional mapping per TI SBOSA31D Rev D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN– | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side; handles −5V to 110V common-mode. |
| GND | Analog ground reference | System ground return for internal biasing; must be low-impedance path to avoid CMRR degradation. |
| REF2 | Reference voltage input 2 | Adjusts output baseline; tied to GND for unidirectional mode or mid-supply for true bidirectional center-zero output. |
| NC | No-connect terminal | Internally reserved; must be connected to GND per datasheet to ensure stability and EMI performance. |
| OUT | Amplified current-sense output | Delivers 50×(IN+ − IN−) + (REF1 + REF2)/2; drives 10kΩ loads with <20mV swing to GND. |
| VS | Positive supply input | Accepts 2.7V–20V; powers internal amplifiers and reference circuitry; bypass with 1µF ceramic near pin. |
| REF1 | Reference voltage input 1 | Paired with REF2 to set output common-mode; differential reference rejection minimizes supply-induced errors. |
| IN+ | Positive current-sense input | Connects to bus-voltage side of shunt in high-side config; matched to IN– for optimal CMRR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation-meets automotive EPS and eTurbo thermal requirements without derating. |
| Enhanced PWM rejection | Suppresses output disturbance from 125kHz PWM edges via 1µs hold + high AC-CMRR, eliminating need for external RC filtering. |
| Bidirectional sensing | Supports forward/reverse current flow with single device by configuring REF1/REF2-reduces BOM count vs discrete solutions. |
| Survival voltage rating | Withstands −20V to 120V transient faults-enables robust design in 48V mild-hybrid systems with load-dump immunity. |
| Low temperature drift | ±0.1µV/°C offset drift and ±1ppm/°C gain drift maintain calibration stability over vehicle lifetime without periodic recalibration. |
Applications
| Electric Power Steering (EPS) | eTurbo / 48V Boost Converter |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase brushless motor drive during assist torque generation and regenerative braking. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier sampling at ≥20kHz to feed FOC algorithm with sub-1µs latency. Use Value: 1.1MHz bandwidth and 1µs 1% settling enable accurate overcurrent protection at 100A peak without false trips during PWM commutation. |
Use Scenario: Input/output current sensing in 48V–12V bi-directional DC/DC converter controlling turbocharger motor and battery regeneration. IC Role / Device Role / Timing Role: Bidirectional shunt monitor on primary and secondary sides, synchronized to 100kHz switching frequency. Use Value: 125kHz PWM rejection eliminates 500ns output glitches during gate-drive transitions, ensuring clean feedback for digital controller. |
| Starter/Generator (Belt-Driven) | Regenerative Braking Inverter |
|
Use Scenario: High-side current measurement on 48V starter-generator during cranking (high inrush) and generator mode (reverse current). IC Role / Device Role / Timing Role: Precision bidirectional amplifier interfacing to 16-bit SAR ADC with programmable REF1/REF2 for zero-centered output. Use Value: ±10µV offset and 166dB DC-CMRR reject battery ripple and alternator noise, enabling <0.5% current accuracy at 200A. |
Use Scenario: Motor phase current sensing in IGBT-based regenerative braking inverter for commercial EVs operating at 800V bus. IC Role / Device Role / Timing Role: Isolated current sense front-end with −5V to 110V common-mode range handling high dv/dt transients from IGBT switching. Use Value: 110V operational VCM and −20V to 120V survival rating tolerate 100V overshoot during IGBT turn-off without latch-up or damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDRQ1 | Lower precision: ±20µV max offset, ±0.1% gain error, no enhanced PWM rejection circuitry. | Limited to <50kHz PWM systems; requires external filtering for clean output in EPS motor drives. | Select when cost sensitivity outweighs need for 125kHz PWM immunity and sub-0.05% accuracy. |
| MAX40056ATA+T | Wider VCM (−5V to 110V same), but lower bandwidth (400kHz), higher offset (±100µV), no AEC-Q100 Grade 1 rating. | Not qualified for under-hood automotive use; suitable for industrial motor drives only. | Choose only for non-automotive 48V systems where AEC-Q100 compliance is not required. |
Compared with INA240A3QDRQ1 and MAX40056ATA+T, INA241A3QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 125kHz PWM rejection, and ±10µV offset in a single SOIC-8 package-enabling simplified, high-reliability current sensing in safety-critical automotive inverters without design compromises.
Availability
INA241A3QDRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo control, and 48V starter/generator systems requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for INA241A3QDRQ1 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 decades of automotive IC expertise and ISO/TS 16949-certified manufacturing.
The INA241x-Q1 product line was engineered specifically for high-accuracy, high-CMRR current sensing in AEC-Q100-compliant traction inverters, EPS modules, and 48V mild-hybrid systems-addressing demand for zero-drift performance under harsh PWM noise.
FAQ
What is the maximum common-mode voltage the INA241A3QDRQ1 can measure?
The INA241A3QDRQ1 supports an operational common-mode input range of −5V to 110V, meaning it can accurately sense current across shunts placed in circuits with bus voltages up to 110V-even when powered from a lower supply like 5V or 12V. Its survival rating extends to −20V to 120V, providing margin against transients. This capability is confirmed in Section 6.3 of the TI SBOSA31D datasheet and enables direct high-side sensing in 48V and 60V automotive systems without external level-shifting circuitry. The INA241A3QDRQ1 maintains full specifications across this range.
Does the INA241A3QDRQ1 support bidirectional current sensing?
Yes, the INA241A3QDRQ1 supports true bidirectional current sensing through its dual reference inputs (REF1 and REF2). By setting REF1 and REF2 to appropriate voltages-for example, REF1 = VS and REF2 = GND-the output centers at VS/2, allowing positive and negative differential inputs to produce outputs above and below that midpoint. This functionality is explicitly documented in Section 7.3.1 and Figure 8-2 of the SBOSA31D datasheet. The INA241A3QDRQ1's symmetric input structure and low offset drift ensure accuracy in both directions without calibration.
What packaging options are available for the INA241A3QDRQ1?
The INA241A3QDRQ1 is offered in three RoHS-compliant, automotive-qualified packages: SOIC-8 (D), VSSOP-8 (DGK), and SOT23-8 (DDF). All share identical pinout and electrical specifications per TI's package option addendum. The SOIC-8 provides highest power dissipation (RθJA = 122.9°C/W), VSSOP-8 offers space savings with moderate thermal performance (167.2°C/W), and SOT23-8 delivers minimal footprint for compact layouts. Each package is rated for −40°C to 125°C operation and carries AEC-Q100 Grade 1 qualification.
How does the enhanced PWM rejection feature work in the INA241A3QDRQ1?
The INA241A3QDRQ1's enhanced PWM rejection uses a proprietary circuit that detects fast common-mode transients (>100V/µs) and holds the output steady for 1µs, preventing propagation of the initial edge disturbance. Subsequent transients within 3µs rely on the device's high AC-CMRR (104dB at 100kHz) and 1.1MHz bandwidth for attenuation. This two-stage mechanism-validated in Figure 7-1 of SBOSA31D-enables clean output even at 125kHz PWM frequencies, eliminating need for external RC filters that degrade bandwidth and step response in motor control loops.
What is the typical quiescent current consumption of the INA241A3QDRQ1?
The INA241A3QDRQ1 draws 2.5mA typical quiescent current at 25°C and 5V supply, rising to 3.2mA maximum across the full −40°C to 125°C operating range. This value is specified in Section 6.5 of the SBOSA31D datasheet under "IQ Quiescent current" and remains stable across common-mode voltages from −5V to 110V and supply voltages from 2.7V to 20V. The low, predictable current draw simplifies power budgeting in always-on automotive subsystems such as EPS controllers and enables use with small LDOs or buck converters without thermal concerns.
INA241A3QDRQ1 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:
- 3 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
INA241A3QDRQ1 FAQ
1.How can I place an order for INA241A3QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A3QDRQ1 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 INA241A3QDRQ1 reliable?
The price and inventory of INA241A3QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A3QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A3QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A3QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A3QDRQ1?
INA241A3QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A3QDRQ1 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 INA241A3QDRQ1?
For technical support, including INA241A3QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A3QDRQ1 requirements.
6.How does Aetrix verify that INA241A3QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A3QDRQ1 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 INA241A3QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A3QDRQ1?
All INA241A3QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A3QDRQ1, 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 INA241A3QDRQ1 part is unused and in its original packaging.
Return procedure for INA241A3QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A3QDRQ1 Tags
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