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Texas Instruments INA241A4QDGKRQ1
- Part No.:
- INA241A4QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241A4QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,214
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Product details
Overview
INA241A4QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 100V/V gain, −5V to 110V common-mode input range, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-side motor current monitoring in electric power steering systems.
For engineers reviewing the INA241A4QDGKRQ1 datasheet, INA241A4QDGKRQ1 pinout, INA241A4QDGKRQ1 application, or INA241A4QDGKRQ1 equivalent, this page delivers verified specifications, automotive-grade thermal and PWM rejection performance, package-specific pin functions, and real-world implementation context for eTurbo, EPS, starter/generator, and regenerative braking subsystems.
Technical Context
The INA241A4QDGKRQ1 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 switching frequency. Its input stage operates independently of supply voltage, enabling valid operation with VCM = −5V to 110V while powered from only 2.7V to 20V.
It delivers bidirectional sensing capability via differential inputs (IN+, IN−), dual reference inputs (REF1, REF2) for output level shifting, and rail-to-rail compatible output swing (VS − 0.2V min, 20mV above GND). The device achieves 166dB DC-CMRR and maintains 89dB AC-CMRR at 1MHz-critical for noise immunity in high-dV/dt motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 100× shunt voltage drop; enables use of low-value, low-power shunts (e.g., 0.5mΩ) for 50A full-scale with 5V output. |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/60V bus systems without level-shifting; survives −20V to 120V fault conditions. |
| Offset voltage (max) | ±10µV - contributes ≤0.002% error at 500mV sense voltage; critical for accurate bidirectional zero-current detection in EPS torque control. |
| Bandwidth | 1.1MHz - ensures sub-microsecond response to overcurrent events; supports fast closed-loop motor current regulation at >100kHz PWM rates. |
| CMRR (DC) | 166dB - rejects >20 million:1 common-mode interference; eliminates measurement corruption from bus ripple or gate-drive coupling. |
| Supply current | 2.5mA - enables integration into power-constrained automotive ECUs without significant thermal load or battery drain. |
| Slew rate | 8V/µs - prevents output saturation during rapid current transients; maintains fidelity of step responses with <1µs settling to 1%. |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: IN− | Current-sense amplifier negative input | Connect to load side (high-side) or ground side (low-side); defines polarity of bidirectional output swing relative to REF pins. |
| 2: GND | Ground reference | Analog ground return for internal circuitry; must be tied to low-impedance system ground near shunt resistor. |
| 3: REF2 | Reference voltage input 2 | Adjusts output baseline; when paired with REF1, enables bipolar output (e.g., 0–5V for −25A to +25A range). |
| 4: NC | No-connect terminal | Reserved pin; must be connected to GND per datasheet to ensure stability and EMI performance. |
| 5: OUT | Amplified current-sense output | High-impedance voltage output; drives ADC input directly; supports 1nF capacitive load without oscillation. |
| 6: VS | Positive power supply | 2.7V–20V operation; independent of common-mode voltage; decoupling capacitor required within 1cm of pin. |
| 7: REF1 | Reference voltage input 1 | Paired with REF2 to set output mid-point; both pins accept 0V to VS; precision ratio matching enables <0.01% reference divider error. |
| 8: IN+ | Current-sense amplifier positive input | Connect to bus-voltage side (high-side) or load side (low-side); differential pair with IN− defines sensed current direction and magnitude. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation-meets automotive ECU thermal requirements without derating. |
| Enhanced PWM rejection | Suppresses output disturbance during 125kHz common-mode transients; holds output stable for 1µs after edge, then attenuates residual with 89dB CMRR at 1MHz. |
| Bidirectional sensing architecture | Dual reference inputs (REF1/REF2) enable true zero-centered output for regenerative braking and motoring modes in inverter applications. |
| Ultra-low offset drift | ±0.1µV/°C max - limits temperature-induced gain error to <0.0125% over full automotive range, eliminating need for periodic calibration. |
| Survival voltage rating | −20V to 120V - withstands load-dump and jump-start transients in 12V/48V architectures without external protection. |
Applications
| eTurbo/Charger Control | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo inverter during boost and regeneration cycles. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 100V/V gain and 1.1MHz bandwidth, placed inline with motor phases. Use Value: Enables precise torque vectoring and overcurrent shutdown within 1µs, preventing IGBT failure during transient load spikes. |
Use Scenario: Motor current feedback in column-assist EPS for torque assist accuracy and fail-safe current limiting. IC Role / Device Role / Timing Role: Low-drift bidirectional amplifier measuring shunt voltage across H-bridge outputs with ±10µV offset. Use Value: Delivers <0.1% current measurement error across −40°C to 125°C, ensuring consistent assist feel and ASIL-B compliance. |
| Starter/Generator System | Regenerative Braking |
Use Scenario: Bidirectional current sensing in 48V P0/P1 mild-hybrid starter-generator for cranking and energy recovery. IC Role / Device Role / Timing Role: High-common-mode (−5V to 110V) amplifier interfacing with low-value shunt on battery rail. Use Value: Survives 120V load-dump transients and measures ±500A with 100V/V gain, enabling accurate state-of-charge estimation. |
Use Scenario: Inverter-phase current feedback during regen mode in EV traction inverters using SiC MOSFETs. IC Role / Device Role / Timing Role: PWM-rejection-optimized amplifier rejecting dV/dt noise from 100kHz+ SiC switching edges. Use Value: Maintains 89dB AC-CMRR at 1MHz, eliminating false overcurrent trips and enabling >95% brake energy recovery efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDGKRQ1 | Lower precision: ±150µV max offset, ±0.1% gain error, no enhanced PWM rejection circuitry. | Targeted at cost-sensitive non-safety-critical applications; not qualified for ASIL-B systems requiring <1µs fault response. | Select when PWM rejection and sub-10µV offset are not required; offers lower unit cost but requires external filtering in noisy inverters. |
| MAX40056ATA+T | Wider supply range (2.7V–60V), higher bandwidth (2.5MHz), but narrower common-mode (−0.2V to 65V) and no AEC-Q100 Grade 1 rating. | Designed for industrial servo drives; lacks automotive qualification and survival voltage margin for 48V load-dump events. | Choose for high-speed industrial motion control where 110V common-mode and automotive qualification are unnecessary. |
Compared with INA240A4QDGKRQ1 and MAX40056ATA+T, the INA241A4QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 110V common-mode operation, 100V/V precision gain, and hardware-enhanced PWM rejection-making it the only option qualified for ASIL-B EPS and eTurbo control loops demanding <1µs overcurrent response under 125kHz switching noise.
Availability
INA241A4QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering, eTurbo control, and regenerative braking systems requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing from authorized channels.
Supply support for INA241A4QDGKRQ1 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 signal conditioning and power management ICs.
The INA241x-Q1 product line was designed specifically for high-accuracy, high-noise-immunity current sensing in automotive electrification systems-including EPS, eTurbo, 48V mild hybrids, and traction inverters-where AEC-Q100 qualification and PWM rejection are mandatory.
FAQ
What is the maximum common-mode voltage the INA241A4QDGKRQ1 can measure?
The INA241A4QDGKRQ1 supports an operational common-mode input range of −5V to 110V, with survival capability up to −20V to 120V. This allows direct high-side sensing on 48V and 60V automotive buses without external level-shifting circuitry, and ensures robustness against load-dump transients in 12V/48V architectures. The device remains functional even when VCM exceeds its 2.7V–20V supply voltage.
Does the INA241A4QDGKRQ1 require external components for basic operation?
The INA241A4QDGKRQ1 requires only two external components for standard operation: a 0.1µF ceramic decoupling capacitor between VS and GND placed within 1cm of the pins, and a grounded connection on the NC (pin 4) terminal. No external gain-setting resistors or compensation networks are needed-the 100V/V gain is internally fixed. Reference pins (REF1/REF2) may be tied to defined voltages or left floating depending on unipolar/bipolar output requirements.
How does the enhanced PWM rejection feature work in the INA241A4QDGKRQ1?
The INA241A4QDGKRQ1 implements hardware-based enhanced PWM rejection that detects fast common-mode ΔV/Δt transients and holds the output stable for 1µs, preventing propagation of switching noise. For subsequent transients spaced ≥3µs apart, it relies on high AC-CMRR (89dB at 1MHz) and 1.1MHz bandwidth to attenuate residual disturbance. This dual-stage approach enables reliable operation up to 125kHz PWM frequencies in motor drives and inverters.
Is the INA241A4QDGKRQ1 pin-compatible with other devices in the INA241x-Q1 family?
Yes-the INA241A4QDGKRQ1 shares identical pinout and package dimensions with all VSSOP-8 variants in the INA241x-Q1 family (e.g., INA241A1QDGKRQ1, INA241A5QDGKRQ1). Gain is determined solely by internal trimming; no PCB layout changes are required when upgrading or downgrading gain versions within the same package type (DGK, DDF, or D).
What is the typical quiescent current consumption of the INA241A4QDGKRQ1?
The INA241A4QDGKRQ1 draws 2.5mA of quiescent current at 25°C with VSENSE = 0mV, rising to a maximum of 3.2mA across the full −40°C to 125°C operating range. This low power draw enables integration into always-on automotive domains without excessive thermal loading or battery drain, supporting ISO 26262-compliant power budgeting for ASIL-B systems.
INA241A4QDGKRQ1 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:
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA241A4QDGKRQ1 FAQ
1.How can I place an order for INA241A4QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A4QDGKRQ1 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 INA241A4QDGKRQ1 reliable?
The price and inventory of INA241A4QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A4QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A4QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A4QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A4QDGKRQ1?
INA241A4QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A4QDGKRQ1 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 INA241A4QDGKRQ1?
For technical support, including INA241A4QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A4QDGKRQ1 requirements.
6.How does Aetrix verify that INA241A4QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A4QDGKRQ1 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 INA241A4QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A4QDGKRQ1?
All INA241A4QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A4QDGKRQ1, 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 INA241A4QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241A4QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A4QDGKRQ1 Tags
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