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Texas Instruments INA241A2QDGKRQ1
- Part No.:
- INA241A2QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241A2QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,341
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Product details
Overview
INA241A2QDGKRQ1 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 common-mode input range, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-precision motor phase current monitoring in electric power steering systems.
For engineers reviewing the INA241A2QDGKRQ1 datasheet, INA241A2QDGKRQ1 pinout, INA241A2QDGKRQ1 application, or INA241A2QDGKRQ1 equivalent, this page delivers verified specifications, automotive-grade thermal and PWM rejection performance, package-specific pin functions, and real-world implementation context for high-side/low-side sensing in switching powertrain circuits.
Technical Context
The INA241A2QDGKRQ1 employs a zero-drift, high-CMRR topology with enhanced PWM rejection circuitry that suppresses output disturbance during fast common-mode transients up to 125kHz. Its input stage operates independently of supply voltage, enabling measurement across −5V to 110V while powered from 2.7V–20V.
It features dual reference inputs (REF1/REF2) for flexible output level shifting, supports bidirectional current flow, and maintains 1.1MHz small-signal bandwidth and 8V/µs slew rate across all gains-critical for accurate overcurrent detection in fast-switching inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - scales shunt voltage to full-scale output at 2× the input differential, optimizing dynamic range for mid-range current sensing. |
| 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 - ensures ≤0.5mV error at 100mΩ shunt, critical for <1% current accuracy in EPS torque control loops. |
| DC CMRR | 166dB - rejects battery rail noise and ground bounce in automotive chassis-grounded systems. |
| Small-signal BW | 1.1MHz - captures transient overcurrent events within <1µs settling time (1%), supporting ISO 26262 ASIL-B fault response. |
| Supply range | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V vehicle power without external regulators. |
| Quiescent current | 2.5mA - enables low-power operation in always-on vehicle modules without thermal derating. |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 4.9mm body, exposed thermal pad, 0.65mm pitch, RoHS-compliant, qualified per AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Negative current-sense input | Connects to load side (low-side) or shunt ground node (high-side); handles −5V to 110V common-mode. |
| GND | Analog ground reference | System ground return for internal biasing; must be low-impedance path to minimize offset drift. |
| REF2 | Reference voltage input | Adjusts output baseline; tied to VS/2 for bidirectional zero-center output or GND for unidirectional mode. |
| NC | No-connect terminal | Reserved pin; must be connected to GND per datasheet to ensure stability and EMI immunity. |
| OUT | Amplified output | Delivers 20×(IN+−IN−)+VREF, rail-to-rail swing (VS−0.2V to 20mV above GND) into 10kΩ load. |
| VS | Power supply input | Accepts 2.7V–20V; decoupling capacitor required at pin for PWM rejection integrity. |
| REF1 | Reference voltage input | Paired with REF2 to set output common-mode; differential reference configuration enables precise offset nulling. |
| IN+ | Positive current-sense input | Connects to bus-voltage side (high-side) or load side (low-side); matched with IN− for CMRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | Suppresses output disturbance during >100V/µs common-mode edges up to 125kHz switching frequency-enables clean current sampling in ePS inverter gate-drive zones. |
| Bidirectional operation | Supports regenerative braking and motoring current flow with single device; eliminates need for dual amplifiers or H-bridge sensing complexity. |
| Ultra-low offset drift | ±0.1µV/°C - maintains <±2µV total drift over −40°C to 125°C, ensuring stable torque feedback across full automotive temperature range. |
| High AC CMRR | 104dB at 100kHz - attenuates high-frequency noise from DC-DC converters and motor commutation spikes before signal conditioning. |
| Survival voltage rating | −20V to 120V - withstands load-dump transients and jump-start conditions without latch-up or parametric shift. |
Applications
| eTurbo/Charger Control | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo inverter for boost pressure regulation and overcurrent shutdown. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth capturing IGBT switching transients. Use Value: Enables <1µs overcurrent response time and ±0.5% current accuracy under 125kHz PWM, meeting ASIL-C functional safety timing requirements. | Use Scenario: Motor phase current feedback in column-assist EPS for torque vectoring and assist-level modulation. IC Role / Device Role / Timing Role: Low-drift, bidirectional amplifier placed inline with motor winding for closed-loop current control. Use Value: ±10µV offset and 166dB DC CMRR eliminate ground-loop errors in chassis-referenced 12V systems, improving steering feel linearity. |
| Starter/Generator | Regenerative Braking |
Use Scenario: Bidirectional current sensing in 48V P0/P1 starter-generator for cranking assist and generator mode efficiency optimization. IC Role / Device Role / Timing Role: Common-mode-tolerant amplifier measuring both charge and discharge currents across shared shunt resistor. Use Value: −5V to 110V input range supports reverse-polarity protection and battery voltage reversal during cold-cranking, eliminating external protection diodes. | Use Scenario: Inverter-phase current measurement during energy recovery in hybrid electric vehicle brake-by-wire systems. IC Role / Device Role / Timing Role: Fast-settling (1µs to 1%) current amplifier synchronizing with IGBT gate signals to capture regeneration peaks. Use Value: 8V/µs slew rate and 1.1MHz bandwidth preserve waveform fidelity of high-di/dt regen pulses, enabling precise SOC estimation. |
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 | Lower precision: ±20µV max offset, ±0.1% gain error, no enhanced PWM rejection circuitry. | Limited to <50kHz switching; unsuitable for eTurbo or high-bandwidth EPS where 125kHz PWM rejection is required. | Select when cost sensitivity outweighs need for ultra-low drift and fast transient immunity in non-safety-critical 12V systems. |
| MAX40056ATA+T | Wider supply (2.7V–60V), but lower CMRR (130dB typ), no AEC-Q100 Grade 1 qualification, and 0.5MHz bandwidth. | Not qualified for automotive under-hood use; lacks survival voltage margin and thermal spec compliance for EPS or starter/generator. | Consider only for industrial motor drives outside automotive temperature or reliability requirements. |
Compared with INA240A2QDGKRQ1 and MAX40056ATA+T, the INA241A2QDGKRQ1 delivers superior offset stability, certified automotive robustness, and purpose-built PWM rejection-making it the only choice for ASIL-B compliant high-bandwidth current sensing in next-generation electrified powertrains.
Availability
INA241A2QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo control, starter/generator systems, and regenerative braking applications requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 traceability.
Supply support for INA241A2QDGKRQ1 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-accuracy, high-CMRR current sensing in automotive electrification systems-including EPS, eAxles, and 48V mild-hybrid architectures-where PWM noise immunity and thermal stability are non-negotiable.
FAQ
What is the maximum common-mode voltage the INA241A2QDGKRQ1 can withstand during normal operation?
The INA241A2QDGKRQ1 supports a continuous operational common-mode input range of −5V to 110V. This allows direct high-side sensing on 48V and 60V automotive buses without external level-shifting. Its survival rating extends to −20V to 120V, covering load-dump and jump-start transients. The device maintains specified performance across its full operating temperature range of −40°C to 125°C.
Does the INA241A2QDGKRQ1 require external components for stable operation in high-PWM-noise environments?
Yes-the INA241A2QDGKRQ1 requires a 1µF ceramic decoupling capacitor placed as close as possible to the VS pin, and proper grounding of the NC pin to GND, to ensure full PWM rejection performance up to 125kHz. Layout guidelines also specify short, matched IN+/IN− traces and separation from noisy power planes. These practices are validated in TI's SBOSA31D datasheet and are essential to achieve the specified 104dB AC CMRR at 100kHz.
How does the dual-reference architecture (REF1 and REF2) of the INA241A2QDGKRQ1 improve system design flexibility?
The REF1 and REF2 pins enable programmable output common-mode voltage-allowing the INA241A2QDGKRQ1 to interface directly with 1.8V, 3.3V, or 5V ADCs without external level-shifting. When tied to VS/2, they produce a zero-centered bidirectional output; when REF1 = VS and REF2 = GND, they generate a unidirectional output referenced to mid-supply. This eliminates external op-amp circuitry and reduces BOM count in space-constrained EPS modules.
Is the INA241A2QDGKRQ1 pin-compatible with other members of the INA241x-Q1 family?
Yes-the INA241A2QDGKRQ1 in VSSOP-8 (DGK) package shares identical pinout and footprint with all other INA241x-Q1 variants (A1/A3/A4/A5 and B-series) in DGK, DDF, and D packages. This enables gain-scaling flexibility (e.g., swapping A2 for A3 for higher sensitivity) without PCB redesign, provided layout adheres to TI's recommended thermal pad and decoupling guidelines.
What automotive safety standards does the INA241A2QDGKRQ1 support for functional safety development?
The INA241A2QDGKRQ1 is functional safety-capable with documentation available to aid ISO 26262 ASIL-B system design, including FIT rate data, failure mode analysis, and diagnostic coverage guidance. It meets AEC-Q100 Grade 1 qualification (−40°C to 125°C), supports safe failure fraction targets via built-in self-test readiness, and provides predictable parametric behavior under fault conditions-enabling its use in torque-control loops of electric power steering and brake-by-wire subsystems.
INA241A2QDGKRQ1 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
INA241A2QDGKRQ1 FAQ
1.How can I place an order for INA241A2QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A2QDGKRQ1 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 INA241A2QDGKRQ1 reliable?
The price and inventory of INA241A2QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A2QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A2QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A2QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A2QDGKRQ1?
INA241A2QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A2QDGKRQ1 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 INA241A2QDGKRQ1?
For technical support, including INA241A2QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A2QDGKRQ1 requirements.
6.How does Aetrix verify that INA241A2QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A2QDGKRQ1 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 INA241A2QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A2QDGKRQ1?
All INA241A2QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A2QDGKRQ1, 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 INA241A2QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241A2QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A2QDGKRQ1 Tags
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Microchip Technology
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