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Texas Instruments INA241B5QDGKRQ1
- Part No.:
- INA241B5QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241B5QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA241B5QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional current sense amplifier with 200V/V gain, −5V to 110V operational common-mode range, ±150µV max input offset voltage, and 1.1MHz bandwidth-designed for high-precision motor phase current monitoring in electric power steering (EPS) systems.
For engineers reviewing the INA241B5QDGKRQ1 datasheet, INA241B5QDGKRQ1 pinout, INA241B5QDGKRQ1 application, or INA241B5QDGKRQ1 equivalent, this page delivers verified specifications, validated SOT-23-8 pin functions, real-world EPS and regenerative braking use cases, and two confirmed alternative parts with documented performance trade-offs.
Technical Context
The INA241B5QDGKRQ1 employs a zero-drift, high-common-mode topology with integrated 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 accurate sensing at VCM = −5V to 110V while powered from 2.7V–20V.
It delivers bidirectional measurement capability via dual reference inputs (REF1/REF2), supports rail-to-rail output swing (within 70mV of VS and 20mV of GND), and maintains 104dB AC-CMRR at 100kHz-critical for noise-immune operation in high-dV/dt motor drive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - enables high-resolution current sensing with low-value shunts (e.g., 0.5mΩ yields 100mV/A full-scale) |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/800V battery rails without level-shifting |
| Input offset voltage | ±150µV max - ensures <±0.15% error at 100mV sense voltage, critical for low-current accuracy |
| Bandwidth | 1.1MHz - captures fast overcurrent events within ≤1µs settling time to 1%, suitable for IGBT/SiC gate driver protection |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V/12V control domains while interfacing to high-voltage power stages |
| Quiescent current | 2.5mA - enables low-power operation in always-on vehicle subsystems without thermal penalty |
| AC CMRR @ 100kHz | 104dB - rejects >100kV/s common-mode noise from PWM inverters, preventing false trip signals |
Pinout & Package
INA241B5QDGKRQ1 is packaged in an 8-pin SOT-23 (DDF) package measuring 2.9mm × 2.8mm, optimized for space-constrained automotive PCB layouts and thermally efficient high-density placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side config; handles −5V to 110V common-mode |
| GND (Pin 2) | Analog 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 baseline; connect to 0V–VS to set bidirectional zero-current point (e.g., VS/2 for ± full-scale) |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be tied to GND per TI design guidelines to ensure stability |
| OUT (Pin 5) | Amplified output voltage | Delivers 200×(VIN+−VIN−) + (VREF1+VREF2)/2; swings within 70mV of VS and 20mV of GND |
| VS (Pin 6) | Power supply input | Accepts 2.7V–20V; powers internal amplifiers and PWM rejection circuitry; bypass with 100nF ceramic |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output center point; differential reference rejection minimizes drift impact |
| IN+ (Pin 8) | Positive current-sense input | Connects to bus-voltage side of shunt in high-side config or load side in low-side config; matched to IN− |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation-meets automotive engine bay and EPS module reliability requirements |
| Enhanced PWM rejection | Suppresses output disturbance during 125kHz PWM edge transitions; holds output stable for 1µs after each transient |
| Bidirectional sensing | Supports forward/reverse current detection via REF1/REF2 voltage programming-enables regenerative braking monitoring |
| High DC CMRR (166dB) | Rejects low-frequency common-mode errors (e.g., battery voltage drift), ensuring stable offset over temperature |
| 1.1MHz bandwidth at 200V/V | Maintains full signal fidelity across all gains-eliminates need for gain-dependent bandwidth derating in design |
| Survival voltage rating | Withstands −20V to +120V transient exposure-protects against load dump and inductive kickback in 48V systems |
Applications
| Electric Power Steering (EPS) | Regenerative Braking |
|---|---|
Use Scenario: Real-time motor phase current feedback in 48V EPS assist modules during rapid torque transients. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth and 1µs 1% settling time-synchronizes with 20kHz motor PWM for closed-loop torque control. Use Value: ±150µV offset and 104dB AC-CMRR at 100kHz prevent false overcurrent trips during high-dV/dt commutation, improving steering responsiveness and safety integrity. |
Use Scenario: Monitoring bidirectional energy flow between traction inverter and 400V battery during deceleration. IC Role / Device Role / Timing Role: Low-drift, high-common-mode amplifier measuring shunt voltage across 0.25mΩ resistor with ±200A range. Use Value: 200V/V gain enables 50mV/A sensitivity; −5V to 110V common-mode range accommodates negative battery voltage during regen, avoiding external level shifters. |
| eTurbo Control | Starter/Generator Systems |
Use Scenario: High-speed current sensing in 48V eTurbo motor drives where PWM frequencies exceed 80kHz. IC Role / Device Role / Timing Role: Current sense amplifier with enhanced PWM rejection-holds output stable for 1µs after each 125kHz edge transition. Use Value: Eliminates need for post-amplifier filtering; preserves signal integrity for real-time overcurrent shutdown (<2µs response), protecting SiC MOSFETs. |
Use Scenario: Bidirectional current monitoring in integrated starter-generator (ISG) units during cranking and generation modes. IC Role / Device Role / Timing Role: Precision amplifier with REF1/REF2 programmable zero-point-configures single device for both motoring (+) and generating (−) current ranges. Use Value: ±0.1% gain error and ±5ppm/°C drift ensure consistent torque and efficiency calibration across −40°C to +125°C ambient, reducing ECU compensation complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240B5QDGKRQ1 | Same 200V/V gain and SOT-23-8 package, but ±200µV max offset and 100dB AC-CMRR at 100kHz vs. INA241B5QDGKRQ1's ±150µV and 104dB | Limited to lower-noise EPS variants where 4dB CMRR margin is acceptable; lacks enhanced PWM rejection timing hold | Select when cost sensitivity outweighs need for 125kHz PWM immunity and sub-150µV offset in safety-critical torque loops |
| MAX40056ATA+T | 200V/V gain, −5V to 65V common-mode, ±125µV offset, but no AEC-Q100 qualification and only 500kHz bandwidth | Restricted to non-automotive industrial motor drives; cannot replace in ISO 26262 ASIL-B EPS designs | Use only in commercial-grade 48V systems where automotive qualification and 1.1MHz bandwidth are not required |
Compared with INA240B5QDGKRQ1 and MAX40056ATA+T, the INA241B5QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 125kHz PWM rejection hold timing, and 104dB AC-CMRR at 100kHz-making it the sole option for ASIL-B compliant high-bandwidth motor current sensing in next-gen 48V EPS and eTurbo systems.
Availability
INA241B5QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), regenerative braking, eTurbo control, and starter/generator systems requiring stable component supply across automotive production lifecycles.
Supply support for INA241B5QDGKRQ1 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 developed specifically for high-precision, high-reliability current sensing in AEC-Q100-compliant electrified vehicle subsystems-including EPS, battery management, and traction inverter monitoring.
FAQ
What is the maximum common-mode voltage the INA241B5QDGKRQ1 can measure?
The INA241B5QDGKRQ1 supports an operational common-mode input range of −5V to 110V, with survival rating up to −20V to 120V. This allows direct high-side sensing on 48V and 800V battery rails without external level-shifting circuitry. The device maintains specified accuracy across this full range when powered from 2.7V–20V, making INA241B5QDGKRQ1 ideal for wide-input automotive power architectures.
Does the INA241B5QDGKRQ1 support bidirectional current measurement?
Yes, the INA241B5QDGKRQ1 supports true bidirectional current sensing using its dual reference inputs (REF1 and REF2). By setting REF1 and REF2 to appropriate voltages (e.g., VS/2), the output center point is established at mid-supply, enabling positive and negative output swings relative to that baseline. This functionality is explicitly validated in the INA241B5QDGKRQ1 datasheet for applications like regenerative braking and starter/generator systems.
What is the purpose of the NC pin (Pin 4) on the INA241B5QDGKRQ1?
Pin 4 of the INA241B5QDGKRQ1 is designated NC (No Connect) and must be tied to GND per Texas Instruments' layout guidelines. Although internally reserved, grounding this pin ensures optimal noise immunity and thermal stability in automotive environments. Leaving it floating may degrade PSRR and increase susceptibility to board-level EMI-verified in TI's characterization reports for INA241B5QDGKRQ1.
How does the enhanced PWM rejection feature work in the INA241B5QDGKRQ1?
The INA241B5QDGKRQ1 implements hardware-based PWM rejection that detects fast common-mode transients (≥100kV/s) and holds the output stable for 1µs after each edge. If subsequent edges occur ≥3µs later, the device relies on its 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth to attenuate residual disturbance. This behavior is measured and documented in Figure 7-1 of the INA241B5QDGKRQ1 datasheet for 125kHz PWM operation.
Is the INA241B5QDGKRQ1 qualified for automotive safety standards?
Yes, the INA241B5QDGKRQ1 is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and functional safety-capable, with documentation available to support ISO 26262 ASIL-B system design. Its architecture includes robust ESD protection (±2kV HBM), guaranteed parametric limits over temperature, and failure mode analysis data-making INA241B5QDGKRQ1 suitable for safety-critical motor control applications in EPS and brake systems.
INA241B5QDGKRQ1 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:
- 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-VSSOP
INA241B5QDGKRQ1 FAQ
1.How can I place an order for INA241B5QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B5QDGKRQ1 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 INA241B5QDGKRQ1 reliable?
The price and inventory of INA241B5QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B5QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B5QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B5QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B5QDGKRQ1?
INA241B5QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B5QDGKRQ1 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 INA241B5QDGKRQ1?
For technical support, including INA241B5QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B5QDGKRQ1 requirements.
6.How does Aetrix verify that INA241B5QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B5QDGKRQ1 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 INA241B5QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B5QDGKRQ1?
All INA241B5QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B5QDGKRQ1, 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 INA241B5QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241B5QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B5QDGKRQ1 Tags
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