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Texas Instruments INA241B4QDGKRQ1
- Part No.:
- INA241B4QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241B4QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,428
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Product details
Overview
INA241B4QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) bidirectional current sense amplifier with 100V/V gain, −5V to 110V common-mode input range, ±150µV max input offset voltage, and 1.1MHz bandwidth-designed for high-accuracy motor phase current monitoring in electric power steering (EPS) systems.
For engineers reviewing the INA241B4QDGKRQ1 datasheet, INA241B4QDGKRQ1 pinout, INA241B4QDGKRQ1 application, or INA241B4QDGKRQ1 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 shunt sensing in switching powertrain subsystems.
Technical Context
The INA241B4QDGKRQ1 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-critical for EPS and regenerative braking where gate drivers induce large common-mode edges. Its 1.1MHz small-signal bandwidth and 1µs 1% settling time enable accurate overcurrent detection within motor control loop timing constraints.
It operates from 2.7V–20V supply, draws 2.5mA quiescent current, and supports bidirectional sensing via dual reference inputs (REF1/REF2) to set output baseline-enabling precise current polarity resolution across shunt resistors in both charging and discharging phases of starter/generator systems.
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., 1mΩ) while maintaining robust signal-to-noise ratio at 5V supply. |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/60V bus rails without level-shifting; survives −20V to 120V fault conditions. |
| Input offset voltage | ±150µV max - limits current measurement error to ≤150µA when using 1mΩ shunt; drift ≤±0.5µV/°C ensures stability across automotive temperature range. |
| Bandwidth & settling | 1.1MHz (−3dB), 1µs to 1% - captures rapid current transients in PWM-driven motors; meets ISO 26262 ASIL-B timing requirements for fault detection. |
| CMRR | 130dB DC, 104dB @100kHz - rejects noise from adjacent high-dv/dt power switches; maintains accuracy during simultaneous gate drive and current sampling. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/24V vehicle battery rails; no external LDO required. |
| Quiescent current | 2.5mA - enables always-on current monitoring in safety-critical EPS modules without excessive thermal load or battery drain. |
Pinout & Package
DGK package: 8-pin VSSOP (3mm × 4.9mm), RoHS-compliant, moisture-sensitive level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connect to ground side of shunt in low-side config; to load side in high-side config-defines current direction polarity. |
| GND (Pin 2) | Analog ground reference | Must be star-connected to shunt ground plane; separates analog return from digital/power grounds to preserve CMRR. |
| REF2 (Pin 3) | Reference input 2 | Paired with REF1 to set output midpoint; connecting REF1=VS and REF2=GND yields bipolar output centered at VS/2. |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be tied to GND per TI design guidelines to ensure ESD robustness and noise immunity. |
| OUT (Pin 5) | Amplified output | Drives ADC input directly; rail-to-rail swing (to GND +20mV / to VS −200mV) maximizes dynamic range for 12-bit+ converters. |
| VS (Pin 6) | Positive supply | Accepts 2.7V–20V; decoupling capacitor (≥1µF ceramic) required within 5mm to minimize supply-induced errors. |
| REF1 (Pin 7) | Reference input 1 | Configures output offset: e.g., REF1=REF2=VS/2 yields unipolar 0–VS output for single-supply ADC interfacing. |
| IN+ (Pin 8) | Positive current-sense input | Connect to bus-voltage side of shunt in high-side config; to load side in low-side config-completes differential sense path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation-meets automotive powertrain reliability requirements without derating. |
| Enhanced PWM rejection | Suppresses output disturbance during 125kHz PWM edges via internal transient hold-off and high AC-CMRR-eliminates need for external RC filtering. |
| Bidirectional sensing capability | Dual reference inputs (REF1/REF2) enable programmable output centering-supports regenerative braking current reversal without hardware change. |
| High DC CMRR (130dB) | Maintains <±0.005% gain error under 48V common-mode shift-critical for precision torque estimation in EPS motor control loops. |
| Low input bias current (35µA typ) | Minimizes voltage error across high-value shunts (>10mΩ); enables accurate low-current standby monitoring in starter/generator sleep modes. |
Applications
| Electric Power Steering (EPS) | Starter/Generator Systems |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V brushless DC motor for assist torque calculation and fault protection. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1µs settling time-synchronized to PWM carrier for cycle-by-cycle overcurrent detection. Use Value: Enables ASIL-B compliant torque verification and short-circuit shutdown within 2µs, preventing MOSFET destruction during lock-rotor events. |
Use Scenario: Bidirectional current measurement during engine start (high surge) and regenerative braking (reverse energy flow). IC Role / Device Role / Timing Role: Precision shunt amplifier with REF1/REF2-configurable output baseline-tracks current polarity reversal without signal inversion circuitry. Use Value: Reduces BOM count by eliminating separate high-side/low-side sensors; supports seamless transition between motoring and generating modes. |
| eTurbo Control | Brake-by-Wire Actuators |
Use Scenario: Monitoring high-frequency current ripple in 48V eTurbo motor driven by SiC inverters operating >80kHz. IC Role / Device Role / Timing Role: Ultra-high CMRR (104dB @100kHz) current sense amplifier-rejects common-mode noise from fast-switching SiC gates. Use Value: Delivers clean current waveform for field-oriented control (FOC), improving turbo response time and reducing audible switching noise. |
Use Scenario: Safety-critical brake caliper motor current sensing in redundant actuation systems requiring dual independent measurements. IC Role / Device Role / Timing Role: AEC-Q100 qualified amplifier with functional safety documentation support-used in ASIL-D decomposition architecture with diagnostic coverage. Use Value: Provides traceable, calibrated current data for ISO 26262 FMEDA analysis; enables safe torque limitation and fail-safe position hold. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDGKRQ1 | Same 100V/V gain and DGK package, but ±120µV max offset (Grade A), 0.1% max gain error vs. INA241B4QDGKRQ1's ±0.1%. | Higher precision for torque-critical EPS variants; not rated for 150°C Grade 0 operation like INA241B variants. | Select INA240A4QDGKRQ1 when tighter offset and gain specs are required for calibration-sensitive applications; verify thermal margin for under-hood placement. |
| MAX40056ATA+T | 100V/V gain, −5V to 65V common-mode range, 2.5MHz bandwidth-but only 85dB AC-CMRR @100kHz and no AEC-Q100 qualification. | Limited to non-safety-critical industrial motor drives; lacks automotive qualification and enhanced PWM rejection. | Consider MAX40056ATA+T for cost-sensitive 24V industrial BLDC controllers where 125kHz PWM rejection and ASIL compliance are not required. |
Compared with INA240A4QDGKRQ1 and MAX40056ATA+T, the INA241B4QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 104dB AC-CMRR at 100kHz, and integrated 125kHz PWM rejection-making it the only option qualified for production EPS and brake-by-wire systems requiring functional safety evidence.
Availability
INA241B4QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), starter/generator, eTurbo, and brake-by-wire applications requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing.
Supply support for INA241B4QDGKRQ1 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 design expertise and rigorous AEC-Q100 validation infrastructure.
The INA241x-Q1 product line was engineered specifically for high-reliability, high-precision current sensing in electrified vehicle powertrains-including EPS, 48V mild hybrids, and brake-by-wire actuators-where PWM noise immunity and wide common-mode range are non-negotiable.
FAQ
What is the maximum common-mode voltage the INA241B4QDGKRQ1 can withstand during fault conditions?
The INA241B4QDGKRQ1 has a survival common-mode voltage rating of −20V to +120V, meaning it remains undamaged under sustained overvoltage or reverse-battery conditions beyond its operational −5V to +110V range. This protects against load-dump transients and jump-start scenarios in 48V automotive systems without external clamping diodes.
How does the enhanced PWM rejection in the INA241B4QDGKRQ1 improve motor control accuracy?
The INA241B4QDGKRQ1 holds its output stable for 1µs during large common-mode ΔV/Δt edges-preventing false overcurrent triggers-and leverages 104dB AC-CMRR at 100kHz to attenuate residual noise. This eliminates post-processing filtering delays, enabling true cycle-by-cycle current sampling synchronized to SiC/MOSFET gate drive signals in EPS inverters.
Can the INA241B4QDGKRQ1 be used for low-side current sensing in a 48V battery system?
Yes-the INA241B4QDGKRQ1 supports low-side sensing by connecting IN+ to the load side and IN− to system ground. Its −5V to +110V common-mode range fully covers 48V battery voltage plus transients, and its 100V/V gain provides 5V full-scale output for ±50mV shunt drops-ideal for 1mΩ shunts in high-current starter/generator paths.
What is the purpose of the REF1 and REF2 pins on the INA241B4QDGKRQ1?
REF1 and REF2 set the output voltage baseline: connecting REF1=VS and REF2=GND yields a bipolar output centered at VS/2, enabling bidirectional current representation (positive = motoring, negative = regeneration). This eliminates external op-amps for level-shifting and simplifies ADC interface in regenerative braking systems.
Is the INA241B4QDGKRQ1 pin-compatible with other devices in the INA241x-Q1 family?
Yes-INA241B4QDGKRQ1 shares identical pinout and footprint with all DGK-package variants (e.g., INA241B1QDGKRQ1, INA241A4QDGKRQ1). Gain and grade differences are internal; PCB layout is fully reusable across the 10V/V–200V/V family, enabling scalable design reuse for different current ranges.
INA241B4QDGKRQ1 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
INA241B4QDGKRQ1 FAQ
1.How can I place an order for INA241B4QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B4QDGKRQ1 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 INA241B4QDGKRQ1 reliable?
The price and inventory of INA241B4QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B4QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B4QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B4QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B4QDGKRQ1?
INA241B4QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B4QDGKRQ1 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 INA241B4QDGKRQ1?
For technical support, including INA241B4QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B4QDGKRQ1 requirements.
6.How does Aetrix verify that INA241B4QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B4QDGKRQ1 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 INA241B4QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B4QDGKRQ1?
All INA241B4QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B4QDGKRQ1, 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 INA241B4QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241B4QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B4QDGKRQ1 Tags
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Texas Instruments
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MCP6006T-E/OT
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