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Texas Instruments INA241B3QDGKRQ1
- Part No.:
- INA241B3QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241B3QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
INA241B3QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 0 (−40°C to +150°C) bidirectional current sense amplifier with 50V/V gain, −5V to 110V common-mode input range, ±150µV max input offset voltage, and 1.1MHz bandwidth-designed for high-precision motor current monitoring in electric power steering and regenerative braking systems.
For engineers reviewing the INA241B3QDGKRQ1 datasheet, INA241B3QDGKRQ1 pinout, INA241B3QDGKRQ1 application, or INA241B3QDGKRQ1 equivalent, this page delivers verified specifications, automotive-grade thermal performance, PWM transient rejection up to 125kHz, and real-world implementation guidance for high-side/low-side shunt sensing in 48V and 800V EV subsystems.
Technical Context
The INA241B3QDGKRQ1 implements a zero-drift, multistage amplifier architecture with integrated enhanced PWM rejection circuitry that holds output for 1µs during large ΔV/Δt common-mode transients-enabling accurate current measurement even under fast-switching conditions in motor drives. Its input stage operates independently of supply voltage, supporting common-mode voltages beyond VS (up to 110V).
It features dual reference inputs (REF1/REF2) enabling programmable output offset from 0V to VS, and supports bidirectional sensing via differential input configuration (IN+, IN−). The device draws only 2.5mA quiescent current and maintains 120dB AC-CMRR at 100kHz across its full operating temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output to 2.5V for 50mV shunt drop; optimizes dynamic range for mid-current EV applications. |
| Common-mode range | −5V to 110V - enables direct high-side sensing on 48V bus or 800V traction inverter DC-link without level-shifting. |
| Input offset voltage | ±150µV max - ensures ≤0.3% error at 50mV sense voltage; drift ±0.5µV/°C limits thermal-induced drift in under-hood environments. |
| Bandwidth | 1.1MHz - captures overcurrent events within 1µs settling time to 1%, critical for IGBT/SiC gate driver protection loops. |
| PWM rejection | Up to 125kHz - suppresses switching noise from eTurbo inverters and EPS H-bridges without external filtering. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V/12V control rails; survives load-dump transients up to 22V absolute max. |
| Quiescent current | 2.5mA - enables always-on current monitoring in battery management without excessive standby drain. |
Pinout & Package
VSSOP-8 package (DGK): 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad for improved heat dissipation in automotive under-hood mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Negative current-sense input | Connect to low-side of shunt (low-side sensing) or load side (high-side sensing); handles −5V to 110V common-mode. |
| GND | Analog ground reference | System ground return for internal bias network; must be low-impedance path to minimize measurement error. |
| REF2 | Reference voltage input 2 | Adjusts output offset; connect to GND for unidirectional mode or to Vs/2 for true bidirectional centered output. |
| NC | No-connect terminal | Internally reserved; must be tied to GND per TI layout guidelines to ensure EMI immunity and stability. |
| OUT | Amplified current-sense output | Rail-to-rail capable (Vs − 0.2V min swing); drives ADC inputs directly or feeds analog comparator for overcurrent detection. |
| VS | Positive supply rail | Accepts 2.7V–20V; decoupling capacitor required within 1cm of pin to maintain 1.1MHz stability under PWM noise. |
| REF1 | Reference voltage input 1 | Paired with REF2 to set output common-mode; enables precision offset trimming without affecting gain accuracy. |
| IN+ | Positive current-sense input | Connect to bus-voltage side of shunt (high-side) or load side (low-side); matched to IN− for CMRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40°C to +150°C ambient operation-meets under-hood thermal requirements for EPS and eTurbo controllers. |
| Enhanced PWM rejection | 1µs output hold + high AC-CMRR (104dB @ 100kHz) eliminates need for external RC filters in 125kHz switching systems. |
| Bidirectional sensing capability | Dual reference inputs (REF1/REF2) enable true zero-centered output for regenerative braking current direction detection. |
| Survival voltage rating | −20V to +120V - withstands load dump, jump-start, and reverse-battery conditions without latch-up or damage. |
| High DC-CMRR | 120dB minimum - rejects low-frequency common-mode errors from chassis ground shifts in 48V/800V hybrid architectures. |
Applications
| Electric Power Steering (EPS) | eTurbo / 48V Belt-Driven Starter Generator |
|---|---|
|
Use Scenario: Real-time phase current monitoring in 3-phase EPS motor inverter during assist and return modes. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier sampling at ≥100kHz to feed torque-control loop and fault detection logic. Use Value: ±150µV offset enables <0.3% current error at 50mV shunt drop-critical for smooth assist feel and ISO 26262 ASIL-B functional safety compliance. |
Use Scenario: Monitoring boost converter input/output currents in 48V eTurbo system with 100kHz SiC switching. IC Role / Device Role / Timing Role: Low-latency current feedback element rejecting PWM-edge transients to prevent false overcurrent trips. Use Value: 1.1MHz bandwidth and 1µs settling time allow accurate current capture within single PWM cycle-enabling adaptive current limiting. |
| Starter/Generator Integrated Unit | Regenerative Braking Control |
|
Use Scenario: Bidirectional current sensing on starter/generator DC-link during cranking (high surge) and generation (regen) phases. IC Role / Device Role / Timing Role: Precision shunt amplifier with REF1/REF2 configured for ±2.5V output swing-supporting ADC input range of MCU. Use Value: 50V/V gain and −5V to 110V common-mode range enable direct sensing on 48V bus without isolation or level shifters. |
Use Scenario: Measuring motor current polarity and magnitude during brake-by-wire actuation and energy recovery. IC Role / Device Role / Timing Role: Bidirectional current monitor feeding vehicle dynamics controller to coordinate friction/regen braking torque distribution. Use Value: ±0.1% gain error and ±0.5µV/°C drift ensure consistent current reporting across −40°C to +150°C ambient-essential for brake blending algorithms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDGKRQ1 | Same VSSOP-8 package and 50V/V gain, but Grade 1 (−40°C to +125°C) and ±10µV max offset (higher precision, lower temp range). | Preferred for cabin-mounted modules where ambient stays below 125°C and ultra-low offset is required. | Select when tighter offset spec (±10µV vs ±150µV) outweighs extended temperature capability. |
| MAX40056ATA+T | 50V/V gain, −5V to 65V common-mode, 1.5MHz BW, but no AEC-Q100 qualification and only Grade 3 (−40°C to +85°C). | Suitable for non-automotive industrial motor drives; lacks automotive reliability validation and high-temp operation. | Consider only for cost-sensitive non-automotive designs where 150°C operation and AEC-Q100 are not required. |
Compared with INA240A3QDGKRQ1 and MAX40056ATA+T, the INA241B3QDGKRQ1 uniquely combines AEC-Q100 Grade 0 qualification, 110V common-mode range, and integrated PWM rejection-making it the only option qualified for under-hood 48V/800V traction applications requiring both high temperature resilience and switching noise immunity.
Availability
INA241B3QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering, eTurbo control, and regenerative braking systems requiring stable component supply across automotive production lifecycles.
Supply support for INA241B3QDGKRQ1 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 ISO/TS 16949-certified manufacturing.
The INA241x-Q1 product line was engineered specifically for AEC-Q100-compliant current sensing in high-voltage, high-noise automotive subsystems-including EPS, eTurbo, and 48V/800V electrification architectures.
FAQ
What is the maximum common-mode voltage the INA241B3QDGKRQ1 can handle during normal operation?
The INA241B3QDGKRQ1 supports a continuous common-mode input range of −5V to 110V across its full operating temperature range (−40°C to +150°C). This allows direct high-side sensing on 48V buses and compatibility with 800V traction inverter DC-links when used with appropriate external protection. Its survival rating extends to −20V to +120V for transient conditions such as load dump.
Does the INA241B3QDGKRQ1 require external filtering to reject PWM noise?
No-the INA241B3QDGKRQ1 integrates enhanced PWM rejection circuitry that holds its output for 1µs during large ΔV/Δt common-mode transients and maintains 104dB AC-CMRR at 100kHz. This eliminates the need for external RC filters in systems switching up to 125kHz, simplifying PCB layout and improving measurement fidelity in EPS and eTurbo inverters.
How does the INA241B3QDGKRQ1 support bidirectional current sensing?
The INA241B3QDGKRQ1 supports true bidirectional sensing via its dual reference inputs (REF1 and REF2). By setting REF1 = Vs and REF2 = GND (or vice versa), the output center point shifts to Vs/2, enabling symmetric ±2.5V output swing for 50mV shunt drops-ideal for regenerative braking and motor reversal detection in starter/generator units.
What is the thermal performance of the INA241B3QDGKRQ1 in VSSOP-8 package?
In the DGK (VSSOP-8) package, the INA241B3QDGKRQ1 has a junction-to-ambient thermal resistance (RθJA) of 167.2°C/W and junction-to-board (RθJB) of 88.9°C/W. With proper PCB copper pour and thermal vias under the exposed pad, it sustains continuous operation at +150°C ambient-validated per AEC-Q100 Grade 0 requirements for under-hood automotive placement.
Can the INA241B3QDGKRQ1 be used in low-side current sensing configurations?
Yes-the INA241B3QDGKRQ1 supports low-side, high-side, and in-line shunt configurations. For low-side sensing, connect IN+ to the load side of the shunt and IN− to system ground. Its −5V to 110V common-mode range accommodates ground-referenced measurements while maintaining high CMRR and immunity to ground bounce in noisy 48V systems.
INA241B3QDGKRQ1 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
INA241B3QDGKRQ1 FAQ
1.How can I place an order for INA241B3QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B3QDGKRQ1 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 INA241B3QDGKRQ1 reliable?
The price and inventory of INA241B3QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B3QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B3QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B3QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B3QDGKRQ1?
INA241B3QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B3QDGKRQ1 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 INA241B3QDGKRQ1?
For technical support, including INA241B3QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B3QDGKRQ1 requirements.
6.How does Aetrix verify that INA241B3QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B3QDGKRQ1 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 INA241B3QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B3QDGKRQ1?
All INA241B3QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B3QDGKRQ1, 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 INA241B3QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241B3QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B3QDGKRQ1 Tags
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