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Texas Instruments INA241B5QDRQ1
- Part No.:
- INA241B5QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241B5QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:3,169
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Product details
Overview
INA241B5QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) 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 and regenerative braking systems.
For engineers reviewing the INA241B5QDRQ1 datasheet, INA241B5QDRQ1 pinout, INA241B5QDRQ1 application, or INA241B5QDRQ1 equivalent, key selection criteria include PWM rejection up to 125kHz, 8V/µs slew rate, 1µs 1% settling time, ±0.1% gain error, and SOT23-8 package compatibility with high-density automotive PCB layouts.
Technical Context
The INA241B5QDRQ1 employs 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 in fast-switching 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) for flexible output level shifting across 0V to VS, supports bidirectional sensing via differential input polarity reversal, and maintains 104dB AC-CMRR at 100kHz - critical for rejecting noise in high-dV/dt automotive inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - enables ±2.5mV full-scale shunt voltage to produce 0.5V–4.5V output swing for 12-bit ADC interfacing |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/800V battery rails without level-shifting circuitry |
| Input offset voltage | ±150µV max - ensures ≤0.075% error at 2A through 1mΩ shunt at room temperature |
| Bandwidth | 1.1MHz - captures >500kHz current harmonics in eTurbo inverter switching waveforms |
| Slew rate | 8V/µs - prevents distortion during 10A/µs transient load steps in starter/generator control loops |
| Supply voltage | 2.7V to 20V - compatible with 3.3V/5V/12V automotive domain controllers and isolated supplies |
| Quiescent current | 2.5mA - enables low-power always-on monitoring in ASIL-B safety-critical subsystems |
Pinout & Package
SOT23-8 package (2.9mm × 2.8mm), thermally enhanced for automotive under-hood operation; pin-compatible with industry-standard current sense amplifiers in same footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connect to load side in high-side sensing or ground side in low-side sensing; handles −5V to 110V CM voltage |
| GND (Pin 2) | Analog ground reference | System ground return for internal bias network; must be star-connected to minimize ground bounce in PWM systems |
| REF2 (Pin 3) | Reference voltage input 2 | Adjusts output common-mode level; tied to 0V for unipolar output or VS/2 for bipolar operation |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be connected to GND per TI layout guidelines to suppress EMI coupling |
| OUT (Pin 5) | Amplified output | Rail-to-rail capable (VS − 0.2V min); drives 10kΩ loads directly into SAR ADC inputs |
| VS (Pin 6) | Power supply input | Accepts 2.7V–20V; requires local 100nF + 10µF decoupling adjacent to pin for PWM rejection integrity |
| REF1 (Pin 7) | Reference voltage input 1 | Paired with REF2 to set output offset; differential REF1–REF2 defines output zero-current baseline |
| IN+ (Pin 8) | Positive current-sense input | Connect to bus-voltage side in high-side sensing or load side in low-side sensing; matched to IN− for CMRR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation - meets thermal requirements for EPS module placement near steering column |
| Enhanced PWM rejection | Holds output stable for 1µs during >100V/µs common-mode edges - eliminates false overcurrent trips in 125kHz motor gate drive |
| 166dB DC-CMRR | Rejects battery rail ripple and DC-link noise in 48V mild-hybrid systems without external filtering |
| Bidirectional sensing capability | Supports regenerative braking current flow direction detection using single shunt resistor - reduces BOM cost vs dual-amplifier solutions |
| 2.5mA quiescent current | Enables continuous current monitoring during vehicle sleep mode without violating ISO 16750-2 quiescent current limits |
Applications
| Electric Power Steering (EPS) | eTurbo / Electric Turbocharger |
|---|---|
|
Use Scenario: Real-time phase current measurement in 3-phase EPS motor inverter during assist and return torque control. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1µs settling time, synchronizing with 20kHz PWM carrier for FOC algorithms. Use Value: Enables <1% torque ripple control by resolving 50mA shunt voltage steps across 0.5mΩ resistor at 110V bus. |
Use Scenario: Motor winding current monitoring in 48V eTurbo actuator during rapid boost pressure ramp-up. IC Role / Device Role / Timing Role: Fast-settling current sensor interfaced to C2000™ MCU ADC with 1.1MHz bandwidth matching inverter switching harmonics. Use Value: Supports 100A peak current detection with ±150µV offset error - eliminating need for dynamic offset calibration in closed-loop boost control. |
| Starter/Generator (Belt-Driven or P0/P1) | Regenerative Braking System |
|
Use Scenario: Bidirectional current sensing across shared shunt in 48V starter-generator during cranking (motor mode) and energy recovery (generator mode). IC Role / Device Role / Timing Role: Dual-reference-input amplifier configured for bipolar output (±2.5V) to distinguish charge/discharge direction without polarity switching. Use Value: Eliminates external op-amp level-shifting circuitry - reducing solution size by 35% and improving thermal stability in engine bay mounting. |
Use Scenario: Inverter phase current feedback in 800V regenerative braking system during coast-down deceleration events. IC Role / Device Role / Timing Role: High-CMRR current amplifier rejecting 100V/ns common-mode transients from SiC MOSFET switching in traction inverter half-bridges. Use Value: Maintains <0.1% measurement accuracy despite 110V common-mode swings - enabling precise brake-by-wire torque blending with hydraulic backup. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDRQ1 | Lower precision: ±500µV offset, ±0.3% gain error, no enhanced PWM rejection | Targeted at cost-sensitive 12V EPS modules where 125kHz PWM rejection is not required | Select when budget constraints outweigh need for 1µs transient immunity and <0.1% gain accuracy |
| MAX40056ATA+T | Wider supply range (2.7V–60V), but only 700kHz BW and no AEC-Q100 Grade 1 rating | Suitable for industrial servo drives, not qualified for automotive under-hood deployment | Choose for non-automotive 48V systems requiring higher supply headroom but lower bandwidth tolerance |
Compared with INA241B5QDRQ1, INA240A5QDRQ1 trades PWM rejection and offset performance for lower cost, while MAX40056ATA+T offers extended supply range at the expense of automotive qualification and bandwidth - making INA241B5QDRQ1 the only option meeting AEC-Q100 Grade 1, 1.1MHz BW, and 125kHz PWM rejection simultaneously.
Availability
INA241B5QDRQ1 is available at Aetrix Electronics and suitable for electric power steering, eTurbo actuation, and regenerative braking systems requiring stable component supply across multi-year automotive production cycles.
Supply support for INA241B5QDRQ1 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 ICs.
The INA241x-Q1 product line was engineered specifically for high-reliability current sensing in AEC-Q100-compliant automotive electrification systems - emphasizing PWM transient immunity, wide common-mode operation, and zero-drift precision under thermal stress.
FAQ
What is the maximum common-mode voltage the INA241B5QDRQ1 can withstand during operation?
The INA241B5QDRQ1 has an operational common-mode input range of −5V to 110V, meaning it functions correctly with input voltages in that span regardless of supply voltage. Its survival rating extends to −20V to 120V, allowing brief exposure to transients beyond operational limits without damage. This enables direct high-side sensing on 48V and 800V EV battery rails when used with appropriate external protection.
Does the INA241B5QDRQ1 support bidirectional current measurement?
Yes, the INA241B5QDRQ1 supports true bidirectional current sensing using a single shunt resistor. Its input architecture allows polarity reversal of the differential sense voltage (VIN+ − VIN−) to represent current flow direction. When paired with REF1/REF2 pins biased at mid-supply, it delivers a bipolar output (e.g., 0.5V to 4.5V centered at 2.5V) - enabling detection of both motoring and regenerative current in starter/generator and brake systems.
How does the enhanced PWM rejection feature work in the INA241B5QDRQ1?
The INA241B5QDRQ1 implements proprietary circuitry that detects large common-mode dV/dt transients (>100V/µs) and holds its output stable for 1µs, preventing propagation of switching noise to downstream ADCs. For subsequent transients spaced ≥3µs apart, its 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth provide additional attenuation. This dual-stage rejection enables reliable operation up to 125kHz PWM frequencies in EPS and eTurbo inverters.
What package type is used for the INA241B5QDRQ1, and why is it suitable for automotive applications?
The INA241B5QDRQ1 uses the DDF (SOT23-8) package - a 2.9mm × 2.8mm thermally enhanced surface-mount outline with exposed pad for improved heat dissipation. Its small footprint supports high-density PCB layouts in space-constrained automotive ECUs, while its qualified construction meets AEC-Q100 mechanical stress and thermal cycling requirements for under-hood deployment up to 125°C ambient.
Can the INA241B5QDRQ1 be used with a 3.3V microcontroller ADC?
Yes, the INA241B5QDRQ1 is fully compatible with 3.3V microcontrollers. With its 2.7V to 20V supply range and rail-to-rail output (minimum swing to VS − 0.2V), it delivers a clean 0.5V–3.1V output signal when powered from 3.3V - matching the full input range of typical 12-bit SAR ADCs. Its 2.5mA quiescent current also aligns with low-power MCU domain requirements.
INA241B5QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SOIC
INA241B5QDRQ1 FAQ
1.How can I place an order for INA241B5QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B5QDRQ1 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 INA241B5QDRQ1 reliable?
The price and inventory of INA241B5QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B5QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B5QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B5QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B5QDRQ1?
INA241B5QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B5QDRQ1 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 INA241B5QDRQ1?
For technical support, including INA241B5QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B5QDRQ1 requirements.
6.How does Aetrix verify that INA241B5QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B5QDRQ1 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 INA241B5QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B5QDRQ1?
All INA241B5QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B5QDRQ1, 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 INA241B5QDRQ1 part is unused and in its original packaging.
Return procedure for INA241B5QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B5QDRQ1 Tags
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LM358DT
STMicroelectronics
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Texas Instruments
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Microchip Technology
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