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Texas Instruments INA241B4QDDFRQ1
- Part No.:
- INA241B4QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA241B4QDDFRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
INA241B4QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 100V/V gain, −5V to 110V common-mode input range, ±150µV max offset voltage, and enhanced PWM rejection up to 125kHz - deployed in electric power steering and regenerative braking systems for accurate high-side/low-side motor current monitoring.
For engineers reviewing the INA241B4QDDFRQ1 datasheet, INA241B4QDDFRQ1 pinout, INA241B4QDDFRQ1 application, or INA241B4QDDFRQ1 equivalent, this page delivers verified specifications, automotive-grade thermal and ESD performance, SOT-23-8 package details, functional safety documentation support, and real-world implementation context for high-voltage switching systems.
Technical Context
The INA241B4QDDFRQ1 employs a zero-drift, high-common-mode topology with integrated PWM rejection circuitry that holds output for 1µs during fast ΔV/Δt transients and attenuates residual disturbances via 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth. It operates from 2.7V–20V supply and supports bidirectional sensing across shunt resistors in high-side, low-side, or inline configurations.
Its dual reference inputs (REF1/REF2) enable programmable output offset from 0V to VS, while its 8V/µs slew rate and 1µs 1% settling time ensure fidelity in fast-switching motor control loops. Input bias current remains stable at ≤35µA even at 110V common-mode voltage, minimizing measurement error in precision shunt-based designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - scales 10mV shunt drop to full-scale 1V output, enabling high-resolution ADC interfacing with minimal gain error (±0.1% max). |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/60V bus systems without level-shifting, surviving −20V to 120V transients. |
| Offset voltage | ±150µV max - introduces ≤1.5mV error at 100V/V gain for 10mΩ shunt at 100A, critical for bidirectional torque control accuracy. |
| Small-signal bandwidth | 1.1MHz - captures overcurrent events within microseconds, essential for IGBT/MOSFET short-circuit protection timing. |
| PWM rejection | Up to 125kHz - suppresses switching noise from eTurbo inverters and EPS H-bridges, reducing output ripple without external filtering. |
| Supply current | 2.5mA typical - enables low-power operation in always-on vehicle subsystems without thermal derating in SOT-23-8 package. |
| CMRR | 130dB DC / 104dB @100kHz - rejects battery ripple and ground bounce in noisy automotive environments, preserving signal integrity. |
Pinout & Package
INA241B4QDDFRQ1 is packaged in an 8-pin SOT-23 (DDF) measuring 2.9mm × 2.8mm, optimized for space-constrained automotive PCBs with thermal resistance RθJA = 129.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Negative current-sense input | Connects to load or ground side of shunt; handles −5V to 110V common-mode with ≤35µA bias current. |
| GND (Pin 2) | Analog ground reference | System ground return for internal circuitry; must be low-impedance to maintain CMRR and offset stability. |
| REF2 (Pin 3) | Reference voltage input | Adjusts output offset; connect to 0V–VS to set bidirectional zero-current output between GND and VS. |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be tied to GND per datasheet to ensure proper internal node biasing. |
| OUT (Pin 5) | Amplified output | Delivers rail-to-rail swing (GND+8mV to VS−0.2V); drives 10kΩ loads directly into ADC or comparator inputs. |
| VS (Pin 6) | Power supply | Accepts 2.7V–20V; supplies internal amplifiers and reference circuitry; bypass with 1µF ceramic near pin. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output center point; differential REF1–REF2 sets output offset voltage. |
| IN+ (Pin 8) | Positive current-sense input | Connects to bus or load side of shunt; matches IN− in voltage rating and bias behavior for symmetric CMR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with lifetime reliability testing per automotive stress standards. |
| Enhanced PWM rejection | 1µs output hold + high AC-CMRR ensures clean output during 125kHz gate-drive transients in EPS and starter/generator inverters. |
| Bidirectional sensing | Zero-referenced output via REF1/REF2 enables accurate forward/reverse current detection in regenerative braking and eTurbo control. |
| Ultra-low drift | ±0.5µV/°C offset drift and ±5ppm/°C gain drift maintain calibration stability across engine bay temperature swings. |
| High-speed response | 1µs 1% settling time and 8V/µs slew rate support real-time overcurrent detection for IGBT short-circuit protection. |
Applications
| eTurbo/Charger Control | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Monitoring bidirectional current in 48V eTurbo inverter during boost and regeneration phases. IC Role / Device Role / Timing Role: High-side current sense amplifier with 100V/V gain and 125kHz PWM rejection, placed inline with motor phase legs. Use Value: Enables precise torque estimation and fault detection within 1µs, preventing inverter shoot-through during rapid direction reversal. |
Use Scenario: Measuring assist motor current in column-assist EPS systems under varying road-load conditions. IC Role / Device Role / Timing Role: Low-side shunt amplifier with REF1/REF2 offset tuning for zero-current baseline alignment across temperature. Use Value: Delivers ±150µV offset accuracy to resolve <1A assist current changes, improving driver feedback linearity and energy efficiency. |
| Starter/Generator System | Regenerative Braking |
Use Scenario: Sensing cranking current (up to 300A) and generator output in integrated starter-generator (ISG) units. IC Role / Device Role / Timing Role: High-common-mode (110V) bidirectional amplifier operating from 12V auxiliary supply in harsh start-stop cycles. Use Value: Survives −20V cold-crank transients and maintains ±0.1% gain accuracy across 125°C under-hood temperatures. |
Use Scenario: Capturing rapid current reversals during brake-by-wire actuation in 400V EV platforms. IC Role / Device Role / Timing Role: Inline shunt monitor with 1.1MHz bandwidth and 104dB AC-CMRR to reject inverter switching noise at 10kHz–20kHz. Use Value: Enables sub-millisecond energy recovery control with <1% measurement error, increasing brake energy capture by >3% per stop cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDDFRQ1 | Same 100V/V gain and SOT-23-8 package, but ±120µV max offset and no enhanced PWM rejection circuitry. | Lacks 125kHz PWM suppression; requires external RC filtering in high-dV/dt EPS or eTurbo designs. | Select when cost sensitivity outweighs need for integrated transient immunity and system-level noise margin is sufficient. |
| MAX40056ATA+T | 100V/V gain, −5V to 65V common-mode, ±100µV offset, but only 500kHz bandwidth and no AEC-Q100 Grade 1 rating. | Not qualified for under-hood use above 105°C; limited to cabin or low-temp zone applications. | Choose only for non-automotive industrial motor drives where ambient temperature stays below 105°C. |
Compared with INA241B4QDDFRQ1, INA240A4QDDFRQ1 trades PWM immunity for lower offset, while MAX40056ATA+T sacrifices automotive qualification and bandwidth for higher DC precision - making INA241B4QDDFRQ1 the sole option meeting full AEC-Q100 Grade 1, 125kHz PWM rejection, and 110V common-mode in SOT-23-8.
Availability
INA241B4QDDFRQ1 is available at Aetrix Electronics and suitable for electric power steering, regenerative braking, and eTurbo/charger control requiring stable component supply across automotive production lifecycles.
Supply support for INA241B4QDDFRQ1 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 delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
INA241B4QDDFRQ1 belongs to TI's AEC-Q100-qualified current sense amplifier family, engineered specifically for high-accuracy, high-CMRR, and high-PWM-rejection performance in next-generation electric vehicle powertrain control systems.
FAQ
What is the maximum common-mode voltage the INA241B4QDDFRQ1 can withstand during operation?
The INA241B4QDDFRQ1 has an operational common-mode input range of −5V to 110V and a survival rating of −20V to 120V. This allows it to safely interface with 48V and 60V automotive buses during load-dump or cold-crank transients while maintaining accurate bidirectional current measurement within its specified operating range.
Does the INA241B4QDDFRQ1 support bidirectional current sensing, and how is zero-current output configured?
Yes, the INA241B4QDDFRQ1 supports true bidirectional sensing. Zero-current output is configured using the REF1 and REF2 pins: connecting REF1 to VS and REF2 to GND sets the output midpoint at VS/2, enabling symmetrical positive/negative current representation relative to that reference.
What is the purpose of the NC pin (Pin 4) on the INA241B4QDDFRQ1 in SOT-23-8 package?
Pin 4 is designated NC (No Connect) but must be externally tied to GND per the datasheet. This connection stabilizes internal bias nodes and ensures optimal CMRR and offset performance - leaving it floating degrades common-mode rejection and increases output drift.
How does the enhanced PWM rejection feature of the INA241B4QDDFRQ1 improve system reliability in motor control?
The INA241B4QDDFRQ1's enhanced PWM rejection holds its output for 1µs during fast common-mode transients and attenuates residual noise via high AC-CMRR, eliminating false overcurrent triggers in EPS and eTurbo inverters. This prevents unnecessary shutdowns and enables robust closed-loop torque control under 125kHz switching conditions.
Is the INA241B4QDDFRQ1 compatible with standard 0805 or 1206 shunt resistors in automotive PCB layouts?
Yes, the INA241B4QDDFRQ1's 100V/V gain and ±150µV offset allow use with common 0.5mΩ to 5mΩ shunts (e.g., Vishay WSLP series). Its SOT-23-8 footprint supports compact placement adjacent to shunts, and its 2.5mA supply current minimizes self-heating effects on nearby precision resistors.
INA241B4QDDFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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:
- TSOT-23-8
INA241B4QDDFRQ1 FAQ
1.How can I place an order for INA241B4QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B4QDDFRQ1 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 INA241B4QDDFRQ1 reliable?
The price and inventory of INA241B4QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B4QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B4QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B4QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B4QDDFRQ1?
INA241B4QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B4QDDFRQ1 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 INA241B4QDDFRQ1?
For technical support, including INA241B4QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B4QDDFRQ1 requirements.
6.How does Aetrix verify that INA241B4QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B4QDDFRQ1 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 INA241B4QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B4QDDFRQ1?
All INA241B4QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B4QDDFRQ1, 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 INA241B4QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA241B4QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B4QDDFRQ1 Tags
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