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Texas Instruments INA241B3QDRQ1
- Part No.:
- INA241B3QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241B3QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:4,842
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Product details
Overview
INA241B3QDRQ1 from Texas Instruments is an AEC-Q100 Grade 0 (−40°C to +150°C) bidirectional current sense amplifier optimized for high-voltage motor control and regenerative braking in automotive systems. It delivers 50V/V fixed gain, −5V to 110V operational common-mode range, ±150µV max input offset voltage, and 1.1MHz bandwidth with 8V/µs slew rate - enabling precise inline current measurement in eTurbo, EPS, and starter/generator inverters.
For engineers reviewing the INA241B3QDRQ1 datasheet, INA241B3QDRQ1 pinout, INA241B3QDRQ1 application, or INA241B3QDRQ1 equivalent, this page provides verified package mapping (SOT23-8), confirmed PWM rejection up to 125kHz, exact Grade 0 thermal specs, real-world CMRR performance (120–130dB), and validated alternatives for high-side sensing in 48V–800V traction subsystems.
Technical Context
The INA241B3QDRQ1 employs a zero-drift, multistage amplifier architecture with integrated enhanced PWM rejection circuitry that holds output for 1µs during large ΔV/Δt transients and attenuates residual disturbances via 104dB AC-CMRR at 100kHz. Its input stage operates independently of supply voltage, supporting common-mode voltages beyond VS (e.g., 110V with 5V supply).
It features dual reference inputs (REF1/REF2) enabling programmable output offset from 0V to VS, supports bidirectional sensing via differential input polarity reversal, and maintains 1.1MHz bandwidth across all gains - critical for fast overcurrent detection in SiC/GaN-based motor drives.
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 vs. noise in 10–200A motor phase sensing. |
| Common-mode range | −5V to 110V - enables direct high-side sensing on 48V, 400V, and 800V battery rails without level-shifting. |
| Offset voltage (max) | ±150µV - contributes ≤0.3% error at 50mV sense voltage; stable over −40°C to +150°C (±0.5µV/°C drift). |
| Bandwidth | 1.1MHz - resolves sub-microsecond current transients; supports >500kHz PWM carrier edge detection. |
| Slew rate | 8V/µs - prevents output saturation during fast load steps; ensures <1µs settling to 1% for step inputs. |
| Supply range | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/15V bias rails in automotive ECUs. |
| Quiescent current | 2.5mA - enables low-power always-on monitoring in safety-critical subsystems without thermal penalty. |
Pinout & Package
INA241B3QDRQ1 is packaged in DDF (SOT-23-8), measuring 2.9mm × 2.8mm with 0.65mm pitch. The package supports reflow soldering per JEDEC J-STD-020 and is qualified for automotive under AEC-Q200.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Current-sense negative input | Connect to load side (high-side) or ground side (low-side); defines current direction polarity for bidirectional output. |
| GND | Ground reference | System ground return for internal bias network; must be low-impedance path to minimize offset error. |
| REF2 | Reference input 2 | Adjusts output common-mode level; tied to GND for unipolar output, or to Vs/2 for bipolar centered output. |
| NC | No-connect | Reserved pin; must be connected to GND per datasheet to ensure stability and EMI immunity. |
| OUT | Analog output | Single-ended voltage output = 50 × (IN+ − IN−) + (REF1 + REF2)/2; drives 10kΩ min load. |
| VS | Power supply | 2.7V–20V analog supply; decoupling capacitor (1µF ceramic) required within 1mm of pin. |
| REF1 | Reference input 1 | Paired with REF2 to set output offset; enables rail-to-rail output swing adjustment independent of sense signal. |
| IN+ | Current-sense positive input | Connect to bus-voltage side (high-side) or load side (low-side); forms differential pair with IN−. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Rated for −40°C to +150°C ambient operation - suitable for engine bay and inverter module placement without derating. |
| Enhanced PWM rejection | Suppresses output disturbance from 125kHz PWM edges via 1µs hold + high AC-CMRR - eliminates need for external RC filtering in motor gate-drive feedback loops. |
| Survival voltage rating | Withstands −20V to +120V common-mode transients - protects against load-dump and inductive kickback in 48V/800V systems. |
| Input-referred noise | 39nV/√Hz at 50V/V gain - enables resolution of <10mA current changes across 100µΩ shunts in EPS applications. |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration - includes FIT rate, failure modes, and diagnostic coverage guidance. |
Applications
| eTurbo / Electric Turbocharger | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo inverter to regulate boost pressure and prevent overspeed. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth capturing 20kHz motor commutation edges. Use Value: Enables closed-loop torque control with <1µs current loop latency; ±150µV offset ensures <0.5% error at 10A–150A operating range. | Use Scenario: Low-side current sensing in 12V/48V EPS motor driver to detect stall, overload, and assist torque demand. IC Role / Device Role / Timing Role: Bidirectional amplifier with −5V to 110V common-mode range, directly interfacing shunt on MOSFET source leg. Use Value: Eliminates need for isolated amplifiers or current transformers; 8V/µs slew rate prevents distortion during 100A peak assist pulses. |
| Starter/Generator (Belt-Driven or P0/P1) | Regenerative Braking System |
Use Scenario: Inline current measurement in 400V starter-generator inverter to manage charge/discharge power and thermal limits. IC Role / Device Role / Timing Role: High-precision bidirectional amplifier with 50V/V gain scaling 2mΩ shunt to 0–5V output for MCU ADC. Use Value: ±0.1% gain error and 120dB AC-CMRR suppress noise from adjacent IGBT switching, ensuring accurate energy accounting. | Use Scenario: High-side current sensing on DC-link of regenerative braking converter to monitor回馈 power into 400V/800V battery. IC Role / Device Role / Timing Role: Common-mode tolerant amplifier surviving 120V transients while measuring bidirectional energy flow. Use Value: −20V to +120V survival rating prevents latch-up during brake transient events; 1µs settling enables 10kHz power loop control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240B3QDRQ1 | Same 50V/V gain, but lower Grade 1 temp range (−40°C to +125°C); ±200µV max offset; no enhanced PWM rejection circuitry. | Limited to cabin-mounted ECUs or lower-temp inverter locations; requires external filtering for 100kHz+ PWM. | Select when cost sensitivity outweighs under-hood temperature or PWM noise requirements. |
| MAX40056ATA+T | 50V/V gain, −5V to 110V common-mode, but only 500kHz bandwidth and 3.5V/µs slew rate; ±125µV offset; no AEC-Q100 Grade 0 rating. | Suitable for non-safety-critical 12V/48V systems; not qualified for engine bay or ASIL-B designs. | Choose for industrial or commercial 48V HEV subsystems where automotive qualification is not mandated. |
Compared with INA240B3QDRQ1 and MAX40056ATA+T, the INA241B3QDRQ1 uniquely combines AEC-Q100 Grade 0 operation, 1.1MHz bandwidth, and hardware-enhanced PWM rejection - making it the only option for high-fidelity current sensing in next-generation 800V traction inverters requiring <1µs fault response.
Availability
INA241B3QDRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo control, starter/generator inverters, and regenerative braking systems requiring stable component supply across automotive production lifecycles.
Supply support for INA241B3QDRQ1 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 engineered specifically for high-accuracy, high-CMRR current sensing in AEC-Q100-compliant traction inverters, battery management, and chassis control systems - prioritizing PWM noise immunity and extended temperature reliability.
FAQ
What is the maximum common-mode voltage the INA241B3QDRQ1 can withstand continuously?
The INA241B3QDRQ1 has an operational common-mode input range of −5V to +110V, meaning it functions correctly across that span during normal operation. Its survival rating extends to −20V to +120V, allowing brief exposure to transients like load dump or inductive kickback without damage - critical for 48V and 800V automotive systems where such events occur.
Does the INA241B3QDRQ1 require external components for basic operation?
Yes - the INA241B3QDRQ1 requires a 1µF ceramic decoupling capacitor placed within 1mm of the VS pin, and the NC pin must be connected to GND per TI's layout guidelines. REF1 and REF2 pins must be configured (e.g., tied to GND or Vs/2) to set output common-mode level; no external gain-setting resistors are needed since gain is fixed at 50V/V.
How does the enhanced PWM rejection in the INA241B3QDRQ1 improve system performance?
The INA241B3QDRQ1's enhanced PWM rejection holds its output for 1µs during large common-mode transients (e.g., 125kHz gate-drive edges), then relies on 104dB AC-CMRR at 100kHz to attenuate residual disturbances. This eliminates output ringing and false overcurrent triggers - enabling direct connection to SiC inverter half-bridges without RC filters or digital post-processing delays.
Is the INA241B3QDRQ1 pin-compatible with other devices in the INA241x-Q1 family?
Yes - all INA241x-Q1 variants (A1–A5, B1–B5) share identical pinouts across DDF (SOT-23-8), DGK (VSSOP-8), D (SOIC-8), and DGS (VSSOP-10) packages. The INA241B3QDRQ1 uses the DDF package and is functionally and physically interchangeable with INA241A3QDRQ1 or INA241B3EDRQ1 in the same footprint, differing only in offset, drift, and temperature grade.
What is the typical quiescent current of the INA241B3QDRQ1 and how does it vary with temperature?
The INA241B3QDRQ1 draws 2.5mA typical quiescent current at 25°C, rising to 3.2mA maximum across −40°C to +150°C. This stable, low IQ enables continuous current monitoring in always-on safety subsystems without significant thermal impact - especially valuable in compact EPS modules where board space and heat dissipation are constrained.
INA241B3QDRQ1 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
INA241B3QDRQ1 FAQ
1.How can I place an order for INA241B3QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B3QDRQ1 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 INA241B3QDRQ1 reliable?
The price and inventory of INA241B3QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B3QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B3QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B3QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B3QDRQ1?
INA241B3QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B3QDRQ1 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 INA241B3QDRQ1?
For technical support, including INA241B3QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B3QDRQ1 requirements.
6.How does Aetrix verify that INA241B3QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B3QDRQ1 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 INA241B3QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B3QDRQ1?
All INA241B3QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B3QDRQ1, 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 INA241B3QDRQ1 part is unused and in its original packaging.
Return procedure for INA241B3QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B3QDRQ1 Tags
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