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Texas Instruments INA241B1QDRQ1
- Part No.:
- INA241B1QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241B1QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:3,335
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Product details
Overview
INA241B1QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) bidirectional current sense amplifier optimized for high-voltage motor control and power conversion systems. It delivers ±0.1% max gain error, ±150µV max input offset voltage, 1.1MHz bandwidth, −5V to 110V operational common-mode range, and enhanced PWM rejection up to 125kHz - enabling precise inline current monitoring in eTurbo, EPS, and regenerative braking circuits.
For engineers reviewing the INA241B1QDRQ1 datasheet, INA241B1QDRQ1 pinout, INA241B1QDRQ1 application, or INA241B1QDRQ1 equivalent, key selection criteria include its 10V/V fixed gain, SOT-23-8 package compatibility with space-constrained automotive PCBs, ultra-low 1µs 1% settling time, and functional safety documentation support for ISO 26262 ASIL-B system integration.
Technical Context
The INA241B1QDRQ1 employs a zero-drift, multistage amplifier topology with integrated PWM rejection circuitry that holds output for 1µs during large ΔV/Δt common-mode transients-then relies on 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth to suppress subsequent disturbances. Its input stage operates independently of supply voltage, supporting common-mode voltages beyond the 2.7V–20V VS range.
This architecture enables accurate bidirectional sensing across shunt resistors in high-side, low-side, or inline configurations while maintaining ±0.5µV/°C offset drift and 8V/µs slew rate-critical for fast overcurrent detection in 48V and 800V EV subsystems without signal corruption from switching noise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 10V/V - sets full-scale output to 1V per 100mV shunt drop; simplifies ADC interface in 3.3V systems. |
| Common-mode range | −5V to 110V - supports high-side sensing in 48V/800V traction inverters and low-side sensing in battery disconnect units. |
| Bandwidth | 1.1MHz - ensures faithful reproduction of fast current transients (e.g., IGBT turn-on spikes) without phase lag. |
| Settling time (1%) | 1µs - enables real-time overcurrent protection response within single PWM cycle at 100kHz switching. |
| DC CMRR | 166dB - rejects DC bus ripple and ground bounce in noisy power domains, preserving measurement integrity. |
| Supply voltage | 2.7V to 20V - compatible with 3.3V, 5V, and 12V automotive domain controllers without LDO overhead. |
| Quiescent current | 2.5mA - minimizes standby power in always-on vehicle modules like EPS ECUs. |
Pinout & Package
SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for automotive under-hood operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Negative input | Connect to load side (high-side) or ground side (low-side) of shunt; handles −5V to 110V common-mode. |
| GND | Ground reference | System ground return for internal biasing; must be low-impedance path to minimize noise coupling. |
| REF2 | Reference input | Adjusts output baseline; connect to 0V–VS to shift output swing for unidirectional/bidirectional use cases. |
| NC | No-connect | Reserved pin; electrically isolated and must be tied to GND per TI layout guidelines. |
| OUT | Analog output | 10×(IN+ − IN−) + (REF1 + REF2)/2; rail-to-rail capable with 8mV min swing to GND. |
| VS | Power supply | 2.7V–20V input; decoupling capacitor required within 1mm of pin for PWM rejection performance. |
| REF1 | Reference input | Paired with REF2 to set output common-mode; differential reference improves PSRR vs single-ended bias. |
| IN+ | Positive input | Connect to bus side (high-side) or load side (low-side); matched with IN− for CMRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation in EPS, brake, and starter/generator ECUs. |
| Enhanced PWM rejection | Holds output for 1µs during >100V/µs transients, then attenuates residual noise via 104dB AC-CMRR at 100kHz. |
| Bidirectional sensing | Supports both charge and discharge current measurement in regenerative braking using dual reference pins. |
| Ultra-low offset drift | ±0.5µV/°C max ensures <±1.5µV total drift over −40°C to 125°C - critical for <0.1% current accuracy. |
| Survival voltage rating | Withstands −20V to 120V fault conditions without latch-up, protecting against load dump or reverse battery events. |
Applications
| eTurbo / Electric Turbocharger | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo motor drives during rapid boost pressure modulation. IC Role / Device Role / Timing Role: High-side current sense amplifier with 1.1MHz bandwidth capturing IGBT switching edges and transient overcurrents. Use Value: Enables closed-loop torque control with <1µs fault response, preventing motor demagnetization during overload. | Use Scenario: Bidirectional current sensing in EPS column-assist motors during assist/retract transitions. IC Role / Device Role / Timing Role: Inline shunt monitor with ±150µV offset stability over temperature ensuring consistent assist feel across cabin thermal zones. Use Value: Eliminates calibration drift between cold start and hot soak, meeting ASIL-B torque accuracy requirements. |
| Starter/Generator (P4 Hybrid) | Regenerative Braking System |
Use Scenario: High-voltage (up to 110V) current measurement during engine cranking and generator mode in 48V mild hybrids. IC Role / Device Role / Timing Role: Low-side shunt amplifier surviving −20V load dump events while delivering 10V/V gain into 12-bit ADC. Use Value: Maintains measurement continuity during cranking transients, enabling seamless start-stop and energy recovery. | Use Scenario: Bidirectional DC-link current monitoring in regen inverters converting kinetic energy to battery charge. IC Role / Device Role / Timing Role: High-side amplifier rejecting 125kHz PWM noise from SiC MOSFET gate drivers during braking pulses. Use Value: Prevents false overcurrent trips during high-dV/dt regen events, increasing energy capture efficiency by >3%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Lower precision: ±0.3% gain error, ±500µV offset; no enhanced PWM rejection; 400kHz bandwidth. | Targeted at cost-sensitive 12V body electronics, not high-dV/dt traction systems. | Select when PWM frequency <50kHz and ASIL-B functional safety not required. |
| MAX40056ATA+T | Higher gain error (±0.5%), no AEC-Q100 Grade 1 rating, 850kHz bandwidth, 125°C max junction temp only. | Designed for industrial motor drives; lacks automotive qualification and 125kHz PWM rejection. | Choose only for non-automotive 48V systems where TI qualification is not mandated. |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA241B1QDRQ1 uniquely combines AEC-Q100 Grade 1 operation, 125kHz PWM rejection, and ±0.1% gain accuracy - making it the sole option for ASIL-B-compliant high-bandwidth current sensing in next-gen EV power stages.
Availability
INA241B1QDRQ1 is available at Aetrix Electronics and suitable for eTurbo control, electric power steering, and regenerative braking systems requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for INA241B1QDRQ1 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 for automotive, industrial, and personal electronics markets.
The INA241x-Q1 product line was engineered specifically for high-reliability, high-precision current sensing in AEC-Q100-compliant automotive power systems - emphasizing PWM noise immunity, wide common-mode operation, and functional safety readiness.
FAQ
What is the maximum common-mode voltage the INA241B1QDRQ1 can measure?
The INA241B1QDRQ1 supports an operational common-mode input range of −5V to 110V, with survival capability up to −20V and 120V. This allows direct high-side sensing in 48V and 800V EV architectures without external level-shifting circuitry. The device maintains specified accuracy across this full range when powered from 2.7V to 20V.
Does the INA241B1QDRQ1 require external components for PWM rejection?
No, the INA241B1QDRQ1 integrates proprietary enhanced PWM rejection circuitry - no external filters, capacitors, or compensation networks are needed. Its internal architecture holds output for 1µs during fast common-mode transients and leverages 104dB AC-CMRR at 100kHz to suppress residual noise, validated up to 125kHz switching frequencies.
What is the gain accuracy specification for the INA241B1QDRQ1 over temperature?
The INA241B1QDRQ1 has a maximum gain error of ±0.1% at room temperature, with gain error drift limited to ±5ppm/°C over −40°C to 125°C. This ensures total gain error remains within ±0.15% across the full AEC-Q100 Grade 1 temperature range - critical for maintaining current measurement fidelity in EPS and brake ECUs.
Can the INA241B1QDRQ1 be used for bidirectional current sensing?
Yes, the INA241B1QDRQ1 supports true bidirectional current sensing via its dual reference inputs (REF1 and REF2). By setting REF1 and REF2 to different potentials (e.g., 0V and VS), the output baseline shifts to accommodate both positive and negative shunt voltage polarities - enabling accurate charge/discharge current measurement in regenerative braking systems.
Which package options are available for the INA241B1QDRQ1?
The INA241B1QDRQ1 is offered exclusively in the DDF (SOT-23-8) package - a 2.9mm × 2.8mm surface-mount outline with thermal pad for enhanced heat dissipation in compact automotive modules. Other variants like INA241B1QDGQRQ1 use VSSOP-8, but the QDRQ1 suffix denotes SOT-23-8 packaging per TI's orderable part numbering.
INA241B1QDRQ1 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
INA241B1QDRQ1 FAQ
1.How can I place an order for INA241B1QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241B1QDRQ1 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 INA241B1QDRQ1 reliable?
The price and inventory of INA241B1QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241B1QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241B1QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241B1QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241B1QDRQ1?
INA241B1QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241B1QDRQ1 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 INA241B1QDRQ1?
For technical support, including INA241B1QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241B1QDRQ1 requirements.
6.How does Aetrix verify that INA241B1QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241B1QDRQ1 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 INA241B1QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241B1QDRQ1?
All INA241B1QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241B1QDRQ1, 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 INA241B1QDRQ1 part is unused and in its original packaging.
Return procedure for INA241B1QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241B1QDRQ1 Tags
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