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Texas Instruments INA241A5QDDFRQ1
- Part No.:
- INA241A5QDDFRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
INA241A5QDDFRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:1,865
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Product details
Overview
INA241A5QDDFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 200V/V gain, −5V to 110V common-mode input range, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-side motor current monitoring in electric power steering and regenerative braking systems.
For engineers reviewing the INA241A5QDDFRQ1 datasheet, INA241A5QDDFRQ1 pinout, INA241A5QDDFRQ1 application, or INA241A5QDDFRQ1 equivalent, this page delivers verified specifications, SOT-23-8 pin mapping, automotive-grade PWM rejection up to 125kHz, and real-world implementation guidance for high-voltage switching systems.
Technical Context
The INA241A5QDDFRQ1 employs a zero-drift, high-common-mode topology enabling operation beyond its 2.7V–20V supply rail-supporting −5V to 110V input common-mode voltages while maintaining 166dB DC-CMRR and 104dB AC-CMRR at 100kHz. Its enhanced PWM rejection circuitry suppresses output disturbance during fast ΔV/Δt transients.
It delivers 8V/µs slew rate and 1µs settling time to 1%, enabling accurate capture of transient overcurrent events in motor control loops. The dual reference inputs (REF1/REF2) allow flexible output level shifting across the full supply range without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200V/V - enables precise low-mV shunt sensing with full-scale output swing at low current levels |
| Common-mode range | −5V to 110V - supports high-side, low-side, and inline sensing in 48V/60V automotive systems |
| Offset voltage (max) | ±10µV - ensures sub-100nΩ effective shunt error at 50A, critical for torque accuracy in EPS |
| DC CMRR | 166dB - rejects battery rail noise and ground bounce in noisy vehicle environments |
| Small-signal BW | 1.1MHz - captures fast current transients during MOSFET switching in eTurbo inverters |
| Supply range | 2.7V to 20V - compatible with 3.3V/5V/12V logic domains and wide-input DC/DC supplies |
| Quiescent current | 2.5mA - enables always-on current monitoring in ASIL-B safety-critical subsystems |
Pinout & Package
SOT-23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for high-power density PCB layouts in space-constrained automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Negative current-sense input | Connects to load side of shunt in high-side config or ground side in low-side config |
| GND | Analog ground reference | Provides stable return path for internal bias and reference circuits; must be star-connected |
| REF2 | Reference voltage input | Adjusts output baseline; tied to VS/2 for bidirectional zero-centered output |
| NC | No-connect terminal | Internally reserved; must be connected to GND per datasheet layout guidelines |
| OUT | Amplified output | Delivers 200×(IN+ − IN−) + REF1/2; drives ADC or comparator directly |
| IN+ | Positive current-sense input | Connects to bus-voltage side of shunt in high-side config or load side in low-side config |
| REF1 | Reference voltage input | Paired with REF2 to set output common-mode; enables rail-to-rail output alignment |
| VS | Power supply | 2.7V–20V analog supply; decoupling capacitor required within 1mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation in safety-critical automotive ECUs |
| Enhanced PWM rejection | Suppresses output disturbance from 125kHz switching transients via internal timing hold circuit |
| Bidirectional measurement | Supports forward/reverse current flow detection using dual reference configuration |
| High AC CMRR (104dB @ 100kHz) | Maintains accuracy during fast common-mode edges in inverter half-bridge switching |
| Zero-drift architecture | Ensures <±0.1µV/°C offset drift-critical for thermal stability in under-hood EPS modules |
Applications
| Electric Power Steering (EPS) | eTurbo / 48V Boost Converter |
|---|---|
Use Scenario: Real-time motor phase current monitoring during assist/damping transitions. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1µs response to detect overcurrent faults before MOSFET destruction. Use Value: Enables ASIL-C compliant torque control by eliminating offset-induced false fault triggers across temperature. | Use Scenario: Shunt-based current sensing on high-frequency SiC inverter legs driving turbocharger motor. IC Role / Device Role / Timing Role: PWM-rejecting amplifier capturing true current waveform despite 100kHz+ common-mode dv/dt. Use Value: Reduces need for external RC filtering, preserving signal fidelity for closed-loop current regulation. |
| Starter/Generator (Belt-Driven) | Regenerative Braking Inverter |
Use Scenario: Bidirectional current measurement during engine cranking (high surge) and generator mode (regen). IC Role / Device Role / Timing Role: Precision amplifier with ±10µV offset enabling accurate energy accounting over 1000-cycle lifetime. Use Value: Improves state-of-charge estimation accuracy by >0.5% through reduced offset drift over temperature. | Use Scenario: High-side current feedback in IGBT-based regen inverter handling 300A peak currents. IC Role / Device Role / Timing Role: Wide common-mode (−5V to 110V) amplifier surviving battery reversal and load dump transients. Use Value: Eliminates need for isolated amplifiers or Hall sensors-reducing BOM cost and board area by 40%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A5QDDFRQ1 | Same 200V/V gain and SOT-23-8 package, but lower CMRR (150dB DC) and no enhanced PWM rejection | Limited to lower-switching-frequency (<50kHz) applications without aggressive common-mode transients | Select when cost sensitivity outweighs PWM rejection requirement in non-inverter EPS subsystems |
| MAX40056ATA+T | 200V/V gain, −5V to 65V common-mode, 1.5MHz BW, but only 130dB DC-CMRR and no AEC-Q100 Grade 1 rating | Not qualified for under-hood deployment; suitable for cabin or ADAS domain controllers only | Choose for non-safety-critical 12V systems where higher bandwidth offsets lower CMRR and qualification gaps |
Compared with INA240A5QDDFRQ1 and MAX40056ATA+T, the INA241A5QDDFRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 166dB DC-CMRR, and active PWM rejection-making it the only option for ASIL-B compliant high-frequency motor control in 48V architectures.
Availability
INA241A5QDDFRQ1 is available at Aetrix Electronics and suitable for electric power steering, eTurbo control, and regenerative braking systems requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for INA241A5QDDFRQ1 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.
The INA241x-Q1 product line was engineered specifically for high-accuracy, high-CMRR current sensing in AEC-Q100-compliant automotive powertrain and chassis systems-addressing demanding requirements in EPS, starter/generator, and 48V mild-hybrid architectures.
FAQ
What is the maximum common-mode voltage the INA241A5QDDFRQ1 can withstand during continuous operation?
The INA241A5QDDFRQ1 supports a continuous operational common-mode input range of −5V to 110V. Its survival rating extends to −20V to 120V, allowing tolerance of load-dump transients and battery reversal events without damage. This capability is validated across the full −40°C to 125°C operating temperature range for Grade 1 qualification.
Does the INA241A5QDDFRQ1 require external passive components for stable operation in high-noise automotive environments?
No, the INA241A5QDDFRQ1 integrates enhanced PWM rejection circuitry and achieves 166dB DC-CMRR without external filters. Only a 100nF ceramic decoupling capacitor placed within 1mm of the VS pin is required. Its zero-drift architecture eliminates the need for external offset trimming or calibration circuitry in production systems.
How does the INA241A5QDDFRQ1 achieve bidirectional current sensing with a single supply?
The INA241A5QDDFRQ1 uses dual reference inputs (REF1 and REF2) to establish an output common-mode voltage. When REF1 = REF2 = VS/2, the output centers at VS/2-enabling positive and negative current measurements relative to zero. This eliminates the need for split supplies or level-shifting circuitry in 3.3V or 5V microcontroller interfaces.
What is the functional difference between the 'A' and 'B' versions of the INA241x-Q1 family?
The 'A' version (e.g., INA241A5QDDFRQ1) offers ultra-precision performance: ±0.01% max gain error, ±10µV max offset, and ±0.1µV/°C drift. The 'B' version trades precision for cost: ±0.1% gain error, ±150µV offset, and ±0.5µV/°C drift. Both share identical pinout, package, and PWM rejection features.
Can the INA241A5QDDFRQ1 be used in high-side configurations with 48V battery systems?
Yes-the INA241A5QDDFRQ1 is explicitly designed for high-side sensing in 48V systems. Its −5V to 110V common-mode range accommodates battery voltages up to 58V (including transients), and its 200V/V gain enables accurate measurement of sub-10mΩ shunts at 100A+ currents. Layout guidelines mandate Kelvin connections to the shunt for optimal accuracy.
INA241A5QDDFRQ1 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:
- -
- Slew Rate:
- 8V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.1 MHz
- Current - Input Bias:
- 35 µA
- Voltage - Input Offset:
- 2 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
INA241A5QDDFRQ1 FAQ
1.How can I place an order for INA241A5QDDFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A5QDDFRQ1 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 INA241A5QDDFRQ1 reliable?
The price and inventory of INA241A5QDDFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A5QDDFRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A5QDDFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A5QDDFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A5QDDFRQ1?
INA241A5QDDFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A5QDDFRQ1 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 INA241A5QDDFRQ1?
For technical support, including INA241A5QDDFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A5QDDFRQ1 requirements.
6.How does Aetrix verify that INA241A5QDDFRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A5QDDFRQ1 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 INA241A5QDDFRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A5QDDFRQ1?
All INA241A5QDDFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A5QDDFRQ1, 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 INA241A5QDDFRQ1 part is unused and in its original packaging.
Return procedure for INA241A5QDDFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A5QDDFRQ1 Tags
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