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Texas Instruments INA241A4QDRQ1
- Part No.:
- INA241A4QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241A4QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
INA241A4QDRQ1 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, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-side/low-side motor phase current monitoring in electric power steering and regenerative braking systems.
For engineers reviewing the INA241A4QDRQ1 datasheet, INA241A4QDRQ1 pinout, INA241A4QDRQ1 application, or INA241A4QDRQ1 equivalent, this page delivers verified specifications, SOT23-8 pin mapping, automotive-grade PWM rejection performance up to 125kHz, and real-world design context for eTurbo, EPS, and starter/generator control loops.
Technical Context
The INA241A4QDRQ1 employs a zero-drift, high-CMRR architecture with dedicated enhanced PWM rejection circuitry that holds output for 1µs during fast common-mode transients (ΔV/Δt), then relies on 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth to suppress residual disturbances. Its input stage operates independently of supply voltage, enabling −5V to 110V common-mode sensing even when VS = 2.7V–20V.
It supports bidirectional current measurement via differential input (IN+, IN−), dual reference inputs (REF1, REF2) for output level shifting, and features 8V/µs slew rate with 1µs settling to 1%-critical for accurate overcurrent detection in fast-switching SiC/GaN inverter legs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100V/V - sets full-scale output to 100× shunt voltage drop; enables use of low-value, low-power shunts (e.g., 0.5mΩ) while maintaining 1V output per 10A sensed. |
| Common-mode range | −5V to 110V - supports direct high-side sensing on 48V/60V bus rails without level-shifting; survives −20V to 120V fault conditions. |
| Input offset voltage | ±10µV max - ensures ≤0.1% error at 100mV shunt drop; drift ≤0.1µV/°C maintains accuracy across automotive temperature range. |
| Bandwidth | 1.1MHz - captures fast current transients (e.g., short-circuit events in <1µs); enables closed-loop response in high-frequency motor control. |
| PWM rejection | Up to 125kHz - suppresses switching noise from SiC inverters; output disturbance limited to <0.2V during 100V/100ns common-mode edge. |
| Supply range | 2.7V to 20V - compatible with 3.3V/5V logic domains and 12V/15V analog supplies; draws only 2.5mA quiescent current. |
| CMRR | 166dB DC, 104dB @100kHz - rejects bus ripple and ground bounce in noisy power stages; preserves signal integrity in shared PCB return paths. |
Pinout & Package
INA241A4QDRQ1 is packaged in an 8-pin SOT23-8 (DDF) package measuring 2.9mm × 2.8mm, optimized for space-constrained automotive modules and motor driver PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense negative input | Connect to load side (high-side) or ground side (low-side) of shunt; handles −5V to 110V common-mode voltage independent of VS. |
| GND (Pin 2) | Analog ground reference | System ground connection for internal bias network; must be low-impedance path to minimize noise coupling into precision analog core. |
| REF2 (Pin 3) | Reference voltage input 2 | Adjusts output common-mode level; connect to 0V–VS to set OUT baseline (e.g., 2.5V for bipolar current sensing). |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be connected to GND per datasheet to ensure stable operation and EMI immunity. |
| OUT (Pin 5) | Amplified output | Delivers 100×(IN+ − IN−) + (REF1 + REF2)/2; rail-to-rail swing (to GND +8mV / VS −0.2V) interfaces directly with ADCs or comparators. |
| VS (Pin 6) | Power supply | 2.7V–20V analog supply; decoupling capacitor (≥1µF ceramic) required within 2mm of pin to maintain PSRR >120dB. |
| REF1 (Pin 7) | Reference voltage input 1 | Paired with REF2 to define output offset; differential reference configuration enables true bidirectional zero-center output. |
| IN+ (Pin 8) | Current-sense positive input | Connect to bus-voltage side (high-side) or load side (low-side) of shunt; matched with IN− for 166dB CMRR. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | 1µs output hold + high AC-CMRR enables clean current measurement in 125kHz SiC inverter legs without external filtering. |
| Bidirectional sensing | Dual reference inputs (REF1/REF2) allow precise zero-center output for motor regeneration and motoring current direction detection. |
| Ultra-low offset drift | ±0.1µV/°C drift ensures ≤0.5% total error over −40°C to 125°C-critical for torque accuracy in EPS and brake-by-wire systems. |
| High-speed transient response | 1µs settling to 1% and 8V/µs slew rate support real-time overcurrent protection with <2µs reaction time in safety-critical applications. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to 125°C ambient operation with lifetime reliability testing per automotive stress standards (HTOL, TC, UHAST). |
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 100V/V gain, placed inline with motor phases to feed current feedback to MCU PWM controller. Use Value: ±10µV offset and 1.1MHz bandwidth enable <1% torque error at 20kHz switching frequency; enhanced PWM rejection eliminates need for RC snubbers. |
Use Scenario: Low-side shunt-based motor current sensing in column-assist EPS to detect assist torque and fault conditions (stall, short). IC Role / Device Role / Timing Role: Bidirectional amplifier with REF1/REF2 configured for ±2.5V output swing, interfacing directly with 12-bit ADC in automotive MCU. Use Value: 166dB DC-CMRR rejects battery ripple and ignition noise; −5V to 110V range supports reverse-polarity protection and load-dump survival. |
| Starter/Generator (Belt-Driven) | Regenerative Braking System |
Use Scenario: High-side current sensing on 48V starter-generator inverter to manage cranking current and regen energy capture. IC Role / Device Role / Timing Role: Precision amplifier with 100V/V gain and 125kHz PWM rejection, mounted adjacent to IGBT gate drivers on power module PCB. Use Value: 8V/µs slew rate and 1µs settling ensure accurate peak current capture during 500A cranking pulses; SOT23-8 footprint minimizes layout parasitics. |
Use Scenario: Bidirectional DC-link current monitoring in regenerative braking inverter to control energy flow into 48V battery during deceleration. IC Role / Device Role / Timing Role: Current sense amplifier with REF1=0V, REF2=VS/2 to generate 0–5V unidirectional output proportional to regen magnitude. Use Value: ±0.015% gain error and ±10µV offset guarantee ≤0.2% SOC estimation error over vehicle lifetime; AEC-Q100 qualification ensures field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4QDRQ1 | Same 100V/V gain and SOT23-8 package, but lower AC-CMRR (80dB @100kHz) and no enhanced PWM rejection circuitry. | Limited to <50kHz switching frequencies; requires external filtering in SiC inverter designs. | Select when cost sensitivity outweighs PWM noise immunity requirements in 48V mild-hybrid systems. |
| MAX40056ATA+T | 100V/V gain, −5V to 65V common-mode range, 1.5MHz bandwidth, but only 130dB DC-CMRR and no AEC-Q100 qualification. | Not suitable for under-hood applications above 105°C ambient; lacks automotive reliability validation. | Consider for non-automotive industrial motor drives where extended temperature range is not required. |
Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA241A4QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 125kHz PWM rejection, and 166dB DC-CMRR-making it the only option qualified for safety-critical EPS and brake system current sensing without derating or additional filtering.
Availability
INA241A4QDRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), regenerative braking, and eTurbo control systems requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing from authorized channels.
Supply support for INA241A4QDRQ1 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 decades of automotive IC design expertise and ISO/TS 16949-certified manufacturing.
The INA241x-Q1 product line was developed specifically for high-reliability, high-precision current sensing in next-generation electric vehicle powertrains-including EPS, eAxles, and 48V mild hybrids-where PWM noise immunity and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum common-mode voltage the INA241A4QDRQ1 can withstand during normal operation?
The INA241A4QDRQ1 operates over a common-mode input range of −5V to 110V, meaning it can accurately measure shunt voltage drops while its inputs sit anywhere within that window-even exceeding the 2.7V–20V supply voltage. This allows direct high-side sensing on 48V and 60V automotive buses without external level-shifting circuitry. The device also survives −20V to 120V during fault conditions.
Does the INA241A4QDRQ1 require external components for stable operation in automotive environments?
Yes-the INA241A4QDRQ1 requires a ≥1µF ceramic decoupling capacitor placed within 2mm of the VS pin to maintain specified PSRR and stability. Pin 4 (NC) must be connected to GND per TI's layout guidelines to ensure optimal EMI immunity and PWM rejection performance. No external gain-setting resistors are needed, as gain is fixed at 100V/V internally.
How does the enhanced PWM rejection feature of the INA241A4QDRQ1 improve system-level accuracy?
The INA241A4QDRQ1's enhanced PWM rejection holds its output for 1µs during fast common-mode transients (e.g., 100V/100ns edges), then leverages 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth to attenuate residual noise. This prevents erroneous current readings during SiC/GaN inverter switching, eliminating the need for post-amplifier RC filters and preserving signal fidelity for real-time torque control in EPS and brake systems.
Can the INA241A4QDRQ1 be used for bidirectional current sensing without external op-amps?
Yes-the INA241A4QDRQ1 supports true bidirectional sensing natively using its dual reference inputs (REF1 and REF2). By setting REF1 = 0V and REF2 = VS/2, the output swings symmetrically around VS/2 (e.g., 2.5V for 5V supply), delivering positive voltage for forward current and negative relative to mid-scale for reverse (regen) current-enabling direct interface with single-supply ADCs.
What is the guaranteed offset voltage specification for the INA241A4QDRQ1 over temperature?
The INA241A4QDRQ1 guarantees a maximum input-referred offset voltage of ±10µV at 25°C, with drift limited to ±0.1µV/°C over the full AEC-Q100 Grade 1 range (−40°C to 125°C). This ensures total offset error remains ≤±22.5µV across temperature-critical for achieving <0.1% current measurement accuracy in high-precision motor control applications.
INA241A4QDRQ1 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:
- 3 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
INA241A4QDRQ1 FAQ
1.How can I place an order for INA241A4QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A4QDRQ1 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 INA241A4QDRQ1 reliable?
The price and inventory of INA241A4QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A4QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A4QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A4QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A4QDRQ1?
INA241A4QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A4QDRQ1 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 INA241A4QDRQ1?
For technical support, including INA241A4QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A4QDRQ1 requirements.
6.How does Aetrix verify that INA241A4QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A4QDRQ1 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 INA241A4QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A4QDRQ1?
All INA241A4QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A4QDRQ1, 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 INA241A4QDRQ1 part is unused and in its original packaging.
Return procedure for INA241A4QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A4QDRQ1 Tags
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