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Texas Instruments INA241A2QDRQ1
- Part No.:
- INA241A2QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA241A2QDRQ1.pdf
- Description:
- AEC-Q100, -4V TO 110V BIDIRECTIO
- Quantity:
- Payment:
- Shipping:
Inventory:2,599
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Product details
Overview
INA241A2QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 20V/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 automotive EPS and eTurbo systems.
For engineers reviewing the INA241A2QDRQ1 datasheet, INA241A2QDRQ1 pinout, INA241A2QDRQ1 application, or INA241A2QDRQ1 equivalent, this page delivers verified specifications, SOT23-8 pin mapping, PWM rejection performance at 125kHz, functional safety documentation support, and direct alternatives for precision current sensing in switching powertrain subsystems.
Technical Context
The INA241A2QDRQ1 employs a zero-drift, high-common-mode topology with integrated enhanced PWM rejection circuitry that holds output for 1µs during large ΔV/Δt transients up to 125kHz, 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 measurement across −5V to 110V while powered from only 2.7V to 20V.
It supports bidirectional sensing via differential inputs (IN+, IN−), dual reference pins (REF1, REF2) for output level shifting, and features 8V/µs slew rate with 1µs settling to 1%-enabling accurate capture of fast overcurrent events in motor control loops without external filtering or compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20V/V - sets full-scale output to 2V per 100mV shunt drop; enables use of low-value, low-power shunts in high-current applications. |
| Common-mode range | −5V to 110V - supports high-side sensing above supply rail and low-side sensing near ground in 48V/60V automotive systems. |
| Offset voltage (max) | ±10µV - ensures ≤0.1% error at 100mV sense voltage; critical for accuracy in <10A current ranges. |
| Bandwidth | 1.1MHz - preserves signal integrity for PWM frequencies up to 125kHz with minimal phase lag in closed-loop control. |
| CMRR (DC) | 166dB - rejects bus voltage ripple and noise in high-noise traction inverters without calibration drift. |
| Supply range | 2.7V to 20V - compatible with 3.3V microcontroller I/O and 12V/15V system rails without LDO overhead. |
| Quiescent current | 2.5mA - enables always-on current monitoring in battery-sensitive modules like brake-by-wire ECUs. |
Pinout & Package
SOT23-8 package (DDF), 2.9mm × 2.8mm footprint, thermally enhanced for automotive under-hood operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− (Pin 1) | Current-sense negative input | Connect to load side (high-side) or ground side (low-side); handles −5V to 110V common-mode with 35µA bias current. |
| GND (Pin 2) | Ground reference | System ground return for internal circuitry; must be low-impedance path to minimize noise coupling. |
| REF2 (Pin 3) | Reference voltage input | Adjusts output baseline; connect to 0V–VS to shift output between GND and VS for ADC compatibility. |
| NC (Pin 4) | No-connect terminal | Internally reserved; must be tied to GND per datasheet to ensure stability and EMI immunity. |
| OUT (Pin 5) | Analog output | Rail-to-rail capable (GND + 8mV to VS − 0.2V); drives 10kΩ loads directly into MCU ADC or comparator. |
| VS (Pin 6) | Power supply | 2.7V–20V input; decoupling capacitor required within 1cm for PWM rejection integrity. |
| REF1 (Pin 7) | Reference voltage input | Paired with REF2 to define output center point; enables bidirectional output swing around programmable midpoint. |
| IN+ (Pin 8) | Current-sense positive input | Connect to bus-voltage 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-meets automotive powertrain reliability requirements without derating. |
| Enhanced PWM rejection | Suppresses output disturbance from 125kHz PWM edges via 1µs hold + high AC-CMRR; eliminates need for external RC filters. |
| Bidirectional sensing capability | Supports regenerative braking and motoring current flow with single device-reduces BOM count vs unidirectional solutions. |
| Zero-drift architecture | ±0.1µV/°C offset drift ensures stable calibration over temperature; avoids recalibration in thermal-cycling environments. |
| Survival voltage rating | Withstands −20V to 120V transient surges-protects against load-dump and inductive kickback in 48V systems. |
Applications
| eTurbo/Charger Control | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo inverter during boost and regeneration cycles. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 1.1MHz bandwidth and 125kHz PWM rejection for torque loop closure. Use Value: Enables precise current limiting and field-oriented control without signal distortion from gate-drive transients. |
Use Scenario: Low-side motor current sensing in dual-motor EPS assist units under rapid steering transients. IC Role / Device Role / Timing Role: Ultra-low-offset (±10µV) amplifier delivering 1µs settling time to detect fault currents before mechanical response. Use Value: Reduces false overcurrent trips and improves steering feel by maintaining measurement fidelity during PWM commutation. |
| Starter/Generator System | Regenerative Braking |
Use Scenario: Bidirectional current measurement in integrated starter-generator (ISG) during cranking and generation modes. IC Role / Device Role / Timing Role: −5V to 110V common-mode amplifier supporting reverse polarity during cranking and high-voltage generation. Use Value: Eliminates need for separate high-side/low-side sensors-simplifies PCB layout and improves system-level accuracy. |
Use Scenario: Motor phase current feedback in regenerative braking inverters where common-mode voltage swings exceed 80V. IC Role / Device Role / Timing Role: 166dB DC-CMRR amplifier rejecting battery ripple and inverter noise during energy recovery. Use Value: Ensures accurate state-of-charge estimation and prevents overcharging due to measurement drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDRQ1 | Same 20V/V gain, but ±20µV max offset and 100kHz PWM rejection limit; no Grade 0 option. | Limited to lower-precision EPS or HVAC blower control; not suitable for eTurbo phase current where <0.05% error is required. | Select when cost sensitivity outweighs ultra-precision needs and 125kHz PWM rejection is unnecessary. |
| MAX40056ATA+T | 20V/V gain, ±15µV offset, 1.5MHz bandwidth-but only −4V to 65V common-mode and no AEC-Q100 Grade 1 rating. | Restricted to non-safety-critical 12V/24V subsystems; cannot replace in 48V traction or high-side >65V applications. | Use only in commercial-grade 24V battery management or industrial motor drives outside automotive qualification scope. |
Compared with INA240A2QDRQ1 and MAX40056ATA+T, the INA241A2QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 125kHz PWM rejection, and ±10µV offset in a single SOT23-8 package-making it the only drop-in solution for next-generation 48V/60V automotive powertrain current sensing.
Availability
INA241A2QDRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo control, and regenerative braking systems requiring stable component supply across extended automotive temperature ranges and long production lifecycles.
Supply support for INA241A2QDRQ1 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 engineered specifically for high-reliability, high-precision current sensing in AEC-Q100-compliant automotive powertrain and chassis systems-addressing demanding requirements in EPS, eTurbo, and 48V mild-hybrid architectures.
FAQ
What is the maximum PWM frequency the INA241A2QDRQ1 can reject without output disturbance?
The INA241A2QDRQ1 provides guaranteed enhanced PWM rejection up to 125kHz, achieved through a 1µs output hold time followed by high AC-CMRR attenuation. At 100kHz, its 104dB AC-CMRR ensures minimal signal corruption; performance degrades gradually above 125kHz but remains superior to legacy amplifiers due to its 1.1MHz bandwidth and multistage rejection architecture. This makes INA241A2QDRQ1 suitable for modern SiC-based inverters operating at high switching frequencies.
Does the INA241A2QDRQ1 support bidirectional current sensing in both high-side and low-side configurations?
Yes, the INA241A2QDRQ1 supports true bidirectional sensing in high-side, low-side, and inline topologies. Its −5V to 110V common-mode input range allows IN+ and IN− to operate below ground (e.g., −5V) or far above supply (e.g., 110V), enabling seamless current direction detection without external level-shifting circuitry. The device's matched input structure and 166dB DC-CMRR preserve accuracy regardless of configuration-verified in TI's typical application circuits for EPS and starter/generator systems.
What is the purpose of the REF1 and REF2 pins on the INA241A2QDRQ1?
The REF1 and REF2 pins on the INA241A2QDRQ1 allow precise adjustment of the output voltage baseline. By applying complementary voltages (e.g., REF1 = VS, REF2 = GND), the output centers at VS/2; other combinations enable asymmetric swing or unidirectional offset. This eliminates the need for external op-amps or resistive dividers when interfacing with single-supply ADCs or comparators-directly supporting 0–5V or 0.5–4.5V input ranges without signal inversion or clipping.
How does the INA241A2QDRQ1 handle common-mode voltage transients during motor commutation?
The INA241A2QDRQ1 uses patented enhanced PWM rejection that detects large ΔV/Δt common-mode edges and holds the output steady for 1µs, preventing propagation of transient-induced errors. Subsequent transients within 3µs rely on its 104dB AC-CMRR at 100kHz and 1.1MHz bandwidth to attenuate residual noise. This dual-stage approach-validated in Figure 7-1 of the datasheet-ensures clean current waveforms even during aggressive SiC MOSFET switching in eTurbo inverters.
Is the INA241A2QDRQ1 pin-compatible with other devices in the INA241x-Q1 family?
Yes, all INA241x-Q1 variants-including INA241A1QDRQ1, INA241A2QDRQ1, INA241A3QDRQ1, and INA241A4QDRQ1-share identical SOT23-8 (DDF), VSSOP-8 (DGK), SOIC-8 (D), and VSSOP-10 (DGS) packages and pinouts. Gain selection is internal and fixed per part number; no external resistor changes or layout modifications are needed when upgrading or downgrading gain in the same package. This simplifies design reuse and BOM rationalization across vehicle platforms.
INA241A2QDRQ1 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
INA241A2QDRQ1 FAQ
1.How can I place an order for INA241A2QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A2QDRQ1 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 INA241A2QDRQ1 reliable?
The price and inventory of INA241A2QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A2QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A2QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A2QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A2QDRQ1?
INA241A2QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A2QDRQ1 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 INA241A2QDRQ1?
For technical support, including INA241A2QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A2QDRQ1 requirements.
6.How does Aetrix verify that INA241A2QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A2QDRQ1 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 INA241A2QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A2QDRQ1?
All INA241A2QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A2QDRQ1, 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 INA241A2QDRQ1 part is unused and in its original packaging.
Return procedure for INA241A2QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A2QDRQ1 Tags
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