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Texas Instruments INA241A3QDGKRQ1
- Part No.:
- INA241A3QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA241A3QDGKRQ1.pdf
- Description:
- AEC-Q100, -4-V TO 110-V BIDIRECT
- Quantity:
- Payment:
- Shipping:
Inventory:2,476
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Product details
Overview
INA241A3QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to 125°C) ultra-precise bidirectional current sense amplifier with 50V/V gain, −5V to 110V common-mode input range, ±10µV max offset voltage, and 1.1MHz bandwidth-designed for high-side/low-side motor current monitoring in electric power steering and regenerative braking systems.
For engineers reviewing the INA241A3QDGKRQ1 datasheet, INA241A3QDGKRQ1 pinout, INA241A3QDGKRQ1 application, or INA241A3QDGKRQ1 equivalent, key selection criteria include its enhanced PWM rejection up to 125kHz, 166dB DC-CMRR, ±0.01% max gain error, and VSSOP-8 package compatibility with automotive-grade thermal performance (RθJA = 167.2°C/W).
Technical Context
The INA241A3QDGKRQ1 implements a zero-drift, multistage amplifier topology optimized for high-speed bidirectional sensing under large common-mode transients. Its enhanced PWM rejection circuitry actively suppresses ΔV/Δt disturbances by holding output for 1µs after each transient edge, then relying on 104dB AC-CMRR at 100kHz for subsequent attenuation.
It supports flexible reference configuration via dual REF pins (REF1/REF2), enabling output level shifting from GND to VS; operates from 2.7V–20V supply; draws 2.5mA quiescent current; and maintains 1.1MHz bandwidth and 8V/µs slew rate across all gains-including this 50V/V variant-enabling sub-microsecond overcurrent detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50V/V - sets full-scale output to 2.5V for 50mV shunt drop, optimizing dynamic range with standard ADC inputs. |
| Common-mode range | −5V to 110V - enables direct high-side sensing on 48V/60V bus systems without level-shifting or isolation. |
| DC CMRR | 166dB - rejects >20 million:1 common-mode voltage variation, critical for accurate low-mV sensing in noisy motor drives. |
| Offset voltage | ±10µV max - contributes ≤0.2% error at 5mV sense voltage, supporting <1% total measurement accuracy. |
| Bandwidth | 1.1MHz - resolves fast current transients (e.g., MOSFET switching edges) with ≤1µs 1% settling time. |
| Supply range | 2.7V to 20V - compatible with 3.3V, 5V, and 12V automotive subsystem rails without external regulators. |
| Quiescent current | 2.5mA - enables low-power operation in always-on vehicle modules without thermal derating. |
Pinout & Package
VSSOP-8 package (DGK): 3mm × 4.9mm body, 0.65mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant, qualified per AEC-Q100 Grade 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN− | Current-sense negative input | Connects to load side (high-side) or ground side (low-side) of shunt; handles −5V to 110V common-mode. |
| GND | Ground reference | Analog ground return; must be low-impedance path to minimize noise coupling into sensitive inputs. |
| REF2 | Reference voltage input | Adjusts output baseline; tied to 0V–VS to set output mid-rail or single-ended swing. |
| NC | No-connect terminal | Reserved pin; must be connected to GND per datasheet to ensure stability and EMI performance. |
| OUT | Amplified output | Delivers 50×(VIN+−VIN−) + VREF; rail-to-rail capable with 8mV min swing to GND and VS−0.2V. |
| VS | Power supply | 2.7V–20V analog supply; decoupling capacitor required within 1cm of pin for PWM rejection integrity. |
| REF1 | Reference voltage input | Paired with REF2 to define output offset; differential reference configuration enables bidirectional zero-center output. |
| IN+ | Current-sense positive input | Connects to bus-voltage side (high-side) or load side (low-side); matched with IN− for CMRR optimization. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced PWM rejection | Suppresses common-mode transients up to 125kHz via 1µs hold + high AC-CMRR, eliminating output ringing during gate-drive switching. |
| Bidirectional sensing | Supports both sourcing and sinking current measurement using dual REF pins to center output at mid-supply. |
| Ultra-low offset drift | ±0.1µV/°C max - ensures <1µV total drift over −40°C to 125°C, preserving accuracy without calibration. |
| Survival voltage rating | −20V to 120V - withstands load-dump and jump-start transients in 12V/48V automotive systems without damage. |
| High small-signal bandwidth | 1.1MHz at 50V/V gain - enables real-time current loop control in EPS and eTurbo applications with <1µs response. |
Applications
| eTurbo / Electric Turbocharger | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48V eTurbo motor inverters during rapid boost pressure modulation. IC Role / Device Role / Timing Role: High-side bidirectional current sense amplifier with 125kHz PWM rejection, placed inline with motor phases. Use Value: Enables precise torque control and overcurrent shutdown within 1µs, preventing IGBT failure during transient overload. | Use Scenario: Low-side shunt-based motor current feedback in column-assist EPS systems operating from 12V battery. IC Role / Device Role / Timing Role: Precision current amplifier interfacing to 16-bit ADC, rejecting battery ripple and solenoid switching noise. Use Value: Delivers <0.5% total current measurement error across −40°C to 125°C, improving steering assist linearity and safety compliance. |
| Starter/Generator (Belt-Driven or P0/P1) | Regenerative Braking System |
Use Scenario: Bidirectional current sensing on 48V starter-generator in mild-hybrid vehicles during cranking and regen modes. IC Role / Device Role / Timing Role: Dual-reference configured amplifier providing centered output for direction detection and magnitude scaling. Use Value: Eliminates need for external op-amps or level shifters, reducing BOM count while maintaining ±0.01% gain accuracy over temperature. | Use Scenario: High-side current monitoring of regen current flowing from traction inverter to 400V battery pack during deceleration. IC Role / Device Role / Timing Role: Wide common-mode amplifier isolating 400V+ battery domain from 3.3V MCU domain via precision analog output. Use Value: Supports ASIL-B functional safety architecture with documented FIT rate and diagnostic coverage for current path integrity checks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDGKRQ1 | Same 50V/V gain and VSSOP-8 package, but lower 120dB DC-CMRR and no enhanced PWM rejection circuitry. | Limited to non-PWM or low-frequency (<10kHz) current sensing; unsuitable for motor inverter applications. | Select when cost sensitivity outweighs PWM noise immunity requirements in simpler DC loads. |
| MAX40056ATA+T | 50V/V gain, −5V to 65V common-mode, 1.5MHz bandwidth, but only 130dB DC-CMRR and no AEC-Q100 qualification. | Not automotive-qualified; requires additional validation for safety-critical EPS or braking functions. | Consider for industrial motor drives where AEC-Q100 is not mandated and higher bandwidth is prioritized. |
Compared with INA240A3QDGKRQ1 and MAX40056ATA+T, the INA241A3QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 166dB DC-CMRR, and active 125kHz PWM rejection-making it the only option qualified for real-time current control in ASIL-B automotive subsystems without external filtering or calibration.
Availability
INA241A3QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), regenerative braking, eTurbo control, and starter/generator systems requiring stable component supply across automotive production lifecycles.
Supply support for INA241A3QDGKRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The INA241x-Q1 product line was designed specifically for high-precision, high-reliability current sensing in AEC-Q100-compliant automotive subsystems-including EPS, brake-by-wire, and 48V mild-hybrid architectures-where PWM noise immunity and long-term offset stability are critical.
FAQ
What is the maximum common-mode voltage the INA241A3QDGKRQ1 can withstand during normal operation?
The INA241A3QDGKRQ1 supports a continuous operational common-mode input range of −5V to 110V. This allows direct connection to 48V or 60V automotive buses in high-side configurations without external level-shifting. Its survival rating extends to −20V to 120V, covering load-dump and jump-start transients per ISO 7637-2.
Does the INA241A3QDGKRQ1 require external components for basic operation?
Yes-the INA241A3QDGKRQ1 requires a 0.1µF ceramic decoupling capacitor between VS and GND placed within 1cm of the pins, plus appropriate RC filtering on REF1/REF2 if used for noise-sensitive reference biasing. No external gain-setting resistors are needed since gain is fixed at 50V/V internally.
How does the enhanced PWM rejection feature of the INA241A3QDGKRQ1 improve system-level performance?
The INA241A3QDGKRQ1's enhanced PWM rejection holds its output for 1µs after each common-mode edge and leverages 104dB AC-CMRR at 100kHz to attenuate residual transients-reducing output disturbance by >90% versus standard amplifiers. This eliminates post-processing filtering and enables direct ADC sampling of clean current waveforms in motor inverter applications.
Is the INA241A3QDGKRQ1 pin-compatible with other members of the INA241x-Q1 family?
Yes-INA241A3QDGKRQ1 shares identical VSSOP-8 (DGK) pinout and footprint with all other INA241x-Q1 variants (A1–A5, B1–B5) in the same package. Gain selection is internal; no layout changes are required when upgrading or downgrading gain within the family.
What is the guaranteed maximum offset voltage drift over temperature for the INA241A3QDGKRQ1?
The INA241A3QDGKRQ1 guarantees ±0.1µV/°C maximum input-referred offset voltage drift across the full AEC-Q100 Grade 1 temperature range (−40°C to 125°C). This results in ≤12.5µV total drift over the entire range, ensuring measurement stability without periodic recalibration.
INA241A3QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA241A3QDGKRQ1 FAQ
1.How can I place an order for INA241A3QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA241A3QDGKRQ1 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 INA241A3QDGKRQ1 reliable?
The price and inventory of INA241A3QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA241A3QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA241A3QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA241A3QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA241A3QDGKRQ1?
INA241A3QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA241A3QDGKRQ1 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 INA241A3QDGKRQ1?
For technical support, including INA241A3QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA241A3QDGKRQ1 requirements.
6.How does Aetrix verify that INA241A3QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA241A3QDGKRQ1 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 INA241A3QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA241A3QDGKRQ1?
All INA241A3QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA241A3QDGKRQ1, 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 INA241A3QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA241A3QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA241A3QDGKRQ1 Tags
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