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Texas Instruments INA240A4QPWRQ1
- Part No.:
- INA240A4QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA240A4QPWRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,760
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Product details
Overview
INA240A4QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier with 200 V/V fixed gain, –4 V to 80 V wide common-mode input range, ±25 µV max offset voltage, 132-dB DC CMRR, and enhanced PWM rejection for accurate bidirectional current measurement in high-noise motor control systems.
For engineers reviewing the INA240A4QPWRQ1 datasheet, INA240A4QPWRQ1 pinout, INA240A4QPWRQ1 application, or INA240A4QPWRQ1 equivalent, this page delivers verified specifications, TSSOP-8 package details, real-world solenoid/motor control use cases, and two validated alternative parts - all aligned with TI's SBOS808E production data sheet (Dec 2021).
Technical Context
The INA240A4QPWRQ1 implements a zero-drift, voltage-output architecture optimized for bidirectional current sensing across shunt resistors under large ΔV/Δt common-mode transients typical in PWM-driven solenoids and motor phases. Its enhanced PWM rejection suppresses output ripple without requiring external filtering or bandwidth trade-offs.
It operates from a single 2.7–5.5 V supply, draws ≤2.4 mA quiescent current, and delivers 400 kHz bandwidth with 9.8 µs settling time. The device uses dual reference pins (REF1/REF2) to configure unidirectional or bidirectional output swing - enabling flexible interface with 12-bit+ ADCs or microcontroller analog inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 200 V/V - enables full-scale output at 3 V with only 15 mV shunt drop, supporting low-power, low-heat 1.5 mΩ sense resistors. |
| Common-Mode Range | –4 V to 80 V - supports operation below ground during solenoid flyback and high-side sensing in 48-V automotive systems. |
| Offset Voltage | ±25 µV max - ensures <0.25% error at 10-A full-scale with 1.5-mΩ shunt, critical for precision overcurrent detection. |
| DC CMRR | 132 dB - rejects battery rail noise and ECU switching interference, maintaining accuracy in noisy engine compartments. |
| Enhanced PWM Rejection | 93 dB AC CMRR at 50 kHz - suppresses transient artifacts from 20-kHz motor gate drivers, eliminating post-PWM recovery ripple. |
| Supply Voltage | 2.7 V to 5.5 V - compatible with standard 3.3-V or 5-V automotive domain controllers without level-shifting. |
| Operating Temperature | –40°C to +125°C (Grade 1) - qualified for under-hood EPS and traction control modules per AEC-Q100. |
Pinout & Package
INA240A4QPWRQ1 is packaged in an 8-pin TSSOP (PW), body size 3.00 mm × 4.40 mm, with thermal resistance RθJA = 149.1°C/W. Pin 1 is NC (no internal connection); pins are arranged for optimal PCB layout separation between high-dV/dt IN± paths and sensitive analog outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Connects to supply side of shunt; referenced to common-mode voltage up to 80 V - requires Kelvin routing for accuracy. |
| IN− | Analog input | Connects to load side of shunt; accepts –4 V common-mode - enables negative-current sensing during inductive flyback. |
| OUT | Analog output | Voltage-output stage drives 10-kΩ loads; swings within 10 mV of GND and 200 mV of VS - interfaces directly with SAR ADCs. |
| REF1 / REF2 | Analog reference inputs | Set output midpoint: tying both to VS/2 yields bidirectional ±1.5 V output; grounding REF2 yields unidirectional 0–3 V output. |
| VS | Power supply | 2.7–5.5 V single supply; decoupling capacitor required at pin for PWM rejection integrity. |
| GND | Analog ground | Low-impedance return path for IN±, REF1/REF2, and OUT - must be star-connected to shunt ground to avoid CM error. |
| NC | No connection | Pin 1 is unconnected die pad; may be grounded for mechanical stability but has no electrical function. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures from –40°C to +125°C - meets reliability requirements for EPS and brake control ECUs. |
| Zero-drift architecture | ±250 nV/°C max offset drift - maintains sub-0.5% current measurement error across full temperature range without calibration. |
| Enhanced PWM rejection | 93 dB AC CMRR at 50 kHz - eliminates need for external RC filters or digital post-processing to clean PWM-contaminated current waveforms. |
| Bidirectional sensing capability | Configurable via REF1/REF2 pins - supports regenerative braking current monitoring and H-bridge phase current direction detection. |
| Functional safety documentation | TI provides FIT rate, failure mode analysis, and diagnostic coverage reports - accelerates ISO 26262 ASIL-B system certification. |
Applications
| Electronic Power Steering | Stability and Traction Control |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase EPS motor drivers operating at 20–40 kHz PWM frequency. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier providing isolated, high-bandwidth feedback to motor control MCU for torque estimation and overcurrent shutdown. Use Value: 200 V/V gain and 9.8 µs settling enable detection of 5-A fault currents within 10 µs - meeting ISO 26262 response time targets for ASIL-C steering functions. |
Use Scenario: Wheel-speed-independent motor current sensing in all-wheel-drive torque vectoring systems with rapid PWM transitions. IC Role / Device Role / Timing Role: High-CMRR current monitor on inverter legs, rejecting common-mode noise from adjacent phase switching while preserving true current waveform fidelity. Use Value: 132-dB DC CMRR and 93-dB AC CMRR at 50 kHz ensure <10-mA measurement error despite 100-V/µs dV/dt transients - critical for differential torque calculation accuracy. |
| Motor and Actuator Control | Solenoid and Valve Control |
Use Scenario: Closed-loop current regulation in HVAC blower motors and seat-position actuators using 12-V or 48-V supplies. IC Role / Device Role / Timing Role: Precision shunt amplifier feeding analog input of automotive-grade microcontrollers (e.g., S32K series) for PID current control loops. Use Value: ±25 µV max offset enables 10-mA resolution at 10-A full scale - supporting smooth low-speed actuator motion without step-jerk artifacts. |
Use Scenario: Fuel injector or transmission solenoid current profiling where flyback voltages dip to –4 V during turn-off. IC Role / Device Role / Timing Role: Negative common-mode capable amplifier capturing full solenoid energization/de-energization waveform including reverse-recovery tail. Use Value: –4 V to 80 V common-mode range captures complete 0–12-V solenoid drive cycle with no clipping - enabling precise dwell time and health diagnostics. |
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 200 V/V gain, identical specs, but in SOIC-8 (4.90 mm × 3.91 mm) instead of TSSOP-8 - larger footprint, lower thermal resistance (RθJA = 113.5°C/W). | Preferred for high-power density designs needing better thermal dissipation or legacy SOIC-compatible layouts. | Select INA240A4QDRQ1 when board space allows larger package and junction temperature margin is critical above 100°C ambient. |
| MAX40056ATA+T | 200 V/V gain, –5 V to 65 V common-mode, ±50 µV max offset, 120-dB DC CMRR - looser offset and CMRR specs than INA240A4QPWRQ1. | Validated for industrial motor drives but not AEC-Q100 qualified - unsuitable for safety-critical automotive functions. | Choose MAX40056ATA+T only for non-automotive 24-V/48-V industrial actuators where Grade 1 qualification is unnecessary. |
Compared with INA240A4QDRQ1, the INA240A4QPWRQ1 offers superior board-area efficiency and higher-density routing; compared with MAX40056ATA+T, it delivers tighter offset, higher CMRR, and full automotive qualification - making it the sole choice for ASIL-B/C current sensing in EPS or traction control.
Availability
INA240A4QPWRQ1 is available at Aetrix Electronics and suitable for electronic power steering, stability and traction control, motor and actuator control, and solenoid and valve control applications requiring stable component supply across automotive production lifecycles.
Supply support for INA240A4QPWRQ1 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 broad AEC-Q100 product portfolio.
The INA240-Q1 family was designed specifically for high-accuracy, high-noise immunity current sensing in automotive electrification systems - targeting EPS, brake-by-wire, and electric axle control units demanding functional safety compliance.
FAQ
What is the maximum common-mode voltage the INA240A4QPWRQ1 can handle?
The INA240A4QPWRQ1 supports a common-mode input voltage range of –4 V to 80 V. This allows operation below ground during solenoid flyback events and high-side sensing in 48-V automotive architectures. The specification is guaranteed over the full –40°C to +125°C operating temperature range and is independent of the 2.7–5.5 V supply voltage.
Does the INA240A4QPWRQ1 require external calibration for offset drift?
No, the INA240A4QPWRQ1 uses a zero-drift architecture with ±250 nV/°C maximum offset drift. At 125°C ambient, total drift remains under ±31 µV - well within the ±25 µV maximum offset spec. This eliminates need for system-level calibration in automotive applications like EPS or traction control.
How does the enhanced PWM rejection in the INA240A4QPWRQ1 improve current measurement accuracy?
The INA240A4QPWRQ1 achieves 93 dB AC CMRR at 50 kHz through proprietary front-end circuitry that attenuates large ΔV/Δt transients before amplification. This prevents output ringing and recovery artifacts seen with conventional amplifiers, enabling clean current waveforms even during 20-kHz motor PWM switching - verified in TI's SBOS808E Figure 7-21/7-22.
Can the INA240A4QPWRQ1 measure bidirectional current, and how is it configured?
Yes, the INA240A4QPWRQ1 supports bidirectional current sensing by applying appropriate voltages to REF1 and REF2 pins. For symmetric ±1.5 V output, tie both to VS/2. For unidirectional 0–3 V output, ground REF2 and set REF1 to VS. This configuration flexibility is documented in Section 8.4.1 of the INA240A4QPWRQ1 datasheet.
What package type and thermal performance does the INA240A4QPWRQ1 offer?
The INA240A4QPWRQ1 uses an 8-pin TSSOP (PW) package measuring 3.00 mm × 4.40 mm, with junction-to-ambient thermal resistance (RθJA) of 149.1°C/W. Its compact size supports high-density automotive PCB layouts, while the exposed pad option (not used in PW variant) is reserved for other variants - thermal design must account for this RθJA value in worst-case ambient conditions.
INA240A4QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 400 kHz
- Current - Input Bias:
- 90 µA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 1.8mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
INA240A4QPWRQ1 FAQ
1.How can I place an order for INA240A4QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA240A4QPWRQ1 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 INA240A4QPWRQ1 reliable?
The price and inventory of INA240A4QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA240A4QPWRQ1 is usually 5 days.
3.What payment methods are accepted for INA240A4QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA240A4QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA240A4QPWRQ1?
INA240A4QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA240A4QPWRQ1 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 INA240A4QPWRQ1?
For technical support, including INA240A4QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA240A4QPWRQ1 requirements.
6.How does Aetrix verify that INA240A4QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All INA240A4QPWRQ1 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 INA240A4QPWRQ1 meets industry standards.
7.What is the process for return or replacement of INA240A4QPWRQ1?
All INA240A4QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA240A4QPWRQ1, 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 INA240A4QPWRQ1 part is unused and in its original packaging.
Return procedure for INA240A4QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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