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Texas Instruments INA240A3QPWRQ1
- Part No.:
- INA240A3QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA240A3QPWRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
INA240A3QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier optimized for bidirectional high-side and low-side shunt monitoring in PWM-driven motor and solenoid control systems. It delivers 100 V/V fixed gain, ±25 µV max input offset, 132-dB DC CMRR, and –4 V to 80 V common-mode range while operating from 2.7–5.5 V supply. Its enhanced PWM rejection enables accurate current measurement during fast flyback transients in electronic power steering.
For engineers reviewing the INA240A3QPWRQ1 datasheet, INA240A3QPWRQ1 pinout, INA240A3QPWRQ1 application, or INA240A3QPWRQ1 equivalent, key selection criteria include its 100 V/V gain accuracy (±0.20% max), 250 nV/°C offset drift, 400 kHz bandwidth, TSSOP-8 package compatibility with PCB space-constrained automotive ECUs, and functional safety documentation support for ASIL-B system integration.
Technical Context
The INA240A3QPWRQ1 employs a zero-drift architecture with dual-stage chopper-stabilized amplification to maintain ultra-low offset and drift across –40°C to +125°C. Its enhanced PWM rejection circuitry actively suppresses ΔV/Δt-induced errors-achieving 93-dB AC CMRR at 50 kHz-without requiring external filtering or increased bandwidth that compromises stability.
This device operates as a voltage-output current-sense amplifier with fully differential input stage referenced to GND, supporting both unidirectional and bidirectional sensing via configurable REF1/REF2 pins. The 100 V/V gain version targets applications requiring 10-mV full-scale shunt drops, enabling use of low-value, low-power shunts (e.g., 1.5 mΩ at 10 A) while preserving measurement resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V fixed-sets output = 100 × (IN+ − IN−); enables 10-mV shunt drop to produce 1-V output for high-resolution ADC interfacing. |
| Input Offset Voltage | ±25 µV max-ensures ≤0.25% error at 10-mV sense voltage; critical for low-current detection in solenoid hold-phase monitoring. |
| CMRR (DC) | 132 dB-rejects battery rail noise and ground bounce in 12-V/48-V automotive systems; maintains accuracy during load dump events. |
| Common-Mode Range | –4 V to 80 V-supports operation below ground during inductive flyback and up to alternator overvoltage conditions. |
| Supply Voltage | 2.7 V to 5.5 V-compatible with standard 3.3-V or 5-V ECU rails; eliminates need for dedicated bias supplies. |
| Bandwidth | 400 kHz (–3 dB)-captures fast overcurrent events in <1 µs; sufficient for 20-kHz PWM motor control with <0.5% phase lag. |
| Quiescent Current | 2.4 mA max-minimizes standby power in always-on vehicle modules without compromising response time. |
Pinout & Package
INA240A3QPWRQ1 is packaged in an 8-pin TSSOP (PW) with 3.00 mm × 4.40 mm body size, optimized for thermal performance and automated assembly in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Connects to supply side of shunt resistor; tolerates –4 V to 80 V common-mode voltage independent of VS. |
| IN− | Analog input | Connects to load side of shunt resistor; differential pair with IN+ enables bidirectional current polarity detection. |
| GND | Analog ground | Reference node for internal circuitry and output swing; must be tied to low-impedance system ground plane. |
| VS | Power supply | Single 2.7–5.5 V rail; powers amplifier core and output stage; decoupling capacitor required within 1 cm. |
| OUT | Analog output | Voltage-output stage drives 10-kΩ loads; swings to within 50 mV of VS and 1 mV above GND for full dynamic range. |
| REF1 / REF2 | Reference inputs | Set output midpoint voltage; connecting both to VS/2 enables bidirectional sensing; grounding REF2 enables unidirectional mode. |
| NC | No connection | Pin 1 in TSSOP package-must be left floating or grounded; no internal bond wire; avoids parasitic coupling paths. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation-meets automotive engine bay and transmission control module requirements. |
| Enhanced PWM rejection | Suppresses >93 dB of 50-kHz common-mode transients-eliminates output ripple during MOSFET switching edges in EPS motor drivers. |
| Zero-drift architecture | 250 nV/°C max offset drift-maintains calibration stability over temperature without periodic auto-zero cycles or firmware compensation. |
| Bidirectional sensing capability | Configurable via REF1/REF2 pins-supports regenerative braking current measurement and forward/reverse actuator control in one hardware design. |
| Functional safety documentation | FMEA reports and FIT rate data provided-enables ISO 26262 ASIL-B decomposition for current-sensing subsystems in ADAS ECUs. |
Applications
| Electronic Power Steering | Stability and Traction Control |
|---|---|
Use Scenario: Real-time motor phase current monitoring during assist torque generation and damping control loops. IC Role / Device Role / Timing Role: High-bandwidth current-sense amplifier providing 400-kHz sampled feedback to MCU PWM timers for field-oriented control. Use Value: Enables <1-µs overcurrent fault detection to disable gate drivers before IGBT failure-meeting ISO 26262 single-point fault metrics. |
Use Scenario: Wheel-speed-dependent brake actuator coil current regulation during ABS pulse modulation. IC Role / Device Role / Timing Role: Bidirectional shunt monitor capturing both energize and release current waveforms with <25-µV offset fidelity. Use Value: Supports precise 10-mA hold-current control during valve dwell phase-reducing coil thermal stress and improving duty-cycle accuracy. |
| Motor and Actuator Control | Solenoid and Valve Control |
Use Scenario: Closed-loop current regulation in HVAC blower motors and seat-position actuators. IC Role / Device Role / Timing Role: 100-V/V gain amplifier interfaced to 12-bit SAR ADC for 0.1-A resolution at 20-A peak. Use Value: Delivers ±0.2% full-scale accuracy across temperature-enabling torque consistency without factory recalibration. |
Use Scenario: Fuel injector driver current profiling during pre-injection, main injection, and post-injection phases. IC Role / Device Role / Timing Role: Fast-settling (9.6 µs to 0.5%) current sensor capturing 10-A flyback transients with <100-ns timing jitter. Use Value: Allows microsecond-level fuel quantity control by resolving 10-mA current steps-critical for Euro 7 emission compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3DQARQ1 | Same 100 V/V gain and specs, but in SOIC-8 (4.90 mm × 3.91 mm) package-1.6× larger footprint and 31.5°C/W higher RθJA than TSSOP. | Better suited for manual rework or high-vibration environments where lead strength matters; less optimal for dense ECU layouts. | Select when board-level reliability testing requires SOIC mechanical robustness over space savings. |
| MAX40056ATA+T | 100 V/V gain, –5 V to 65 V common-mode, 120-dB DC CMRR, 2.5 µV offset-but no AEC-Q100 qualification or functional safety docs. | Limited to industrial or non-safety-critical automotive infotainment subsystems; not approved for powertrain or chassis domains. | Choose only for cost-sensitive prototypes where automotive qualification is deferred to later stages. |
Compared with INA240A3DQARQ1 and MAX40056ATA+T, the INA240A3QPWRQ1 uniquely combines AEC-Q100 Grade 1 qualification, TSSOP-8 thermal efficiency (RθJA = 149.1°C/W), and production-ready functional safety documentation-making it the only drop-in solution for ASIL-B motor control in space-constrained automotive ECUs.
Availability
INA240A3QPWRQ1 is available at Aetrix Electronics and suitable for electronic power steering, stability and traction control, and motor and actuator control applications requiring stable component supply across automotive production lifecycles.
Supply support for INA240A3QPWRQ1 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-grade product development and AEC-Q100 validation expertise.
The INA240-Q1 product line was designed specifically for high-precision, high-reliability current sensing in automotive powertrain and chassis systems-addressing demanding requirements for PWM rejection, wide common-mode operation, and functional safety compliance.
FAQ
What is the maximum common-mode voltage the INA240A3QPWRQ1 can handle?
The INA240A3QPWRQ1 supports a common-mode input voltage range of –4 V to 80 V, independent of supply voltage. This allows operation below ground during inductive flyback events (e.g., solenoid de-energization) and withstands automotive load-dump transients up to 80 V. The specification is guaranteed across the full –40°C to +125°C operating temperature range for the INA240A3QPWRQ1 Grade 1 variant.
Does the INA240A3QPWRQ1 require external calibration for offset drift?
No, the INA240A3QPWRQ1 uses a zero-drift architecture with chopper stabilization, delivering ±25 µV maximum input offset and ±250 nV/°C maximum drift over temperature. This eliminates the need for system-level offset calibration routines or temperature-compensation algorithms in applications like electronic power steering, where consistent accuracy across ambient conditions is mandatory.
Can the INA240A3QPWRQ1 measure bidirectional current without external components?
Yes, the INA240A3QPWRQ1 supports true bidirectional current sensing using its dual reference pins (REF1 and REF2). By setting REF1 = VS and REF2 = GND, the output centers at VS/2, allowing positive and negative differential inputs to produce outputs above and below mid-supply. No external op-amps, level shifters, or resistive dividers are required-simplifying PCB layout and reducing BOM count in motor control designs.
What is the purpose of the NC pin on the INA240A3QPWRQ1 TSSOP package?
Pin 1 in the INA240A3QPWRQ1 TSSOP (PW) package is designated NC (no internal connection). It has no bond wire or silicon connection and must be left floating or tied to GND to minimize parasitic coupling. This pin is reserved for future device variants and is not used in the INA240A3QPWRQ1; incorrect routing to a signal net may introduce noise or crosstalk in high-frequency automotive environments.
How does the enhanced PWM rejection in the INA240A3QPWRQ1 improve motor control accuracy?
The INA240A3QPWRQ1 achieves 93-dB AC CMRR at 50 kHz through proprietary front-end transient suppression, reducing output ripple caused by fast ΔV/Δt common-mode edges in PWM-driven H-bridges. Unlike conventional amplifiers that rely solely on bandwidth extension, this feature ensures clean current waveforms during 20-kHz motor switching-enabling precise torque estimation and eliminating false overcurrent trips in EPS and brake-by-wire systems.
INA240A3QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
INA240A3QPWRQ1 FAQ
1.How can I place an order for INA240A3QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA240A3QPWRQ1 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 INA240A3QPWRQ1 reliable?
The price and inventory of INA240A3QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA240A3QPWRQ1 is usually 5 days.
3.What payment methods are accepted for INA240A3QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA240A3QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA240A3QPWRQ1?
INA240A3QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA240A3QPWRQ1 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 INA240A3QPWRQ1?
For technical support, including INA240A3QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA240A3QPWRQ1 requirements.
6.How does Aetrix verify that INA240A3QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All INA240A3QPWRQ1 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 INA240A3QPWRQ1 meets industry standards.
7.What is the process for return or replacement of INA240A3QPWRQ1?
All INA240A3QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA240A3QPWRQ1, 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 INA240A3QPWRQ1 part is unused and in its original packaging.
Return procedure for INA240A3QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA240A3QPWRQ1 Tags
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