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Texas Instruments INA240A2QDRQ1
- Part No.:
- INA240A2QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA240A2QDRQ1.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,216
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Product details
Overview
INA240A2QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier with bidirectional sensing capability, 50 V/V fixed gain, –4 V to 80 V wide common-mode input range, ±25 µV max offset voltage, and enhanced PWM rejection for motor/solenoid control systems in electronic power steering and traction control.
For engineers reviewing the INA240A2QDRQ1 datasheet, INA240A2QDRQ1 pinout, INA240A2QDRQ1 application, or INA240A2QDRQ1 equivalent, this page delivers verified specifications, validated pin functions, confirmed automotive-grade thermal and ESD performance, and real-world use context for high-accuracy shunt-based current monitoring under fast ΔV/Δt transients.
Technical Context
The INA240A2QDRQ1 implements a zero-drift, voltage-output architecture optimized for bidirectional current measurement across shunt resistors in high-dV/dt environments. Its enhanced PWM rejection suppresses large common-mode transients without requiring external filtering or bandwidth trade-offs.
It operates from a single 2.7 V to 5.5 V supply, draws ≤2.4 mA quiescent current, and delivers 400 kHz bandwidth with 2 V/µs slew rate. The device supports configurable output midpoint via dual reference pins (REF1/REF2), enabling unidirectional or bidirectional operation within the supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 50 V/V - Fixed precision gain enables accurate 10-mV full-scale current sensing with minimal shunt power loss. |
| Common-Mode Range | –4 V to 80 V - Supports operation below ground (e.g., solenoid flyback) and high-side sensing in 48-V automotive systems. |
| Offset Voltage | ±25 µV max - Enables sub-10-mA current resolution with 100-mΩ shunt at 25°C. |
| DC CMRR | 132 dB - Rejects low-frequency battery ripple and supply noise in EPS and actuator control loops. |
| AC CMRR @ 50 kHz | 93 dB - Maintains accuracy during PWM switching in motor drives with 20-kHz carrier frequencies. |
| Supply Voltage | 2.7 V to 5.5 V - Compatible with standard 3.3-V and 5-V automotive microcontroller domains. |
| Quiescent Current | 2.4 mA max - Enables low-power operation in always-on vehicle subsystems without thermal derating. |
Pinout & Package
INA240A2QDRQ1 is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, rated for –40°C to +125°C ambient operation (Grade 1). Thermal resistance RθJA = 113.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Connects to supply side of shunt resistor; accepts common-mode voltages up to 80 V. |
| IN− | Analog input | Connects to load side of shunt resistor; supports negative common-mode down to –4 V. |
| OUT | Analog output | Voltage output = 50 × (VIN+ − VIN−) + (VREF1 + VREF2)/2; rail-to-rail swing capability. |
| REF1 / REF2 | Analog reference inputs | Set output midpoint voltage; connect to GND/VS or divider to enable bidirectional sensing or level-shifted output. |
| VS | Power supply | Single 2.7–5.5 V supply; powers internal amplifiers and reference circuitry. |
| GND | Analog ground | Reference node for all analog signals; must be low-impedance connection to system ground plane. |
| NC | No internal connection | Pin 4 in SOIC package; must be left floating or tied to GND per layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in safety-critical automotive subsystems including EPS and stability control. |
| Enhanced PWM rejection | Suppresses large ΔV/Δt transients (e.g., MOSFET switching edges) without output ringing or recovery delay-critical for real-time overcurrent protection. |
| Zero-drift architecture | Maintains ±25 µV offset and 250 nV/°C drift across temperature, enabling stable 10-mV full-scale sensing without recalibration. |
| Dual reference inputs (REF1/REF2) | Allow flexible output biasing: unidirectional (0–VS), bidirectional (±VS/2), or custom midpoints-eliminates need for external op-amp level-shifting. |
| High AC CMRR at 50 kHz | 93 dB rejection ensures clean current waveforms in 20-kHz PWM motor drives, reducing software filtering burden and improving ADC effective resolution. |
Applications
| Electronic Power Steering | Stability and Traction Control |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase BLDC motor drivers during assist torque delivery and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier providing isolated, high-bandwidth analog feedback to MCU ADC for field-oriented control (FOC) loop closure. Use Value: ±25 µV offset and 400 kHz bandwidth enable <100-µs overcurrent detection, meeting ISO 26262 ASIL-B timing requirements for torque limiting. |
Use Scenario: Wheel-speed-independent motor current sensing in brake-by-wire actuators during ABS pulse modulation. IC Role / Device Role / Timing Role: High-CMRR current monitor rejecting common-mode noise from solenoid coil switching transients while preserving signal integrity. Use Value: 93 dB AC CMRR at 50 kHz eliminates post-switching recovery artifacts, allowing direct sampling of current during PWM off-time without blanking delays. |
| Motor and Actuator Control | Solenoid and Valve Control |
Use Scenario: Closed-loop current regulation in HVAC blower motors and seat-position actuators using PWM-driven H-bridges. IC Role / Device Role / Timing Role: Precision shunt amplifier interfacing between low-value sense resistor and 12-bit MCU ADC, with output referenced to system ground. Use Value: 50 V/V gain and 132 dB DC CMRR reject battery ripple and shared ground noise, achieving <0.5% total current measurement error across temperature. |
Use Scenario: Monitoring inductive kickback current during fuel injector or transmission solenoid de-energization cycles. IC Role / Device Role / Timing Role: Negative common-mode capable amplifier operating down to –4 V, capturing flyback current without external clamping diodes. Use Value: –4 V to 80 V input range enables direct connection across solenoid terminals, eliminating need for high-voltage level shifters or isolated amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 20 V/V gain, identical package, same offset and CMRR specs | Better suited for higher full-scale shunt voltages (>15 mV); lower gain reduces noise sensitivity but requires larger RSENSE | Select when system design uses ≥15-mV shunt drops and prioritizes lower gain-related errors over power dissipation. |
| INA229AQDGSRQ1 | 20-bit delta-sigma ADC + integrated PGA; I²C output; 160-dB CMRR; 0.1% gain error | Digital output eliminates ADC interface; higher integration but adds firmware dependency and latency | Choose when digital bus interface, higher resolution, or on-chip calibration is required-accepts higher BOM cost and design complexity. |
Compared with INA240A1QDRQ1 and INA229AQDGSRQ1, the INA240A2QDRQ1 offers optimal balance of gain (50 V/V), low-offset precision, and analog simplicity for 10–15 mV shunt applications in space-constrained automotive modules where deterministic latency and minimal external components are critical.
Availability
INA240A2QDRQ1 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, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for INA240A2QDRQ1 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 deep expertise in automotive-grade signal conditioning and power management ICs.
The INA240-Q1 product line was designed specifically for high-reliability current sensing in automotive electrification systems-including EPS, braking, and thermal management-where precision, transient immunity, and functional safety readiness are mandatory.
FAQ
What is the maximum common-mode voltage the INA240A2QDRQ1 can handle?
The INA240A2QDRQ1 supports a common-mode input voltage range of –4 V to 80 V. This allows it to operate in high-side configurations up to 80 V (e.g., 48-V battery systems) and handle negative transients down to –4 V during solenoid flyback events. The specification is guaranteed across the full –40°C to +125°C operating temperature range for the INA240A2QDRQ1 Grade 1 variant.
Does the INA240A2QDRQ1 require external components for basic operation?
No, the INA240A2QDRQ1 operates with no external passive components for core functionality. It only requires decoupling capacitors (0.1 µF ceramic near VS and GND) per TI layout guidelines. The REF1 and REF2 pins may be tied to GND or VS for unidirectional output, or to a resistor divider for bidirectional operation-no op-amps or level shifters are needed.
How does the enhanced PWM rejection in the INA240A2QDRQ1 improve system reliability?
The enhanced PWM rejection in the INA240A2QDRQ1 suppresses large common-mode transients (ΔV/Δt) generated by MOSFET switching in motor drives and solenoid controllers. This prevents output ringing and recovery delays, enabling accurate current measurement during PWM off-times-critical for real-time overcurrent protection and closed-loop FOC without added blanking intervals or digital filtering.
Can the INA240A2QDRQ1 be used for bidirectional current sensing?
Yes, the INA240A2QDRQ1 supports bidirectional current sensing via its dual reference inputs (REF1 and REF2). By setting REF1 = VS and REF2 = GND (or vice versa), the output midpoint shifts to VS/2, allowing positive and negative differential inputs to produce outputs centered at mid-supply-enabling true bidirectional measurement without external circuitry.
What is the guaranteed offset voltage drift over temperature for the INA240A2QDRQ1?
The INA240A2QDRQ1 guarantees a maximum offset voltage drift of ±250 nV/°C over the full –40°C to +125°C operating temperature range. This low drift-combined with ±25 µV max initial offset-ensures stable, high-accuracy current measurements across automotive thermal profiles without periodic recalibration.
INA240A2QDRQ1 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:
- -
- 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-SOIC
INA240A2QDRQ1 FAQ
1.How can I place an order for INA240A2QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA240A2QDRQ1 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 INA240A2QDRQ1 reliable?
The price and inventory of INA240A2QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA240A2QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA240A2QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA240A2QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA240A2QDRQ1?
INA240A2QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA240A2QDRQ1 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 INA240A2QDRQ1?
For technical support, including INA240A2QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA240A2QDRQ1 requirements.
6.How does Aetrix verify that INA240A2QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA240A2QDRQ1 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 INA240A2QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA240A2QDRQ1?
All INA240A2QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA240A2QDRQ1, 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 INA240A2QDRQ1 part is unused and in its original packaging.
Return procedure for INA240A2QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA240A2QDRQ1 Tags
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