My Inquiry
My Account
Texas Instruments INA240A3QDRQ1
- Part No.:
- INA240A3QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA240A3QDRQ1.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,866
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA240A3QDRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-sense amplifier with bidirectional sensing, 100 V/V fixed gain, –4 V to 80 V 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 INA240A3QDRQ1 datasheet, INA240A3QDRQ1 pinout, INA240A3QDRQ1 application, or INA240A3QDRQ1 equivalent, this page delivers verified specifications, package mapping, functional context for high-dV/dt environments, and validated alternatives for precision current monitoring in safety-critical automotive subsystems.
Technical Context
The INA240A3QDRQ1 implements a zero-drift, voltage-output current-sense architecture optimized for bidirectional shunt measurements under large common-mode transients. Its enhanced PWM rejection suppresses ΔV/Δt-induced 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 2 V/µs slew rate. The device supports configurable unidirectional or bidirectional output via REF1/REF2 pins, enabling flexible integration into motor gate drivers and solenoid controllers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - enables accurate measurement of low shunt voltages (e.g., 15 mV full-scale at 10 A) while maintaining signal-to-noise ratio |
| Common-Mode Range | –4 V to 80 V - supports operation below ground during flyback periods in solenoid applications |
| Offset Voltage | ±25 µV max - ensures <0.25% error at 10-mV sense voltage, critical for low-current detection |
| DC CMRR | 132 dB - rejects steady-state common-mode errors from battery rail variations or ground shifts |
| AC CMRR @ 50 kHz | 93 dB - maintains accuracy during high-frequency PWM switching in motor drives |
| Supply Voltage | 2.7 V to 5.5 V - compatible with standard automotive 3.3 V and 5 V domains without level-shifting |
| Quiescent Current | 2.4 mA max - enables use in always-on vehicle subsystems without excessive standby power draw |
Pinout & Package
INA240A3QDRQ1 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).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Connects to supply side of shunt resistor; defines high-side current path reference |
| IN– | Analog input | Connects to load side of shunt resistor; differential input pair senses bidirectional current flow |
| GND | Analog ground | Reference node for internal circuitry and output swing; must be low-impedance connection to system ground plane |
| VS | Power supply | Single 2.7–5.5 V supply input; decoupling capacitor required within 1 cm of pin per layout guidelines |
| OUT | Analog output | Voltage-output stage delivering 100×(VIN+ − VIN–) + (VREF1 + VREF2)/2; rail-to-rail capable down to GND + 10 mV |
| REF1, REF2 | Reference inputs | Set output midpoint voltage; connecting both to VS/2 enables bidirectional output centered at mid-supply |
| NC | No internal connection | Pin 4 in SOIC package - must be left floating or tied to GND; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in automotive ECUs, meeting reliability and stress-test requirements for EPS and stability control |
| Enhanced PWM rejection | Suppresses large ΔV/Δt transients (e.g., MOSFET switching edges) before amplification, eliminating post-processing filtering and reducing output recovery time |
| Zero-drift architecture | Maintains ±25 µV offset and 250 nV/°C drift over temperature - enables stable 10-mV full-scale sensing without calibration |
| Bidirectional output configuration | REF1/REF2 pins allow programmable output centering (e.g., 0 V to VS or ±VS/2), supporting both unidirectional motor current and bidirectional battery monitoring |
| High AC CMRR at 50 kHz | 93 dB rejection at typical motor PWM frequencies - preserves signal integrity in noisy inverter environments without external shielding |
Applications
| Electronic Power Steering | Stability and Traction Control |
|---|---|
Use Scenario: Real-time monitoring of three-phase motor phase currents during assist torque generation and regenerative braking. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier providing isolated, high-bandwidth analog feedback to MCU-based motor control loop. Use Value: 100 V/V gain and 400 kHz bandwidth enable fast overcurrent detection (<10 µs response), preventing IGBT damage during fault conditions. |
Use Scenario: Measuring brake caliper solenoid coil current to verify actuation timing and detect open/short faults. IC Role / Device Role / Timing Role: High-CMRR current sensor interfacing directly to solenoid driver IC, rejecting flyback transients during PWM turn-off. Use Value: –4 V common-mode capability accommodates negative flyback voltage, eliminating need for external clamping diodes. |
| Motor and Actuator Control | Solenoid and Valve Control |
Use Scenario: Closed-loop current regulation of HVAC blower motors and seat adjustment actuators in cabin climate and comfort systems. IC Role / Device Role / Timing Role: Precision analog front-end converting shunt voltage to MCU ADC input, with REF1/REF2 configured for unidirectional 0–3.3 V output. Use Value: ±25 µV offset ensures <0.5% error at 250 mA full-scale, enabling accurate torque estimation and energy optimization. |
Use Scenario: Monitoring fuel injector solenoid current waveforms to validate pulse width, peak current, and hold current profiles. IC Role / Device Role / Timing Role: High-speed current amplifier capturing transient behavior during injector opening/closing events. Use Value: Enhanced PWM rejection eliminates ringing on output during 12 V supply collapse, enabling reliable waveform analysis for 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 |
|---|---|---|---|
| INA240A2QDRQ1 | 50 V/V gain, identical package, same offset and CMRR specs | Requires larger shunt resistor (e.g., 30 mΩ vs. 15 mΩ at 10 A) to achieve same output swing | Select when higher full-scale sense voltage is acceptable and lower power dissipation in shunt is not prioritized |
| INA188A3IDR | 100 V/V gain, non-automotive grade, –40°C to +125°C, no AEC-Q100 or enhanced PWM rejection | Lacks automotive qualification and PWM transient suppression; unsuitable for EPS or traction control | Use only in industrial or consumer applications where AEC-Q100 compliance and dV/dt immunity are not required |
Compared with INA240A2QDRQ1 and INA188A3IDR, the INA240A3QDRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 100 V/V precision gain, and validated PWM rejection-making it the only option qualified for safety-critical automotive current sensing where transient immunity and temperature robustness are mandatory.
Availability
INA240A3QDRQ1 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 INA240A3QDRQ1 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-accuracy, high-reliability current sensing in automotive electrification systems-including electric power steering, brake-by-wire, and battery management-where PWM noise immunity and extended temperature operation are essential.
FAQ
What is the maximum common-mode voltage the INA240A3QDRQ1 can handle?
The INA240A3QDRQ1 supports a common-mode input voltage range of –4 V to 80 V. This allows operation below ground during solenoid flyback events and compatibility with 48 V and 12 V automotive battery rails. The specification is guaranteed over the full –40°C to +125°C operating temperature range for the INA240A3QDRQ1 Grade 1 variant.
Does the INA240A3QDRQ1 require external components for basic operation?
The INA240A3QDRQ1 requires only a supply decoupling capacitor (0.1 µF ceramic, placed within 1 cm of the VS pin) and proper PCB layout per TI's guidelines. No external gain-setting resistors or compensation networks are needed-the 100 V/V gain is factory-trimmed and fixed. REF1 and REF2 may be tied to VS/2 for bidirectional output, but no additional passive components are mandatory.
How does the enhanced PWM rejection in the INA240A3QDRQ1 improve system performance?
The enhanced PWM rejection in the INA240A3QDRQ1 reduces output disturbance caused by high dV/dt common-mode transients-such as those from MOSFET switching in motor inverters-by combining high AC CMRR (93 dB at 50 kHz) with internal transient suppression circuitry. This eliminates post-amplifier filtering, shortens fault detection latency, and improves current waveform fidelity without increasing system BOM cost or board area.
Is the INA240A3QDRQ1 pin-compatible with other variants in the INA240-Q1 family?
Yes, all INA240-Q1 variants-including INA240A1QDRQ1, INA240A2QDRQ1, INA240A3QDRQ1, and INA240A4QDRQ1-are pin-compatible in the 8-pin SOIC (D) package. They share identical pinout, footprint, and recommended operating conditions; only the gain differs. This enables design reuse and gain-scaling without PCB revision.
What is the output voltage swing capability of the INA240A3QDRQ1?
The INA240A3QDRQ1 delivers rail-to-rail output swing: down to GND + 10 mV (at –40°C to +125°C) and up to VS – 0.2 V (under 10 kΩ load). At room temperature, output swing extends to GND + 1 mV and VS – 0.05 V. This wide dynamic range maximizes ADC utilization and supports direct interface with 3.3 V or 5 V microcontrollers without level-shifting.
INA240A3QDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA240A3QDRQ1 FAQ
1.How can I place an order for INA240A3QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA240A3QDRQ1 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 INA240A3QDRQ1 reliable?
The price and inventory of INA240A3QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA240A3QDRQ1 is usually 5 days.
3.What payment methods are accepted for INA240A3QDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA240A3QDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA240A3QDRQ1?
INA240A3QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA240A3QDRQ1 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 INA240A3QDRQ1?
For technical support, including INA240A3QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA240A3QDRQ1 requirements.
6.How does Aetrix verify that INA240A3QDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA240A3QDRQ1 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 INA240A3QDRQ1 meets industry standards.
7.What is the process for return or replacement of INA240A3QDRQ1?
All INA240A3QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA240A3QDRQ1, 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 INA240A3QDRQ1 part is unused and in its original packaging.
Return procedure for INA240A3QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA240A3QDRQ1 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
