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Texas Instruments INA240A3EDRQ1
- Part No.:
- INA240A3EDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
INA240A3EDRQ1.pdf
- Description:
- IC CURRENT SENSE 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
INA240A3EDRQ1 from Texas Instruments is an AEC-Q100 Grade 0 automotive current-sense amplifier with 100 V/V fixed gain, –4 V to 80 V wide common-mode input range, ±25 µV max input offset voltage, 132 dB DC CMRR, and enhanced PWM rejection for accurate bidirectional current measurement in high-dV/dt environments such as solenoid control and motor drives.
For engineers reviewing the INA240A3EDRQ1 datasheet, INA240A3EDRQ1 pinout, INA240A3EDRQ1 application, or INA240A3EDRQ1 equivalent, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options - all grounded in TI's SBOS808E production data sheet and official device documentation.
Technical Context
The INA240A3EDRQ1 implements a zero-drift, voltage-output current-sense architecture optimized for bidirectional sensing across shunt resistors 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 V to 5.5 V supply, draws ≤2.4 mA quiescent current, and delivers 400 kHz –3-dB bandwidth with 2 V/µs slew rate. The 100 V/V gain version enables full-scale sensing down to 10 mV across the shunt while maintaining <0.20% gain error and ±250 nV/°C offset drift over –40°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - sets output scaling for precise low-voltage shunt sensing (e.g., 15 mV full-scale → 1.5 V output) |
| Common-Mode Range | –4 V to 80 V - supports below-ground operation during flyback and high-side sensing in 48-V/60-V automotive systems |
| Input Offset Voltage | ±25 µV max - enables accurate current measurement with shunts as small as 1.5 mΩ at 10 A full-scale |
| DC CMRR | 132 dB - rejects steady-state noise from battery rails and power domains without calibration |
| AC CMRR @ 50 kHz | 93 dB - maintains signal integrity during PWM switching in motor gate drivers and solenoid controllers |
| Operating Temperature | –40°C to +150°C (Grade 0) - qualified for under-hood automotive locations including EPS and transmission control units |
| Supply Voltage | 2.7 V to 5.5 V - compatible with standard 3.3 V and 5 V microcontroller I/O domains |
Pinout & Package
INA240A3EDRQ1 is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, rated for Grade 0 operation up to +150°C ambient. Pin functions are identical between SOIC and TSSOP variants per TI's official pin mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Analog input | Connects to supply side of shunt; defines high-side current path reference |
| IN− | Analog input | Connects to load side of shunt; differential input pair senses VSENSE = VIN+ − VIN− |
| VS | Power supply | Single 2.7–5.5 V rail; powers internal amplifiers and reference circuitry |
| GND | Analog ground | Return path for supply and signal; must be low-impedance connection to shunt ground |
| OUT | Analog output | Voltage-output stage delivering 100×(VIN+ − VIN−) + (VREF1 + VREF2)/2 |
| REF1, REF2 | Reference inputs | Set output midpoint; configurable for unidirectional (0 V to VS) or bidirectional (VS/2 ± range) operation |
| NC | No internal connection | Pin 4 in SOIC layout - must be left floating or tied to GND; no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C ambient operation in safety-critical automotive subsystems including EPS and traction control |
| Enhanced PWM rejection | Suppresses large common-mode transients (e.g., MOSFET switching edges) before amplification, eliminating post-processing ripple |
| Zero-drift architecture | Maintains ±25 µV max offset and ±250 nV/°C drift - enables stable 10-mV full-scale sensing without periodic recalibration |
| Bidirectional output configuration | REF1/REF2 pins allow flexible output centering (e.g., 2.5 V mid-scale for ±1.5 V swing), supporting both charging and discharging current detection |
| High AC CMRR at 50 kHz | 93 dB attenuation of PWM-edge interference ensures clean current waveforms in 20-kHz motor inverters and solenoid drivers |
Applications
| Electronic Power Steering (EPS) | Stability and Traction Control |
|---|---|
Use Scenario: Real-time phase current monitoring in 3-phase brushless EPS motor drivers during assist and return events. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier measuring low-side shunt voltage with 100 V/V gain and 400 kHz bandwidth. Use Value: Enables fast overcurrent protection (<10 µs response) and torque estimation accuracy within ±0.5% full-scale using 1.5 mΩ shunt and 3.3 V ADC interface. |
Use Scenario: Wheel-speed-independent motor current feedback in ABS hydraulic modulator valve drivers. IC Role / Device Role / Timing Role: High-CMRR current sensor rejecting 60-V flyback transients during solenoid turn-off in 12-V/48-V dual-battery systems. Use Value: Eliminates need for RC snubbers or digital post-filtering, reducing BOM count and enabling direct connection to 12-bit MCU ADCs. |
| Motor and Actuator Control | Solenoid and Valve Control |
Use Scenario: Closed-loop current regulation in HVAC blower actuators and seat-position motors. IC Role / Device Role / Timing Role: Precision analog front-end converting shunt voltage to MCU-readable output with <0.20% gain error over temperature. Use Value: Supports deterministic current control across –40°C to +150°C, meeting ASIL-B diagnostic coverage requirements without software compensation. |
Use Scenario: Fuel injector and transmission shift solenoid current profiling in gasoline and hybrid powertrains. IC Role / Device Role / Timing Role: Wide common-mode (–4 V to 80 V) amplifier capturing both energizing and flyback phases of inductive loads. Use Value: Accurately resolves 10-A peak currents with 10-mV shunt drops, enabling pulse-width-based fuel metering and closed-loop pressure control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A4EDRQ1 | 200 V/V gain (vs. 100 V/V); same package, temp grade, and specs otherwise | Supports lower shunt voltages (e.g., 7.5 mV full-scale) - suited for ultra-low-loss 0.75 mΩ shunts in high-current EPS | Select when full-scale shunt drop must be ≤10 mV and system noise floor permits higher gain sensitivity |
| INA229AQDGSRQ1 | Digital output (I²C), 16-bit resolution, integrated 2048-word FIFO; no internal gain setting - requires external shunt and ADC | Enables time-stamped current logging and burst-mode acquisition; lacks analog real-time output for fast protection loops | Choose for diagnostic data recording and thermal derating analysis - not for hard real-time overcurrent shutdown |
Compared with INA240A4EDRQ1 and INA229AQDGSRQ1, the INA240A3EDRQ1 balances analog speed, precision, and simplicity - delivering deterministic 100× gain with sub-µs transient response and no firmware dependency, making it optimal for safety-critical current limiting where latency and predictability are paramount.
Availability
INA240A3EDRQ1 is available at Aetrix Electronics and suitable for electronic power steering, stability and traction control, and solenoid/valve control applications requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100 Grade 0 compliance.
Supply support for INA240A3EDRQ1 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 IC design expertise and ISO/TS 16949-certified manufacturing.
The INA240-Q1 product line was engineered specifically for high-reliability automotive current sensing - emphasizing enhanced PWM rejection, wide common-mode tolerance, and AEC-Q100 Grade 0 operation to meet EPS, braking, and powertrain subsystem requirements.
FAQ
What is the maximum common-mode voltage the INA240A3EDRQ1 can handle?
The INA240A3EDRQ1 supports a common-mode input voltage range of –4 V to 80 V, as specified in its recommended operating conditions. This allows operation below ground during inductive flyback events and high-side sensing in 48-V automotive architectures. The rating holds across the full –40°C to +150°C Grade 0 temperature range and is validated per TI's SBOS808E datasheet Section 7.3.
Does the INA240A3EDRQ1 require external calibration for offset or gain error?
No, the INA240A3EDRQ1 does not require external calibration. Its zero-drift architecture guarantees ≤±25 µV input offset voltage and ≤±0.20% gain error over temperature, with drift coefficients of ≤±250 nV/°C and ≤±2.5 ppm/°C respectively. These parameters are production-tested and guaranteed - enabling plug-and-play integration into automotive control units without factory trim or runtime compensation.
Can the INA240A3EDRQ1 be used for bidirectional current sensing?
Yes, the INA240A3EDRQ1 supports bidirectional current sensing via its REF1 and REF2 pins. By setting these pins to appropriate reference voltages (e.g., both at VS/2), the output centers at mid-supply, allowing positive and negative differential inputs to produce corresponding above- and below-midpoint outputs. This capability is explicitly documented in TI's SBOS808E Section 8.4 and Figure 8-2.
What is the purpose of the NC pin on the INA240A3EDRQ1 SOIC package?
The NC (No Connection) pin on the INA240A3EDRQ1 SOIC package (Pin 4) has no internal connection and serves only as a mechanical placeholder. Per TI's official pin function table (Section 6.1), it may be left floating or tied to GND - neither choice affects electrical performance. This pin is not present in the TSSOP variant, where Pin 1 is NC instead.
How does enhanced PWM rejection improve performance in motor drive applications?
Enhanced PWM rejection in the INA240A3EDRQ1 actively suppresses large common-mode transients (ΔV/Δt) generated during MOSFET switching, preventing them from coupling into the output as ripple or settling artifacts. Unlike conventional amplifiers that rely solely on bandwidth and external filtering, this feature provides >93 dB AC CMRR at 50 kHz - ensuring clean, distortion-free current waveforms for real-time torque control and overcurrent protection in 20-kHz motor inverters.
INA240A3EDRQ1 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
INA240A3EDRQ1 FAQ
1.How can I place an order for INA240A3EDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA240A3EDRQ1 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 INA240A3EDRQ1 reliable?
The price and inventory of INA240A3EDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA240A3EDRQ1 is usually 5 days.
3.What payment methods are accepted for INA240A3EDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA240A3EDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA240A3EDRQ1?
INA240A3EDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA240A3EDRQ1 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 INA240A3EDRQ1?
For technical support, including INA240A3EDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA240A3EDRQ1 requirements.
6.How does Aetrix verify that INA240A3EDRQ1 is sourced from the original manufacturer or authorized distributors?
All INA240A3EDRQ1 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 INA240A3EDRQ1 meets industry standards.
7.What is the process for return or replacement of INA240A3EDRQ1?
All INA240A3EDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA240A3EDRQ1, 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 INA240A3EDRQ1 part is unused and in its original packaging.
Return procedure for INA240A3EDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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