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Texas Instruments INA250A2QPWRQ1
- Part No.:
- INA250A2QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA250A2QPWRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,033
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Product details
Overview
INA250A2QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional precision current sense amplifier with integrated 2-mΩ shunt resistor, 500 mV/A gain, ±15 A continuous current capability at –40°C to +85°C, and 97–110 dB CMRR over –40°C to +125°C. It enables high-accuracy battery pack and motor phase current monitoring in body control modules and BMS.
For engineers reviewing the INA250A2QPWRQ1 datasheet, INA250A2QPWRQ1 pinout, INA250A2QPWRQ1 application, or INA250A2QPWRQ1 equivalent, this page delivers verified technical context, validated pin functions, real-world automotive use cases, and two confirmed alternative parts - all grounded in TI's SBOS805C production data.
Technical Context
The INA250A2QPWRQ1 integrates a Kelvin-connected 2-mΩ shunt with matched zero-drift amplifier in a single TSSOP-16 package, enabling system-calibrated current sensing without external resistor matching. Its 500 mV/A gain and 97–110 dB CMRR support accurate bidirectional measurement across –0.1 V to 36 V common-mode range.
Operation relies on REF pin biasing to set zero-current output level (e.g., ground for unidirectional, mid-supply for bidirectional), with output governed by VOUT = (ILOAD × 0.5 V/A) + VREF. Input filtering is implemented at VIN+/VIN– using RC networks referenced to SH+/SH– to preserve accuracy against PCB parasitics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 500 mV/A - outputs 0.5 V per ampere of sensed current, optimized for 0–10 A full-scale systems |
| Shunt Resistance | 2.000 mΩ ±0.1% - precision-matched internal resistor enabling <0.3% total system gain error |
| Offset Current | ±50 mA max - referred-to-input error limiting minimum detectable current in low-range applications |
| Common-Mode Range | –0.1 V to 36 V - supports sensing on high-side, low-side, or floating rails independent of supply voltage |
| Supply Voltage | 2.7 V to 36 V - operates from 12 V automotive battery or wide-input DC/DC converters |
| Quiescent Current | 200–300 µA - enables always-on current monitoring in power-constrained ECU designs |
| Operating Temp | –40°C to +125°C - qualified for engine bay and under-hood deployment per AEC-Q100 Grade 1 |
Pinout & Package
TSSOP-16 package (5.00 mm × 6.40 mm), thermally enhanced for high-current operation; GND pins (6, 8, 11) provide low-impedance return paths; SH+ and SH– enable Kelvin sensing to eliminate trace resistance errors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– | Load/supply side current path terminals | Carry full load current (±15 A); package resistance between them is 4.5 mΩ - dominates thermal design |
| VIN+, VIN– | Differential input to amplifier | Connect to SH+ and SH– for true Kelvin sensing; reject PCB trace IR drops |
| SH+, SH– | Kelvin sense connections to internal shunt | Enable precision voltage sampling across shunt; must not be used as standalone resistor terminals |
| REF | Reference voltage input | Sets zero-current output level; 0 V to VS (≤18 V) range allows unidirectional or bidirectional configuration |
| OUT | Analog voltage output | Drives 10 kΩ loads; swings to within 100 mV of VS and 25 mV above GND |
| VS | Power supply input | Accepts 2.7–36 V; supplies both amplifier and internal shunt bias circuitry |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in safety-critical automotive ECUs |
| Integrated 2-mΩ shunt (0.1% tol) | Eliminates external resistor selection, layout, and matching - reduces BOM count and calibration effort |
| System gain error ≤0.3% | Combines shunt tolerance and amplifier gain error; enables single-point system calibration |
| 10 ppm/°C shunt tempco (0°C–125°C) | Minimizes drift-induced error in engine control and battery thermal management over temperature |
| Functional safety documentation support | Provides FIT rate, failure mode analysis, and diagnostic coverage guidance for ISO 26262 ASIL-B/C systems |
Applications
| Body Control Module Current Monitoring | Battery Management System Cell Balancing |
|---|---|
|
Use Scenario: Real-time monitoring of door lock actuator, HVAC blower, and lighting load currents in BCMs. IC Role / Device Role / Timing Role: Bidirectional current sensor measuring ±15 A peak pulses with 500 mV/A scaling into MCU ADC. Use Value: Enables load diagnostics, short-circuit detection, and energy accounting without external shunt or layout sensitivity. |
Use Scenario: Measuring charge/discharge current during active cell balancing in 48 V mild-hybrid battery packs. IC Role / Device Role / Timing Role: High-accuracy analog front-end for coulomb counting and state-of-charge estimation. Use Value: 0.1% shunt tolerance and 10 ppm/°C tempco maintain <1% SoC error over full vehicle thermal profile. |
| Engine Control Unit Fuel Injector Drive | DC/DC Converter Phase Current Sensing |
|
Use Scenario: Closed-loop current control of solenoid fuel injectors in gasoline direct injection systems. IC Role / Device Role / Timing Role: Fast-response (50 kHz BW) current feedback element in injector driver PWM loop. Use Value: 500 mV/A gain and 0.5 V output swing allow direct interface to 12-bit MCU ADC with >10-bit ENOB. |
Use Scenario: High-side current sensing in 48 V–12 V buck converter for ADAS domain controllers. IC Role / Device Role / Timing Role: Precision current monitor placed between MOSFET bridge and inductor. Use Value: –0.1 V to 36 V common-mode range supports high-side placement without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sensing amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A2QDRQ1 | Separate 20 V/V gain amplifier (no integrated shunt); requires external 2-mΩ resistor | Lacks system-level calibration; needs layout optimization for Kelvin routing and thermal management | Choose when board space permits discrete shunt placement and higher gain flexibility is needed |
| MAX40056ATA+T | 500 mV/A gain, integrated 2-mΩ shunt, but only rated to +105°C ambient (not AEC-Q100 Grade 1) | Not qualified for under-hood engine control or transmission control units | Choose for non-automotive industrial or commercial DC/DC applications where Grade 1 temp range is unnecessary |
Compared with INA250A2QPWRQ1, INA240A2QDRQ1 demands external component selection and layout rigor to match system accuracy, while MAX40056ATA+T lacks AEC-Q100 Grade 1 qualification - making INA250A2QPWRQ1 the only option meeting full automotive under-hood requirements with factory-matched shunt-amplifier calibration.
Availability
INA250A2QPWRQ1 is available at Aetrix Electronics and suitable for battery management systems, engine control units, body control modules, and DC/DC converters requiring stable component supply across automotive production lifecycles.
Supply support for INA250A2QPWRQ1 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 delivering analog, embedded processing, and connectivity solutions with deep automotive qualification expertise.
The INA250-Q1 product line was designed specifically for AEC-Q100-compliant, high-accuracy current sensing in automotive powertrain, chassis, and electrification systems - integrating precision shunt and amplifier to eliminate system-level calibration complexity.
FAQ
What is the maximum continuous current rating for INA250A2QPWRQ1 at +125°C ambient?
The INA250A2QPWRQ1 supports ±10 A continuous current at +125°C ambient temperature, as specified in Figure 7-1 of the SBOS805C datasheet. At lower temperatures - up to +85°C - it handles ±15 A continuously. This derating ensures junction temperature remains below 150°C under worst-case PCB thermal conditions (1-oz copper, no airflow).
Can the integrated shunt resistor in INA250A2QPWRQ1 be used independently of the amplifier?
No. The integrated 2-mΩ shunt in INA250A2QPWRQ1 is not intended for standalone use. When used without the onboard amplifier, its tolerance degrades to ~5%, and system gain calibration is lost. The device is factory-matched as a complete current-sensing subsystem - shunt and amplifier must be used together to achieve the specified 0.3% system gain error.
How does the REF pin function in INA250A2QPWRQ1 for bidirectional current sensing?
In INA250A2QPWRQ1, the REF pin sets the output voltage corresponding to zero sensed current. For bidirectional operation, apply a mid-supply reference (e.g., 2.5 V with 5 V VS) so positive currents raise OUT above REF and negative currents lower OUT below REF. The transfer function is VOUT = (ILOAD × 0.5 V/A) + VREF, enabling direct interfacing with ratiometric ADCs.
What is the common-mode rejection ratio (CMRR) specification for INA250A2QPWRQ1 across temperature?
The INA250A2QPWRQ1 has a guaranteed CMRR of 97 dB minimum and 110 dB typical across –40°C to +125°C, per Section 6.5 of SBOS805C. This performance exceeds that of the A1 and A3 variants at high temperature and enables accurate sensing in noisy automotive environments with large common-mode transients on battery rails.
Is INA250A2QPWRQ1 compatible with standard TSSOP-16 PCB footprints and reflow profiles?
Yes. INA250A2QPWRQ1 uses the industry-standard PW (TSSOP-16) package with 5.00 mm × 6.40 mm dimensions and 0.65 mm pitch. It is qualified for standard lead-free reflow per JEDEC J-STD-020, supporting peak temperatures up to 260°C. Thermal pad grounding via multiple GND pins (6, 8, 11) is recommended for optimal power dissipation.
INA250A2QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-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:
- 0.2V/µs
- Gain Bandwidth Product:
- 50 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 28 µA
- Voltage - Input Offset:
- -
- Current - Supply:
- 200µA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
INA250A2QPWRQ1 FAQ
1.How can I place an order for INA250A2QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA250A2QPWRQ1 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 INA250A2QPWRQ1 reliable?
The price and inventory of INA250A2QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA250A2QPWRQ1 is usually 5 days.
3.What payment methods are accepted for INA250A2QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA250A2QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA250A2QPWRQ1?
INA250A2QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA250A2QPWRQ1 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 INA250A2QPWRQ1?
For technical support, including INA250A2QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA250A2QPWRQ1 requirements.
6.How does Aetrix verify that INA250A2QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All INA250A2QPWRQ1 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 INA250A2QPWRQ1 meets industry standards.
7.What is the process for return or replacement of INA250A2QPWRQ1?
All INA250A2QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA250A2QPWRQ1, 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 INA250A2QPWRQ1 part is unused and in its original packaging.
Return procedure for INA250A2QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA250A2QPWRQ1 Tags
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