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Texas Instruments INA250A4QPWRQ1
- Part No.:
- INA250A4QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
INA250A4QPWRQ1.pdf
- Description:
- IC CURR SENSE 1 CIRCUIT 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
INA250A4QPWRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified, bidirectional precision current sense amplifier with integrated 2-mΩ shunt resistor, 2 V/A gain, ±15 A continuous current capability at –40°C to +85°C, and 108–118 dB common-mode rejection over –40°C to +125°C. It enables high-accuracy battery current monitoring in electric powertrain control modules.
For engineers reviewing the INA250A4QPWRQ1 datasheet, INA250A4QPWRQ1 pinout, INA250A4QPWRQ1 application, or INA250A4QPWRQ1 equivalent, this device delivers system-calibrated current sensing with zero external shunt layout, Kelvin-sense accuracy, and functional safety documentation support for ASIL-B–targeted designs.
Technical Context
The INA250A4QPWRQ1 integrates a 2-mΩ, 0.1% tolerance, 10 ppm/°C (0°C to +125°C) shunt resistor with a zero-drift, 36-V common-mode input amplifier in a single TSSOP-16 package. Its 2 V/A gain provides full-scale output at ±10 A, supporting precise bidirectional measurement via REF pin biasing.
It operates from 2.7 V to 36 V supply, draws ≤300 µA quiescent current, and achieves 11 dB bandwidth (11 kHz) with 0.2 V/µs slew rate. The 4-wire Kelvin connection (SH+, SH–, VIN+, VIN–) eliminates parasitic PCB trace resistance errors, enabling <0.75% total system gain error across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 2 V/A - delivers 2 V output per ampere of sensed current, enabling direct ADC interfacing without scaling resistors |
| Shunt Resistance | 2.000 mΩ ±0.1% - factory-matched to amplifier for system-level calibration; eliminates need for external shunt selection and layout |
| Common-Mode Range | –0.1 V to 36 V - supports high-side sensing on 12 V/24 V/48 V automotive rails, including cold-crank and load-dump conditions |
| CMRR | 108–118 dB (–40°C to +125°C) - rejects noise from switching DC/DC converters and motor drives without additional filtering |
| Max Continuous Current | ±15 A at –40°C to +85°C - sustains full-range operation in body control modules and BMS under ambient thermal stress |
| Supply Voltage | 2.7 V to 36 V - compatible with wide-input automotive power supplies and operates during start-stop battery dips |
| Quiescent Current | 200–300 µA - enables always-on current monitoring in low-power wake-up circuits without significant battery drain |
Pinout & Package
TSSOP-16 package (5.00 mm × 6.40 mm), thermally enhanced for high-current operation; includes dedicated Kelvin sense pins (SH+, SH–) and dual ground pins (GND at Pins 6, 8, 11) for low-noise analog return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+, IN– (Pins 1–3, 14–16) | Analog inputs | High-current path terminals; connect directly to load/supply sides of power rail - carry full sensed current (±15 A) |
| VIN+, VIN– (Pins 12, 5) | Analog inputs | Kelvin voltage sense inputs; connect to SH+ and SH– respectively to eliminate trace IR drop errors |
| SH+, SH– (Pins 13, 4) | Analog outputs | Internal shunt Kelvin sense nodes; must be connected to VIN+ and VIN– for accurate measurement - not for external use |
| OUT (Pin 9) | Analog output | Voltage-output stage with 1.5 Ω impedance; drives 10 kΩ loads with rail-to-rail swing (VS – 0.2 V / GND + 50 mV) |
| REF (Pin 7) | Analog input | Reference bias node (0 V to VS, max 18 V); sets zero-current output level - enables unidirectional (GND tie) or bidirectional (mid-supply bias) operation |
| VS (Pin 10) | Power supply | Single 2.7–36 V supply input; powers amplifier and internal shunt bias circuitry - no separate analog/digital rail required |
| GND (Pins 6, 8, 11) | Analog ground | Three dedicated ground pins minimize ground bounce; require low-inductance star connection to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive ECU thermal requirements without derating |
| Integrated 2-mΩ shunt resistor | 0.1% initial tolerance + 10 ppm/°C drift (0°C to +125°C) - eliminates external shunt calibration and layout sensitivity |
| System gain error ≤0.75% | Includes matched shunt + amplifier error across full temperature range - enables single-point system calibration |
| Functional safety documentation | FMEA reports, FIT data, and safety manual available - accelerates ISO 26262 ASIL-B hardware integration |
| 4-wire Kelvin sensing architecture | Separate force (IN+/IN–) and sense (VIN+/VIN–) paths - removes PCB trace resistance impact on accuracy below 100 µΩ |
Applications
| Body Control Module (BCM) | Battery Management System (BMS) |
|---|---|
Use Scenario: Real-time monitoring of door lock actuator, headlight, and HVAC fan currents for fault detection and energy accounting. IC Role / Device Role / Timing Role: Bidirectional current sensor measuring ±15 A peak loads with 2 V/A output scaling into 12-bit MCU ADC. Use Value: Enables overcurrent shutdown within 100 µs using fast 11 kHz bandwidth, reducing relay wear and improving diagnostic coverage. |
Use Scenario: Cell-level and pack-level current sensing in 48 V mild-hybrid and EV traction battery packs. IC Role / Device Role / Timing Role: High-accuracy shunt-based current monitor with Kelvin sensing, referenced to isolated MCU domain via REF pin. Use Value: Achieves <1% SOC error over lifetime by maintaining <0.75% system gain error across –40°C to +125°C without recalibration. |
| Engine Control Unit (ECU) | DC/DC Converter Monitoring |
Use Scenario: Fuel injector and ignition coil current profiling for misfire detection and adaptive timing control. IC Role / Device Role / Timing Role: Precision current amplifier with 108 dB CMRR rejecting PWM noise from adjacent high-side drivers. Use Value: Supports 100 ns current edge resolution via 0.2 V/µs slew rate, enabling precise pulse-width analysis for closed-loop fuel control. |
Use Scenario: Input/output current sensing in 48 V–12 V bidirectional buck-boost converters for regenerative braking energy recovery. IC Role / Device Role / Timing Role: Dual-channel sensing (using two devices) for input and output rails, sharing REF bias for differential reporting. Use Value: Eliminates external shunt placement errors and thermal gradients - improves efficiency calculation accuracy to ±0.3% across 100 kHz switching noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision current sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Separate amplifier (no integrated shunt); 20 V/V gain; requires external 1-mΩ shunt; 120 dB CMRR | Higher accuracy possible with ultra-low-TCR external shunt, but adds layout complexity and calibration burden | Select when absolute highest accuracy (<0.1%) is required and board space allows discrete shunt placement with 4-wire routing |
| MAX40056ATA+T | Integrated 5-mΩ shunt; 100 mV/A gain; 3.3 V only supply; –40°C to +125°C; no AEC-Q100 grade | Limited to low-voltage, non-automotive applications; lower gain reduces ADC utilization efficiency | Select for cost-sensitive industrial 3.3 V systems where AEC-Q100 compliance is unnecessary and 15 A range is acceptable |
Compared with INA250A4QPWRQ1, INA240A1QDRQ1 offers higher CMRR but demands careful external shunt layout and system calibration, while MAX40056ATA+T lacks automotive qualification and delivers only 100 mV/A output - requiring gain staging for full ADC range use in 12-bit+ systems.
Availability
INA250A4QPWRQ1 is available at Aetrix Electronics and suitable for battery management systems, engine control units, and body control modules requiring stable component supply across automotive production lifecycles.
Supply support for INA250A4QPWRQ1 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 and embedded processing solutions, with deep expertise in precision signal chain and automotive-grade IC design.
The INA250-Q1 product line was developed specifically for AEC-Q100 automotive current sensing, integrating matched shunt and amplifier to eliminate layout-induced errors in high-reliability powertrain and chassis control systems.
FAQ
What is the maximum continuous current rating for INA250A4QPWRQ1 at +125°C ambient?
The INA250A4QPWRQ1 supports ±10 A continuous current at +125°C ambient temperature, as specified in Figure 7-1 of the 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 INA250A4QPWRQ1 be used independently of the amplifier?
No - the integrated 2-mΩ shunt resistor in INA250A4QPWRQ1 is not intended for standalone use. When used without the onboard amplifier, its tolerance degrades to ~5%, and temperature coefficient increases significantly. The device is system-calibrated with the amplifier; using the shunt alone voids all specified accuracy guarantees.
How does the REF pin function in INA250A4QPWRQ1 for bidirectional current sensing?
In INA250A4QPWRQ1, the REF pin sets the zero-current output voltage. For bidirectional operation, apply a mid-supply reference (e.g., 2.5 V on a 5 V system) to REF - positive currents raise OUT above REF, negative currents lower it. This enables full-scale use of ADC range without polarity inversion circuitry.
What is the bandwidth and slew rate of INA250A4QPWRQ1, and how do they affect dynamic response?
The INA250A4QPWRQ1 has a 11 kHz small-signal bandwidth and 0.2 V/µs slew rate. These values support accurate measurement of currents with rise times >30 µs, making it suitable for motor phase current sampling and DC/DC converter output ripple analysis - but not for MHz-class switching node current capture.
Does INA250A4QPWRQ1 include functional safety documentation for ISO 26262 compliance?
Yes - INA250A4QPWRQ1 is functional safety-capable, with TI providing a safety manual, FMEDA report, and FIT data to support ISO 26262 ASIL-B hardware development. Documentation is accessible via TI's product folder and includes guidance for diagnostic coverage implementation in safety-critical BMS and ECU designs.
INA250A4QPWRQ1 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
INA250A4QPWRQ1 FAQ
1.How can I place an order for INA250A4QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA250A4QPWRQ1 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 INA250A4QPWRQ1 reliable?
The price and inventory of INA250A4QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA250A4QPWRQ1 is usually 5 days.
3.What payment methods are accepted for INA250A4QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA250A4QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA250A4QPWRQ1?
INA250A4QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA250A4QPWRQ1 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 INA250A4QPWRQ1?
For technical support, including INA250A4QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA250A4QPWRQ1 requirements.
6.How does Aetrix verify that INA250A4QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All INA250A4QPWRQ1 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 INA250A4QPWRQ1 meets industry standards.
7.What is the process for return or replacement of INA250A4QPWRQ1?
All INA250A4QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA250A4QPWRQ1, 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 INA250A4QPWRQ1 part is unused and in its original packaging.
Return procedure for INA250A4QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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