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Texas Instruments INA301A3QDGKRQ1
- Part No.:
- INA301A3QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA301A3QDGKRQ1.pdf
- Description:
- IC CURRENT MONITOR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,217
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Product details
Overview
INA301A3QDGKRQ1 from Texas Instruments is an automotive-grade, zero-drift current-shunt monitor IC with 100 V/V fixed gain, 0 V to 36 V common-mode input range, ±35 µV max offset voltage, and 1 µs total alert response time. It integrates a precision amplifier and high-speed comparator for overcurrent protection in 12 V/24 V vehicle power systems.
For engineers reviewing the INA301A3QDGKRQ1 datasheet, INA301A3QDGKRQ1 pinout, INA301A3QDGKRQ1 application, or INA301A3QDGKRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), open-drain ALERT output with transparent/latch mode control via RESET pin, and resistor-programmable overcurrent threshold using an internal 80 µA current source.
Technical Context
The INA301A3QDGKRQ1 employs a zero-drift chopper-stabilized architecture enabling ultra-low offset drift (0.5 µV/°C) and high CMRR (110–120 dB) across –40°C to +125°C. Its dual-output structure delivers amplified voltage (OUT) and digital alert (ALERT) simultaneously from a single 2.7–5.5 V supply.
It operates in both high-side and low-side shunt configurations, accepts common-mode voltages up to 36 V independent of supply, and uses an internal 80 µA current source at the LIMIT pin to set overcurrent thresholds via external resistor-enabling precise trip-point programming without DACs or additional references.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - sets 50 mV full-scale differential input range for 5 V output swing; enables use of smaller shunt resistors (e.g., 1 mΩ at 50 A) |
| Offset voltage (max) | ±35 µV - ensures <0.35% error at 10 mV sense voltage; supports high-accuracy current measurement without calibration |
| Common-mode range | 0 V to 36 V - allows direct monitoring of 12 V/24 V battery rails and load switches without level-shifting circuitry |
| Alert response time | 1 µs - enables detection and shutdown before destructive energy accumulates in solenoids or motor windings |
| Supply voltage | 2.7 V to 5.5 V - compatible with standard 3.3 V or 5 V microcontroller I/O domains and logic supplies |
| Quiescent current | 700 µA max - supports always-on monitoring in body control modules with minimal battery drain |
| CMRR (min) | 110 dB - rejects noise from high-dV/dt switching loads (e.g., PWM-driven motors) while measuring small mV-level shunt signals |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm body size), thermally enhanced for automotive under-hood operation; exposed pad not electrically connected per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Analog power supply | 2.7–5.5 V supply input; decoupling capacitor required at pin for stability |
| 2 (OUT) | Analog output | Voltage output = 100 × (IN+ − IN−); rail-to-rail swing capability supports direct ADC interfacing |
| 3 (LIMIT) | Analog threshold input | Accepts voltage set by external resistor (80 µA × RLIMIT); defines overcurrent trip point for comparator |
| 4 (GND) | Analog ground | Reference for all analog circuitry; must be star-connected to minimize ground bounce in noisy environments |
| 5 (RESET) | Digital mode control | Low = transparent alert mode; high = latched alert mode; TTL/CMOS compatible |
| 6 (ALERT) | Digital open-drain output | Active-low, 3.3 V/5 V compatible; requires external pull-up; drives microcontroller interrupt or latch enable |
| 7 (IN−) | Negative shunt input | Connects to load side of shunt resistor; handles up to 36 V common-mode with no damage |
| 8 (IN+) | Positive shunt input | Connects to supply side of shunt resistor; enables high-side sensing without isolation components |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation; meets automotive reliability and ESD requirements (HBM Class 2, CDM Class C6) |
| Zero-drift amplifier topology | 0.5 µV/°C max offset drift ensures stable accuracy over full temperature range without recalibration |
| Programmable overcurrent threshold | Single external resistor sets trip point; eliminates need for precision voltage references or DACs |
| Configurable alert output mode | Transparent or latched behavior selected via RESET pin-supports both real-time interrupt and polled system architectures |
| High-speed comparator | 1 µs propagation delay enables protection of fast-switching loads like eFuses and solenoid drivers |
Applications
| Solenoid Control | Electronic Power Steering |
|---|---|
Use Scenario: Monitoring coil current during actuation of transmission shift solenoids or fuel injectors in engine control units. IC Role / Device Role / Timing Role: High-side current monitor providing real-time feedback and immediate overcurrent shutdown via ALERT signal. Use Value: Prevents coil burnout by detecting short-circuit faults within 1 µs, enabling safe de-energization before thermal damage occurs. | Use Scenario: Measuring motor phase current in 12 V EPS assist systems during steering torque demand transients. IC Role / Device Role / Timing Role: Low-drift shunt monitor feeding both MCU ADC (via OUT) and hardware safety interrupt (via ALERT). Use Value: Enables precise torque estimation and failsafe cut-off without software latency-critical for ASIL-B functional safety compliance. |
| Power Seats | eFuses |
Use Scenario: Detecting stalled-motor conditions in seat position actuators powered from 12 V battery bus. IC Role / Device Role / Timing Role: Current-sense front-end with latched ALERT output tied to seat ECU reset logic. Use Value: Latch mode ensures fault persistence between periodic ECU polling cycles-eliminates missed overcurrent events during sleep/wake transitions. | Use Scenario: Replacing discrete MOSFET + comparator solutions in smart power distribution units for ADAS domain controllers. IC Role / Device Role / Timing Role: Integrated current monitor and fast comparator enabling compact, calibrated eFuse implementation. Use Value: Reduces BOM count by 40% vs. discrete solution while improving trip accuracy (±35 µV offset) and response consistency (1 µs max delay). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-monitoring applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDRQ1 | Higher bandwidth (400 kHz vs. 450 kHz), lower offset (±5 µV), but no integrated comparator or ALERT output | Requires external comparator and logic for overcurrent response; better for precision measurement-only use cases | Select when highest DC accuracy is prioritized over integrated protection functionality |
| MAX40056ATA+T | Wider supply range (2.7–60 V), faster alert (350 ns), but only 50 V/V gain and no AEC-Q100 Grade 1 rating | Not qualified for under-hood automotive use; suitable for industrial 48 V systems requiring sub-microsecond response | Select for non-automotive high-voltage applications where speed outweighs qualification requirements |
Compared with INA240A3QDRQ1 and MAX40056ATA+T, the INA301A3QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, integrated comparator with configurable latching, and 100 V/V gain in a single VSSOP-8 package-making it optimal for space-constrained, safety-critical automotive overcurrent protection where both measurement fidelity and deterministic fault response are required.
Availability
INA301A3QDGKRQ1 is available at Aetrix Electronics and suitable for electronic power steering, solenoid control, power seats, and eFuse applications requiring stable component supply across automotive production lifecycles.
Supply support for INA301A3QDGKRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.
The INA301-Q1 product line delivers integrated current-sensing solutions for automotive safety-critical subsystems-designed specifically to replace discrete amplifier + comparator designs in body electronics, chassis control, and electrified powertrain applications.
FAQ
What is the maximum common-mode voltage the INA301A3QDGKRQ1 can measure?
The INA301A3QDGKRQ1 supports a common-mode input voltage range of 0 V to 36 V, independent of its 2.7–5.5 V supply voltage. This allows direct monitoring of 12 V and 24 V automotive battery rails-even when the device's own supply is absent-without risk of damage. The specification is validated per absolute maximum ratings and operating conditions in the official datasheet SBOS786B.
How is the overcurrent threshold programmed on the INA301A3QDGKRQ1?
The overcurrent threshold on the INA301A3QDGKRQ1 is programmed using an external resistor (RLIMIT) connected between the LIMIT pin and ground. An internal 80 µA current source flows through RLIMIT to generate the threshold voltage (VLIMIT = 80 µA × RLIMIT), which the comparator compares against the amplified shunt voltage at the OUT pin. This method eliminates need for external references or DACs.
Does the INA301A3QDGKRQ1 support both high-side and low-side current sensing?
Yes, the INA301A3QDGKRQ1 supports both high-side and low-side current sensing configurations. Its 0 V to 36 V common-mode input range and rail-to-rail output swing allow connection across shunt resistors placed either between supply and load (high-side) or load and ground (low-side), making it suitable for diverse automotive topologies including solenoid drivers and motor H-bridges.
What is the function of the RESET pin on the INA301A3QDGKRQ1?
The RESET pin on the INA301A3QDGKRQ1 selects the ALERT output behavior: logic low configures transparent mode (ALERT follows input state in real time), while logic high enables latched mode (ALERT remains asserted until manually cleared). This dual-mode capability supports both interrupt-driven and polled system architectures without external latching logic.
Is the INA301A3QDGKRQ1 qualified for automotive applications?
Yes, the INA301A3QDGKRQ1 is AEC-Q100 qualified for automotive applications, meeting Grade 1 requirements (–40°C to +125°C ambient), HBM ESD Class 2 (±2 kV), and CDM ESD Class C6 (±1 kV). It also includes functional safety documentation to support ISO 26262 ASIL development workflows.
INA301A3QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Monitor
- Sensing Method:
- High/Low-Side
- Accuracy:
- -
- Voltage - Input:
- 0V ~ 36V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA301A3QDGKRQ1 FAQ
1.How can I place an order for INA301A3QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA301A3QDGKRQ1 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 INA301A3QDGKRQ1 reliable?
The price and inventory of INA301A3QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA301A3QDGKRQ1 is usually 5 days.
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4.How is shipping managed for INA301A3QDGKRQ1?
INA301A3QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA301A3QDGKRQ1 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 INA301A3QDGKRQ1?
For technical support, including INA301A3QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA301A3QDGKRQ1 requirements.
6.How does Aetrix verify that INA301A3QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA301A3QDGKRQ1 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 INA301A3QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA301A3QDGKRQ1?
All INA301A3QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA301A3QDGKRQ1, 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 INA301A3QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA301A3QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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