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Texas Instruments INA301A1QDGKRQ1
- Part No.:
- INA301A1QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA301A1QDGKRQ1.pdf
- Description:
- IC CURRENT MONITOR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,353
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Product details
Overview
INA301A1QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-shunt monitor with integrated high-speed comparator, delivering 20 V/V gain, ±35 µV max offset voltage, and 1 µs total alert response time for overcurrent protection in 12-V to 36-V power rails. It operates from 2.7–5.5 V supply and supports both high-side and low-side sensing in solenoid control and electronic power steering systems.
For engineers reviewing the INA301A1QDGKRQ1 datasheet, INA301A1QDGKRQ1 pinout, INA301A1QDGKRQ1 application, or INA301A1QDGKRQ1 equivalent, this page delivers verified functional safety–capable specifications, VSSOP-8 package layout guidance, exact comparator hysteresis values per variant, and validated alternative parts for automotive eFuse and motor monitoring designs.
Technical Context
The INA301A1QDGKRQ1 integrates a zero-drift, rail-to-rail output amplifier and a dedicated high-speed comparator on a single die. Its 20 V/V fixed gain, 550-kHz bandwidth, and 0.5 µV/°C offset drift enable precise shunt-based current measurement across –40°C to +125°C ambient, while the internal 80-µA LIMIT pin current source enables resistor-programmable overcurrent thresholds without external DACs.
It implements dual alert modes-transparent (RESET = low) and latched (RESET = high)-with 20 mV hysteresis to prevent noise-induced chatter near threshold. The open-drain ALERT output supports pull-up to voltages up to 5.5 V, independent of VS, and tolerates 36-V common-mode input even with VS unpowered.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - sets full-scale output at 250 mV differential input; enables use of low-value shunts (e.g., 10 mΩ) for 20-A trip detection |
| Offset Voltage (max) | ±35 µV - ensures ≤0.7 mV error at 20× gain, critical for <1% current measurement accuracy in body control modules |
| Common-Mode Range | 0 V to 36 V - supports direct sensing on 12-V/24-V/36-V battery rails without level-shifting or isolation |
| Alert Response Time | 1 µs - allows 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 ADC references |
| Quiescent Current | 700 µA max - enables always-on monitoring in low-power ECU sleep modes without excessive battery drain |
| Hysteresis | 20 mV - suppresses false alerts from ripple or noise on shunt voltage in power seat actuator circuits |
Pinout & Package
VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced for automotive under-hood operation; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VS | Analog power supply input | Accepts 2.7–5.5 V; powers both amplifier and comparator; must be bypassed with 0.1-µF ceramic capacitor |
| 2 - OUT | Amplifier voltage output | Rail-to-rail output referenced to GND; drives ADC inputs or analog monitoring circuits directly |
| 3 - LIMIT | Comparator threshold reference input | Internally sourced with 80 µA; sets alert threshold via external resistor (e.g., 50 kΩ for 4-V trip) |
| 4 - GND | Analog ground reference | Single-point connection point for shunt resistor return and bypass capacitor; separates from digital ground |
| 5 - RESET | Digital mode select input | Low = transparent alert mode; high = latched alert mode; CMOS-compatible, no pull required |
| 6 - ALERT | Open-drain comparator output | Active-low, 300 mV max VOL at 3 mA; requires external pull-up; supports wired-OR fault bus architectures |
| 7 - IN− | Negative differential input | Connects to load side of shunt; common-mode tolerant to 36 V regardless of VS presence |
| 8 - IN+ | Positive differential input | Connects to supply side of shunt; enables high-side or low-side configuration without rework |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation in powertrain and chassis ECUs with HBM ±2 kV / CDM ±1 kV ESD robustness |
| Functional Safety documentation support | TI provides FIT rate data, failure mode analysis, and diagnostic coverage reports for ISO 26262 ASIL-B system integration |
| Zero-drift amplifier architecture | 0.5 µV/°C max offset drift ensures stable calibration over full temperature range-no periodic auto-zero required |
| Resistor-programmable overcurrent threshold | Single RLIMIT sets trip point; eliminates need for precision voltage references or DACs in cost-sensitive eFuse designs |
| Dual alert response modes | Transparent mode enables real-time interrupt-driven response; latched mode guarantees fault capture in polled architectures |
Applications
| Electronic Power Steering | Solenoid Control |
|---|---|
|
Use Scenario: Real-time monitoring of 3-phase motor phase currents during assist torque delivery. IC Role / Device Role / Timing Role: High-side current-shunt monitor providing amplified analog feedback to MCU ADC and sub-µs overcurrent alert to gate driver disable logic. Use Value: Enables immediate MOSFET shutdown within 1 µs of short-circuit detection, preventing IGBT destruction during rack-and-pinion lockup events. |
Use Scenario: Monitoring 12-V solenoid coil current during transmission shift actuation. IC Role / Device Role / Timing Role: Low-side shunt monitor with latched ALERT output tied to ECU watchdog timer for fault logging. Use Value: Guarantees detection of open-circuit or stuck-on faults between polling intervals, satisfying ASIL-B diagnostic coverage requirements. |
| Power Seats | Body Control Modules |
|
Use Scenario: Bidirectional current sensing in reversible DC motors driving seat position adjustment. IC Role / Device Role / Timing Role: Dual-polarity capable shunt monitor feeding direction-aware current magnitude to seat ECU for stall detection and soft-stop control. Use Value: Eliminates need for separate high-side/low-side monitors-single device handles forward/reverse motor current with 20-V/V gain symmetry. |
Use Scenario: Consolidated overcurrent protection for multiple 12-V loads (windows, mirrors, lighting) in centralized junction box. IC Role / Device Role / Timing Role: Shared ALERT line with wired-OR topology; each INA301A1QDGKRQ1 asserts fault independently onto common interrupt bus. Use Value: Reduces BOM count vs. discrete comparator solutions; maintains <1-µs response across all protected branches without signal skew. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-shunt monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | 20 V/V gain, 4-µs alert response, 500-kHz BW, 5-µV/°C offset drift | Higher offset drift and slower response limit suitability for fast-acting eFuses or EPS; better for lower-bandwidth HVAC blower control | Select when extended common-mode range (–4 V to 80 V) is required over speed or ultra-low drift |
| MAX40056ATA+T | 20 V/V gain, 350-ns alert response, 1.5-µV/°C drift, 2.7–5.5 V supply | Faster response enables protection in <500-ns fault windows; lacks AEC-Q100 Grade 1 qualification and functional safety documentation | Select only for non-safety-critical industrial motor drives where sub-µs latency outweighs automotive certification needs |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA301A1QDGKRQ1 uniquely balances AEC-Q100 Grade 1 compliance, 1-µs alert timing, and 0.5-µV/°C drift-making it the only option qualified for ASIL-B powertrain overcurrent detection without derating or additional diagnostics.
Availability
INA301A1QDGKRQ1 is available at Aetrix Electronics and suitable for electronic power steering, solenoid control, and body control module designs requiring stable component supply across automotive production lifecycles.
Supply support for INA301A1QDGKRQ1 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 INA301-Q1 product line was designed specifically for automotive overcurrent protection in high-reliability, safety-critical systems-integrating precision amplification and fast comparator functions into a single AEC-Q100 qualified device.
FAQ
What is the maximum common-mode voltage the INA301A1QDGKRQ1 can measure?
The INA301A1QDGKRQ1 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 sensing on 12-V, 24-V, or 36-V automotive battery rails-even when the device's VS pin is unpowered-without damage or measurement error. The specification is validated per AEC-Q100 stress testing and applies across the full –40°C to +125°C operating temperature range.
How is the overcurrent threshold set on the INA301A1QDGKRQ1?
The overcurrent threshold on the INA301A1QDGKRQ1 is set using a single external resistor (RLIMIT) connected between the LIMIT pin and GND. An internal 80-µA current source develops a voltage at LIMIT equal to 80 µA × RLIMIT. When the amplifier output (OUT) exceeds this voltage, the ALERT pin pulls low. For example, a 50-kΩ resistor sets a 4-V threshold, corresponding to a 20-A trip on a 10-mΩ shunt with 20× gain. The INA301A1QDGKRQ1 also accepts an external voltage source on LIMIT for dynamic threshold adjustment.
Does the INA301A1QDGKRQ1 support both high-side and low-side current sensing?
Yes, the INA301A1QDGKRQ1 supports both high-side and low-side current sensing configurations. Its 0–36 V common-mode input range allows IN+ and IN− to be placed across a shunt resistor on either side of the load-whether between battery and load (high-side) or load and ground (low-side). The device maintains specified accuracy and response time in both topologies, and its rail-to-rail OUT pin simplifies interfacing with downstream ADCs or comparators in either configuration.
What is the difference between transparent and latched alert modes on the INA301A1QDGKRQ1?
Transparent mode (RESET = low) causes the ALERT output to follow the input state in real time: it pulls low when overcurrent occurs and returns high immediately when current falls below threshold. Latched mode (RESET = high) holds ALERT low after detection until RESET is pulsed low to clear the latch. This ensures fault capture in systems that poll ALERT infrequently-critical for meeting ASIL-B diagnostic coverage targets in body control modules where the INA301A1QDGKRQ1 is deployed.
Is the INA301A1QDGKRQ1 qualified for functional safety applications?
Yes, the INA301A1QDGKRQ1 is functional safety–capable and supported by Texas Instruments' functional safety documentation package, including FMEDA reports, FIT rate calculations, and diagnostic coverage analysis aligned with ISO 26262. It is AEC-Q100 Grade 1 qualified (–40°C to +125°C), with documented failure modes and mitigation strategies-enabling its use in ASIL-B automotive systems such as electronic power steering and eFuse controllers without additional hardware redundancy.
INA301A1QDGKRQ1 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
INA301A1QDGKRQ1 FAQ
1.How can I place an order for INA301A1QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA301A1QDGKRQ1 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 INA301A1QDGKRQ1 reliable?
The price and inventory of INA301A1QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA301A1QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA301A1QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA301A1QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA301A1QDGKRQ1?
INA301A1QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA301A1QDGKRQ1 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 INA301A1QDGKRQ1?
For technical support, including INA301A1QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA301A1QDGKRQ1 requirements.
6.How does Aetrix verify that INA301A1QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA301A1QDGKRQ1 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 INA301A1QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA301A1QDGKRQ1?
All INA301A1QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA301A1QDGKRQ1, 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 INA301A1QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA301A1QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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