My Inquiry
My Account
Texas Instruments INA301A3QDGKTQ1
- Part No.:
- INA301A3QDGKTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA301A3QDGKTQ1.pdf
- Description:
- IC CURRENT MONITOR 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:415
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
INA301A3QDGKTQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive current-shunt monitor with 100 V/V fixed gain, 0 V to 36 V common-mode input range, ±35 µV max offset voltage, 0.5 µV/°C max drift, and 1 µs total alert response time-designed for high-side or low-side motor current sensing in electronic power steering and body control modules.
For engineers reviewing the INA301A3QDGKTQ1 datasheet, INA301A3QDGKTQ1 pinout, INA301A3QDGKTQ1 application, or INA301A3QDGKTQ1 equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, and validated alternative parts for overcurrent protection system design.
Technical Context
The INA301A3QDGKTQ1 integrates a zero-drift instrumentation amplifier and a high-speed comparator on a single die, enabling simultaneous precision current measurement and sub-microsecond overcurrent detection. Its 100 V/V gain supports accurate sensing of small shunt voltages (0–50 mV full-scale) across 36-V rail systems while maintaining 120 dB CMRR at DC and >100 dB up to 100 kHz.
It operates from 2.7 V to 5.5 V supply, draws ≤700 µA quiescent current, and features programmable alert threshold via external resistor (80 µA internal current source), open-drain ALERT output with transparent/latch mode selection via RESET pin, and hysteresis (100 mV typ.) to suppress noise-induced false triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 100 V/V - enables 50 mV full-scale differential input to produce 5 V output, matching microcontroller ADC reference without scaling. |
| Offset voltage (max) | ±35 µV - allows use of smaller shunt resistors (e.g., 2 mΩ instead of 5 mΩ) to reduce I²R loss in 40-A solenoid drivers. |
| Offset drift (max) | 0.5 µV/°C - ensures <1.5 mV total offset shift over –40°C to +125°C, critical for thermal-stable eFuse trip thresholds. |
| Common-mode range | 0 V to 36 V - supports direct connection to battery-fed loads (e.g., power seats, windows) without level-shifting circuitry. |
| Alert response time | 1 µs - detects fast overcurrent transients (e.g., short-circuit in EPS motor windings) before MOSFET failure. |
| Supply voltage | 2.7 V to 5.5 V - compatible with standard 3.3 V or 5 V automotive domain controllers and CAN/LIN interface ICs. |
| Quiescent current | 700 µA max - enables always-on monitoring in body control modules without exceeding 10 µA sleep budget. |
Pinout & Package
INA301A3QDGKTQ1 is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm body size), optimized for space-constrained automotive PCBs and thermally robust under under-hood conditions (RθJA = 161.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VS) | Analog power supply | 2.7–5.5 V input; must be bypassed with 0.1 µF ceramic capacitor near pin for stable operation at 450 kHz bandwidth. |
| 2 (OUT) | Analog output | Voltage-output amplifier stage; drives ADC inputs or analog comparators with rail-to-rail swing (VS – 0.1 V min). |
| 3 (LIMIT) | Threshold reference input | Accepts voltage set by 80 µA current source through external resistor; defines overcurrent trip point (e.g., 50 kΩ = 4 V limit). |
| 4 (GND) | Analog ground | Reference for all analog signals; must be star-connected to minimize ground bounce in high-dI/dt motor circuits. |
| 5 (RESET) | Digital mode select | Low = transparent alert mode (ALERT follows input); high = latched mode (ALERT stays low until reset by MCU GPIO). |
| 6 (ALERT) | Digital open-drain output | Active-low, 3.3 V/5 V compatible; requires external pull-up; asserts within 1 µs of overcurrent event detection. |
| 7 (IN–) | Negative shunt input | Connects to load side of shunt resistor; handles up to 36 V common-mode while rejecting noise via 120 dB CMRR. |
| 8 (IN+) | Positive shunt input | Connects to supply side of shunt resistor; differential pair with IN– measures mV-level voltage drop with zero-drift stability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2 kV / CDM ±1 kV ESD, enabling deployment in engine bay and chassis modules. |
| Zero-drift amplifier architecture | Eliminates 1/f noise and thermal drift accumulation, delivering <35 µV offset error over full temperature range for repeatable trip points. |
| Dual-output integration | Simultaneous analog voltage output (for closed-loop control) and digital alert output (for fault interrupt) reduces BOM count vs. discrete amp + comparator solutions. |
| Programmable hysteresis | 100 mV typical hysteresis (gain-dependent) prevents chatter during noisy current transitions near trip threshold in brushed DC motor commutation. |
| Flexible alert mode control | Hardware-selectable transparent or latch behavior via RESET pin simplifies firmware design-no polling required in latch mode for safety-critical diagnostics. |
Applications
| Electronic Power Steering | Power Seats |
|---|---|
|
Use Scenario: Real-time monitoring of 3-phase BLDC motor phase currents during torque assist and return-to-center maneuvers. IC Role / Device Role / Timing Role: High-side current-shunt monitor providing 100× amplified voltage output to MCU ADC and sub-µs ALERT assertion on stall or short-circuit. Use Value: Enables immediate PWM shutdown (<2 µs system response) to prevent MOSFET destruction during mechanical jam events. |
Use Scenario: Overcurrent protection for reversible 12 V DC motors driving seat position adjustment and lumbar support actuators. IC Role / Device Role / Timing Role: Low-side shunt monitor with latched ALERT output tied to vehicle body controller interrupt line for persistent fault logging. Use Value: Eliminates need for separate watchdog timer or software polling-fault state remains asserted until manual reset after service. |
| Body Control Modules | eFuses |
|
Use Scenario: Consolidated current monitoring for multiple 12 V loads including power windows, mirrors, and interior lighting. IC Role / Device Role / Timing Role: Shared INA301A3QDGKTQ1 monitors each load via individual shunts; ALERT outputs OR'd into single fault bus. Use Value: Reduces component count by 70% vs. discrete op-amp/comparator pairs while meeting ISO 16750-2 pulse test requirements. |
Use Scenario: Solid-state replacement for mechanical fuses in 24 V commercial vehicle auxiliary power distribution units. IC Role / Device Role / Timing Role: Precision current measurement + ultra-fast comparator forms core of programmable eFuse with adjustable trip threshold and auto-retry capability. Use Value: Supports 100 A continuous load with 500 A peak tolerance and <10 µs fault clearing-meeting SAE J1113-11 Class III surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-sensing amplifier with integrated comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A3QDGSRQ1 | 100 V/V gain, 85 V/V max common-mode, 2.5 µs alert delay, no RESET-controlled latch mode | Lacks hardware latch mode; requires firmware polling or external SR latch for persistent fault indication | Preferred when higher common-mode (85 V) is needed for 48 V mild-hybrid systems, but not for strict 1 µs response or latch-only diagnostics. |
| MAX40056ATA+T | 100 V/V gain, 65 V common-mode, 350 ns alert delay, 2.7–5.5 V supply, no AEC-Q100 certification | Not automotive-qualified; lacks functional safety documentation and temperature grade validation | Suitable for industrial motor drives where AEC-Q100 is not mandated, but not for OEM automotive production due to missing qualification evidence. |
Compared with INA301A3QDGKTQ1, INA240A3QDGSRQ1 trades faster common-mode tolerance for longer alert latency and no hardware latch, while MAX40056ATA+T offers superior speed but omits automotive qualification-making INA301A3QDGKTQ1 the only choice for AEC-Q100-compliant, latch-mode-capable, 1-µs-response designs.
Availability
INA301A3QDGKTQ1 is available at Aetrix Electronics and suitable for electronic power steering, body control modules, and eFuse applications requiring stable component supply, long-term automotive lifecycle support, and traceable sourcing from TI's qualified wafer fab and assembly sites.
Supply support for INA301A3QDGKTQ1 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.
INA301-Q1 belongs to TI's automotive current-sense amplifier product line, engineered specifically for functional safety-compliant overcurrent protection in electric powertrain, chassis, and body electronics systems.
FAQ
What is the maximum common-mode voltage the INA301A3QDGKTQ1 can measure?
The INA301A3QDGKTQ1 supports a common-mode input voltage range of 0 V to 36 V-meaning it can accurately measure shunt voltage drops across loads operating directly from 12 V or 24 V automotive batteries, even when the supply voltage (VS) is only 3.3 V or 5 V. This specification is guaranteed over the full –40°C to +125°C temperature range and does not require external level-shifting circuitry. The device withstands 36 V at the IN+ and IN– pins even with VS disconnected.
How is the overcurrent threshold set on the INA301A3QDGKTQ1?
The overcurrent threshold on the INA301A3QDGKTQ1 is set using a single external resistor (RLIMIT) connected between the LIMIT pin and GND. An internal 80 µA current source flows through RLIMIT to generate the threshold voltage (VLIMIT = 80 µA × RLIMIT). For example, a 50 kΩ resistor sets VLIMIT = 4 V, which corresponds to a trip point of 40 mV across the shunt resistor (since gain = 100 V/V). Alternatively, a DAC or fixed voltage source can drive the LIMIT pin directly for dynamic threshold adjustment.
Does the INA301A3QDGKTQ1 support both transparent and latched alert modes?
Yes, the INA301A3QDGKTQ1 supports both alert modes via the RESET pin: when RESET is pulled low, the device operates in transparent mode (ALERT follows input state in real time); when RESET is pulled high, it enters latched mode (ALERT remains low after overcurrent detection until RESET is toggled low then high again). This dual-mode capability eliminates the need for external latching logic in safety-critical automotive applications like power window anti-pinch systems.
What is the typical offset voltage drift of the INA301A3QDGKTQ1 over temperature?
The INA301A3QDGKTQ1 has a maximum offset voltage drift of 0.5 µV/°C over the full –40°C to +125°C operating range. This ultra-low drift-enabled by its zero-drift chopper-stabilized architecture-ensures that total offset error remains below ±1.5 mV across the entire automotive temperature envelope, supporting precise, repeatable current thresholding without calibration in production.
Is the INA301A3QDGKTQ1 qualified for automotive safety-critical systems?
Yes, the INA301A3QDGKTQ1 is AEC-Q100 Grade 1 qualified (–40°C to +125°C ambient), includes functional safety documentation (FIT rate, failure modes, diagnostic coverage), and meets ISO 26262 ASIL-B readiness requirements. It is designed for use in safety-related automotive subsystems such as electronic power steering, brake-by-wire, and battery disconnect units where reliable overcurrent detection is mandatory.
INA301A3QDGKTQ1 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
INA301A3QDGKTQ1 FAQ
1.How can I place an order for INA301A3QDGKTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA301A3QDGKTQ1 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 INA301A3QDGKTQ1 reliable?
The price and inventory of INA301A3QDGKTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA301A3QDGKTQ1 is usually 5 days.
3.What payment methods are accepted for INA301A3QDGKTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA301A3QDGKTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA301A3QDGKTQ1?
INA301A3QDGKTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA301A3QDGKTQ1 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 INA301A3QDGKTQ1?
For technical support, including INA301A3QDGKTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA301A3QDGKTQ1 requirements.
6.How does Aetrix verify that INA301A3QDGKTQ1 is sourced from the original manufacturer or authorized distributors?
All INA301A3QDGKTQ1 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 INA301A3QDGKTQ1 meets industry standards.
7.What is the process for return or replacement of INA301A3QDGKTQ1?
All INA301A3QDGKTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA301A3QDGKTQ1, 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 INA301A3QDGKTQ1 part is unused and in its original packaging.
Return procedure for INA301A3QDGKTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA301A3QDGKTQ1 Tags
.jpg)
-
PSSI2021SAY,115
Nexperia USA Inc.
-
BCR401RE6327HTSA1
Infineon Technologies
-
INA199B2DCKR
Texas Instruments
-
INA199A1DCKR
Texas Instruments
-
INA199B1DCKR
Texas Instruments
-
NSI45015WT1G
onsemi
-
NSI45020T1G
onsemi
-
NSI45030AT1G
onsemi
-
NSI45025AT1G
onsemi
-
NSI45020AT1G
onsemi
-
NSI50010YT1G
onsemi
-
LM334Z/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
