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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

Texas Instruments INA310A4QDGKRQ1

Name: INA310A4QDGKRQ1
Brand: Texas Instruments
SKU: INA310A4QDGKRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: INA310A4QDGKRQ1

Manufacturer:: Texas Instruments

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)

Datasheet:: INA310A4QDGKRQ1.pdf

Description:: AEC-Q100-4-V TO 110-V1.3-MHZ ULT

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Product details

Overview

INA310A4QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) ultra-precise current sense amplifier with integrated open-drain comparator and 0.6 V internal reference, designed for high-side or low-side shunt monitoring in automotive power systems. It delivers 200 V/V fixed gain, ±5 µV max offset voltage (RTI), 160 dB CMRR, and operates across −4 V to +110 V common-mode range with 2.7 V to 20 V supply - enabling accurate, high-speed overcurrent detection in eTurbo and EPS systems.

For engineers reviewing the INA310A4QDGKRQ1 datasheet, INA310A4QDGKRQ1 pinout, INA310A4QDGKRQ1 application, or INA310A4QDGKRQ1 equivalent, key selection criteria include its 900 kHz small-signal bandwidth at 200× gain, 1 µs comparator propagation delay, latching/transparent mode via RESET pin, and VSSOP-8 package compatibility with space-constrained automotive PCB layouts.

Technical Context

The INA310A4QDGKRQ1 uses a zero-drift precision amplifier topology with matched internal resistors to achieve 0.15% max gain error and ±0.25 µV/°C offset drift across −40°C to +125°C. Its input stage supports common-mode voltages independent of supply rail - enabling direct connection to 48 V, 60 V, or 110 V bus nodes without level-shifting.

Integrated comparator features 8 mV hysteresis, 0.6 V reference, and RESET-controlled latching behavior: grounded or floating RESET enables transparent operation; pulled high enables latch-on-trip with manual or system-initiated reset. Propagation delay remains ≤1 µs under 20 mV overdrive, supporting fast fault response in regenerative braking and starter/generator control loops.

Key Specifications

Parameter	Value and Actual Design Meaning
Gain	200 V/V - fixed internal ratio; eliminates external gain-setting components and ensures stable, temperature-invariant scaling for shunt-based current measurement.
Offset Voltage (max)	±30 µV RTI - enables accurate sensing down to ~150 µV differential input (at 200× gain), critical for low-resistance shunts in high-current EPS motor drives.
CMRR (min)	140 dB - rejects >100 dB of common-mode noise from noisy 48 V/60 V battery rails, preserving signal integrity in electric power steering ECU designs.
Bandwidth	900 kHz - supports detection of fast transients (e.g., short-circuit events in eTurbo inverters) with <1 µs rise time and minimal phase lag.
Comparator Threshold	0.6 V ±20 mV - precise internal reference allows accurate trip-point setting via external resistor divider; hysteresis prevents chatter during marginal overcurrent conditions.
Supply Range	2.7 V to 20 V - compatible with 3.3 V, 5 V, and 12 V automotive subsystem rails while maintaining full −4 V to +110 V common-mode operation.
Quiescent Current	2.25 mA max - enables always-on current monitoring in safety-critical brake system controllers without excessive thermal load.

Pinout & Package

VSSOP-8 package (3.00 mm × 4.90 mm), thermally enhanced for automotive under-hood environments; pin-compatible with other INA310x-Q1 variants.

Pin/Terminal	Circuit Role	Design Meaning
VS (Pin 1)	Power supply input	Accepts 2.7–20 V; powers both amplifier and comparator; independent of common-mode input range.
IN+ (Pin 2)	Positive shunt sense input	Connects to bus-voltage side in high-side sensing; load side in low-side sensing; withstands −20 V to +120 V survival voltage.
IN− (Pin 3)	Negative shunt sense input	Connects to load side in high-side sensing; ground side in low-side sensing; differential input handles up to ±12 V.
GND (Pin 4)	Analog ground reference	Return path for amplifier output and comparator circuitry; must be tied to system power ground with low-impedance connection.
RESET (Pin 5)	Comparator mode control	Active-low logic: grounded or floating = transparent mode; pulled high = latching mode; internal 2 MΩ pulldown ensures safe default state.
CMPOUT (Pin 6)	Open-drain comparator output	Sinks current to GND when triggered; requires external pull-up (e.g., to VS or 3.3 V); supports mixed-voltage interfacing up to 20 V.
OUT (Pin 7)	Amplifier output	Provides 200× amplified V_SENSE; swing to GND ≥5 mV, swing to VS ≤150 mV; drives external ADC or comparator input divider.
CMPIN (Pin 8)	Comparator analog input	Accepts 0–5.5 V (or VS if lower); receives divided-down OUT signal; bias current <20 nA near 0.6 V threshold ensures accurate trip-point setting.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for −40°C to +125°C ambient operation - meets automotive powertrain and chassis module reliability requirements.
Integrated 0.6 V reference + comparator	Eliminates external reference IC and comparator; reduces BOM count and layout area while guaranteeing matched temperature drift between reference and comparator.
Latching/transparent comparator mode	Single-pin RESET control enables flexible fault handling: latched alerts persist until system reset; transparent mode provides real-time status for closed-loop current regulation.
Zero-drift architecture	Ensures <±0.25 µV/°C offset drift and <10 ppm/°C gain drift - maintains accuracy across wide temperature swings in engine bay or traction inverter locations.
Low input bias current (20 µA)	Remains flat across −20 V to +120 V common-mode range - avoids measurement errors in high-impedance shunt networks used in 48 V mild-hybrid systems.

Applications

eTurbo / Electric Turbocharger	Electric Power Steering (EPS)
Use Scenario: Real-time motor phase current monitoring during rapid torque transients in 48 V eTurbo actuators. IC Role / Device Role / Timing Role: High-side current sense amplifier with 900 kHz bandwidth and 1 µs comparator response, feeding fault signals to MCU within <2 µs of overcurrent event. Use Value: Enables sub-10 µs total fault detection latency, preventing IGBT desaturation and ensuring ASIL-B compliant torque limiting.	Use Scenario: Bidirectional motor current sensing in column-assist EPS systems with 12 V or 48 V supply. IC Role / Device Role / Timing Role: Low-offset (±30 µV), high-CMRR (140 dB) amplifier measuring ±200 A through 500 µΩ shunt, with latched comparator alerting MCU on stall condition. Use Value: Delivers <0.5% full-scale current accuracy across −40°C to +125°C, meeting ISO 26262 functional safety requirements for steering assist integrity.
Starter/Generator (Belt-Driven or P0/P1)	Regenerative Braking Control
Use Scenario: Monitoring bidirectional battery current during engine start-stop and generator charging cycles in 12 V/48 V dual-battery architectures. IC Role / Device Role / Timing Role: Wide common-mode (−4 V to +110 V) amplifier operating directly on battery rail; 200× gain scales 10 mV shunt drop to 2 V output for 12-bit ADC. Use Value: Eliminates need for isolated amplifiers or level shifters, reducing cost and board space while maintaining ±0.15% gain accuracy over lifetime.	Use Scenario: Detecting overcurrent faults during high-power regen events in 400 V EV traction inverters with auxiliary 12 V control domain. IC Role / Device Role / Timing Role: Comparator with 0.6 V reference and 1 µs propagation delay triggers hardware shutdown before IGBT short-circuit energy exceeds SOA limits. Use Value: Provides deterministic, analog-fast fault path independent of software execution - critical for achieving ASIL-D fault reaction time targets.

eTurbo / Electric Turbocharger

Electric Power Steering (EPS)

Use Scenario: Real-time motor phase current monitoring during rapid torque transients in 48 V eTurbo actuators.

IC Role / Device Role / Timing Role: High-side current sense amplifier with 900 kHz bandwidth and 1 µs comparator response, feeding fault signals to MCU within <2 µs of overcurrent event.

Use Value: Enables sub-10 µs total fault detection latency, preventing IGBT desaturation and ensuring ASIL-B compliant torque limiting.

Use Scenario: Bidirectional motor current sensing in column-assist EPS systems with 12 V or 48 V supply.

IC Role / Device Role / Timing Role: Low-offset (±30 µV), high-CMRR (140 dB) amplifier measuring ±200 A through 500 µΩ shunt, with latched comparator alerting MCU on stall condition.

Use Value: Delivers <0.5% full-scale current accuracy across −40°C to +125°C, meeting ISO 26262 functional safety requirements for steering assist integrity.

Starter/Generator (Belt-Driven or P0/P1)

Regenerative Braking Control

Use Scenario: Monitoring bidirectional battery current during engine start-stop and generator charging cycles in 12 V/48 V dual-battery architectures.

IC Role / Device Role / Timing Role: Wide common-mode (−4 V to +110 V) amplifier operating directly on battery rail; 200× gain scales 10 mV shunt drop to 2 V output for 12-bit ADC.

Use Value: Eliminates need for isolated amplifiers or level shifters, reducing cost and board space while maintaining ±0.15% gain accuracy over lifetime.

Use Scenario: Detecting overcurrent faults during high-power regen events in 400 V EV traction inverters with auxiliary 12 V control domain.

IC Role / Device Role / Timing Role: Comparator with 0.6 V reference and 1 µs propagation delay triggers hardware shutdown before IGBT short-circuit energy exceeds SOA limits.

Use Value: Provides deterministic, analog-fast fault path independent of software execution - critical for achieving ASIL-D fault reaction time targets.

Equivalent & Alternatives

The following parts are listed as comparable options for similar current sense amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
INA240A4QDRQ1	200 V/V gain, but ±120 µV max offset (vs. ±30 µV), 400 kHz bandwidth (vs. 900 kHz), no integrated comparator or reference.	Suitable for non-safety-critical current monitoring where comparator functionality is implemented externally; lower precision acceptable.	Select INA240A4QDRQ1 only if system already includes discrete comparator and reference, and 900 kHz bandwidth is not required.
MAX40056ATA+T	200 V/V gain, ±50 µV max offset, 1 MHz bandwidth, but no integrated comparator; requires external 0.6 V reference and comparator.	Used in industrial motor drives where AEC-Q100 is not mandated; lacks latching mode and RESET control.	Choose MAX40056ATA+T only for non-automotive applications needing higher bandwidth than INA310A4QDGKRQ1 but no integrated fault logic.

Compared with INA240A4QDRQ1 and MAX40056ATA+T, the INA310A4QDGKRQ1 uniquely integrates comparator + 0.6 V reference + latching mode in a single AEC-Q100 qualified device - reducing component count, PCB area, and fault-path latency in automotive power modules.

Availability

INA310A4QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering (EPS), eTurbo actuation, and regenerative braking control requiring stable component supply across automotive production lifecycles.

Supply support for INA310A4QDGKRQ1 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 INA310x-Q1 product line was engineered specifically for high-reliability automotive current sensing - combining precision amplification, fast fault detection, and AEC-Q100 compliance to replace discrete solutions in EPS, battery management, and 48 V mild-hybrid systems.

FAQ

What is the maximum common-mode voltage the INA310A4QDGKRQ1 can withstand during normal operation?

The INA310A4QDGKRQ1 supports a common-mode input range of −4 V to +110 V under recommended operating conditions. This allows direct connection to high-voltage battery rails (e.g., 48 V, 60 V, or 110 V) without external level-shifting circuitry. The device also survives −20 V to +120 V in non-operational states, providing robustness against load-dump or reverse-battery transients commonly encountered in automotive environments. This specification applies directly to the INA310A4QDGKRQ1 and is validated per AEC-Q100 stress testing protocols.

How does the RESET pin affect comparator behavior in the INA310A4QDGKRQ1?

The RESET pin on the INA310A4QDGKRQ1 controls comparator mode: when left open or pulled to GND, the comparator operates in transparent mode - CMPOUT follows CMPIN in real time. When pulled high (≥1.2 V), it enters latching mode - CMPOUT stays high after first trip until RESET is returned low. This behavior is intrinsic to the INA310A4QDGKRQ1's internal logic and enables flexible fault-handling strategies, such as persistent alert signaling for diagnostic logging or immediate hardware shutdown in safety-critical EPS systems.

What is the typical propagation delay of the comparator in the INA310A4QDGKRQ1, and under what conditions is it measured?

The INA310A4QDGKRQ1 comparator exhibits a typical small-signal propagation delay of 1 µs when the input overdrive is 20 mV. This value is measured from the moment CMPIN crosses the 0.6 V threshold to the CMPOUT transition, with RPULLUP = 5.1 kΩ to VS. Delay remains ≤1.6 µs even under slew-rate-limited conditions (e.g., 0.5 V to 4.5 V output step). This performance is guaranteed across −40°C to +125°C and is a key differentiator of the INA310A4QDGKRQ1 in fast overcurrent protection applications like regenerative braking control.

Can the INA310A4QDGKRQ1 be used for low-side current sensing, and how does its performance compare to high-side use?

Yes, the INA310A4QDGKRQ1 supports both high-side and low-side current sensing configurations. IN+ and IN− are fully symmetrical in function: for low-side use, IN− connects to system ground and IN+ to the shunt's load side. Performance metrics - including ±30 µV offset, 140 dB CMRR, and 900 kHz bandwidth - are identical in both configurations. The device's rail-to-rail input capability and independence from supply voltage ensure consistent accuracy whether measuring current on a 12 V battery ground path or a 48 V bus node - a verified capability of the INA310A4QDGKRQ1 per TI SBOSAD3 characterization data.

What is the maximum capacitive load the INA310A4QDGKRQ1 output can drive without instability?

The INA310A4QDGKRQ1 output is specified to drive up to 500 pF without sustained oscillation or isolation resistor requirement. This value is confirmed in Section 6.5 of the official datasheet (SBOSAD3) under "Maximum capacitive load." Driving loads beyond 500 pF may degrade settling time or cause peaking; for ADC interfaces with larger input capacitance, a series resistor (e.g., 10–50 Ω) is recommended. This 500 pF limit applies specifically to the INA310A4QDGKRQ1 and is validated across temperature and supply voltage ranges.

INA310A4QDGKRQ1 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

Amplifier Type:: Current Sense

Number of Circuits:: 1

Output Type:: Single-Ended

Slew Rate:: 2.5V/µs

Gain Bandwidth Product:: -

-3db Bandwidth:: 900 kHz

Current - Input Bias:: 20 µA

Voltage - Input Offset:: 5 µV

Current - Supply:: 1.6mA

Current - Output / Channel:: -

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 20 V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: 8-VSSOP

INA310A4QDGKRQ1 FAQ

1.How can I place an order for INA310A4QDGKRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for INA310A4QDGKRQ1 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 INA310A4QDGKRQ1 reliable?

The price and inventory of INA310A4QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA310A4QDGKRQ1 is usually 5 days.

3.What payment methods are accepted for INA310A4QDGKRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA310A4QDGKRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for INA310A4QDGKRQ1?

INA310A4QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your INA310A4QDGKRQ1 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 INA310A4QDGKRQ1?

For technical support, including INA310A4QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA310A4QDGKRQ1 requirements.

6.How does Aetrix verify that INA310A4QDGKRQ1 is sourced from the original manufacturer or authorized distributors?

All INA310A4QDGKRQ1 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 INA310A4QDGKRQ1 meets industry standards.

7.What is the process for return or replacement of INA310A4QDGKRQ1?

All INA310A4QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA310A4QDGKRQ1, 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 INA310A4QDGKRQ1 part is unused and in its original packaging.

Return procedure for INA310A4QDGKRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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