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INA301-Q1

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AEC-Q100, 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator

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Data sheet

INA301-Q1

ACTIVE
Data sheet Order now

Product details

Product type Analog output with integrated comparator Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 35, 50, 125 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 450, 500, 550 Iq (max) (mA) 0.7 Number of channels 1 Comparators (#) 1 Gain error (%) 0.1, 0.15, 0.2 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
Product type Analog output with integrated comparator Common-mode voltage (max) (V) 36 Common-mode voltage (min) (V) 0 Input offset (±) (max) (µV) 35, 50, 125 Input offset drift (±) (typ) (µV/°C) 0.1 Features Alert Function, High precision, Low-side Capable Rating Automotive Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 450, 500, 550 Iq (max) (mA) 0.7 Number of channels 1 Comparators (#) 1 Gain error (%) 0.1, 0.15, 0.2 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 TI functional safety category Functional Safety-Capable Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: 0 V to 36 V
  • Dual output: amplifier and comparator output
  • High accuracy amplifier:
    • Offset voltage: 35 µV (maximum)
    • Offset voltage drift: 0.5 µV/°C (maximum)
    • Gain error: 0.1% (maximum)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA301A1-Q1: 20 V/V
    • INA301A2-Q1: 50 V/V
    • INA301A3-Q1: 100 V/V
  • Programmable alert threshold set through a single resistor
  • Total alert response time: 1 µs
  • Open-drain output with both transparent and latching modes
  • Package: VSSOP-8
  • Qualified for automotive applications
  • AEC-Q100 qualified with the following results:
    • Device temperature grade 1: –40°C to +125°C ambient operating temperature
    • Device HBM ESD classification level 2
    • Device CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: 0 V to 36 V
  • Dual output: amplifier and comparator output
  • High accuracy amplifier:
    • Offset voltage: 35 µV (maximum)
    • Offset voltage drift: 0.5 µV/°C (maximum)
    • Gain error: 0.1% (maximum)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA301A1-Q1: 20 V/V
    • INA301A2-Q1: 50 V/V
    • INA301A3-Q1: 100 V/V
  • Programmable alert threshold set through a single resistor
  • Total alert response time: 1 µs
  • Open-drain output with both transparent and latching modes
  • Package: VSSOP-8

The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to provide overcurrent protection by measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. This device features an adjustable limit-threshold range that is set using a single external limit-setting resistor. This current-shunt monitor measures differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage.

The open-drain alert output can be configured to operate in either a transparent mode, where the output status follows the input state, or in a latched mode, where the alert output is cleared when the latch is reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.

The INA301-Q1 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to provide overcurrent protection by measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. This device features an adjustable limit-threshold range that is set using a single external limit-setting resistor. This current-shunt monitor measures differential voltage signals on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage.

The open-drain alert output can be configured to operate in either a transparent mode, where the output status follows the input state, or in a latched mode, where the alert output is cleared when the latch is reset. The device alert response time is under 1 µs, allowing for quick detection of overcurrent events.

This device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 700 µA. The device is specified over the extended operating temperature range of –40°C to +125°C, and is available in an 8-pin VSSOP package.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet INA301-Q1 36-V, Automotive, High-Speed, Zero-Drift, Voltage-Output Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator datasheet (Rev. B) PDF | HTML Apr 1, 2022
Application note Using a PCB Copper Trace as a Current Sense Shunt Resistor (Rev. A) PDF | HTML Apr 27, 2026
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML Nov 18, 2024
Application brief Integrating the Current Sensing Resistor (Rev. D) PDF | HTML Apr 7, 2023
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML Oct 17, 2022
Application brief Measuring Current To Detect Out-of-Range Conditions (Rev. D) PDF | HTML Mar 10, 2022
Functional safety information INA301-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA PDF | HTML Oct 11, 2021
Application brief Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) PDF | HTML Oct 4, 2021
Application brief Integrating the Current Sensing Signal Path (Rev. B) PDF | HTML Sep 29, 2021
Selection guide Current Sense Amplifiers (Rev. E) Sep 20, 2021
Application brief High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) PDF | HTML Feb 23, 2021
Technical article Use fast, precise overcurrent detection to enable diagnostics in automotive safety PDF | HTML Jun 24, 2019
Application brief Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar 6, 2019
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb 19, 2019
Circuit design Overcurrent event detection circuit Jul 31, 2018
Application brief Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep 5, 2017
White paper Overcurrent protection enables more efficient and reliable systems May 16, 2016

Design & development

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Evaluation board

INA301EVM — INA301 Evaluation Module

Three different gain devices in the same EVM package, which enables the custome quickly setup and evaluate any or all the devices as desired.

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Simulation model

INA301 PSpice Model

SBOMA60.ZIP (71 KB) - PSpice model
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Simulation model

INA301 TINA-TI Reference Design (Rev. A)

SBOM959A.TSC (468 KB) - TINA-TI reference design
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Simulation model

INA301 TINA-TI Spice Model (Rev. A)

SBOM960A.ZIP (22 KB) - TINA-TI Spice model
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Simulation model

INA301A1 PSpice Model

SBOMBH1.ZIP (28 KB) - PSpice model
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Simulation model

INA301A2 PSpice Model

SBOMBF4.ZIP (27 KB) - PSpice model
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Simulation model

INA301A3 PSpice Model

SBOMBH2.ZIP (28 KB) - PSpice model
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Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
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Reference design

TIDA-00302 — Current Shunt Monitor with Transient Robustness Reference Design

This high-side current shunt monitor is used to measure the voltage developed across a current-sensing resistor when current passes through it.

Additionally, an external protection circuit is implemented to provide surge and fast-transient protection and demonstrate the different immunity levels to (...)

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Reference design

TIDA-01543 — Isolated Current Sense Reference Design (±300 A) for Traction Inverter With Overcurrent Detection

This reference design provides detection of traction motor phase currents. TIDA-01543 realizes an isolated current sensor. Precise in-line huntbased, motor phase current sensing is done with AMC1305M05-Q1 delta-sigma (ΔΣ) modulators and the INA301-Q1 device. The high CMTI of the (...)
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VSSOP (DGK) 8 Ultra Librarian
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