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Product details

Parameters

Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 35, 50, 125 Input offset drift (+/-) (Typ) (uV/C) 0.1 Gain (V/V) 100, 20, 50 Gain error (%) 0.1, 0.15, 0.2 Gain error drift (+/-) (Max) (ppm/°C) 10 CMRR (Min) (dB) 100 Bandwidth (kHz) 550, 500, 450 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.7 Number of channels (#) 1 Comparators (#) 1 Features Alert Function, Low-side Capable Rating Automotive Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Current sense amplifiers analog output

Features

  • 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
  • Wide Common-Mode Input Range: 0 V to 36 V
  • Dual Output: Amplifier and Comparator Output
  • High Accuracy Amplifier:
    • Offset Voltage: 35 µV (Max)
    • Offset Voltage Drift: 0.5 µV/°C (Max)
    • Gain Error: 0.1% (Max)
    • 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
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Description

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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Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
NEW INA381-Q1 ACTIVE AEC-Q100, 26V, 350kHz current sense amplifier with integrated overcurrent comparator The INA381-Q1 has similar functionality with lower perfomance at a lower price
Similar but not functionally equivalent to the compared device:
INA300-Q1 ACTIVE AEC-Q100, 36V current sense comparator The INA300-Q1 offers only an ALERT signal
INA302-Q1 ACTIVE AEC-Q100, 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amp w/ dual comparators The INA302-Q1 has dual integrated comparators
INA303-Q1 ACTIVE AEC-Q100, 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amp w/ window comparator The INA303-Q1 has window comparotor functionality

Technical documentation

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Type Title Date
* Datasheet INA301-Q1 36-V, Automotive, High-Speed, Zero-Drift, Voltage-Output Current-Shunt Monitor With High-Speed, Overcurrent Protection Comparator datasheet (Rev. A) Jun. 08, 2016
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) Feb. 23, 2021
Technical articles How current-sense amplifiers monitor satellite health Feb. 08, 2021
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. D) Dec. 29, 2020
Technical articles Use fast, precise overcurrent detection to enable diagnostics in automotive safety systems Jun. 24, 2019
Application note Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar. 06, 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application note Overcurrent event detection circuit Jul. 31, 2018
Application note Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) Jul. 20, 2018
Application note Measuring Current to Handle Multiple Out-of-Range Conditions (Rev. B) May 18, 2018
Application note Overcurrent and Out-of-Range Protections (Rev. C) May 18, 2018
Selection guide Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep. 05, 2017
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application note Integrating The Current Sensing Signal Path (Rev. A) Dec. 02, 2016
White paper Overcurrent protection enables more efficient and reliable systems May 16, 2016
User guide INA301EVM User Guide Nov. 18, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
75
Description

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

Features
  • Easy access to all device pins
  • All three gains included when the EVM is purchased
  • Visual LED light as indicator of ALERT condition (tripped comparator)
  • Addtitonal terminal block for the convenience of connecting input/output signals

Design tools & simulation

SIMULATION MODEL Download
SBOM959A.TSC (468 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOM960A.ZIP (22 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOMA60.ZIP (71 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBF4.ZIP (27 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBH1.ZIP (28 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBH2.ZIP (28 KB) - PSpice Model
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SIMULATION TOOL Download
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
CALCULATION TOOL Download
SBOR020A.ZIP (525 KB)

Reference designs

REFERENCE DESIGNS Download
Isolated Current Sense Reference Design (±300 A) for Traction Inverter With Overcurrent Detection
TIDA-01543 — This reference design provides detection of traction motor phase currents. The TIDA-01543 design realizes an isolated current sensor solution. Precise in-line  huntbased, motor phase current sensing is done with AMC1305M05-Q1 delta-sigma (ΔΣ) modulators and the INA301-Q1 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Current Shunt Monitor with Transient Robustness Reference Design
TIDA-00302 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 (...)

document-generic Schematic document-generic User guide
Design files

CAD/CAE symbols

Package Pins Download
VSSOP (DGK) 8 View options

Ordering & quality

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  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

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