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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 Catalog 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

  • 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: 20 V/V
    • INA301A2: 50 V/V
    • INA301A3: 100 V/V
  • Programmable Alert Threshold Set Through a Single Resistor
  • Total Alert Response Time: 1 µs
  • Open-Drain Output With Latching Mode
  • Package: VSSOP-8
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Description

The INA301 includes both a high common-mode, current-sensing amplifier and a high-speed comparator configured to detect overcurrent conditions through measuring the voltage developed across a current-sensing or current-shunt resistor and comparing that voltage to a defined threshold limit. The device features an adjustable limit threshold range that is set using a single external limit-setting resistor. This current-shunt monitor can measure 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 (–40°C to +125°C), and is available in an 8-pin VSSOP package.

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Technical documentation

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Type Title Date
* Datasheet INA301 36-V, High-Speed, Zero-Drift, Voltage-Output, Current-Shunt Monitor with High-Speed, Overcurrent Comparator datasheet (Rev. A) Feb. 11, 2016
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application notes Current Sensing Applications in Communication Infrastructure Equipment Sep. 19, 2019
Technical articles Use fast, precise overcurrent detection to enable diagnostics in automotive safety systems Jun. 24, 2019
Application notes Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar. 06, 2019
Application notes External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Application notes Precision current measurements on high-voltage power-supply rails (Rev. C) Feb. 19, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
Application notes Overcurrent event detection circuit Jul. 31, 2018
Application notes Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) Jul. 20, 2018
Application notes Measuring Current to Handle Multiple Out-of-Range Conditions (Rev. B) May 18, 2018
Application notes Overcurrent and Out-of-Range Protections (Rev. C) May 18, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application notes Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout Oct. 27, 2017
Application notes 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 notes Integrating The Current Sensing Signal Path (Rev. A) Dec. 02, 2016
Application notes High-Side Motor Current Monitoring for Over-Current Protection (Rev. A) Dec. 01, 2016
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
White papers Overcurrent protection enables more efficient and reliable systems May 16, 2016
User guides 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 BOARDS 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 MODELS Download
SBOM959A.TSC (468 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOM960A.ZIP (22 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMA60.ZIP (71 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBF4.ZIP (27 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBH1.ZIP (28 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBH2.ZIP (28 KB) - PSpice Model
SIMULATION TOOLS 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 TOOLS 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

Reference designs

REFERENCE DESIGNS Download
High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
TIDA-010065 — This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Battery back-up switch, charger and monitor reference design
PMP22125 — A complete battery back-up, charger and monitoring is implemented with this reference design.  It includes switching between a 12/24-Vdc source and 12/24-V lead acid battery, constant current battery charging at 1A typical, battery maintenance float charge and monitoring circuits for the (...)
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

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