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INA300-Q1

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AEC-Q100, 36V current sense comparator

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AEC-Q100, 36V current sense comparator

INA300-Q1

ACTIVE
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Product details

Parameters

Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 650 Input offset drift (+/-) (Typ) (uV/C) 0.1 CMRR (Min) (dB) 96 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.135 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 (DGS) 10 9 mm² 3 x 3 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 Range: 0 V to 36 V
  • Selectable Response Times:
    • 10 µs, 50 µs, 100 µs
  • Programmable Threshold:
    • Adjust Using Single Resistor
    • Programmable From 0 mV to 250 mV
  • Accuracy:
    • Offset Voltage: ±500 µV (Maximum)
    • Offset Voltage Drift: 0.5 µV/°C (Maximum)
  • Selectable Hysteresis:
    • 2 mV, 4 mV, 8 mV
  • Active Quiescent Current: 135 µA (Maximum)
  • Selectable Disable Mode
    • Disabled Quiescent Current: 3.5 µA (Maximum)
    • Disabled Input Bias Current: 500 nA (Maximum)
  • Open-Drain Output With Latch Mode Available
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Description

The INA300-Q1 is a high common-mode, current-sensing comparator that detects overcurrent conditions by measuring the voltage developed across a current-sensing or shunt resistor. The device measures this differential voltage signal on common-mode voltages that can vary from 0 V up to 36 V, independent of the supply voltage. The INA300-Q1 device features an adjustable threshold range that is set using a single external limit-setting resistor. A selectable hysteresis feature enables adjustable operation of the comparator to accommodate the wide input signal range of 0 mV to 250 mV.

An open-drain alert output on the device 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 cleared. The device response time setting is selectable, which enables overcurrent alerts to be issued in as fast as 10 µs.

The INA300-Q1 device operates from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 135 µA. The INA300-Q1 device is specified over the extended operating temperature range of –40°C to +125°C, and is available in a VSSOP-10 package.

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Similar but not functionally equivalent to the compared device:
INA301-Q1 ACTIVE AEC-Q100, 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator The INA301-Q1 offers analog out in additon to an ALERT signal with improved performance
NEW INA381-Q1 ACTIVE AEC-Q100, 26V, 350kHz current sense amplifier with integrated overcurrent comparator The INA381-Q1 offers analog out in additon to an ALERT signal

Technical documentation

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Type Title Date
* Datasheet INA300-Q1 Automotive-Grade, Overcurrent-Protection, Current-Sense Comparator datasheet (Rev. A) Oct. 25, 2016
Technical articles How current-sense amplifiers monitor satellite health Feb. 08, 2021
Application note Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar. 06, 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 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
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
White paper Overcurrent protection enables more efficient and reliable systems May 16, 2016

Design & development

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Hardware development

EVALUATION BOARD Download
document-generic User guide
49
Description

The INA300 is a high common-mode, precision, bidirectional, current-sensing comparator that can be configured to detect over current conditions through the voltage developed across a shunt resistor.  Operating from a single power supply from 2.7 V to 5.5 V, the INA300 can be configured to (...)

Features
  • Jumper selectable Enable and disable
  • Jumper selectable Latch mode and transparent mode
  • Jumper selectable Delay (10 μs, 50 μs, and 100 μs)
  • Jumper selectable Hysteresis (2 mV, 5 mV, and 10 mV)
  • Threshold set by a single resistor or an external voltage source
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Design tools & simulation

SIMULATION MODEL Download
SBOM879A.ZIP (9 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOM880A.TSC (1606 KB) - TINA-TI Reference Design
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
  • (...)
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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 (...)
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Reference designs

REFERENCE DESIGNS Download
Automotive Precision eFuse Reference Design
TIDA-00795 — Fuses are used in many products to avoid current surges and the damage that overcurrent may cause. The traditional fuses used in the Automotive space are low in accuracy and response time. The TIDA-00795 Automotive Precision eFuse reference design is a replacement to the traditional fuse offering (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Automotive Windshield Wiper Drive Reference Design
TIDA-01530 — This reference design drives a two-speed front windshield wiper, one or two rear wipers, and the pump, which sprays the front and back windshields in an automobile. In addition to controlling the brushed motors for the wipers and pump, this design includes inputs for wiper parking signals as well as (...)
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
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CAD/CAE symbols

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VSSOP (DGS) 10 View options

Ordering & quality

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  • Ongoing reliability monitoring

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