Home Amplifiers Current-sense amplifiers Analog current-sense amplifiers
Home
Amplifiers
Current-sense amplifiers
Analog current-sense amplifiers

INA303

ACTIVE

36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ window comparator

Order now
Data sheet

INA303

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) 30, 50, 80 Input offset drift (±) (typ) (µV/°C) 0.02 Features Alert Function, Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 400, 440, 550 Iq (max) (mA) 1.15 Number of channels 1 Comparators (#) 2 Gain error (%) 0.075, 0.1, 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 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) 30, 50, 80 Input offset drift (±) (typ) (µV/°C) 0.02 Features Alert Function, Bidirectional, High precision, Low-side Capable Rating Catalog Voltage gain (V/V) 20, 50, 100 CMRR (min) (dB) 100 Bandwidth (kHz) 400, 440, 550 Iq (max) (mA) 1.15 Number of channels 1 Comparators (#) 2 Gain error (%) 0.075, 0.1, 0.15 Gain error drift (±) (max) (ppm/°C) 10 Slew rate (V/µs) 4 Operating temperature range (°C) -40 to 125
TSSOP (PW) 14 32 mm² (5 mm × 6.4 mm)
  • Wide common-mode input range: –0.1 V to +36 V
  • Dual comparator outputs:
    • INA302: Two independent overlimit alerts
    • INA303: Window comparator
    • Threshold levels set individually
    • Comparator 1 alert response: 1 µs
    • Comparator 2 adjustable delay: 2 µs to 10 s
    • Open-drain outputs with independent latch control modes
  • High accuracy amplifier:
    • Offset voltage: 30 µV (max, A3 version)
    • Offset voltage drift: 0.5 µV/°C (max)
    • Gain error: 0.15% (max, A3 version)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA302A1, INA303A1: 20 V/V
    • INA302A2, INA303A2: 50 V/V
    • INA302A3, INA303A3: 100 V/V
  • Wide common-mode input range: –0.1 V to +36 V
  • Dual comparator outputs:
    • INA302: Two independent overlimit alerts
    • INA303: Window comparator
    • Threshold levels set individually
    • Comparator 1 alert response: 1 µs
    • Comparator 2 adjustable delay: 2 µs to 10 s
    • Open-drain outputs with independent latch control modes
  • High accuracy amplifier:
    • Offset voltage: 30 µV (max, A3 version)
    • Offset voltage drift: 0.5 µV/°C (max)
    • Gain error: 0.15% (max, A3 version)
    • Gain error drift: 10 ppm/°C
  • Available amplifier gains:
    • INA302A1, INA303A1: 20 V/V
    • INA302A2, INA303A2: 50 V/V
    • INA302A3, INA303A3: 100 V/V

The INA302 and INA303 (INA30x) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302 comparators are configured to detect and respond to overcurrent conditions. The INA303 comparators are configured to respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1 V up to +36 V, independent of the supply.

The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state), or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1 µs, and the alert response for comparator 2 is set through an external capacitor ranging from 2 µs to 10 s.

These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The devices are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 14-pin TSSOP package.

The INA302 and INA303 (INA30x) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302 comparators are configured to detect and respond to overcurrent conditions. The INA303 comparators are configured to respond to both overcurrent and undercurrent conditions in a windowed configuration. These devices feature an adjustable limit threshold range for each comparator set using an external limit-setting resistor. These current-shunt monitors can measure differential voltage signals on common-mode voltages that can vary from –0.1 V up to +36 V, independent of the supply.

The open-drain alert outputs can be configured to operate in either a transparent mode (output status follows the input state), or in a latched mode (alert output is cleared when the latch is reset). The alert response time for comparator 1 is under 1 µs, and the alert response for comparator 2 is set through an external capacitor ranging from 2 µs to 10 s.

These devices operate from a single 2.7-V to 5.5-V supply, drawing a maximum supply current of 950 µA. The devices are specified over the extended operating temperature range of –40°C to +125°C, and are available in a 14-pin TSSOP package.
filter Find other Analog current-sense amplifiers
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Similar functionality to the compared device.
INA301 ACTIVE 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator The INA301 has a single ALERT with similar performance
INA302 ACTIVE 36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ dual comparators The INA302 has dual over-current comparators

Technical documentation

No results found. Please clear your search and try again.
View all 16
Top documentation Type Title Format options Date
* Data sheet INA30x 36-V, Overcurrent Protection, Precision, Current-Sense Amplifiers With Dual Integrated Comparators datasheet (Rev. C) PDF | HTML Mar 26, 2019
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
E-book An Engineer's Guide to Current Sensing (Rev. B) Apr 12, 2022
Application brief Measuring Current To Detect Out-of-Range Conditions (Rev. D) PDF | HTML Mar 10, 2022
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
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 note Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout Oct 27, 2017
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

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

Evaluation board

INA303EVM — INA303 High-Speed Precision Current-Sense Amplifier Evaluation Module

The INA303EVM is a compact, easy-to-use platform for evaluating the main features and performance of the INA303 High-Speed Precision Current-Sense Amplifier with Dual Integrated Comparators, across its specified input voltage, common-mode voltage and temperature ranges. The EVM features all 3 gain (...)
User guide: PDF
Supported products & hardware
In stock
Limit:
??asset.out-of-stock-ti_en_US??
Not available
Simulation model

INA303 PSpice Model

SBOMB40.ZIP (63 KB) - PSpice model
Supported products & hardware
Simulation model

INA303 TINA-TI Reference Design (Rev. A)

SBOMAB9A.TSC (306 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

INA303 TINA-TI Spice Model

SBOMAC0.ZIP (29 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

INA303A1 PSpice Model

SBOMBH6.ZIP (33 KB) - PSpice model
Supported products & hardware
Simulation model

INA303A2 PSpice Model

SBOMBH7.ZIP (33 KB) - PSpice model
Supported products & hardware
Simulation model

INA303A3 PSpice Model

SBOMBG0.ZIP (33 KB) - PSpice model
Supported products & hardware
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 (...)

Supported products & hardware
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 (...)
Supported products & hardware
Design tool

CIRCUIT060034 — Overcurrent event detection circuit

This is a unidirectional current sensing solution generally referred to as overcurrent protection (OCP) that can provide an overcurrent alert signal to shut off a system for a threshold current and re-engage the system once the output drops below a desired voltage (Vout_release) lower than the (...)
Supported products & hardware
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 (...)

Supported products & hardware
Reference design

TIDA-00778 — Current Sensing with <1-us Settling for 1-, 2- & 3-Shunt FOC in 3-Phase Inverter Reference Design

The TIDA-00778 reference design demonstrates fast and accurate current sensing for a three-phase motor driven with sensorless field-oriented control (FOC). Drives with lower audible noise require faster andaccurate current sensing. The most common low-cost current-sensing methods use a single (...)
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
TSSOP (PW) 14 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Video series

View all videos

Videos