Top

Product details

Parameters

Common mode voltage (Max) (V) 36 Common mode voltage (Min) (V) 0 Input offset (+/-) (Max) (uV) 30, 50, 80 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) 1.1 Number of channels (#) 1 Comparators (#) 2 Features Alert Function, Bi-directional, 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

TSSOP (PW) 14 32 mm² 5 x 6.4 open-in-new Find other Current sense amplifiers analog output

Features

  • 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

All trademarks are the property of their respective owners.

open-in-new Find other Current sense amplifiers analog output

Description

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.

open-in-new Find other Current sense amplifiers analog output
Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 19
Type Title Date
* Datasheet INA30x 36-V, Overcurrent Protection, Precision, Current-Sense Amplifiers With Dual Integrated Comparators datasheet (Rev. C) Mar. 26, 2019
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
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
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
User guides INA302 and INA303 Evaluation Modules Jan. 27, 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
Technical articles How to get started with current sense amplifiers – part 2 May 26, 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
$49.00
Description
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 (...)
Features
  • Small form factor
  • Features all 3 gain variants of the INA303 (20V/V, 50V/V and 100V/V)
  • LED indicators to conveniently monitor comparator output signals

Design tools & simulation

SIMULATION MODELS Download
SBOMAB9.TSC (320 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMAC0.ZIP (29 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMB40.ZIP (63 KB) - PSpice Model
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
Current Sensing with <1-us Settling for 1-, 2- & 3-Shunt FOC in 3-Phase Inverter Reference Design
TIDA-00778 — 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 shunt (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
TSSOP (PW) 14 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

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. ​​​​​​​​​​​​​​

Videos

Related videos