Product details

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, High precision, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
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, High precision, Low-side Capable Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
TSSOP (PW) 14 32 mm² 5 x 6.4
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ +125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: –0.1 V to +36 V
  • Dual comparator outputs:
    • INA302-Q1: Two independent overlimit alerts
    • INA303-Q1: 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-Q1, INA303A1-Q1: 20 V/V
    • INA302A2-Q1, INA303A2-Q1: 50 V/V
    • INA302A3-Q1, INA303A3-Q1: 100 V/V
  • AEC-Q100 qualified for automotive applications
    • Temperature grade 1: –40°C ≤ TA ≤ +125°C
    • HBM ESD classification level 2
    • CDM ESD classification level C6
  • Functional Safety-Capable
  • Wide common-mode input range: –0.1 V to +36 V
  • Dual comparator outputs:
    • INA302-Q1: Two independent overlimit alerts
    • INA303-Q1: 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-Q1, INA303A1-Q1: 20 V/V
    • INA302A2-Q1, INA303A2-Q1: 50 V/V
    • INA302A3-Q1, INA303A3-Q1: 100 V/V

The INA302-Q1 and INA303-Q1 (INA30x-Q1) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302-Q1 comparators are configured to detect and respond to overcurrent conditions. The INA303-Q1 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. In addition, these devices will survive with common-mode voltages as high as 40 V.

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-Q1 and INA303-Q1 (INA30x-Q1) devices feature a high common-mode, bidirectional, current-sensing amplifier and two high-speed comparators to detect out-of-range current conditions. The INA302-Q1 comparators are configured to detect and respond to overcurrent conditions. The INA303-Q1 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. In addition, these devices will survive with common-mode voltages as high as 40 V.

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.

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INA300-Q1 ACTIVE AEC-Q100, 36V current sense comparator The INA301-Q1 has a single ALERT with similar performance
INA301-Q1 ACTIVE AEC-Q100, 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator The INA302-Q1 has dual over-current comparators

Technical documentation

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Type Title Date
* Data sheet INA30x-Q1 AEC-Q100, 36-V, Bidirectional, 550-kHz, 4V/µs, High-Precision Current Sense Amplifier With Dual Window Comparator datasheet (Rev. A) 25 May 2021
Application note Measuring Current for Handle Multiple Out-of-Range Conditions (Rev. C) 04 Oct 2021
Application note Integrating the Current Sensing Signal Path (Rev. B) 29 Sep 2021
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Functional safety information INA30x-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 15 Apr 2021
Application note High-Side Motor Current Monitoring for Over-Current Protection (Rev. B) 23 Feb 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) 06 Mar 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Application note Overcurrent event detection circuit 31 Jul 2018
Application note Integrating a Current Sense Resistor With a Current Sense Amplifier (Rev. B) 20 Jul 2018
Application note Overcurrent and Out-of-Range Protections (Rev. C) 18 May 2018
Application note Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) 05 Sep 2017
Technical article System trade-offs for high- and low-side current measurements 01 Jun 2017
White paper Overcurrent protection enables more efficient and reliable systems 16 May 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 (...)
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Evaluation board

TMAG5124EVM — TMAG5124 2-wire Hall-effect switch evaluation module

The TMAG5124EVM is the evaluation module (EVM) for the TMAG5124, a 2-wire Hall effect sensor that utilizes a closed current loop as the signal of interest. The EVM is intended to facilitate rapid, convenient use of the device family and consists of a single printed-circuit board (PCB) that can be (...)

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Simulation model

INA303 TINA-TI Reference Design (Rev. A)

SBOMAB9A.TSC (306 KB) - TINA-TI Reference Design
Simulation model

INA303 TINA-TI Spice Model

SBOMAC0.ZIP (29 KB) - TINA-TI Spice Model
Simulation model

INA303 PSpice Model

SBOMB40.ZIP (63 KB) - PSpice Model
Simulation model

INA303A3 PSpice Model

SBOMBG0.ZIP (33 KB) - PSpice Model
Simulation model

INA303A1 PSpice Model

SBOMBH6.ZIP (33 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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 (...)
Design tool

CIRCUIT060035 — Bidirectional current sensing with a window comparator circuit

This bidirectional current sensing solution uses a current-sense amplifier and a high-speed dual comparator with a rail-to-rail input common mode range to create over-current (OC) alert signals at the comparator outputs (OUTA and OUTB) if the input current (IG1) rises above 100 A or falls below (...)
Design tool

CIRCUIT060037 — Precision over-current latch circuit

This high-side, current sensing solution uses a current sense amplifier, a comparator with an integrated reference and a P-channel MOSFET to create an over-current latch circuit. When a load current greater than 200 mA is detected, the circuit disconnects the system from its power source. The (...)
Reference designs

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 (...)

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TSSOP (PW) 14 View options

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