INA302

TSSOP (PW)

14

32 mm² 5 x 6.4

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.

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INA301

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36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator The INA301 has a single ALERT with similar performance

INA303

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36V, bi-directional, 550kHz, 4V/µs, high-precision current sense amplifier w/ window comparator The INA303 has window comparotor functionality

Technical documentation

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	Type	Title	Date
*	Data sheet	INA30x 36-V, Overcurrent Protection, Precision, Current-Sense Amplifiers With Dual Integrated Comparators datasheet (Rev. C)	26 Mar 2019
	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
	Selection guide	Current Sense Amplifiers (Rev. E)	20 Sep 2021
	Technical article	Solving the multidecade current-measurement challenge in your 48-V BMS application	14 Jun 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
	E-book	Simplifying Current Sensing (Rev. A)	09 Jan 2020
	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	Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout	27 Oct 2017
	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
	User guide	INA302 and INA303 Evaluation Modules	27 Jan 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

INA302EVM — INA302 High-Speed Precision Current-Sense Amplifier Evaluation Module

The INA302EVM evaluation module (EVM) is a compact, easy-to-use platform for evaluating the main features and performance of the INA302 High-Speed Precision Current-Sense Amplifier with Dual Integrated Comparators, across its specified input voltage, common-mode voltage and temperature ranges. The (...)

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User guide

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Simulation model

INA302 TINA-TI Spice Model

SBOMAC1.ZIP (30 KB) - TINA-TI Spice Model

Simulation model

INA302 TINA-TI Reference Design

SBOMAC2.TSC (324 KB) - TINA-TI Reference Design

Simulation model

INA302 PSpice Model

SBOMB41.ZIP (64 KB) - PSpice Model

Simulation model

INA302A1 PSpice Model

SBOMBH3.ZIP (35 KB) - PSpice Model

Simulation model

INA302A2 PSpice Model

SBOMBH4.ZIP (35 KB) - PSpice Model

Simulation model

INA302A3 PSpice Model

SBOMBH5.ZIP (35 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 (...)

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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 (...)

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User guide

Calculation tool

Current Sense Amplifier Comparison and Error Tool (Rev. D)

SBOR020D.ZIP (582 KB)

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 (...)

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 (...)