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Current sense amplifiers analog output

INA190-Q1

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AEC-Q100, 40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE

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Data sheet
AEC-Q100, 40V, bi-directional, ultra-precise current sense amplifier w/picoamp IB & ENABLE

INA190-Q1

ACTIVE
Data sheet Order now

Product details

Common mode voltage (Max) (V) 40 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 15 Input offset drift (+/-) (Typ) (uV/C) 0.01 Gain (V/V) 100, 200, 25, 50, 500 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (+/-) (Max) (ppm/°C) 7 CMRR (Min) (dB) 132 Bandwidth (kHz) 45, 37, 35, 32, 27 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 1.7 Iq (Max) (mA) 0.09 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable, Ultra precise Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
Common mode voltage (Max) (V) 40 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 15 Input offset drift (+/-) (Typ) (uV/C) 0.01 Gain (V/V) 100, 200, 25, 50, 500 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (+/-) (Max) (ppm/°C) 7 CMRR (Min) (dB) 132 Bandwidth (kHz) 45, 37, 35, 32, 27 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 1.7 Iq (Max) (mA) 0.09 Number of channels (#) 1 Comparators (#) 0 Features Bi-directional, Low-side Capable, Ultra precise Rating Automotive TI functional safety category Functional Safety-Capable Operating temperature range (C) -40 to 125
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SOT-SC70 (DCK) 6 4 mm² 2 x 2.1
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  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 5 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 0.13 µV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1-Q1: 25 V/V
    • INA190A2-Q1: 50 V/V
    • INA190A3-Q1: 100 V/V
    • INA190A4-Q1: 200 V/V
    • INA190A5-Q1: 500 V/V
  • AEC-Q100 qualified for automotive applications:
    • Temperature grade 1: –40°C to +125°C, TA
  • Low input bias currents: 500 pA (typ)
    (enables microamp current measurement)
  • Low power:
    • Low supply voltage, VS: 1.7 V to 5.5 V
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 5 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 0.13 µV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V with survivability up to 42 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1-Q1: 25 V/V
    • INA190A2-Q1: 50 V/V
    • INA190A3-Q1: 100 V/V
    • INA190A4-Q1: 200 V/V
    • INA190A5-Q1: 500 V/V
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The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in an SC70 package.

The INA190-Q1 is an automotive, low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for monitoring systems directly connected to an automotive 12-V battery. The INA190-Q1 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage. In addition, the input pins have an absolute maximum voltage of 42 V.

The low input bias current of the device permits the use of larger current-sense resistors, thus providing accurate current measurements in the microamp range. The low offset voltage of the zero-drift architecture extends the dynamic range of the current measurement. This feature allows for smaller sense resistors with lower power loss, while still providing accurate current measurements.

The INA190-Q1 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current. Five fixed gain options are available: 25 V/V, 50 V/V, 100 V/V, 200 V/V, or 500 V/V. The device is specified over the operating temperature range of –40°C to +125°C, and offered in an SC70 package.

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INA186-Q1 ACTIVE AEC-Q100, 40-V, bidirectional, high-precision current sense amplifier w/ picoamp input bias & ENABLE The INA186-Q1 is functionally identical with reduced accuracy at a lower price

Technical documentation

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Type Title Date
* Data sheet INA190-Q1 Automotive, 40-V, High Precision, Low Bias Current, Low Power, Current Sense Amplifier datasheet 23 May 2019
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application 14 Jun 2021
Technical article How current-sense amplifiers monitor satellite health 08 Feb 2021
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. D) 29 Dec 2020
Application note Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) 02 Dec 2020
Functional safety information INA190-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA 06 Aug 2020
Technical article Dark-current measurement in automotive telematics applications 04 Mar 2020
Application note Precision, Low-Side Current Measurement (Rev. B) 06 Mar 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019
Application note Low (microamp), high-side, current-sensing circuit with current-sensing amp 08 Jan 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature 04 Oct 2018
Application note High-side current shunt monitor circuit to 3-V single-ended ADC 06 Jan 2018

Design & development

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

Evaluation board

INA190EVM — INA190 current sensing evaluation module with low current layout

This is a small module with 6 completely independent boards that can be broken off by the user. Five identical boards (20A rating) can be used for the five device gain variants. A sixth board (10A rating) with a special guarding layout can be used for especially low-current measurement systems. Each (...)
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Simulation model

INA190 TINA-TI Spice Model (Rev. C)

SBOMAI6C.ZIP (60 KB) - TINA-TI Spice Model
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Simulation model

INA190 TINA-TI Reference Design (Rev. B)

SBOMAI7B.TSC (196 KB) - TINA-TI Reference Design
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Simulation model

INA190A2 PSpice Model

SBOMB94.ZIP (29 KB) - PSpice Model
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Simulation model

INA190A3 PSpice Model

SBOMB95.ZIP (29 KB) - PSpice Model
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Simulation model

INA190A5 PSpice Model

SBOMB96.ZIP (30 KB) - PSpice Model
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Simulation model

INA190A1 PSpice Model

SBOMB97.ZIP (29 KB) - PSpice Model
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INA190A4 PSpice Model

SBOMBB0.ZIP (29 KB) - PSpice Model
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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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Calculation tool

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

SBOR020D.ZIP (582 KB)
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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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SC70 (DCK) 6 View options

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