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 Catalog Operating temperature range (C) -40 to 125 open-in-new Find other Current sense amplifiers analog output

Package | Pins | Size

SOT-23-THN (DDF) 8 8 mm² 2.9 x 2.8 SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 UQFN (RSW) 10 3 mm² 1.8 x 1.4 open-in-new Find other Current sense amplifiers analog output


  • 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 shutdown current: 100 nA (max)
    • Low quiescent current: 50 µA at 25°C (typ)
  • Accuracy:
    • Common-mode rejection ratio: 132 dB (min)
    • Gain error: ±0.2% (A1 device)
    • Gain drift: 7 ppm/°C (max)
    • Offset voltage, VOS: ±15 µV (max)
    • Offset drift: 80 nV/°C (max)
  • Wide common-mode voltage: –0.2 V to +40 V
  • Bidirectional current sensing capability
  • Gain options:
    • INA190A1: 25 V/V
    • INA190A2: 50 V/V
    • INA190A3: 100 V/V
    • INA190A4: 200 V/V
    • INA190A5: 500 V/V
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The INA190 is a low-power, voltage-output, current-shunt monitor (also called a current-sense amplifier). This device is commonly used for overcurrent protection, precision current measurement for system optimization, or in closed-loop feedback circuits. The INA190 can sense drops across shunts at common-mode voltages from –0.2 V to +40 V, independent of the supply voltage.

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 operates from a single 1.7-V to 5.5-V power supply, and draws a maximum of 65 µA of supply current when enabled; only 0.1 µA when disabled. 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 UQFN, SC70, and SOT-23 packages.

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Technical documentation

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Type Title Date
* Data sheet INA190 Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Precision Current-Sense Amplifier With Enable datasheet (Rev. D) Nov. 09, 2019
Technical article Solving the multidecade current-measurement challenge in your 48-V BMS application Jun. 14, 2021
Technical article How current-sense amplifiers monitor satellite health Feb. 08, 2021
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. A) Dec. 29, 2020
Application note Improving Power Amplifier Efficiency with Current Monitors (Rev. A) Dec. 29, 2020
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. D) Dec. 29, 2020
Application note Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) Dec. 02, 2020
E-book Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Technical article The need for current sensing in optical modules for 100G and beyond Mar. 15, 2019
Application note Precision, Low-Side Current Measurement (Rev. B) Mar. 06, 2019
Application note External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Application note Low (microamp), high-side, current-sensing circuit with current-sensing amp Jan. 08, 2019
Technical article A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
User guide INA190EVM User's Guide (Rev. A) Sep. 27, 2018
Selection guide Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application note High-side current shunt monitor circuit to 3-V single-ended ADC Jan. 06, 2018

Design & development

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

Hardware development

document-generic User guide
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 (...)
  • Easy to test INA190 with differential voltage or shunt resistor.
  • Layout for a buffer refence circuit is included for customer to create reference buffer with prefered SOT-23-5 op amp.
  • Breakable panels lets customer experiment and test with all gain variants.
  • A special "Low-Current" board utilizing a (...)

Design tools & simulation

SBOMAI6C.ZIP (60 KB) - TINA-TI Spice Model
SBOMAI7B.TSC (196 KB) - TINA-TI Reference Design
SBOMB94.ZIP (29 KB) - PSpice Model
SBOMB95.ZIP (29 KB) - PSpice Model
SBOMB96.ZIP (30 KB) - PSpice Model
SBOMB97.ZIP (29 KB) - PSpice Model
SBOMBB0.ZIP (29 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — 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 (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
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
SBOR020C.ZIP (568 KB)
SBOR016.ZIP (8 KB)

Reference designs

Current Shunt Monitor with Transient Robustness Reference Design
TIDA-00302 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 (...)

document-generic Schematic
Design files

CAD/CAE symbols

Package Pins Download
SC70 (DCK) 6 View options
SOT-23-THIN (DDF) 8 View options
UQFN (RSW) 10 View options

Ordering & quality

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Support & training

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