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Product details

Parameters

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 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

Features

  • 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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Description

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
* Datasheet INA190 Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Precision Current-Sense Amplifier With Enable datasheet (Rev. D) Nov. 09, 2019
White papers Simplifying Current Sensing (Rev. A) Jan. 09, 2020
Application notes Improving Power Amplifier Efficiency with Current Monitors Dec. 20, 2019
Application notes Current Sensing Applications in Communication Infrastructure Equipment Sep. 19, 2019
Technical articles The need for current sensing in optical modules for 100G and beyond Mar. 15, 2019
Application notes Precision, Low-Side Current Measurement (Rev. B) Mar. 06, 2019
Application notes External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) Feb. 19, 2019
Application notes Precision current measurements on high-voltage power-supply rails (Rev. C) Feb. 19, 2019
Application notes Low (microamp), high-side, current-sensing circuit with current-sensing amp Jan. 08, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 2018
User guides INA190EVM User's Guide (Rev. A) Sep. 27, 2018
Application notes Power-Saving Topologies for TI Current Shunt Monitors (Rev. A) Aug. 01, 2018
Application notes Low-drift, low-side, bidirectional current sensing circuit with integrated preci Jun. 28, 2018
Selection guides Current Sense Amplifiers (Rev. D) Apr. 04, 2018
Application notes High-side current shunt monitor circuit to 3-V single-ended ADC Jan. 06, 2018
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016

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
25
Description
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 (...)
Features
  • 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

SIMULATION MODELS Download
SBOMAI6C.ZIP (60 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMAI7B.TSC (196 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMB94.ZIP (29 KB) - PSpice Model
SIMULATION MODELS Download
SBOMB95.ZIP (29 KB) - PSpice Model
SIMULATION MODELS Download
SBOMB96.ZIP (30 KB) - PSpice Model
SIMULATION MODELS Download
SBOMB97.ZIP (29 KB) - PSpice Model
SIMULATION MODELS Download
SBOMBB0.ZIP (29 KB) - PSpice Model
SIMULATION TOOLS Download
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 (...)
Features
  • 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
  • (...)
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
CAD/CAE SYMBOLS Download
SBOR016.ZIP (8 KB)

Reference designs

REFERENCE DESIGNS Download
IEPE Sensor analog front-end with digital interface reference design
TIDA-010045 — Industrial vibration sensing is a crucial process in condition monitoring, which is necessary for predictive maintenance. An integrated electronic piezoelectric (IEPE)TM sensor is the most common vibration sensor used in the industrial environment. This design is simple sensor analog front-end (...)
document-generic Schematic document-generic User guide

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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