Top

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, 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

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

All trademarks are the property of their respective owners.

open-in-new Find other Current sense amplifiers analog output

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.

open-in-new Find other Current sense amplifiers analog output
Download
Similar products you might be interested in
open-in-new Compare products
Same functionality and pinout but is not an equivalent to the compared device:
INA186 ACTIVE 40V, bi-directional, high-precision current sense amplifier w/ picoamp IB & ENABLE The INA186 is functionally identical with reduced accuracy at a lower price
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
INA191 ACTIVE 40V, ultra-precise current sense amplifier with ENABLE and picoamp IB in WCSP The INA191 is functionally identical in WCSP
Similar but not functionally equivalent to the compared device:
NEW INA2191 PREVIEW 40-V, dual channel, bi-directional, ultra-precise current sense amp w/ picoamp IB & ENABLE in WCSP Dual-channel with similar performance

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 16
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
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
Technical article System trade-offs for high- and low-side current measurements Jun. 01, 2017

Design & development

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

Hardware development

EVALUATION BOARD 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 MODEL Download
SBOMAI6C.ZIP (60 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SBOMAI7B.TSC (196 KB) - TINA-TI Reference Design
SIMULATION MODEL Download
SBOMB94.ZIP (29 KB) - PSpice Model
SIMULATION MODEL Download
SBOMB95.ZIP (29 KB) - PSpice Model
SIMULATION MODEL Download
SBOMB96.ZIP (30 KB) - PSpice Model
SIMULATION MODEL Download
SBOMB97.ZIP (29 KB) - PSpice Model
SIMULATION MODEL Download
SBOMBB0.ZIP (29 KB) - PSpice Model
SIMULATION TOOL 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 TOOL 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
CALCULATION TOOL Download
SBOR020A.ZIP (525 KB)
CAD/CAE SYMBOL 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
REFERENCE DESIGNS Download
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 document-generic User guide
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

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos