Home Amplifiers Current-sense amplifiers Analog current-sense amplifiers
Home
Amplifiers
Current-sense amplifiers
Analog current-sense amplifiers

INA190

ACTIVE

40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & ENABLE

Order now
Data sheet

INA190

ACTIVE
Data sheet Order now

Product details

Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
Product type Analog output Common-mode voltage (max) (V) 40 Common-mode voltage (min) (V) -0.2 Input offset (±) (max) (µV) 15 Input offset drift (±) (typ) (µV/°C) 0.01 Features Bidirectional, Low-side Capable, Ultra precise Rating Catalog Voltage gain (V/V) 25, 50, 100, 200, 500 CMRR (min) (dB) 132 Bandwidth (kHz) 27, 33, 35, 37, 45 Supply voltage (max) (V) 5.5 Supply voltage (min) (V) 1.7 Iq (max) (mA) 0.09 Number of channels 1 Comparators (#) 0 Gain error (%) 0.2, 0.3, 0.4 Gain error drift (±) (max) (ppm/°C) 7 Slew rate (V/µs) 0.3 Operating temperature range (°C) -40 to 125
SOT-23-THN (DDF) 8 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 6 4.2 mm² 2 x 2.1 UQFN (RSW) 10 2.52 mm² 1.8 x 1.4
  • 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
  • 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

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.

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.

filter Find other Analog current-sense amplifiers
Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Pin-for-pin with same functionality to the compared device
INA186 ACTIVE 40-V, bidirectional, high-precision current sense amplifier with picoamp input bias & ENABLE The INA186 is functionally identical with reduced accuracy at a lower price.
Same functionality with different pin-out 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

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 16
Top documentation Type Title Format options Date
* Data sheet INA190 Bidirectional, Low-Power, Zero-Drift, Wide Dynamic Range, Precision Current-Sense Amplifier With Enable datasheet (Rev. D) PDF | HTML 09 Nov 2019
Application note Optimal Layout Practices for Low-Ohmic Current Sense Resistors in Parallel PDF | HTML 12 Nov 2025
Application note Risks and Prevention of ESD, EOS, and Latch Up Events for Current Sense Amplifiers PDF | HTML 18 Nov 2024
Circuit design Low (microamp), high-side, current-sensing circuit with current-sensing amp (Rev. A) PDF | HTML 25 Sep 2024
Circuit design High-side current shunt monitor circuit to 3-V single-ended ADC (Rev. A) PDF | HTML 20 Sep 2024
Application brief Current Sensing Applications in Communication Infrastructure Equipment (Rev. C) PDF | HTML 08 Aug 2023
Application brief Improving Power Amplifier Efficiency With Current Monitors (Rev. B) PDF | HTML 24 Jul 2023
Application note Under the Hood: Full-Scale & Dynamic Range Considerations of Current Sense Amps PDF | HTML 18 Nov 2022
Application brief Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. F) PDF | HTML 17 Oct 2022
E-book An Engineer's Guide to Current Sensing (Rev. B) 12 Apr 2022
Application note Using a PCB Copper Trace as a Current-Sense Shunt Resistor PDF | HTML 25 Jan 2022
Selection guide Current Sense Amplifiers (Rev. E) 20 Sep 2021
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 02 Dec 2020
Technical article The need for current sensing in optical modules for 100G and beyond PDF | HTML 15 Mar 2019
Application brief Precision, Low-Side Current Measurement (Rev. B) 06 Mar 2019
Application brief External current sense amps vs integrated onboard amplifiers for current sensing (Rev. B) 19 Feb 2019

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. (...)
User guide: PDF
Not available on TI.com
Simulation model

INA190 TINA-TI Reference Design (Rev. B)

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

INA190 TINA-TI Spice Model (Rev. C)

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

INA190A1 PSpice Model

SBOMB97.ZIP (29 KB) - PSpice Model
Download
Simulation model

INA190A2 PSpice Model

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

INA190A3 PSpice Model

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

INA190A4 PSpice Model

SBOMBB0.ZIP (29 KB) - PSpice Model
Download
Simulation model

INA190A5 PSpice Model

SBOMB96.ZIP (30 KB) - PSpice Model
Download
CAD/CAE symbol

INA190 CAD File

SBOR016.ZIP (8 KB)
Download
Calculation tool

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

Supported products & hardware

Supported products & hardware
Launch Download
Calculation tool

CS-AMPLIFIER-ERROR-TOOL — Current Sense Amplifier Comparison and Error Tool

This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
Supported products & hardware

Supported products & hardware
Download
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 (...)
View Options
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 (...)
View Options
Design tool

CIRCUIT060039 — Low (microamp), high-side, current-sensing circuit with current-sensing amplifier

This circuit demonstrates how to use a current sense amplifier to accurately and robustly measure small micro-amp currents and maximize dynamic range. The following error analysis can be applied to many current sense amplifiers. This design relies on using a precision, low input-bias current sense (...)
View Options
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 (...)
Request
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 (...)
User guide: PDF
View Options
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 (...)

Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23-THN (DDF) 8 Ultra Librarian
SOT-SC70 (DCK) 6 Ultra Librarian
UQFN (RSW) 10 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

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