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Current sense amplifiers analog output

INA190

ACTIVE

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

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Data sheet

INA190

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 Catalog 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 Catalog Operating temperature range (C) -40 to 125
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
  • 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.

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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) PDF | HTML 09 Nov 2019
Application note Under the Hood: Full-Scale & Dynamic Range Considerations of Current Sense Amps PDF | HTML 18 Nov 2022
Application note Precision Current Measurements on High-Voltage Power-Supply Rails (Rev. E) PDF | HTML 30 Mar 2022
Application note Current Sensing Applications in Communication Infrastructure Equipment (Rev. B) PDF | HTML 10 Mar 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
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 Improving Power Amplifier Efficiency with Current Monitors (Rev. A) PDF | HTML 29 Dec 2020
Circuit design Low-Drift, Low-Side, Bidirectional Current Sensing Circuit (Rev. A) PDF | HTML 02 Dec 2020
E-book Simplifying Current Sensing (Rev. A) 09 Jan 2020
Technical article The need for current sensing in optical modules for 100G and beyond 15 Mar 2019
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
Circuit design 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
EVM User's guide INA190EVM User's Guide (Rev. A) 27 Sep 2018
Circuit design 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. (...)
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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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Simulation model

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 (...)
User guide: PDF
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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 (...)
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Calculation tool

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

SBOR020E.ZIP (592 KB)
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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 (...)
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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 (...)
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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 (...)
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CAD/CAE symbol

INA190 CAD File

SBOR016.ZIP (8 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 (...)

Schematic: PDF
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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