Home Amplifiers Current sense amplifiers Current sense amplifiers analog output

INA181

ACTIVE
Order now

26V, bi-directional, 350kHz current sense amplifier

Data sheet
Top
26V, bi-directional, 350kHz current sense amplifier

INA181

ACTIVE
Data sheet Order now

Product details

Parameters

Common mode voltage (Max) (V) 26 Common mode voltage (Min) (V) -0.2 Input offset (+/-) (Max) (uV) 150 Input offset drift (+/-) (Typ) (uV/C) 0.2 Gain (V/V) 100, 20, 200, 50 Gain error (%) 1 Gain error drift (+/-) (Max) (ppm/°C) 20 CMRR (Min) (dB) 84 Bandwidth (kHz) 350, 210, 150, 105 Supply voltage (Max) (V) 5.5 Supply voltage (Min) (V) 2.7 Iq (Max) (mA) 0.3 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 (DBV) 6 5 mm² 2.9 x 1.6 open-in-new Find other Current sense amplifiers analog output

Features

  • Common-mode range (VCM): –0.2 V to +26 V
  • High bandwidth: 350 kHz (A1 devices)
  • Offset voltage:
    • ±150 µV (maximum) at VCM = 0 V
    • ±500 µV (maximum) at VCM = 12 V
  • Output slew rate: 2 V/µs
  • Bidirectional current-sensing capability
  • Accuracy:
    • ±1% gain error (maximum)
    • 1-µV/°C offset drift (maximum)
  • Gain options:
    • 20 V/V (A1 devices)
    • 50 V/V (A2 devices)
    • 100 V/V (A3 devices)
    • 200 V/V (A4 devices)
  • Quiescent current: 260 µA maximum (INA181)

All trademarks are the property of their respective owners.

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

Description

The INA181, INA2181, and INA4181 (INAx181) current sense amplifiers are designed for cost-optimized applications. These devices are part of a family of bidirectional, current-sense amplifiers (also called current-shunt monitors) that sense voltage drops across current-sense resistors at common-mode voltages from –0.2 V to +26 V, independent of the supply voltage. The INAx181 family integrates a matched resistor gain network in four, fixed-gain device options: 20 V/V, 50 V/V, 100 V/V, or 200 V/V. This matched gain resistor network minimizes gain error and reduces the temperature drift.

These devices operate from a single 2.7-V to 5.5-V power supply. The single-channel INA181 draws a maximum supply current of 260 µA; whereas, the dual-channel INA2181 draws a maximum supply current of 500 µA, and the quad-channel INA4181 draws a maximum supply current of 900 µA.

The INA181 is available in a 6-pin, SOT-23 package. The INA2181 is available in 10-pin, VSSOP and WSON packages. The INA4181 is available in a 20-pin, TSSOP package. All device options are specified over the extended operating temperature range of –40°C to +125°C.

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

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 16
Type Title Date
* Datasheet INAx181 Bidirectional, Low- and High-Side Voltage Output, Current-Sense Amplifiers datasheet (Rev. G) May 05, 2020
More literature Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
Application notes Adjustable-gain, current-output, high-side current-sensing circuit Aug. 09, 2019
Application notes Fast-response overcurrent event detection circuit May 27, 2019
Application notes Bidirectional, Low-Side Phase Current Sensing With Onboard Overcurrent Detection (Rev. D) Mar. 06, 2019
Technical articles A key to accurate system thermal management: monitoring both current flow and temperature Oct. 04, 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 Closed-Loop Analysis of Load-Induced Amplifier Stability Issues Using Zout Oct. 27, 2017
Application notes Low-Drift, Low-Side Current Measurements for Three-Phase Systems (Rev. B) Sep. 05, 2017
Application notes Low Cost Bidirectional Current Sensing Using INA181 Jul. 28, 2017
Technical articles Precise constant current regulation helps advance fast-charging Jun. 15, 2017
Technical articles System trade-offs for high- and low-side current measurements Jun. 01, 2017
Application notes Low-Side Current Sense Circuit Integration Mar. 30, 2017
Technical articles Why should you care about overcurrent protection in your system? Jun. 16, 2016
User guides INA180-181 EVM User's Guide Jan. 19, 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
$10.00
Description
The INA180 is an Op-Amp current sense integration circuit that provides ease of use and high performancce. The INA181 has the same capabilities of the INA180 but with the addition of the reference pin that enables bidirectional current measurements. The INA180-181EVM is intended to provide basic (...)
Features
  • Evaluation of all gain options for the INA180Ax and INA181Ax
  • Ease of access to device pins with test points
  • Capability to evaluate high-side and low-side configurations
View details

Design tools & simulation

SIMULATION MODELS Download
SBOMAD3A.ZIP (35 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SBOMAD4B.TSC (2820 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOMAD5B.ZIP (2070 KB) - PSpice Model
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

Reference designs

REFERENCE DESIGNS Download
94.5% Efficiency, 500W industrial AC-DC reference design
TIDA-010015 — This reference design is a compact, high efficiency, 24-V DC, 500-W reference design for industrial AC/DC power supplies. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on the UCC28064A. This minimizes the PFC inductor size and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
93% Efficiency, 400-W AC/DC reference design for avionics
PMP30763 — This is a compact, 30-V DC, 400-W reference design for avionics applications, accepting main frequencies between 400 Hz and 800 Hz. This design consists of a front-end, two-phase interleaved transition mode (TM) power factor correction (PFC) based on UCC28064A. This minimizes the PFC inductor size (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Supercapacitor backup power supply with current limit and active cell balancing reference design
PMP30693 — This reference design automatically provides a back-up voltage during a power interruption. It manages the charging of supercapitors and provides reverse blocking protection. The maximum supercapacitor charging current and voltage can be adjusted. When the input voltage fails a buck-boost converter (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
650W Power Stage Without Heat Sink Reference Design for Low-Frequency Offline UPS and Inverters
TIDA-01292 — This reference design is a 650-W inverter power stage designed for low-frequency (transformer-based), single-phase UPS operating from a 12-V battery. The design enables low form factor and high-efficiency implementation, taking advantage of the TI SMD MOSFET in a SON5x6 package with very low RDS(on (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
2-cell boost charge system reference design with 5-V USB
PMP40496 — This 5-V USB, 2-cell battery boost charger reference design includes a charger system and a 2-cell battery holder with a gauge that can be connected by a cable or work independently. The key components of the charger system include the BQ25883 boost charger, TUSB320LAI Type-C CC logic, MSP430FR2433 (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
24-V, 480-W Nominal 720-W peak, >93.5% efficient, robust AC/DC industrial power supply reference
TIDA-01494 — The TIDA-01494 reference design is a compact, high efficiency, 24-V DC, 480-W nominal, 720-W peak output reference design for industrial AC/DC power supplies. The circuit consists of a front-end continuous conduction mode (CCM) power factor correction (PFC) circuit followed by a robust LLC stage (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SOT-23 (DBV) 6 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

View all 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. ​​​​​​​​​​​​​​

Training series

View all TI training and videos

Videos

Over Current Sensing Techniques

Watch this webinar recording to learn more about the over-current protection (OCP). This webinar was brought to you in cooperation with Farnell element 14. 

Posted: 19-Jan-2016
Duration: 07:00

Related videos