Analog current-sense amplifiers

Enable improved system accuracy, feedback control and protection

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Current sense amplifiers have unique front-end architectures that allow their inputs to see voltages that exceed supply. In addition, highly-matched, integrated resistors increase accuracy and stability over temperature while shrinking overall system size. Additionally, this accuracy allows for lower ohmic shunts and power dissipation. With our diverse portfolio of analog-output current sense amplifiers, you can meet your system's precision, drift, and voltage requirements.

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INA185-Q1
Analog current-sense amplifiers

AEC-Q100, 26-V, 350-kHz, bi-directional, high-precision current sense amplifier

Approx. price (USD) 1ku | 0.354

INA310A-Q1
Analog current-sense amplifiers

AEC-Q100 -4-V to 110-V 1.3-MHz ultra-precise current-sense amplifier with comparator and reference

Approx. price (USD) 1ku | 1.44

INA310B-Q1
Analog current-sense amplifiers

AEC-Q100 -4-V to 110-V 1.3-MHz high precision current-sense amplifier with comparator and reference

Approx. price (USD) 1ku | 1.121

INA310B
Analog current-sense amplifiers

-4-V to 110-V 1.3-MHz high-precision current-sense amplifier with comparator

Approx. price (USD) 1ku | 0.95

INA310A
Analog current-sense amplifiers

-4-V to 110-V, 1.3-MHz, ultra-precise current-sense amplifier with comparator

Approx. price (USD) 1ku | 1.22

Technical resources

Video series
Video series
TI Precision Labs - Current sense amplifiers
Check out this comprehensive curriculum for current sense amplifiers. The series is comprised of short training videos that cover the basics of current sense amplifiers, tips for applications, debugging, key specs and more.
E-book
E-book
An Engineer's Guide to Current Sensing (Rev. B)
Explore a comprehensive library of application-specific current sensing design challenges and how to solve them.
document-pdfAcrobat PDF
Selection guide
Selection guide
Current Sense Amplifiers (Rev. E)
Find featured reference designs and current sense amplifier products.
document-pdfAcrobat PDF

Discover featured applications

Battery and semiconductor testing
Achieve high precision current measurements for tighter control with our current-sense amplifiers
Solar energy and metering
Precisely monitor current in solar-powered systems to ensure proper operation and maximum conversion efficiency
Collaborative and industrial robots
Precision current sensing enables increased power efficiency and real-time control in robotics systems
Automotive DC/DC and On-board charging
Precision current sensing can help you optimize power efficiency in your DC/DC and onboard charging systems
Wireless communication infrastructure
Precision current sensing can help you optimize the efficiency of your active antenna systems and remote radio units

Achieve high precision current measurements for tighter control with our current-sense amplifiers

Our current-sense amplifiers for ultra-precise applications enable a variety of measurements for low- or high-side sensing, with common-mode voltages up to 110-V operational and 120-V survivability.

Benefits:

  • Less than 0.5% full-scale error
  • Low input bias currents enable the measuring microamps of current

Featured resources

PRODUCTS
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA293 – -4-V to 110-V, 1.3-MHz, ultra-precise current sense amplifier
  • INA190 – 40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & ENABLE
DESIGN TOOLS AND SIMULATION

Precisely monitor current in solar-powered systems to ensure proper operation and maximum conversion efficiency

In solar-powered systems, precise monitoring of current and the use of maximum power-point tracking in DC/DC converters and other subsystems enables system optimization to ensure maximum efficiency and performance.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • High bandwidth and slew rate enable fast out-of-range detection.

Featured resources

REFERENCE DESIGNS
  • PMP30693 – Supercapacitor backup power supply with current limit and active cell balancing reference design
  • TIDA-050034 – Integrated power supply reference design for NXP i.MX 7D processor
PRODUCTS
  • INA190 – 40-V, bidirectional, ultraprecise current sense amplifier with picoamp IB & ENABLE
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
DESIGN TOOLS AND SIMULATION

Precision current sensing enables increased power efficiency and real-time control in robotics systems

Design with precision current-sense amplifiers for real-time control in robotic systems with in-line phase monitoring in collaborative, industrial robots and mobile robots, increasing the level of control, safety and performance in robotics systems.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • In-line phase motor control with enhanced pulse-width-modulation rejection.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

REFERENCE DESIGNS
  • TIDA-00909 – 48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives
  • TIDA-00913 – 48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
  • TIDA-00302 – Current Shunt Monitor with Transient Robustness Reference Design
PRODUCTS
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA226 – 36V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert
  • INA180 – 26V, 350kHz current sense amplifier
HARDWARE DEVELOPMENT
  • BOOSTXL-3PHGANINV – 48-V Three-Phase Inverter With Shunt-Based In-Line Motor Phase Current Sensing Evaluation Module
DESIGN TOOLS AND SIMULATION
SOFTWARE DEVELOPMENT

Precision current sensing can help you optimize power efficiency in your DC/DC and onboard charging systems

Develop electric vehicle systems with our precision zero-drift current-sense amplifiers, which help you design smaller, more efficient bidirectional DC/DC converters and onboard chargers.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

PRODUCTS
  • INA240-Q1 – AEC-Q100, -4 to 80V, bi-directional, ultra-precise current sense amplifier w/ enhanced pwm rejection
  • INA186-Q1 – AEC-Q100, 40-V, bidirectional, high-precision current sense amplifier w/ picoamp input bias & ENABLE
  • INA181-Q1 – AEC-Q100, 26V, bi-directional, 350kHz current sense amplifier
DESIGN TOOLS AND SIMULATION

Precision current sensing can help you optimize the efficiency of your active antenna systems and remote radio units

Precision current sensing optimizes power amplifier operation by enabling precision calibration through monitoring of the drain current. In addition, fast out-of-range detection helps protect the power amplifier stages.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation supports high-side monitoring of power amplifier stages.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

PRODUCTS
  • INA281 – -4-V to 110-V, 1.3-MHz, high-precision current sense amplifier
  • INA2290 – Dual-channel, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier
DESIGN TOOLS AND SIMULATION

Design & development resources

Calculation 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 (...)
Simulation tool
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 (...)
Evaluation board
INA296x evaluation module for -5-V to 110-V 1.1-MHz current sense amplifier with 5-V/µs slew rate

INA296AEVM is a small module with five completely independent boards that can be broken off by the designer. Five schematically identical boards are available for each of the five gain variations of the INA296x with inputs up to 110-V common-mode and 10-A (onboard shunt) input capability.

Each board (...)