Digital power monitors

Optimize your system with power monitoring and improved accuracy all with a wide common-mode range

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Digital power monitors perform mathematical processing on chip, freeing up system processors to handle other tasks. Providing higher bit-depth with additional features, such as ALERTs, energy accumulation, and ambient temperature sensing, our portfolio of digital power monitors helps address the needs of various application types, especially those that need multidecade current sensing from 1000 A to 100 mA.

Browse by parametric specification

Common-mode voltage

Select the common-mode voltage requirement for your current sensing application

Accuracy

Minimize current measurement error with highly accurate current sense amplifiers.

Resolution

Select your desired resolution of the integrated analog-to-digital converter (ADC)

INA4230
Digital power monitors

Quad channel, 16-bit, high-precision, current, voltage, power and energy monitor with I²C Interface

Approx. price (USD) 1ku | 1.5

INA4235
Digital power monitors

Quad channel, 16-bit, ultra-precise, current, voltage, power and energy monitor with I²C Interface

Approx. price (USD) 1ku | 2.5

Technical resources

Video
Video
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 Energy Storage
Monitoring current inflow and outflow from battery energy storage systems ensures proper operation and maximizes system efficiency
Automotive Advanced Driver Assistance Systems
Precision current sensing can help your advanced driver assistance systems operate correctly for safe vehicle operation
Video Surveillance
Measure current feedback and cycle camera functionality: LEDs, heaters and motors, to stay below Power over Ethernet class limits and avoid power sourcing equipment shutdown

Monitoring current inflow and outflow from battery energy storage systems ensures proper operation and maximizes system efficiency

Precision monitoring of current, voltage, power and energy enables battery health monitoring and discrete fuel gauging of energy storage systems.

Benefits:

  • Current measurements with <0.5% full-scale error over –40°C to +125°C temperature range.
  • Monitoring the current and bus voltage in a single solution minimizes board space requirements for diagnostics.
  • Flexible alert configurations enable the detection of multiple fault conditions.
  • An operational common-mode voltage as high as 85 V allows use on multiple battery systems.

Featured resources

REFERENCE DESIGNS
  • TIDA-00639 – 600V Uni-directional Current/Voltage/Power Monitoring for Solar Smart Combiner Box Reference Design
  • TIDA-00528 – 40 V to 400 V Uni-directional Current/Voltage/Power Monitoring Reference Design
PRODUCTS
  • INA228 – 85-V, 20-bit, ultra-precise, I2C output current/voltage/power/energy/charge monitor with alert
  • INA238 – 85-V, 16-bit, high-precision I2C output current/voltage/power monitor with alert
  • INA237 – 85-V, 16-bit, I2C output current/voltage/power monitor with alert
DESIGN TOOLS AND SIMULATION
SOFTWARE DEVELOPMENT

Precision current sensing can help your advanced driver assistance systems operate correctly for safe vehicle operation

Precision monitoring helps develop safer systems by measuring current and voltage to ensure safe operating conditions at controllers and the sensors systems such as radar, LiDAR, ultrasonic and cameras.

Benefits:

  • Current measurements with <0.5% full-scale error over –40°C to +125°C temperature range.
  • Monitoring the current and bus voltage in a single solution minimizes board space requirements for diagnostics.
  • Flexible alert configurations enable the detection of multiple fault conditions.
  • An operational common-mode voltage as high as 85 V allows use on multiple battery systems.

Featured resources

PRODUCTS
  • INA238-Q1 – AEC-Q100, 85-V, 16-bit, high-precision, I²C output current/voltage/charge monitor
  • INA226-Q1 – AEC-Q100, 36V, 16-bit, ultra-precise, i2c output current/voltage/power monitor w/alert
  • INA3221-Q1 – AEC-Q100, 26V, triple channel, 13-bit, i2c output current/voltage monitor w/alerts
DESIGN TOOLS AND SIMULATION

Measure current feedback and cycle camera functionality: LEDs, heaters and motors, to stay below Power over Ethernet class limits and avoid power sourcing equipment shutdown

Precision monitoring of a camera input's AC/DC supply and Ethernet power can help prevent overcurrent and overvoltage events.

Benefits:

  • Monitoring current and bus voltage in a single solution minimizes board space requirements and increases ease of use.
  • Current measurements with <0.5% full-scale error over –40°C to +125°C temperature range.
  • Flexible alert configurations enable the detection of multiple fault conditions.
  • An operational common-mode voltage as high as 85 V allows use on the higher-voltage rail of flyback converters.

Featured resources

PRODUCTS
  • INA219 – 26-V 12-bit I2C output digital power monitor
  • INA237 – 85-V, 16-bit, I2C output current/voltage/power monitor with alert
  • INA180 – 26V, 350kHz current sense amplifier
DESIGN TOOLS AND SIMULATION
SOFTWARE DEVELOPMENT

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 (...)
IDE, configuration, compiler or debugger
System configuration tool

SysConfig is a configuration tool designed to simplify hardware and software configuration challenges to accelerate software development.

SysConfig is available as part of the Code Composer Studio™ integrated development environment as well as a standalone application. Additionally SysConfig (...)

Evaluation board
INA232, INA234 and INA236 evaluation module for current/voltage/power monitors
This evaluation module (EVM) is an easy-to-use platform to evaluate the main features and performance of the INA232, INA234 or INA236. The EVM comes with GUI support to read and write to device registers.