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Texas Instruments INA231 Current-Shunt & Power Monitors

Texas Instruments INA231 Current-Shunt and Power Monitors come with a 1.8V compliant I2C interface that features 16 programmable addresses. The device monitors both shunt voltage drops and bus supply voltage. Programmable calibration value, conversion times, and averaging combined with an internal multiplier enable direct readouts of current in amperes and power in watts. The INA231 senses current on buses that vary from 0V to 28V. The device is powered from a single 2.7V to 5.5V supply, drawing 330µA (typical) of supply current. The INA231 is specified over the operating temperature range of –40°C to +125°C.

Features

  • Bus voltage sensing from 0V to 28V
    • High or low-side sensing
  • Current, voltage, and power reporting
  • High accuracy
    • 0.5% Gain error (max)
  • 50µV Offset (max)
  • Configurable averaging options
  • Programmable alert threshold
  • 1.8V I2C Compliant
  •  2.7V to 5.5V Power-supply operation
  • Start-up mode options
    • INA231A: Active conversion
    • INA231B: Low-current power down

Applications

  • Smartphones
  • Tablets
  • Servers
  • Computers
  • Power management
  • Battery chargers
  • Power supplies
  • Test equipment

Functional Block Diagram

Block Diagram - Texas Instruments INA231 Current-Shunt & Power Monitors
Published: 2017-11-08 | Updated: 2022-07-11