Back to Texas Instruments

Texas Instruments INA4235 16-bit Digital Current Monitor

Texas Instruments INA4235 16-bit Digital Current Monitor includes an I2C/SMBus-compatible interface that is compliant with digital bus voltage range from 1.2V to 5V. This quad-channel digital current monitor senses current on common-mode bus voltages that differ from –0.3V to 48V, independent of the supply voltage. The INA4235 monitor operates from a single 1.7V to 5.5V voltage supply and draws a 400μA typical supply current in normal operation. This digital current monitor can be placed in a low-power standby mode with a 2.5µA typical operating current. The device can be fully disabled using the enable pin to achieve a supply current of less than 50nA.

The INA4235 digital current device monitors the voltage across an external sense resistor and reports values for shunt voltage, bus voltage, current, power, and energy for each channel. This monitor is ideal for retail automation, power management, rack servers, security cameras, and battery cell monitors.

Features

  • High-side or low-side current sensing
  • 1.2V compliant I2C/SMBus interface
  • Operates from a 1.7V to 5.5V power supply
  • 20mV/80mV programmable full-scale range
  • Reports current, voltage, power, and energy
  • –0.3V to 48V input common mode range 
  • Current monitoring accuracy:
    • 16-bit ADC resolution
    • 0.1% gain error (maximum)
    • 10µV offset (maximum)
  • Energy monitoring accuracy:
    • 0.7% full scale (maximum)
  • 0.2% full scale (maximum) power monitoring accuracy
  • 5nA (maximum) low input bias current
  • 50nA (maximum) low disable current
  • Configurable averaging options
  • Alert limits for over and under-current events
  • 16-pin selectable addresses
  • Available in a DSBGA-16 package (1.5mm x 1.5mm)

Applications

  • Notebook computers
  • Battery cell monitors and balancers
  • Security cameras
  • Power management
  • Retail automation
  • Rack servers

Associated Evaluation Board

Texas Instruments INA423xEVM Evaluation Modules (EVMs)

The platform evaluates the main features and performances of the INA4230 and INA4235.

Learn Moreabout Texas Instruments INA423xEVM Evaluation Modules (EVMs) View Productsrelated to Texas Instruments INA423xEVM Evaluation Modules (EVMs)

Functional Block Diagram

Block Diagram - Texas Instruments INA4235 16-bit Digital Current Monitor

Typical Application Diagram

Application Circuit Diagram - Texas Instruments INA4235 16-bit Digital Current Monitor
Published: 2024-07-19 | Updated: 2024-07-26