Texas Instruments INA3221 Voltage/Current/Power (I2C)

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File:TArduinoTexasInstrumentsINA3221.png

Summary

Texas Instruments INA3221 triple-channel current/voltage monitor with I²C interface for power monitoring applications.

Description

The **INA3221 Current/Voltage Monitor** measures bus voltage and shunt voltage drop across three independent channels with programmable conversion times and averaging. It provides critical power monitoring data via I²C interface with configurable alert thresholds for critical and warning conditions on each channel.

Diagram:

Properties

  • Enabled – Enables or disables the monitor.
  • Address – I²C device address (Default: S40).
  • Name – Component identifier name.
  • Averaging – Measurement averaging mode setting.
  • Voltage Conversion Time – Voltage conversion time settings:
    • Bus – Bus voltage conversion time in microseconds (Default: 1100).
    • Shunt – Shunt voltage conversion time in microseconds (Default: 1100).
  • Power Down – Controls power down mode (Default: False).
  • Single Shot – Enables single-shot measurement mode (Default: False).
  • Latching – Alert latching configuration:
    • Critical – Critical alert latching (Default: False).
    • Warning – Warning alert latching (Default: False).
  • Power Valid – Power valid monitoring:
    • Limits – Power valid limits:
      • Max – Maximum valid voltage (Default: 10).
      • Min – Minimum valid voltage (Default: 9).
  • Channels – Channel configuration (4 configurable channels):
    • Add To Sum – Include channel in sum calculation (Default: True).
    • Enabled – Enables channel monitoring (Default: True).
    • Shunt Resistor – Shunt resistor value in Ohms (Default: 20).
    • Alerts – Channel alert configuration:
      • Critical – Critical alert threshold voltage (Default: 32.767).
      • Warning – Warning alert threshold voltage (Default: 32.767).

Pins

Input Pins

  • Clock – Monitor clock input.

Output Pins

  • Channels[0]: Power (analog) – Channel 0 power measurement.
  • Channels[0]: Bus Voltage (analog) – Channel 0 bus voltage measurement.
  • Channels[0]: Current (analog) – Channel 0 current measurement.
  • Channels[0]: Shunt Voltage (analog) – Channel 0 shunt voltage measurement.
  • Channels[0]: Alerts: Critical Out (digital) – Channel 0 critical alert.
  • Channels[0]: Alerts: Warning Out (digital) – Channel 0 warning alert.
  • Channels[1]: Power (analog) – Channel 1 power measurement.
  • Channels[1]: Bus Voltage (analog) – Channel 1 bus voltage measurement.
  • Channels[1]: Current (analog) – Channel 1 current measurement.
  • Channels[1]: Shunt Voltage (analog) – Channel 1 shunt voltage measurement.
  • Channels[1]: Alerts: Critical Out (digital) – Channel 1 critical alert.
  • Channels[1]: Alerts: Warning Out (digital) – Channel 1 warning alert.
  • Sum Channel: Out (analog) – Sum of all channels measurement.
  • Alerts: Power Valid Out (digital) – Power valid status output.
  • Alerts: Bad Timing (digital) – Timing error indication.
  • Control (digital) – Control and status signals.
  • Interface (i2c) – I²C communication interface.

Categories

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