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Adafruit INA3221 3-Ch Power Monitor
Adafruit
The Adafruit INA3221 Breakout is a power monitoring board that measures up to three power supplies over I2C with high precision.
In stock
Specifications
4- Operating Voltage
- 2.7V to 5.5V
- Logic Level
- 3-5V
- Dimensions
- 27.5mm x 18.3mm x
- Connectivity
- I2C, STEMMA QT
Pinout
16| Pin | Name | Functions | Notes |
|---|---|---|---|
| VCC | Power Supply | POWER | This pin powers the board and should be connected to the same voltage level as your microcontroller's logic. |
| GND | Ground | GND | Common ground for power and logic. |
| VPU | Pull-up Supply Voltage | POWER | Used to provide bias to the power valid (VALID) interrupt pin. Connect this pin to VCC to match the same logic level of your microcontroller. |
| SCL | I2C Clock | I2C | Connect to your microcontroller's I2C clock line. This pin can use 3-5V logic, and there's a 10K pullup on this pin. |
| SDA | I2C Data | I2C | Connect to your microcontroller's I2C data line. This pin can use 3-5V logic, and there's a 10K pullup on this pin. |
| STEMMA QT | STEMMA QT Connector | I2C | These connectors allow you to connect to development boards with STEMMA QT (Qwiic) connectors or to other things with various associated accessories. |
| VIN1+ | Input Channel 1 Positive | GPIO | Connect your target power supplies to the positive line of input channel 1. |
| VIN2+ | Input Channel 2 Positive | GPIO | Connect your target power supplies to the positive line of input channel 2. |
| VIN3+ | Input Channel 3 Positive | GPIO | Connect your target power supplies to the positive line of input channel 3. |
| VIN1- | Input Channel 1 Negative | GND | Connect loads to the negative ground line of input channel 1. |
| VIN2- | Input Channel 2 Negative | GND | Connect loads to the negative ground line of input channel 2. |
| VIN3- | Input Channel 3 Negative | GND | Connect loads to the negative ground line of input channel 3. |
| WRN | Warning Alert Interrupt | GPIO | Triggered if the averaged current reading on any input channel exceeds a set threshold. Goes low when triggered. |
| CRI | Critical Alert Interrupt | GPIO | Detects overcurrent on any of the input channels. Goes low when triggered. |
| TC | Timing Control Alert Interrupt | GPIO | Signals if the power supplies connected to the input channels do not power up in the correct sequence. Goes low when triggered. |
| VALID | Power Valid Alert Interrupt | GPIO | You can set an upper and lower limit threshold for this interrupt. Goes high when the upper limit is triggered, goes low when the lower limit is triggered. |
Interactive pinout
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