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INA3221: INA3221AIRGVR questions

Eric Hsu34
Prodigy 320 points

Part Number: INA3221

1. SMBUS ADDRESS

We're using 4 pcs INA3221AIRGVR on our design, so we need four SMBUS slave address.

As picture below, does it means "A0" connected to SDA/SCL signal directly if we want to select address 1000010/1000011 ?

2. VPU

The VPU is input pin as datasheet mentioned, but the reference schematic looks like output pin.

We wonder to know how to use VPU pin?

3. ALERT Signal

Does the TC(pin13), WARN(pin8), CRITICAL(pin9) signal are low active?

There are not indicate in pin description table.

But I found some information in detail description.

So I'd like to double confirm on it.

  • 0
    TI__Mastermind 26335 points

    Hello Eric,

    Thanks for reaching out on the forum.

    1. Yes A0 can be connected directly.

    2.  I think the excerpt below describes it well.  However, if you need further clarification, please let me know.

    3.  Yes, these alert signal pins' open drain closes when the threshold is exceeded and are therefore active low devices.