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INA220: Question about Mode Setting and ADC Register

Walsh
Intellectual 950 points
Part Number: INA220
Other Parts Discussed in Thread: INA226

Hi,

My customer meets below questions while using INA226. Could someone please help to make it clear?

1) About Table 5. Mode Settings[2:0]

If i set "Shunt voltage, triggered", how to operate? Whether it will produce a trigger or not when i set "Shunt voltage, triggered". Or need other action to trigger?

2) About ADC

Is it the same confige rule for BADC and SADC? How to understand the resolution of Register 0x00? what's difference between 0x00 and 0x01?

3) About test result between Continuous mode and Triggered mode

When test Shunt voltage, the result will be maximum scale positive value by using continuous mode and the result will be lesser negative value by using triggered mode.

Thanks,

Walsh

  • 0
    TI__Expert 4915 points

    Hi Walsh,

    Thank you for using the E2E forums.

    1) If 'Shunt Voltage triggered' option is chosen, writing any of the triggered convert modes into the Configuration Register (00h) (that is, MODE bits of the Configuration Register (00h) are set to ‘001’, ‘010’, or ‘011’) triggers a single-shot conversion. This action produces a single set of measurements; thus, to trigger another single-shot conversion, the Configuration Register (00h) must be written to a second time, even if the mode does not change. This is described in chapter 7.3, Pag. 11.

    2) The rules for BADC and SADC are the same.

    Reg's 0x00 is a read/write register that controls the operating modes for the device while Reg 0x01 is a read only register that stores the Vshunt voltage reading.

    3) I might need clarification on this question. Are you asking whenever the conversion values will be the same using triggered or continuous mode?

  • 0 in reply to Carlos Silva85
    Intellectual 950 points
    Thanks, Carlos. I will study it.

    Walsh