INA233: Supply Current Consumption

Hi Peiheng,

the given current consumption of 310µA typical and 400µA maximum should be an averaged value under normal operation including all the variable conversion times. A faster conversion might draw a somewhat higher supply current during the conversion, but at the same time the conversion lasts less. And a slower conversion might draw a somewhat lower supply current during the conversion, but at the same time the conversion lasts longer. So, I guess, that in a first order approximation changing the conversion time should not significantly change the average current consumption.

See also figures 19...22 of datasheet. And keep in mind, that the current through the pull-up resistors at the digital lines when emitting low level will also contribute to the overall current consumption.

Kai

Peiheng,

Kai is correct here. The changes in the current based on different conversion times should be small, and counterbalanced by the differing amount of the conversion time. If you need specific, transactional Iq values for each conversion time, you will need to characterize these yourself, as we do not provide this in the datasheet. You should also note that Iq will be affected by the speed at which you perform I2C communications as well as temperature, as shown in figures 19-22 of the datasheet.