INA226: Is there a limit to the voltage between the shunt resistors up to about 82 mV as shown below?

Hi Yasuhiro,

there's a 16bit ADC in the INA226 with a 1 LSB step size of 2.5µV. 2.5µV x 65536 = +/-81.92mV. Everything beyond this input voltage range will overrange the internal 16bit ADC.

Kai

Hi,

The differential voltage across shunt resistor of up to 82 mV can be accurately measured. Obviously the device won’t be able to measure accurately when the input voltage is out of range, as Kai mentioned.

It is possible to use it in the configuration of shunt resistance: 1Ω and current: Max 0.7A. The problem though, is the max input would be 700mV which is out of range.

Under the above conditions, there is no accuracy to speak of because the input is out of range. But the device will continue to function and won’t be damaged. The specified input limits are:

Regards, Guang

Hi, Kai and Guang ,

Thank you for your prompt response.

I understand that it can be used under the condition of 1Ω / 0.7A, but the current cannot be measured accurately.

Thank you for your support.