Part Number:INA240
I would like to use INA240 in circuit shown below, here the REF1/2 are connected to split the
power supply by half. See tab2, page 19, Vos_ref; what value of Vref shall I put into equation?
Vref seems to be nominal Vs/2 but I can guess REF2/1 resistor aren’t equal.
How such a connection affects error budget?
Can Ti Support briefly explain and share the definitions of Reference divider accuracy, and RVRR?
In my situation Vref1=gnd/Vref2=Vs. I got roughly Half supply. Does it mean that Vos is near zero?
Shall I put Vos ref as :
Vosref = RVRR x [ Vs/2 - Vs/2*(1+0.1%)]
What is the Vref in the equation - ? (see drawing below)
Can I use 0.1% reference divider accuracy to calculate the Vos_ref?
As You know we don’t use differential ADC, so the divider accuracy will put some offset to the INA240 internal connections.
The example from datasheet are not similiar to mine. The don’ use internal Ref divider.
---------------------------------------------
