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ADS8910B: Full Scale Range

Part Number: ADS8910B


On the ADS8910B datasheet page-22, you have:


I will interpret it as:

FSR = Vref -(-Vref) = 2*Vref

So this matches the 1LSB formula on page-23

1LSB = (2*Vref)/(2^18) = Vref/2^17

Now, if I connect 2.5V reference voltage to REFIN(pin-3) and connect REFM pin to ground, then I will get 1LSB voltage as following. 

If Vref = 2.5V, then 1LSB = 19.07uV

Is my understanding correct? Please confirm. Thanks so much!