HDC2010: Confused with the statement "RH (11 bit) + Temperature (11 bit)"

Dear Vishnu - 

the registers themselves are 16 bits wide, however the configuration of the measurement returned from the device represents 14, 11 or 9 bit based results.

Meaning - the steps represented for each resolution would be seen as being based in the exponent, where 14 bit = 2^14 = 16384 steps, 11 bit  = 2^11 = 2048 steps and 9 bit  = 2^9 = 512 steps, so if you look at the range from 0 to 100%RH, this means that for 14 bit resolution, each step would equal ~0.0061%RH, for 11 bit, each step would equal ~ 0.0488%RH and for 9 bit, each step would represent ~ 0.1953%RH. Make sense? 

Dear Vishnu - 

the device will output values, based on the resolution setting in register 0x0F (bits 4 through 7), that is correct. 

Dear Vishnu - 

the typical current consumption is 650uA for humidity conversion and 550uA for temp conversion. The current draw difference between resolutions would be over time. The typical current consumption is same for each resolution, and each resolution takes a different amount of time for the conversion.

from the typical #'s in datasheet, i calculate: 

for 14 bit temp and humidity...(550uA * 610uSec) + (650uA * 660uSec) = 764nA over 1 second interval, 814nA if you add in sleep current 

for 11 bit temp and humidity...(550uA * 350uSec) + (650uA * 400uSec) = 452nA over 1 second interval, 502nA if you add in sleep current 

for 9 bit temp and humidity...(550uA * 225uSec) + (650uA * 275uSec) = 302nA over 1 second interval, 352nA if you add in sleep current