Tool/software:
Hello,
I am using the ADC ADS5562 and I don't understand how to compute the resolution (V per 1LSB).
In the datasheet at page 29 we have a tab with different gain and the corresponding full scale but no formula.
Is the resolution equal to : Full_scale_range / 2^16 ?
Moreover the other gains do not match with the full scale voltage.
For example if I take the default gain (1dB) which give a full scale of 3.56V so as to compute the full scale with the 2dB gain, I have 3.56 x 10^(-1/20) = 3.17V and not 3.2V.
So, to compute the resolution, must I use 3.2V/2^16 or 3.17/2^16 ?
It is the same thing with other gains without the 6dB gain that give me the same result as the datasheet.
It is thank to this method that I can retreive results in the example for the 0dB (page29) : resolution = 3.56 x 10^(1/20) / 2^16 => so, for 3.56V input, I get 58409 like in the datasheet.
And I wonder if setting the data format in 2s complement or in offset binary in the register 0x63 affects the resolution ?
Thank you in advance for your responses
Sincerely