Hi,

In the datasheet, the AD7760 24 bit ADC INL spec is given as 0.00076% typ. Can you please say if this is 0.00076% of the VREF(4V) or 0.00076% of ADC FS input(3.2V)? Or is it just an absolute value = 0.0000076V (which equates to ~32LSB, LSB being 4V/2^24)? I just wanted to know the INL in terms of LSBs or absolute voltage

Thanks,

Anoop

Hi Anoop,

The 0.00076% on the datasheet is a ppm value So it is 7.6ppm INL error. In relation to LSB then 2^24 x 0.00076/100 = 127.5 LSB. This means that AD7760 linearity is 24bit - 127LSBs. Assuming that 127LSB is a around 7bits, that means 24bits - 7bits then the AD7760 is linear to 17bits.

Regards,

Jonathan