Part Number: LDC1312
Hi Team,
The application note (SNOA945) shows the following.
--------------------------------------------------------------------------------------
(page 3)
2.4 Resolution as a Function of Sensor Frequency
The effective resolution also varies based on the sensor frequency. At higher sensor frequencies, the LDC
will appear to having missing codes, where the gaps between subsequent output codes will become larger
and larger as the sensor frequency increases. This is why the effective resolution drops off as the sensor
frequency increases. Note that set of output codes is a function of the value of RCOUNT – a different
value for RCOUNT will produce a different set of output codes.
At low sensor frequencies, the LDC output code will increment by 1 code as the sensor frequency
increases, as expected. However, as the frequency increases further, then the output code will start
skipping 1 code, then skipping several codes, and then gap between output codes will become larger and
larger.
http://www.tij.co.jp/jp/lit/an/snoa945/snoa945.pdf
--------------------------------------------------------------------------------------
Is there any criteria for "higher sensor frequency"?
Does it indicate the missing codes could be occured even if sensor frequency is less than 10MHz (max range of LDC1312)?
I believe higher sensor frequency achieves higher resolution so want to set higher sensor frequency as far as possible.
Best Regards,
Yaita / Japan disty
