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Hi Team,
There is external 40-MHz oscillator on LDC1312EVM.
Should we divide more than 2 if using single channel operation because of the following Table 1?
I would like to ask what is concern if we use fREFx=40MHz when single channel operation.
Best Regards,
Yaita / Japan disty
Hi Luke-san,
Thank you always for your support.
>However, if you are using both channels then you can safely operate at 40MHz.
Should I set external coil and capacitor at unused channel that is just enabled for 40MHz operation?
I saw the following application note and it seems external coil and capacitor are required but would like to confirm just in case.
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(page 5)
If the Channel 0 activation time (which is roughly Q/fSENSOR) is short enough, it may be advantageous to
attach an additional sensor onto channel 1 but ignore the conversion data from Channel 1. In this way the
LDC131x can operate with fREF=40 MHz, but at the cost of conversion time on the second channel. The
sensor geometries do not need to match Channel 0’s sensor.
http://www.tij.co.jp/jp/lit/an/snoa945/snoa945.pdf
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Best Regards,
Yaita / Japan disty
Hi Luke-san,
Thank you for your reply.
Could you tell me the background why valid sensor(LC tank) required although it is unused?
Best Regards,
Yaita