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LMP91000EVM for Cyclic Voltammetry Scan Rate

Wen Yan Tan
Prodigy 20 points
Other Parts Discussed in Thread: LMP91000EVM

Hi,


I am working on a project where I am required to use LMP91000EVM to perform Cyclic Voltammetry with Arduino. I have read the datasheet regarding the Reference Control Register.

There is a selection of 0, 1, 2, 4,..., 24% of bias voltage. My project is using 3.3V as voltage source. I have seen people using scan rate of 66mV/s, meaning that the percentage of bias voltage is set at 2%. So let's say the applied potential sweep start from 0V, then will it goes to 66mV, 132mV, 198mV and reaches 792mV (24% of 3.3V) ? Does it work like the percentage of bias voltage is fixed at 2% for every applied potential sweep or you have to actually change it from 2% until 24%?

Also, is it possible to use a scan rate of say, 50mV/s or 33mV/s? How am I supposed to have more option of scan rate instead of only 66mV/s?


Thanks.