Zane83
New Member
Nigel Goodwin said:3V is fine as a Vref (and you can easily adjust most precision references to be 3V), but you were talking about mV levels before - do have any idea what the levels are going to be?.
I'm sorry if i'd missed out any info before this. The mV i was talking about is the sensitivity as before this i'd made an experiment and obtained the result that the sensitivity of the load cell (different model) is around 0.1mV/kg.
Nigel Goodwin said:Sorry, what has sleep mode got to do with anything? - that's only to reduce power consumption when it's not being used, it won't improve conversion in any way.
From what i read from the Microchip datasheet and some other manual (Section 17.22), "SLEEP and IDLE modes are useful for minimizing conversion noise because the igital activity of the CPU, buses and other peripherals is minimized."
And in Section 17.25 Design Tips
3. Put the device into SLEEP mode before the start of the A/D conversion. The RC clock source selection is required for conversions in SLEEP mode. This technique increases accuracy because digital noise from the CPU and other peripherals is minimized.
Zane
I'm learning to fish, but it takes patient...