Hello,
I have to consider MSP430I2020 controller for ongoing project. it has built in 24 bit ADC, this is the reason that why i'm using this controller. actually my project is based on weight scaling. so i want to interface my load cell 300kg(capacity) with this controller.
Load cell gives 2mv at full load, excitation voltage is 5V, so maximum output voltage of load cell at full load is 10mV, i use internal reference voltage for ADC that is max 1.7V.
I have to connect amplifier between load cell and controller that can amplify load cell output from 10mv to 1.2v so ADC pin can easily sense this voltage.
For the confirmation, is it ok??
1. 2^24 = 16777216 step size
2. 1.2/16777216 = 0.000000072 V per step size.
Question: what is the minimum sensitivity of ADC. is ADC can sense 0.000000072 V?
Any external RC anti-aliasing filter circuit is required for ADC, if possible then please share a reference schematic for ADC filter circuit.
Thank you