Other Parts Discussed in Thread: MSP-TS430PEU128
Hi,
Thank you as always!
I am currently writing code to improve the accuracy of a 24-bit ΔΣ ADC.
Currently I am looking at the output of AD conversion using the Resource Explorer sample code msp430f677xA_sd24b_06.c.
Currently, supply voltage = 3.3V, referenc voltage = 1.25V (external), input voltage = 1.0V are input.
With almost no changes to the program, we were able to achieve performance with approximately 14 bits or less. However, it does not perform as well as described.
I have a question here.
・What code should I use to increase the OSR to 1024? I set SD24BOSRx to OSR=9, but the result is 27 times the usual value? It has risen to about.
・What code is used to perform AD conversion? Is this done with SD24BISR? I can't see the inside of SD24BISR from this program and it's confusing.
・I wanted to use IQmathlib, so I got the library and included it, but how should I write this program for AD conversion?
MSP430 IQmathLib Users Guide version 01.10.00.05 User's Guide
I read it, but I didn't know how to use it.
I am using MSP-TS430PEU128 and inserting a pin header to input the voltage. The 3.3V power supply voltage is also input externally.
I would appreciate it if you could let me know if you have any other ideas that could improve accuracy.
I would appreciate it if you could give me some advice since I am ignorant.
Thank you.
Toshiharu