Ive got a circuit that accurately reads low volts like in the millivolt range. I accumulate 256 readings and divide by 4 to get a 16 bit result. This works well when the gain stage is enabled because noise is amplified and the 256 readings gives a resolution thats not possible with just 10 bits. Switching off the gain stage loses the averaging effect of the 256 readings. Using the 2.56 reference, the result increments in large chunks. If I could add some noise to the circuit the reading could be improved.
Have any of you ever done this before or seen a project that did this?
Any kind of noise or oscillation might work, so long as it can be turned off for gain stage readings.
This is going to be an academy project for a tiny26 multimeter and a good reference for anyone needing precise adc readings.