Relation Between Resolution and Full Scale Range

Resolution vs Range

How many bits an ADC has (Resolution) determines how many parts it can divide the measurement range (Range) into.

Let's Explain with an Example

Suppose you have a sensor measuring between 0 and 100 kg.

• 12-Bit ADC: Divides the range into 4096 parts.
  • 100 kg / 4096 = 0.024 kg (24 grams)
  • So this system cannot see changes lighter than 24 grams.
• 24-Bit ADC (ZMA Series): Divides the range into 16.7 million parts.
  • 100 kg / 16,777,216 = 0.000005 kg (0.005 grams)
  • So it can detect even a fly landing on it.

In high-capacity tanks or precision dosing operations, the only way to maintain a high "Full Scale" range without sacrificing precision is to switch to 24-bit technology.