The difference between a 14-bit resolution module and a 16-bit resolution module
What is the difference between a 14-bit resolution module and a 16-bit resolution module?
The highest bit of the 14-bit module is the sign bit. We use S to indicate the sign bit. Then the value range of this module is S111 1111 1111 11XX. If the negative value is not considered, the value range is up to 32764 and the minimum is 4, that is, only the value is greater than 3. After that, it may be detected by the module. Then the 16-bit resolution module, the maximum representation is 32767, the minimum is 0, it can measure the difference to the minimum of 1. The resolution of the module comes out.
Suppose you want to measure the temperature of 0-500 degrees. If you use 16-bit module to measure, the module will linearly correspond to 0-648 to 0-27648, then the minimum value is 1* when the module only changes 1 bit. 500/27648=0.018 degrees.
The resolution resolution of the analog is the conversion accuracy of the A/D analog conversion chip. That is, how many digits are used to represent the analog quantity. That is to say, the higher the resolution, the finer the range of values ​​of the analog quantity, and the more accurate the digital value converted into. If the conversion resolution of the analog module is 12 bits, the minimum unit that can reflect the analog change is 1/4096 of full scale (2 to the power of 12), and the minimum unit of 16 bits is 1/65536 of full scale (2 16th power).
The following is an example of how to consider a device with a resolution that suits your needs in a wide variety of analog input and output devices.
For example, suppose "measure the temperature from 0 °C to 100 °C".
1: It is desirable to measure 1/100 accuracy in units of 1 °C. A device with a resolution of 8 bits (divided into 2 8th power = 256 copies) is sufficient.
2: It is desirable to measure the accuracy of 1/1000 in units of 0.1 °C. A device with a resolution of 12 bits (divided into 2 to 12 power = 4096 copies) is sufficient.
3: It is desirable to measure the accuracy of 1/10000 in units of 0.01 °C. A device with a resolution of 16 bits (divided into 2 to 16 power = 65536) is sufficient.
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