58. Resolution and quantization unit of A/D, D/A converter(LSB)

It shows the relation of quantization unit (LSB) for the resolution of A/D, D/A converter and full-scale voltage.

Resolution ( N ) Stage ( 2N ) Voltage value for each Stage
(In case of 10VFS)
%FS dBFS

2 bits

4

2.5V

25

-12

4 bits

16

0.625V(625mV)

6.25

-24

6 bits

64

0.156V(156mV)

1.56

-36

8 bits

256

0.0391V(39.1mV)

0.39

-48

10 bits

1,024

0.00977V(9.77mV)

0.098

-60

12 bits

4,096

0.00244V(2.44mV)

0.024

-72

14 bits

16,384

0.000610V(610 μ V)

0.0061

-84

16 bits

65,536

0.000153V(153 μ V)

0.0015

-96

18 bits

262,144

0.000038V(38 μ V)

0.0004

-108

20 bits

1,048,576

0.00000954V(9.54μ V)

0.0001

-120

22 bits

4,194,304

0.00000238V(2.38 μ V)

0.000024

-132

24 bits

16,777,216

0.000000596V(596nV)

0.000006

-144

*FS is the abbreviation of Full Scale.
*Stage is given by “2 to the power N”.
*Voltage value for each Stage is given by “FS voltage/Number of stages”.
*%FS is given by “Voltage for each Stage / FS voltage” in the percentage for the FS voltage of single stage voltage.
*DBFS is given by “20× log10 (voltage for each Stage/FS voltage)”, it is the decibel value of the voltage for each Stage based on the FS voltage.