PEDL66577-01

1Semiconductor

MSM66577 Family

31/34

Measurement Circuit 2

Definition of Terminology

1. Resolution

Resolution is the value of minimum discernible analog input.

With 10 bits, since 2

2. Linearity error

Linearity error is the difference between ideal conversion characteristics and actual conversion

characteristics of a 10-bit A/D converter (not including quantization error).

Ideal conversion characteristics can be obtained by dividing the voltage between V

equal steps.

3. Differential linearity error

Differential linearity error indicates the smoothness of conversion characteristics. Ideally, the range of analog

input voltage that corresponds to 1 converted bit of digital output is 1LSB = (V

Differential error is the difference between this ideal bit size and bit size of an arbitrary point in the conversion

range.

4. Zero scale error

Zero scale error is the difference between ideal conversion characteristics and actual conversion characteristics

at the point where the digital output changes from 000H to 001H.

5. Full-scale error

Full-scale error is the difference between ideal conversion characteristics and actual conversion characteristics

at the point where the digital output changes from 3FEH to 3FFH.

–

+

Analog input

5 k

Ω

0.1

µF

AI0

AI1

AI7

Cross talk is the difference

between the A/D conversion

results when the same

analog input is applied to AI0

through AI7 and the A/D

conversion results of the

circuit to the left.

to

V