MSM586 datasheet(23/24 Pages) OKI

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¡ Semiconductor

MSM66585/586/587/P587/Q587

Definition of terms

• Resolution

Resolution is the minimum input analog value that can be resolved. With 8 bits, 28=256 so

resolution can be to (VREF-AGND) ÷ 256.

• Linearity error

Linearity error is the difference between actual conversion characteristics and ideal

conversion characteristics of an 8-bit A/D converter (so this does not include quantization

error).

Ideal conversion characteristics would be to divide the voltage between VREF and AGND

into 256 equal steps.

• Differential linearity error

Differential linearity error indicates slope of conversion characteristics. The change in

analog input voltage value that would change the digital output by one bit is ideally 1 LSB

= (VREF-AGND) ÷ 256, so differential linearity error is the difference between this ideal bit

size and the actual bit size anywhere in the conversion range.

• Zero scale error

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

conversion characteristics at the point where digital output switches from 00H to 01H.

• Full scale error

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

conversion characteristics at the point where digital output switches from FEH to FFH.

MSM586 データシート(PDF) 23 Page - OKI electronic componets