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¡ Semiconductor MSM66201/66P201/66207/66P207

Absolute error (E

)

The absolute error indicates a difference between actual conversion and ideal conversion,

excluding a quantizing error. The absolute error of the A/D converter gets larger as it

approaches the zero point or full scale. (Refer to Conversion Characteristics Diagram 1.)

Relative error (E

)

The relative error indicates a deviation from a line which connects the center point of the zero

point conversion width with that of the full scale conversion width, excluding a quantizing

error.

The relative error of this A/D converter is almost due to a differential linearity error.

Zero point error (Ez) and full scale error (E

)

The zero point error and full scale error indicate a difference between actual conversion and

ideal conversion at the zero point and full scale, respectively. (Refer to Conversion

Characteristics Diagram 1.)

A/D Converter Conversion Characteristics 2 (temperature characteristics)

Conversion Characteristics Conversion Characteristics

Diagram 2-1 Diagram 2-2

Differential linearity error (E

)

The differential linearity error indicates a difference between the actual conversion width

(actual step width) and ideal value (1LSB).

With this A/D converter, a voltage for actual conversion is shifted and the inclination of a

voltage is changed, with changes of temperature (see Conversion Characteristics Diagram 2-

1). Specifications described in the foregoing tables are established from Eta shown in

Conversion Characteristics Diagram 2-1 (E

=Eta–1LSB). Conversion Characteristics Diagram

2-2 shows temperature characteristics of differential linearity of Es in Conversion Characteristics

Diagram 2-1.

3FF

[HEX]

000

Eta [V]

–40°C

+25°C

+85°C

[LSB]

Temparature Ta

–40 +85

During normal

operation

During HALT

Conversion

Code

Analog Input

Differential

Linearity

[°C]

1 2 ... 21 22 23 24 25 26 27 28 29 30 31

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Oki MSM66P201 User Manual Page 26

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