M38B53M4-059FP datasheet(261/355 Pages) MITSUBISHI

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38B5 Group User's Manual

APPENDIX

3-13

3.2 Standard characteristics

3.2.3 A-D conversion standard characteristics

Figure 3.2.11 shows the A-D conversion standard characteristics.

The lower line on the graph indicates the absolute precision error. It expresses the deviation from the ideal

value. For example, the conversion of output code from 0016 to 0116 occurs ideally at the point of AN0 =

2.5 mV, but the measured value is –2 mV. Accordingly, the measured point of conversion is defined as “2.5

– 2 = 0.5 mV”.

The upper line on the graph indicates the width of input voltages equivalent to output codes. For example,

the measured width of the input voltage for output code 6016 is 6 mV, so that the differential nonlinear error

is defined as “6 – 5 = 1 mV (0.2 LSB)”.

Fig. 3.2.11 A-D conversion standard characteristics

-5

-10

-15

STEP No.

016

112128144160176192208224240256

0.0

5.0

10.0

15.0

-5

-10

-15

STEP No.

256

0.0

5.0

10.0

15.0

272288304320336352368384400416432448464480496512

-5

-10

-15

STEP No.

512

0.0

5.0

10.0

15.0

528544560576592606624640656

672688704720736752768

-5

-10

-15

STEP No.

768

0.0

5.0

10.0

15.0

78480081683284886488089691292894496097699210081024

38B5 GROUP A-D CONVERTER ERROR & STEP WIDTH MEASUREMENT

VCC = 5.12 [V], VREF = 5.12 [V], AN0

XIN = 4 [MHz], Temp = 25 [deg.]

ERROR (Absolute precision error)

1 LSB WIDTH

M38B53M4-059FP Datasheet(PDF) 261 Page - Mitsubishi Electric Semiconductor

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