3806_03 Datasheet, PDF (154/223 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
3.2 Standard characteristics
3.2.4 D-A conversion standard characteristics
Figure 3.2.8 shows the D-A conversion standard characteristics. The lower-side line on the graph indicates
the absolute precision error. In this case, it represents the difference between the ideal analog output value
for an input code and the measured value.
The upper-side line on the graph indicates the change width of output analog value to a one-bit change
of input code.
D-A CONVERTER STEP WIDTH MEASUREMENT
VCC = 5.12 [ V ] , VREF = 5.12 [ V ]
XIN = 4.80 [ MHZ] , ANALOG OUTPUT DA
Temp. = 25deg.
1LSB WIDTH
30
30
20
20 +1LSB
10
10
0
0
– 10
– 20
Absolute precision error
–1LSB
– 30
0
30
8
16
24
32
40
48
56
64
72
80
88
96
104 112 120 128
STEP No.
30
20
20+1LSB
10
10
0
0
– 10
– 20
–1LSB
– 30
128 136 144 152 160 168 176 184 192 200 208 216 224 232 240 248 256
STEP No.
Measured when a power source voltage is stable in the single-chip mode and the high-speed mode
Fig. 3.2.8 D-A conversion standard characteristics
3806 GROUP USER’S MANUAL
3-29