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7477 Datasheet(PDF) 222 Page - Renesas Technology Corp

Part # 7477
Description  8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES
PDF  361 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7477 Datasheet(HTML) 222 Page - Renesas Technology Corp

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7470/7471/7477/7478 GROUP USER’S MANUAL
HARDWARE
1.21 Electrical characteristics
1-215
(2) Absolute precision
Figure 1.21.19 to Figure 1.21.23 show the A-D conversion standard characteristics on the absolute
precision of the 7470/7471/7477/7478 group.
In the graph, the lower line indicates a deviation from the ideal value at the point where the output
code changes, namely, absolute precision error (ERROR). For example, in Figure 1.21.17, the change
of “3F16 to 4016” of the output code occurs ideally at the point of IN0 = 762 mV. However, since the
absolute precision error is -8.4 mV, “762 - 8.4 = 753.6 mV” represents the measuring change point.
In the graph, the upper line indicates an input voltage with (1 LSB WIDTH) in which the output code
is the same. For example, since the measured value of input voltage width, when the output code
is “3F16”, is 10.8 mV, the differential nonlinear error represents “10.8 - 12 = -1.2 mV (-0.1 LSB)”.
Fig. 1.21.19 A-D conversion standard characteristics, absolute precision error (1)



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