7480 datasheet(213/337 Pages) RENESAS

Part #	7480

Description	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 7470 SERIES

PDF	337 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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213 / 337 page

7480 Group and 7481 Group User's Manual

1-196

HARDWARE

1.21 Electrical Characteristics

1.21.5 Typical Characteristics of A-D Conversion

Figures 1.21.13 and 1.21.14 show typical characteristics of A-D conversion of the 7480 Group and 7481

Group in different measurement conditions.

The bottom line in each graph shows an absolute accuracy error (ERROR), indicating offset from the ideal

value at the point where an output code changes.

For example, a ‘3F16

→4016’ change in an output code ideally takes place at the point where IN0 = 1270mV,

in Figure 1.21.13.

However, 1270–1 = 1269 mV is obtained as the measured changing point, because the absolute accuracy

error is –1 mV.

The top line in each graph represents the width of input voltages that have the same output code in 1-LSB

WIDTH.

For example, ‘21–20 = 1 mV (0.05 LSB)’ is obtained as the differential non-linear error because the

measurement value of the width of input voltages whose output codes are ‘3F16’, is 21 mV.

7480 Datasheet(PDF) 213 Page - Renesas Technology Corp