R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 1072

• Manufacturer Part Number: R0K572030S000BE
• Description: KIT DEV FOR SH7203
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: MCUr

Specifications of R0K572030S000BE

• Contents: CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
• Silicon Manufacturer: Renesas
• Kit Contents: Board
• Silicon Family Name: SH7203
• Silicon Core Number: R5S72030W200FP
• Tool / Board Applications: General Purpose MCU, MPU, DSP, DSC
• Mcu Supported Families: SH7203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: SH7203
• Lead Free Status / Rohs Status: Compliant

Section 20 A/D Converter (ADC)
20.6
The A/D converter compares an analog value input from an analog input channel with its analog
reference value and converts it to 10-bit digital data. The absolute accuracy of this A/D conversion
is the deviation between the input analog value and the output digital value. It includes the
following errors:
• Offset error
• Full-scale error
• Quantization error
• Nonlinearity error
These four error quantities are explained below with reference to figure 20.7. In the figure, the 10-
bit A/D converter is illustrated as the 3-bit A/D converter for explanation. Offset error is the
deviation between actual and ideal A/D conversion characteristics when the digital output value
changes from the minimum (zero voltage) B'0000000000 (000 in the figure) to B'000000001 (001
in the figure) (figure 20.7, item (1)). Full-scale error is the deviation between actual and ideal A/D
conversion characteristics when the digital output value changes from B'1111111110 (110 in the
figure) to the maximum B'1111111111 (111 in the figure) (figure 20.7, item (2)). Quantization
error is the intrinsic error of the A/D converter and is expressed as 1/2 LSB (figure 20.7, item (3)).
Nonlinearity error is the deviation between actual and ideal A/D conversion characteristics
between zero voltage and full-scale voltage (figure 20.7, item (4)). Note that it does not include
offset, full-scale, or quantization error.
Rev. 3.00 Sep. 28, 2009 Page 1040 of 1650
REJ09B0313-0300
Digital output
[Legend]
FS: Full-scale voltage
111
110
101
100
011
010
001
000
0
1024
Definitions of A/D Conversion Accuracy
1
1024
2
characteristic
Figure 20.7 Definitions of A/D Conversion Accuracy
conversion
(3) Quantization
Ideal A/D
error
1022
1024
1023
1024
Analog input
voltage
FS
Digital output
characteristic
conversion
(1) Offset error
Ideal A/D
Actual A/D
convertion
characteristic
(4) Nonlinearity
(2) Full-scale error
error
Analog input
voltage
FS