SH7760 Datasheet, PDF (1081/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

Digital output
111
110
101
Ideal A/D
conversion
characteristic
Digital output
Ideal A/D
conversion
characteristic
(2) Full-scale error
100
011
010
(3) Quantization
error
001
000
0
1/8 2/8 3/8 4/8 5/8 6/8 7/8 FS
Analog input
voltage
FS: Full-scale voltage
(4) Nonlinearity
error
Actual A/D
convertion
characteristic
(1) Offset error
FS
Analog input
voltage
Figure 29.7 Definitions of A/D Conversion Accuracy
29.7 Usage Notes
When using the A/D converter, note the points listed below.
29.7.1 Setting Analog Input Voltage
1. Analog input voltage range
During A/D conversion, the voltages input to the analog input pins ANn should be in the range
AV_SS_ADC ≤ ANn ≤ AV_CC_ADC (n = 0 to 3).
2. AV_CC_ADC and AV_SS_ADC input voltages
AV_CC_ADC, AV_SS_ADC, and V_SS should be related as follows: AV_CC_ADC = 3.3 V ± 0.3 V
and AV_SS_ADC = V_SS. (AV_CC_ADC = Analog power supply, AV_SS_ADC = Analog ground, V_SS
= Internal digital power supply)
Rev. 1.0, 02/03, page 1031 of 1294