RX230 Datasheet, PDF (146/177 Pages) Renesas Technology Corp – 54-MHz 32-bit RX MCUs, built-in FPU, 88.56 DMIPS, up to 512-KB flash memory

RX230 Group, RX231 Group
5. Electrical Characteristics
Table 5.49 A/D Conversion Characteristics (5)
Conditions: 1.8V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5V, 1.8V ≤ VREFH0 ≤ AVCC0, VSS = AVSS0 = VSS_USB = 0V,
reference voltage = VREFH0 selected, Ta = –40 to +105°C
Frequency
Resolution
Conversion time*¹
(Operation at
PCLKD = 8 MHz)
Item
Permissible signal
source impedance
(Max.) = 5 kΩ
Min.
1
—
6.75
10.13
Typ.
—
—
—
—
Max.
8
12
—
—
Analog input capacitance Cs
Analog input resistance
Rs
Offset error
Full-scale error
Quantization error
Absolute accuracy
DNL differential non-linearity error
INL integral non-linearity error
—
—
15
—
—
2.5
—
±1
±7.5
—
±1.5
±7.5
—
±0.5
—
—
±3.0
±8.0
—
±1.0
—
—
±1.25
±3.0
Unit
MHz
Bit
μs
pF
kΩ
LSB
LSB
LSB
LSB
LSB
LSB
Test Conditions
High-precision channel
The ADCSR.ADHSC bit is 1
The ADSSTRn register is 0Dh
Normal-precision channel
The ADCSR.ADHSC bit is 1
The ADSSTRn register is 28h
Pin capacitance included
Figure 5.67
Figure 5.67
Note: The characteristics apply when no pin functions other than A/D converter input are used. Absolute accuracy includes
quantization errors. Offset error, full-scale error, DNL differential non-linearity error, and INL integral non-linearity error do not
include quantization errors.
Note 1. The conversion time is the sum of the sampling time and the comparison time. As the test conditions, the number of sampling
states is indicated.
Table 5.50 A/D Converter Channel Classification
Classification
Channel
Conditions
Remarks
High-precision channel
Normal-precision channel
AN000 to AN007
AN016 to AN031
AVCC0 = 1.8 to 5.5 V Pins AN000 to AN007 cannot be used as digital
outputs when the A/D converter is in use.
Internal reference voltage input
channel
Internal reference
voltage
Temperature sensor input channel Temperature sensor
output
AVCC0 = 2.0 to 5.5 V
AVCC0 = 2.0 to 5.5 V
MCU
R0
Figure 5.67 Equivalent Circuit
R01DS0261EJ0110 Rev.1.10
Oct 30, 2015
Rs
12b - ADC
Cs
Page 146 of 177