RX220_15 Datasheet, PDF (85/107 Pages) Renesas Technology Corp – Renesas MCUs

RX220 Group
5. Electrical Characteristics
5.4 A/D Conversion Characteristics
Table 5.31 A/D Conversion Characteristics (1)
Conditions: VCC = AVCC0 = 2.7 to 5.5 V, 2.7 ≤ VREFH0 ≤ 5.5 V, AVCC0 – 0.9 V ≤ VREFH0 ≤ AVCC0,
VSS = AVSS0 = VREFL0 = 0 V, T_a = –40 to +105°C
Item
Min.
Typ.
Max.
Unit
Test Conditions
A/D conversion clock frequency (fPCLKD)
1
—
32
MHz
Resolution
—
—
12
Bit
Conversion time*¹ Permissible signal source
1.56
—
—
µs
Sampling in 20 states
(Operation at
impedance (Max.) = 1 kΩ
(0.652)*²
fPCLKD = 32 MHz) _{Permissible signal source}
3.29
—
—
Sampling in 75 states
impedance (Max.) = 5 kΩ
(2.35)*²
Analog input capacitance
—
—
30
pF
Offset error
—
±0.5
±4.5
LSB High-precision channel
±7.5
Normal-precision channel
Full-scale error
—
±0.75
±4.5
LSB High-precision channel
±7.5
Normal-precision channel
Quantization error
—
±0.5
—
LSB
Absolute accuracy
—
±1.25
±5.0
LSB High-precision channel
—
±1.25
±8.0
LSB Normal-precision channel
DNL differential nonlinearity error
—
±1.0
—
LSB
INL integral nonlinearity error
—
±1.0
±3.0
LSB High-precision channel
—
±1.0
±5.0
LSB Normal-precision channel
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 nonlinearity error, and INL integral nonlinearity 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.
Note 2. The value in parentheses indicates the sampling time.
Table 5.32 Channel Classification for A/D Converter
Classification
High-precision channel
Normal-precision channel
AN000 to AN007
AN008 to AN015
Channel
It is disallowed to use pins AN000 to
AN007 as digital outputs when the A/D
converter is used.
Table 5.33 A/D Internal Reference Voltage Characteristics
Conditions: VCC = AVCC0 = 1.62 to 5.5 V, VSS = AVSS0 = VREFL0 = 0 V, T_a = 40 to +105
Item
Min.
Typ.
Max.
Unit
A/D internal reference voltage
1.35
1.50
1.65
V
Test Conditions
R01DS0130EJ0110 Rev.1.10
Dec 20, 2013
Page 85 of 105