RX21A_15 Datasheet, PDF (108/132 Pages) Renesas Technology Corp – Renesas MCUs

RX21A Group
5.6 A/D Conversion Characteristics
5. Electrical Characteristics
Table 5.37 A/D Conversion Characteristics (1)
Conditions: VCC = AVCC0 = AVCCA = 2.7 to 3.6 V, VREFH0 = 2.7 V to AVCC0*³,
VSS = AVSS0 = AVSSA = VREFL = VREFL0 = VREFDSL = 0 V, fT_a = –40 to +105°C
Item
Min.
Typ.
Max.
Unit
Test Conditions
A/D conversion clock frequency (fPCLKD)
1
—
25
MHz
Resolution
—
—
10
Bit
Conversion time*¹
Permissible signal source
2.0
—
—
µs
Sampling in 25 states
(Operation at
impedance (Max.) = 1.5 kΩ (1.0)*²
fPCLKD = 25 MHz)
Analog input capacitance
—
—
5
pF
Offset error
—
±1.0
±2.0
LSB
Full-scale error
—
±1.0
±2.0
LSB
Quantization error
—
±0.5
—
LSB
Absolute accuracy*⁴
—
±1.0
±3.0
LSB
DNL differential nonlinearity error*⁴
—
±0.5
±1.0
LSB
INL integral nonlinearity error
—
±1.0
±2.0
LSB
Note: • The characteristics apply when no pin functions other than A/D converter input are used. Absolute accuracy includes
quantization errors. Offset error, fullscale 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.
Note 3. When using the temperature sensor, use it when AVCC0 = VREFH0.
Note 4. The characteristics of the channel AN4 on a 64-pin LQFP may inferior to the values on this table; ±1.5 LSB in Absolute accuracy,
±0.5 LSB in DNL differential nonlinearity error.
VREFH0
3.6
3.0
2.7
2.0
1.8
Characteristics listed
in Table 5.39
Characteristics listed
in Table 5.37
1.0
Figure 5.61
1.0
1.8 2.0
AVCC to VREFH0 Voltage Range
2.7 3.0
3.6 AVCC
R01DS0129EJ0110 Rev.1.10
Aug 28, 2014
Page 108 of 132