RX24U Datasheet, PDF (109/131 Pages) Renesas Technology Corp – 32-bit RXv2 CPU core

RX24U Group
5. Electrical Characteristics
Table 5.31 A/D Conversion Characteristics (2)
Conditions: VCC = 2.7 V to 5.5 V, AVCC0 = AVCC1 = AVCC2 = VREFH0 = VREFH1 = VREFH2 = VCC to 5.5 V,
VSS = AVSS0 = AVSS1 = AVSS2 = VREFL0 = VREFL1 = VREFL2 = 0 V, T_a = –40 to +85°C
Item
Min.
Typ.
Max.
Unit
Test Conditions
Frequency
1
—
40
MHz
Resolution
—
—
12
Bit
Conversion time*¹
Permissible signal
1.15
—
—
μs
High-precision channel
(Operation at
source impedance
ADSSTRn.SST[7:0] bits = 0Eh
PCLKD = 40 MHz)
(Max.) = 1.0 kΩ
Sample-and-hold circuit
1.30
—
not in use
—
μs
Normal-precision channel
ADSSTRn.SST[7:0] bits = 14h
Permissible signal
1.90
—
—
μs
High-precision channel
source impedance
ADSSTRn.SST[7:0] bits = 0Eh
(Max.) = 1.0 kΩ
ADSHCR.SSTSH[7:0] bits = 11h
Sample-and-hold circuit
AN100 to 102 = 0.25 V to AVCC1 –
in use
0.25 V
Analog input capacitance
—
—
12
pF
Offset error
—
±2.0
±6.5
LSB
Full-scale error
—
±2.0
±6.5
LSB
Quantization error
—
±0.5
—
LSB
Absolute accuracy
—
±3.0
±8.0
LSB
DNL differential nonlinearity error
—
±0.5
±1.5
LSB
INL integral nonlinearity error
—
±1.5
±4.0
LSB
Note:
Note 1.
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.
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 5.32 A/D Converter Channel Classification
Classification
High-precision channel
Normal-precision channel
Channel
AN000 to AN003,
AN100 to AN103,
AN200 to AN211
AN016, AN116
Internal reference voltage input
channel
Internal reference
voltage
Conditions
AVCC0 = AVCC1 =
AVCC2 = 2.7 to 5.5 V
VCC = AVCC0 =
AVCC1 =AVCC2 =
2.7 to 5.5 V
AVCC0 = AVCC1 =
AVCC2 = 2.7 to 5.5 V
Remarks
Table 5.33 A/D Internal Reference Voltage Characteristics
Conditions: VCC = 2.7 V to 5.5 V, AVCC0 = AVCC1 = AVCC2 = VREFH0 = VREFH1 = VREFH2 = VCC to 5.5 V,
VSS = AVSS0 = AVSS1 = AVSS2 = VREFL0 = VREFL1 = VREFL2 = 0 V, T_a = –40 to +85°C
Item
Min.
Typ.
Max.
Unit
Test Conditions
Internal reference voltage input channel*¹
1.35
1.43
1.50
V
Note 1. The A/D internal reference voltage indicates the voltage when the internal reference voltage is input to the A/D converter.
R01DS0278EJ0100 Rev.1.00
Mar 31, 2017
Page 109 of 131