RX24U Datasheet, PDF (108/131 Pages) Renesas Technology Corp – 32-bit RXv2 CPU core

RX24U Group
5.4 A/D Conversion Characteristics
5. Electrical Characteristics
Table 5.30 A/D Conversion Characteristics (1)
Conditions: VCC = 4.5 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
1.00
—
—
μs
High-precision channel
(Operation at
source impedance
ADSSTRn.SST[7:0] bits = 08h
PCLKD = 40 MHz)
(Max.) = 1.0 kΩ
Sample-and-hold circuit
1.25
—
not in use
—
μs
Normal-precision channel
ADSSTRn.SST[7:0] bits = 12h
Permissible signal
1.65
—
—
μs
High-precision channel
source impedance
ADSSTRn.SST[7:0] bits = 08h
(Max.) = 1.0 kΩ
ADSHCR.SSTSH[7:0] bits = 0Dh
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
Sample-and-hold circuit
—
in use
±2.5
±8.0
LSB AN100 to 102 = 0.25 V to AVCC1 –
0.25
Sample-and-hold circuit
—
not in use
±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.
R01DS0278EJ0100 Rev.1.00
Mar 31, 2017
Page 108 of 131