Datasheet

R01DS0190EJ0100 Rev.1.00 Page 88 of 107
Jun 19, 2013
RX111 Group 5. Electrical Characteristics
5.5 A/D Conversion Characteristics
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.
Figure 5.49 AVCC to AVREFH Voltage Range
Table 5.36 A/D Conversion Characteristics (1)
Conditions: VCC = AVCC0 = VREFH0 = 2.7 to 3.6 V, VSS = AVSS0 = VREFL0 = VSS_USB = 0 V, PCLKD = 4 to 32 MHz,
T
a
= –40 to +105°C
Item Min. Typ. Max. Unit Test Conditions
Resolution
——12Bit
Conversion time*
1
(Operation at
PCLKD = 32 MHz)
Permissible signal source
impedance (Max.) = 0.3 kΩ
1.031
(0.313)*
2
——µs
High-precision channel
ADCSR.ADHSC bit = 1
ADSSTRn.SST[7:0] bits = 09h
1.375
(0.641)*
2
——
Normal-precision channel
ADCSR.ADHSC bit = 1
ADSSTRn.SST[7:0] bits = 14h
Offset error
— ±0.5 ±4.5 LSB
High-precision channel
PJ6PFS.ASEL bit = 1
PJ7PFS.ASEL bit = 1
±6.0 LSB
Other than above
Full-scale error
— ±0.75 ±4.5 LSB
High-precision channel
PJ6PFS.ASEL bit = 1
PJ7PFS.ASEL bit = 1
±6.0 LSB
Other than above
Quantization error
— ±0.5 — LSB
Absolute accuracy
— ±1.25 ±5.0 LSB
High-precision channel
PJ6PFS.ASEL bit = 1
PJ7PFS.ASEL bit = 1
±8.0 LSB
Other than above
DNL differential nonlinearity error
— ±1.0 — LSB
INL integral nonlinearity error
— ±1.0 ±3.0 LSB
1.0 2.0 3.0 4.0 5.0
AVCC
1.0
2.0
3.0
4.0
5.0
AVREFH0
Characteristics listed in
Table 36.36
A/D Conversion
Characteristics (1)
Characteristics listed in
Table 36.37
A/D Conversion
Characteristics (2)
Characteristics listed in
Table 36.38
A/D Conversion
Characteristics (3)
1.8
1.8
2.7
3.6
2.4
2.4
2.7
3.6