Datasheet

R01DS0098EJ0180 Rev.1.80 Page 182 of 208
May 13, 2014
RX63N Group, RX631 Group 5. Electrical Characteristics
5.5 A/D Conversion Characteristics
Note: The above specification values apply when there is no access to the external bus during A/D conversion. If access proceeds
during A/D conversion, values may not fall within the above ranges.
Note 1. The conversion time includes the sampling time and the comparison time. As the test conditions, the number of sampling states
is indicated.
Note 2. The scanning is not supported.
Note 3. The value in parentheses indicates the sampling time.
Table 5.28 10-Bit A/D Conversion Characteristics
Conditions: VCC = AVCC0 = VREFH = VCC_USB = 2.7 to 3.6 V, VREFH0 = 2.7 V to AVCC0
VSS = AVSS0 = VREFL/VREFL0 = VSS_USB = 0 V
PCLK = 8 to 50 MHz
T
a
= T
opr
Item Min. Typ. Max. Unit
Test
Conditions
Resolution — — 10 Bit
Conversion
time*
1
(Operation at
PCLK = 50
MHz)
With 0.1-µF
external
capacitor
When the capacitor is charged enough*
2
3.0 (2.5)*
3
— — µs Sampling
in 125
states
Without 0.1-µF
external
capacitor
Permissible signal source
impedance (max.) = 1.0 kΩ, VCC
 3.0 V
1.5 (1.0)*
3
— — Sampling
in 50
states
Permissible signal source
impedance (max.) = 1.0 kΩ, VCC
 2.7 V
3.5 (3.0)*
3
— — Sampling
in 150
states
Permissible signal source
impedance (max.) = 5.0 kΩ, VCC
 3.0 V
2.0 (1.5)*
3
— — Sampling
in 75
states
Permissible signal source
impedance (max.) = 5.0 kΩ, VCC
 2.7 V
4.0 (3.5)*
3
— — Sampling
in 175
states
Analog input capacitance — — 6.0 pF
Offset error — ±1.5 ±3.0 LSB
Full-scale error — ±1.5 ±3.0 LSB
Quantization error — ±0.5 — LSB
Absolute accuracy — ±1.5 ±3.0 LSB
DNL differential nonlinearity error — ±0.5 ±1.0 LSB
INL integral nonlinearity error — ±1.5 ±3.0 LSB