Datasheet

R8C/35C Group 5. Electrical Characteristics
R01DS0006EJ0100 Rev 1.00 Page 30 of 54
Aug. 24, 2010
Notes:
1. V
CC/AVCC = Vref = 2.2 to 5.5 V, VSS = 0 V and Topr = −20 to 85°C (N version) / −40 to 85°C (D version), unless otherwise
specified.
2. The A/D conversion result will be undefined in wait mode, stop mode, when the flash memory stops, and in low-current-
consumption mode. Do not perform A/D conversion in these states or transition to these states during A/D conversion.
3. When the analog input voltage is over the reference voltage, the A/D conversion result will be 3FFh in 10-bit mode and FFh in
8-bit mode.
Table 5.3 A/D Converter Characteristics
Symbol Parameter Conditions
Standard
Unit
Min. Typ. Max.
− Resolution V
ref = AVCC −−10 Bit
− Absolute accuracy 10-bit mode V
ref = AVCC = 5.0 V AN0 to AN7 input,
AN8 to AN11 input
−−±3 LSB
V
ref = AVCC = 3.3 V AN0 to AN7 input,
AN8 to AN11 input
−−±5 LSB
V
ref = AVCC = 3.0 V AN0 to AN7 input,
AN8 to AN11 input
−−±5 LSB
V
ref = AVCC = 2.2 V AN0 to AN7 input,
AN8 to AN11 input
−−±5 LSB
8-bit mode V
ref = AVCC = 5.0 V AN0 to AN7 input,
AN8 to AN11 input
−−±2 LSB
V
ref = AVCC = 3.3 V AN0 to AN7 input,
AN8 to AN11 input
−−±2 LSB
V
ref = AVCC = 3.0 V AN0 to AN7 input,
AN8 to AN11 input
−−±2 LSB
V
ref = AVCC = 2.2 V AN0 to AN7 input,
AN8 to AN11 input
−−±2 LSB
φAD A/D conversion clock
4.0 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2 − 20 MHz
3.2 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2 − 16 MHz
2.7 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2 − 10 MHz
2.2 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2 − 5MHz
− Tolerance level impedance − 3 − kΩ
tCONV Conversion time 10-bit mode Vref = AVCC = 5.0 V, φAD = 20 MHz 2.2 −−µs
8-bit mode V
ref = AVCC = 5.0 V, φAD = 20 MHz 2.2 −−µs
t
SAMP Sampling time φAD = 20 MHz 0.8 −−µs
I
Vref Vref current VCC = 5 V, XIN = f1 = φAD = 20 MHz − 45 −µA
V
ref Reference voltage 2.2 − AVCC V
V
IA
Analog input voltage
(3)
0 − Vref V
OCVREF On-chip reference voltage 2 MHz ≤ φAD ≤ 4 MHz 1.19 1.34 1.49 V