Datasheet

R8C/36C Group 5. Electrical Characteristics
R01DS0018EJ0110 Rev.1.10 Page 33 of 59
Nov 02, 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 ——10Bit
— 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—20MHz
3.2 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2—16MHz
2.7 V ≤ V
ref = AVCC ≤ 5.5 V
(2)
2—10MHz
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 = 5.0 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