Datasheet

M32C/87 Group (M32C/87, M32C/87A, M32C/87B) 5. Electrical Characteristics
REJ03B0127-0151 Rev.1.51 Jul 31, 2008
Page 72 of 85
Table 5.34 A/D Conversion Characteristics
(VCC1 = VCC2 = AVCC = VREF = 3.0 to 3.6 V, VSS = AVSS = 0 V, Topr = -20 to 85°C,
f(CPU) = 24MHz unless otherwise specified)
NOTES:
1. The value when φAD frequency is at 10 MHz. Keep φAD frequency at 10 MHz or lower.
If f(CPU) (=fAD) is 24 MHz, divide f(CPU) by 3 to make it 8 MHz. The conversion time in this case is 6.1 μs.
2. Sample and hold function is not available.
Table 5.35 D/A Conversion Characteristics
(VCC1 = VCC2 = VREF = 3.0 to 3.6 V, VSS = AVSS = 0 V, Topr = -20 to 85°C,
f(CPU) = 24MHz unless otherwise specified)
NOTE:
1. Measurement when one D/A converter is used, and the DAi register (i = 0, 1) of the unused D/A converter is set
to 00h. The current flown into the resistor ladder in the A/D converter is excluded. IVREF flows even if VCUT
bit in the AD0CON1 register is set to 0 (VREF not connected)
Symbol Parameter Measurement Condition
Standard
Unit
Min. Typ. Max.
− Resolution VREF = VCC1 10 Bits
INL Integral nonlinearity error (8-bit) VREF = VCC1 = VCC2 = 3.3 V ±2 LSB
DNL Differential nonlinearity error (8-bit) ±1 LSB
− Offset error (8-bit) ±2 LSB
− Gain error (8-bit) ±2 LSB
RLADDER Resistor ladder VREF = VCC1 8 40 kΩ
tCONV 8-bit conversion time
(1)(2)
4.9 μs
VREF Reference voltage 3 VCC1 V
VIA Analog input voltage 0 VREF V
Symbol Parameter Measurement Condition
Standard
Unit
Min. Typ. Max.
− Resolution 8Bits
− Absolute accuracy 1.0 %
tsu Setup time 3 μs
RO Output resistance 4 10 20 kΩ
IVREF Reference power supply
input current
(note 1)
1.0 mA
VCC1 = VCC2 = 3.3 V