
52
38C1 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINAR
Y
Notice:
This
is not
a final
specification.
Some
parametric
limits
are
subject
to change.
A-D Converter Characteristics
Table 17 A-D converter recommended operating condition
(Vcc = 2.0 to 5.5 V (One Time PROM version: 2.2 to 5.5 V), Ta = –20 to 85
°C, unless otherwise noted)
Power source voltage
“H” input voltage
ADKEY0–ADKEY3
“L” input voltage
ADKEY0–ADKEY3
AD converter control clock
(low-speed mode and ring
oscillator mode excluded)
Unit
V
MHz
Limits
Parameter
Min.
2.0
2.2
0.9VCC
0
Typ.
5.0
Max.
5.5
VCC
0.7VCC–0.5
20VCC–38
20VCC–26
3
40VCC–82
3
10VCC–19
8.0
Symbol
Mask ROM version
One Time PROM version
Mask ROM version
VCC
≤ 2.2 V
2.2 < VCC
≤ 2.5 V
One Time PROM version
VCC
≤ 2.5 V
2.5 < VCC
≤ 2.7 V
Mask ROM version
2.5 < VCC
≤ 5.5 V
One Time PROM version
2.7 < VCC
≤ 5.5 V
Conditions
VDD
VIH
VIL
f(XIN)
Table 18 A-D converter characteristics
(Vcc = 2.0 to 5.5 V (One Time PROM version: 2.2 to 5.5 V), Ta = –20 to 85
°C, unless otherwise noted)
Resolution
Linearity error
Differential non-linearity error
Zero transition voltage
Full-scale transition voltage
Absolute accuracy
(quantification error excluded)
Conversion time (Note)
Analog input current
Unit
BIT
LSB
mV
LSB
tc(
φAD)
A
Limits
Parameter
Min.
0
5070
2535
106
Typ.
20
10
5100
2550
Max.
8
±1
±0.9
50
25
5120
2560
±2
±5
±3
109
±5
Symbol
Ta = 25
°C, 2.5 ≤ VCC ≤ 5.5 V
Ta = 25
°C, 2.5 ≤ VCC ≤ 5.5 V
VCC = 5.12 V, Ta = 25
°C
VCC = 2.56 V, Ta = 25
°C
VCC = 5.12 V, Ta = 25
°C
VCC = 2.56 V, Ta = 25
°C
2.2
< VCC ≤ 5.5 V (2.7 < VCC ≤ 5.5 V for One Time PROM version),
f(XIN)
≤ 8.0 MHz, or low-speed or ring oscillator mode
2.2
< VCC ≤ 2.5 V (2.5 < VCC ≤ 2.7 V for One Time PROM version),
f(XIN)
≤ 2.0 MHz, or low-speed or ring oscillator mode
2.2
≤ VCC < 2.3 V for One Time PROM version
Low-speed or ring oscillator mode excluded
Condition except above
Test conditions
—
LIN
DIF
V0T
VFST
ABS
Tconv
IIA
Note: The operation clock is XIN in the middle- or high-speed mode, or the ring oscillator in the other modes.
When the A-D conversion is executed in the middle- or high-speed mode, set f(XIN)
≥ 500 kHz.
tc(
φAD): One cycle of control clock for A-D converter. XIN input is used in the middel- or high-speed mode, and ring oscillator is used in the low- or ring
oscillator mode for the control clock.