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92
MB90650A Series
5. A/D Converter Electrical Characteristics
(MB90652A/653A/654A: V
CC
= 2.2 V to 3.3V, V
SS
= AV
SS
=0.0V, 2.7 V
≤
AVRH – AVRL, T
A
= –40
°
C to +85
°
C)
(MB90F654A: V
CC
= 2.4 V to 3.6 V, V
SS
= AV
SS
= 0.0 V, 2.7 V
≤
AVRH – AVRL, T
A
= –40
°
C to +85
°
C)
(MB90P653A: V
CC
= 2.7 V to 3.3 V, V
SS
= AV
SS
= 0.0 V, 2.7 V
≤
AVRH – AVRL, T
A
= –40
°
C to +85
°
C)
*1: For a 16 MHz machine clock
*2: For an 8 MHz machine clock
*3: The current when the A/D converter is not operating or the CPU is in stop mode (for V
CC
= AV
CC
= AVRH = 3.0 V).
Notes: The error increases proportionally as |AVRH – AVRL| decreases.
The output impedance of the external circuits connected to the analog inputs should be in the following
range.
The output impedance of the external circuit should be less than approximately 7 k
.
When using an external capacitor, it is recommended to have several thousand times the capacitance of
the internal capacitor as a guid, if one takes into consideration the effect of the divided capacitance between
the external capacitor and the internal capacitor.
If the output impedance of the external circuit is too high, the sampling time might be insufficient (sampling
time = 3.75
μ
s at a machine clock of 16 MHz).
V
CC
= V
CC
1 = V
CC
2
(Continued)
Parameter
Symbol
Pin name
Value
Typ.
10
—
—
—
—
AVRL
+ 0.5 LSB
AVRH
– 1.5 LSB
—
—
Unit
Remarks
Min.
—
—
—
—
—
AVRL
– 1.5 LSB
AVRH
– 4.5 LSB
6.125
*1
12.25
*2
Max.
10
±
3.0
±
2.0
±
1.9
±
1.5
AVRL
+ 2.5 LSB
AVRH
+ 0.5 LSB
—
—
Resolution
Total error
Linearity error
—
—
—
—
—
—
bit
LSB
LSB
LSB
LSB
Differential
linearity error
—
—
MASK/FLASH
MB90P653A
Zero transition
voltage
Full scale
transition voltage
V
OT
AN0 to AN7
mV
V
FST
AN0 to AN7
mV
Conversion time
—
—
μ
s
μ
s
MASK/FLASH
MB90P653A
Analog port input
current
Analog input
voltage
I
AIN
AN0 to AN7
—
0.1
10
μ
A
V
AIN
AN0 to AN7
AVRL
—
AVRH
V
Reference voltage
—
AVRH
AVRL + 2.7
—
AV
CC
AVRH –
2.7
—
5
*3
—
5
*3
V
AVRL
0
—
V
Power supply
current
I
A
I
AH
I
R
I
RH
AV
CC
AV
CC
AVRH
AVRH
—
—
—
—
3
—
200
—
mA
μ
A
μ
A
μ
A
Reference voltage
supply current
Variation between
channels
—
AN0 to AN7
—
—
4
LSB