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71
MB90210 Series
5. A/D Converter Electrical Characteristics
Single-chip mode MB90214/P214B/W214B:
(AV
CC
= V
CC
= +5.0
±
10%, AV
SS
= V
SS
= 0.0 V, T
A
= –40
°
C to +105
°
C, +4.5 V
Single-chip mode MBP90214A/W214A:
(AV
CC
= V
CC
= +5.0
±
10%, AV
SS
= V
SS
= 0.0 V, T
A
= –40
°
C to +85
°
C, +4.5 V
External bus mode:
(AV
CC
= V
CC
= +5.0
±
10%, AV
SS
= V
SS
= 0.0 V, T
A
= –40
°
C to +70
°
C, +4.5 V
AVRH – AVRL)
AVRH – AVRL)
AVRH – AVRL)
* :The current value applies to the CPU stop mode with the A/D converter inactive (V
CC
= AV
CC
= AVRH = +5.5 V).
Notes:
The smaller the | AVRH – AVRL |, the greater the error would become relatively.
Use the output impedance of the external circuit for analog input under the following conditions:
External circuit output impedance < approx. 10 k
(Sampling period
Precision values are standard values applicable to sleep mode.
If V
CC
/AV
CC
or V
SS
/AV
SS
is caused by a noise to drop to below the analog input voltage, the analog input
current is likely to increase. In such cases, a bypass capacitor or the like should be provided in the external
circuit to suppress the noise.
3.75
μ
s, t
CYC
= 62.5 ns)
Parameter
Symbol
Pin name
Condition
Value
Unit
Remarks
Min.
Typ.
Max.
Resolution
n
—
—
—
—
10
bit
Total error
—
—
—
–3.0
—
+3.0
LSB
Linearity error
—
—
—
–2.0
—
+2.0
LSB
Differential
linearity error
—
—
—
—
—
±
1.5
LSB
Zero transition
voltage
V
OT
AN0 to AN7
—
AVRL – 1.5
AVRL + 0.5
AVRL + 2.5
LSB
Full-scale
transition voltage
V
FST
—
AVRH – 3.5 AVRH – 1.5 AVRH
+ 0.5
LSB
Conversion time
Sampling period
T
CONV
—
t
CYC
= 62.5 ns
6.125
—
μ
s
98 machine
cycles
T
SAMP
—
3.75
—
μ
s
60 machine
cycles
Analog port input
current
I
AIN
AN0 to AN7
—
—
—
±
0.1
μ
A
Analog input
voltage
V
AIN
—
AVRL
—
AVRH
V
Analog reference
voltage
—
AVRH
—
AVRL
—
AV
CC
V
AVRL
—
AV
SS
—
AVRH
V
μ
A
μ
A
Reference voltage
supply current
I
R
AVRH
—
—
200
500
I
RH
—
—
—
5*
Interchannel
disparity
—
AN0 to AN7
—
—
—
4
LSB
≤
≤
≤
—
—
=
..