MB90560/565 Series
68
5.
Electrical Characteristics for the A/D Converter
(T
A
=
40
°
C to
+
85
°
C, 3.0 V
≤
AVR, V
CC
=
AV
CC
=
5.0 V
±
10
%
, V
SS
=
AV
SS
=
0.0 V)
* : Current when A/D converter is not used and CPU is in stop mode (V
CC
=
AV
CC
=
AVR
=
5.0 V)
Notes :
The L reference voltage is fixed to AV
SS
. The relative error increases as AVR becomes smaller.
Ensure that the output impedance of the external circuit connected to the analog input meets the following
condition :
Output impedance of external circuit
≤
10 k
(Sampling Time
=
4.0
μ
s)
If the output impedance of the external circuit is too high, the analog voltage sampling time may be too short.
Parameter
Symbol
Pin Name
Value
Unit
Remarks
Min.
AV
SS
3.5 LSB
AVR
6.5 LSB
Typ.
Max.
±
5.0
±
2.5
±
1.9
AV
SS
+
4.5 LSB
AVR
+
1.5 LSB
Resolution
10
bit
Total error
LSB
Non-linearity error
LSB
Differential linearity error
LSB
Zero transition voltage
V
OT
AN0 to AN7
+
0.5
mV
1 LSB
=
AVRH/1024
Full-scale transition
voltage
V
FST
AN0 to AN7
AVR
1.5 LSB
176 t
CP
mV
Conversion time
ns
Sampling time
64 t
CP
ns
Analog port input
current
I
AIN
AN0 to AN7
10
μ
A
Analog input voltage
V
AIN
I
A
AN0 to AN7
0
5
400
AVR
V
Reference voltage
AVR
2.7
AV
CC
5
5
V
Power supply current
AV
CC
mA
μ
A
μ
A
μ
A
I
AH
AV
CC
*
Reference voltage
supply current
I
R
AVR
I
RH
AVR
*
Variation between
channels
AN0 to AN7
4
LSB
Equivalent circuit of analog input circuit
C
R
ON
Analog input
Comparator
MB90561/A, MB90562/A
R
ON
=
2.2 k
approx.
C
=
45 pF approx.
MB90F562
R
ON
=
3.2 k
approx.
C
=
30 pF approx.
MB90F562/B
R
ON
=
2.6 k
approx.
C
=
28 pF approx.
Note : The values listed are an indication only.