MB90560/565 Series
5. Electrical Characteristics for the A/D Converter
(TA = −40 °C to +85 °C, 3.0 V ≤ AVR, VCC = AVCC = 5.0 V ±10%, VSS = AVSS = 0.0 V)
Value
Typ.
10
Parameter
Resolution
Symbol Pin Name
Unit
Remarks
Min.
Max.
bit
Total error
±5.0
±2.5
±1.9
LSB
LSB
LSB
Non-linearity error
Differential linearity error
AVSS
−3.5 LSB
AVSS
+4.5 LSB
Zero transition voltage
VOT
AN0 to AN7
AN0 to AN7
+0.5
mV
mV
1 LSB = AVRH/1024
Full-scale transition
voltage
AVR
AVR
AVR
VFST
−6.5 LSB −1.5 LSB +1.5 LSB
Conversion time
Sampling time
176 tCP
64 tCP
ns
ns
Analog port input
current
IAIN
AN0 to AN7
10
µA
Analog input voltage
Reference voltage
VAIN
AN0 to AN7
AVR
0
AVR
AVCC
V
V
2.7
IA
IAH
IR
AVCC
5
mA
µA
µA
µA
Power supply current
AVCC
5
*
*
AVR
400
Reference voltage
supply current
IRH
AVR
5
4
Variation between
channels
AN0 to AN7
LSB
* : Current when A/D converter is not used and CPU is in stop mode (VCC = AVCC = AVR = 5.0 V)
Notes : • The L reference voltage is fixed to AVSS. 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 kΩ (Sampling Time = 4.0 µs)
• If the output impedance of the external circuit is too high, the analog voltage sampling time may be too short.
• Equivalent circuit of analog input circuit
RON
C
Comparator
Analog input
MB90561/A, MB90562/A
RON = 2.2 kΩ approx.
C = 45 pF approx.
MB90F562
RON = 3.2 kΩ approx.
C = 30 pF approx.
MB90F562/B
RON = 2.6 kΩ approx.
C = 28 pF approx.
Note : The values listed are an indication only.
68
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