Renesas M32R/ECU Series, User Manual

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11
11-42
A-D Converters
32180 Group User's Manual (Rev.1.0)
11.4 Inflow Current Bypass Circuit
Figure 11.4.3 Example of an Inflow Current Bypass Circuit where GND – 0.7 V or Less is Applied
Table 11.4.1 Accuracy Errors (Actual Performance Values) when Current is Injected into AD0IN0
Note 1: The conversion accuracy is not affected unless the injection current is greater than 1 mA.
Unselected channel
Selected channel
To the internal logic
of the A-D Converter
OFF
ON
OFF
ON
ON
OFF
Assist circuit
GND - 0.7V or less
Leakage current
generated
Sensor input
Unaffected by
leakage
Leakage current
generated
AD0IN0 AD0IN1 AD0IN2 AD0IN3 AD0IN4 AD0IN5 AD0IN6 AD0IN7 AD0IN8 AD0IN9 AD0IN10 AD0IN11 AD0IN12 AD0IN13 AD0IN14 AD0IN15
10mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
9mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
8mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
7mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
6mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
5mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
4mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-1mA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-2mA -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-3mA -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-4mA -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-5mA -2 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
-6mA -3 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
-7mA -3 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
-8mA -3 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
-9mA -4 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
-10mA -5 -1 0 0 0 0 0 0 0 0 0 0 0 0 0
Accuracy error on overcurrent injected ports (Unit: LSB)
Analog input pin
Injection
current
(Note 1)