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 Converte
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 000000000000000
9mA 000000000000000
8mA 000000000000000
7mA 000000000000000
6mA 000000000000000
5mA 000000000000000
4mA 000000000000000
3mA 000000000000000
2mA 000000000000000
1mA 000000000000000
0mA 000000000000000
-1mA 000000000000000
-2mA -100000000000000
-3mA -100000000000000
-4mA -100000000000000
-5mA -2-10000000000000
-6mA -3-10000000000000
-7mA -3-10000000000000
-8mA -3-10000000000000
-9mA -4-10000000000000
-10mA -5-10000000000000
Accuracy error on overcurrent injected ports (Unit: LSB)
Analog input pin
Injection
current
(Note 1)
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