32186 datasheet(544/1032 Pages) RENESAS

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A/D CONVERTER

11-46

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

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: • Since the influence of the adjacent channel accuracy becomes large, do not inject over-current into the channel

selected in the A/D0 Simultaneous sampling analog input select bit (ADSEL2) of the A/D single mode register 2

(ADSIM2). (No channels selected when "0000" to " 1011" is set up in ADSEL2 bit.)

Unselected channel

Selected channel

To the internal logic

of the A/D Converter

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

2mA

422222222222222

1mA

222222222222222

0mA

222222222222222

-1mA

122222222222222

-2mA

022222222222222

Accuracy error on overcurrent injected ports (Unit: LSB)

pour

electric

power

Analog input pin

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