User’s Manual
21
PART 1 AD268
5. I/O Allocation and Programming
0 to 5V / 0 to 20mA range:
Input voltage/current
A/D conversion data
0 to 5 V
0 to 20 mA
Hexadecimal
Integer
Resolution
Upper limit
+5.1196 V
+20.479 mA
H3FFF
16383
:
:
:
:
Full scale (positive)
+5 V
+20 mA
H3E80
16000
:
:
:
:
+0.3125 mV
+0.00125 mA
H0001
1
0
0 V
0 mA
H0000
0
0.3125 mV / bit
1.25
µ
A / bit
0 to 20mA range:
D = 800
×
A
D: Digital data
A: Analog signal (mA)
0
H3FFF
16383
Analog input
+5.1196V
20.479mA
Digital value
+10.2V
H3E80
16000
-10.2V
Upper limit
Lower limit
+5V
20mA
0 to 5V range:
D = 3200
×
A
D: Digital data
A: Analog signal (V)
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