Contec ADI12-8(USB)GY, User Manual

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3. Setup
ADI12-8(USB)GY
23
Sampling
Input Range and Conversion Data
On ADI12-8(USB)GY, the range of input can be selected from 0 - 5V, 0 - 10V,
±
5V and
±10
V by using software.
The analog signals are converted into digital signals with a 12-bit resolution based on
the range setting.
Unipolar range
Indicates that the range of voltage measurable is
single polar range, for this module, it is 0 - 5V or
0 - 10V.
The right figure shows the relation between
converted data and voltage value within the
range of 0 - 10V. Because the converted data is
based on the value of dividing 10V voltage
width(voltage span) by 4096, the converted data
increase every 1, the voltage value increase
2.44mV.
The converted data will be FFFh for a voltage its
converted data exceed FFFh.
Moreover, the converted data increase every 1,
the voltage value increase 1.22mV in case of 0 -
5V range.
(Decimal) (Hexadecimal)
10V
4095 FFFh
9.997 56 V
4095 FFFh
9.997 56 V
4094 FFEh
9.995 12 V
4093 FFDh
9.992 68 V
: :
2049 801h
5.002 44 V
2048 800h
5.000 00 V
2047 7FFh
4.997 56 V
: :
2 002h
0.004 88 V
1 001h
0.002 44 V
0V
0 000h
0.000 00 V
Voltage value = (Voltage span of input range) / 4096 x (Converted data)
Bipolar range
Indicates that the range of voltage measurable is
bi-polar range, for this module, it is
±
5V and
±10
V.
The right figure shows the relation between
converted data and voltage value within the range
of
±10
V. Because the converted data is based on
the value of dividing 20V voltage width(voltage
span) by 4096, the converted data increase every
1, the voltage value increase 4.88mV.
The converted data will be FFFh for a voltage its
converted data exceed FFFh.
Moreover, the converted data increase every 1,
the voltage value increase 2.44mV in case of
±
5V
range.
(Decimal) (Hexadecimal)
10V
4095 FFFh
9.995 12 V
4095 FFFh
9.995 12 V
4094 FFEh
9.990 23 V
4093 FFDh
9.985 35 V
: :
2049 801h
0.004 88 V
2048 800h
0.000 00 V
2047 7FFh
-0.004 88 V
: :
2 002h
-9.990 23 V
1 001h
-9.995 12 V
-10V
0 000h
-10.000 00 V
Voltage value = (Voltage span of input range) / 4096 x (converted data) + offset voltage
Offset voltage: -10V for range of
±10
V, -5V for range of
±5
V.