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22 PCI-1720 User's Manual

4.3 Unipolar and Bipolar Binary Code

Tables

Table 4-6: Unipolar binary code table

Notes: 1. Vref is the reference source voltage that you select-

ed. Vref is +5 V or +10 V.

2. Nominal full scale is given by FS = Vref ( (4095/

4096).

3. Nominal LSB magnitude is given by LSB = Vref ( (1/

4096).

Digital Input Code

Examples of Analog Output Voltage

MSB LSB

1111 1111 1111 Vref (4095/4096)

1000 0000 0001 Vref (2049/4096)

1000 0000 0000 Vref (2048/4096)

0111 1111 1111 Vref (2047/4096)

0000 0000 0001 Vref (1/4096)

0000 0000 0000 Vref (0/4096)

Notes: 1. Vref is the reference source voltage that you select-

ed. Vref is +5 V or +10 V.

2. Nominal full scale is given by FS = Vref ( (2047/

2048).

3. Nominal LSB magnitude is given by LSB = Vref ( (1/

2048).

Digital Input Code

Examples of Analog Output Voltage

MSB LSB

1111 1111 1111 Vref ( (2047/2048)

1000 0000 0001 Vref ( (1/2048)

1000 0000 0000 0

0111 1111 1111 -Vref ( (1/2048)

0000 0000 0001 -Vref ( (2047/2048)

0000 0000 0000 -Vref ( (2048/2048)

Table 4-7: Bipolar binary code table

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 35 36

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Advantech PCI-1720 Manual de usuario Pagina 26