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PCI-1720U User Manual 22

4.3 Unipolar and Bipolar Binary Code Tables

Table 4.6: Unipolar Binary Code Table

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 (2048/4096)

0000 0000 0001 Vref (1/4096)

0000 0000 0000 Vref (0/4096)

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

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).

Table 4.7: Bipolar Binary Code Table

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)

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

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).

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