Texas Instruments BUF18830EVM, Руководство пользователя

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V =
DAC_CHANNEL
15V 68
?
1024
= 0.996V
V
DAC_CHANNEL
=
V Code_in_decimal
S
?
1024
BUF18830EVM Software
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18 SBOU103A – April 2011 – Revised May 2016
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BUF18830EVM User Guide and Software Tutorial
2.3.2 Measuring the Power Supply
You must measure the power supply (V
S
) with respect to the GND on the BUF18830EVM test board and
enter it in the V
SUP
field located in the top section of the software interface, as shown in Figure 18 .
Figure 18. Measuring and Entering Power-Supply Voltage
The voltage out of each DAC is calculated according to the V
S
value entered. The calculation is performed
according to Equation 1 .
(1)
For example, changing the value in the channel 6 cell immediately changes the output of channel 6 to
0.996V.
Example: Channel 6: Code 44 (hexadecimal) = 68 (decimal)
2.3.3 Read DAC Button
By pressing the Read DAC button in the BUF18830EVM software, all of the BUF18830 DAC/V
COM
registers are read to obtain the respective current register contents. Once the read procedure is complete,
all of the corresponding text boxes are updated to show the current values present in the DAC/V
COM
registers.