Texas Instruments BUF18830 Evaluation Module BUF18830EVM BUF18830EVM データシート
製品コード
BUF18830EVM
V
DAC_CHANNEL
=
V
Code_in_decimal
S
?
1024
V
=
DAC_CHANNEL
15V
68
?
1024
= 0.996V
BUF18830EVM Software Overview
www.ti.com
5.2.2
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. 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
.
(1)
For example, changing the value in the channel 6 cell immediately changes the output of channel 6 to
0.996V.
0.996V.
Example: Channel 6: Code 44 (hexadecimal) = 68 (decimal)
5.2.3
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
all of the corresponding text boxes are updated to show the current values present in the DAC/V
COM
registers.
18
BUF18830EVM User Guide and Software Tutorial
SBOU103 – April 2011
© 2011, Texas Instruments Incorporated