UG-726
EVAL-AD5696RSDZ User Guide
Rev. C | Page 4 of 13
BLOCK DIAGRAM AND DESCRIPTION
The
EVAL-AD5696RSDZ
software is organized to appear
similar to the functional block diagram shown in the
AD5696R
data sheet. Therefore, correlating the functions on the
EVAL-
AD5696RSDZ
evaluation board with the description in the
AD5696R
data sheet is simplified.
For a full description of each block, register, and its settings, see
the
AD5696R
data sheet.
Some of the blocks and their functions are described in this
section as they pertain to the evaluation board. The block
diagram is shown in Figure 4. Table 1 describes the
functionality of each block.
12
475
-10
4
J
A
C
I
B
F
D
G
E
H
Figure 4.
AD5696R
Block Diagram with Labels
Table 1. Block Diagram Functions (See Figure 4 for Labels)
Label Button/Function
Name Function
A
CONFIGURATION
wizard
Used to set the initial configuration for the board. Select the reference gain case from the
Output Gain
dropdown menu. A gain of 1 is the default. After setting up the initial configuration, click
Apply
to apply
the values. These settings can be modified at any stage while evaluating the board.
B
LDAC
and
RESET
(GPIO buttons)
Act as external GPIO pulses to the LDAC and RESET pins. The
LDAC
button transfers data from the input
registers (D) to the DAC registers (E). The
RESET
button clears all data from input registers and DAC
registers. These buttons are live; therefore, there is no need to click
Apply Changes
(J).
C
Select a Command
Command option dropdown menu selects how the data being transferred to the device affects the input
and DAC registers. After a data value is entered in an input register (D), this menu determines the
internal DAC registers affected by updating the input register (D). After a new value is written in the
input register (D), the data can be transferred to the DAC input register, or to the DAC input register and
the DAC register simultaneously. If the data is transferred to both registers, the channel DAC register (E)
will reflect the new value.
D Input
register
16-bit data word to be transferred to the device. Click
Apply Changes
(J) to transfer this 16-bit data
word to the device.
E DAC
register
Displays the value that is currently present in the DAC register on the device. Update the DAC registers
by selecting the appropriate command option or by toggling
LDAC
(B).
F
Software RESET
Returns the evaluation board and software to default values. This button is live; therefore, there is no
need to click
Apply Changes (J)
.
G
Load DAC
Users can individually control which channel loads the values from the input registers to the DAC
registers.
H
DAC
DAC configuration options provide access to individual channel configuration options such as power-
down options and hardware LDAC mask enable/disable settings.
I
Internal Reference
Select
Enable
from this setting to enable the on-chip reference for the evaluation board. If
Disable
is
selected, an external reference must be applied. This control is only available on the
AD5696R
.
J
Apply Changes
Applies all modified values to the device. Note that if an evaluation board is not connected, values
entered into the input registers are not transferred to the DAC registers.
