EVAL-AD4111SDZ
User Guide
UG-1124
Rev. A | Page 11 of 26
SOFTWARE OPERATION
Overview of the Main Window
After selecting
AD411x Evaluation Board
, the main window of
the evaluation software appears, as shown in Figure 16. The
Configuration
tab shows the control buttons and analysis
indicators of the
AD411x Eval+
software. The main window of
the
AD411x Eval+
software in quickstart mode contains five
tabs:
Configuration
,
Voltage Waveform
,
Current Waveform
,
Noise
Table
, and
Histogram
.
In advanced mode, two additional tabs are available:
Ch Waveform
and
Registers
.
CONFIGURATION TAB
The
Configuration
tab shows a block diagram of the
AD4111
.
This tab allows the user to select inputs, set up the ADC, reset
the ADC, and view errors present, as well as configure the
device for different demonstration modes. Figure 16 shows the
Configuration
tab in detail, and the following sections discuss
the different elements on the
Configuration
tab of the software
window.
Inputs and Open Wire Detection (Quickstart Mode Only)
The
AD4111
has eight voltage inputs, which can be configured
as single-ended or fully differential pairs, and four current
inputs (Label 1 in Figure 16).
One of the features of the
AD4111
is its ability to perform open
wire detection on voltage inputs while using a single power supply.
This feature can be toggled on and off as required (Label 2 in
Figure 16). If seven or all eight of the voltage inputs are enabled
as single-ended, current inputs are restricted to two or none,
respectively. After an input is selected, the software automatically
assigns the input to the correct channel(s). Click
Summary
(Label 12 in Figure 16) to see what channels an input has been
assigned to.
The voltage range can also be set per input to ±10 V, ±5 V, 0 V
to 10 V, or 0 V to 5 V. Changing this to the appropriate range
gives more realistic values for the
P - P Resolution
and
RMS
Resolution
shown in the
Noise Analysis
(see Figure 18).
Output Data Rate (ODR) and Measurement Time
The ODR can be set for all inputs in the
Configuration
tab
(Label 3 in Figure 16). Set the ODR by entering a value in Hz
into the
ODR(Hz)
box or a measurement time in ms into the
Time(ms)
box. If an ODR is entered, the software calculates the
measurement time. If a time is entered, the software calculates
the fastest ODR that can achieve the required measurement time.
The device only supports a certain number of ODRs. Therefore,
the software rounds up to the closest available value. The ODR
values depend on if a single or multiple channels are enabled.
The fastest ODRs are available if only one channel is enabled.
The values represent the sinc5 + sinc1 filter, which is enabled by
default. If the sinc3 filter is enabled instead, refer to the
AD4111
data sheet to see the corresponding values.
The value in
Time(ms)
represents time taken for one sample for
one enabled channel. If open wire is enabled, voltage inputs take
twice as long.
The value in the
Total Time
box represents the total time to take
one sample for all enabled inputs.
Demo Modes
The
AD411x Eval+
software contains a number of demonstration
modes in the
Demo Modes
area (Label 4 in Figure 16). These
demonstration modes configure the
AD4111
for each of the
input types (voltage fully differential, voltage single-ended, and
current measurements).
Reset
Click
Reset
(Label 5 in Figure 16) to perform a software reset of
the
AD4111
. There is no hardware reset pin on the
AD4111
.
To perform a hard reset, remove power from the board. The
software reset has the same effect as a hard reset.
Tutorial Button
Click the tutorial button (Label 6 in Figure 16) to open a tutorial
on using the software and additional information on using the
AD411x Eval+
software. Click the information buttons for further
information on different elements of the
Configuration
tab.
Functional Block Diagram
The functional block diagram of the
AD4111
(Label 7 in
Figure 16) shows each of the functional blocks within the
AD4111
. Clicking a configuration button on this diagram opens
the configuration pop-up window for that block.
Configuration Pop-Up Button
Each configuration pop-up button (Label 8 in Figure 16) opens
a different window to configure the relevant functional block.
External Parameters
There are three external parameters that are set by the EVAL-
AD4111SDZ but must be entered into the software: the external
reference (Label 9 in Figure 16), AVDD (Label 10 in Figure 16),
and AVSS (Label 11 in Figure 16). The external reference on the
EVAL-AD4111SDZ is set to 2.5 V by using an
ADR4525
. If
bypassing the
ADR4525
on the board, change the external
reference voltage value in the software to ensure correct
calculation of results in the
Voltage
Waveform, Current
Waveform
, and
Histogram
tabs.
Configuration Summary
Clicking
Summary
(Label 12 in Figure 16) displays the input
configuration, channel configuration, and information on each of
the individual setups as well as information on any error present.
These tabs can be used to quickly check how the ADC inputs
and channels are configured, as well as any errors that are present.
Status Bar
The status bar (Label 13 in Figure 16) displays status updates
such as
Analysis Completed
,
Reset Completed
,
Writing to
Registers
during software use, and the
Busy
indicator.
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