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MAX19777 Evaluation System
General Description
Features
Evaluates: MAX19777
The MAX19777 evaluation system (EVSYS) is a fully
assembled and tested PCB that evaluates the MAX19777
2-channel, 12-bit, SPI™-compatible 3Msps analog-
to-digital converter (ADC). The MAX19777 EVSYS
consist of the MAXPRECADCMB1 and the MAX19777
evaluation kit (EV kit). The system also includes Window
7, Windows 8, and Windows 10 software that provides a
simple graphical user interface (GUI) for exercising the
features of the device. The EV kit comes installed with a
MAX19777AZA+ in a package.
Ordering Information
appears at end of data sheet.
●
48MHz SPI Interface
●
Window 7, Windows 8 and Windows 10-Compatible
Software
●
Time Domain, Frequency Domain, and Histogram
Plotting in the EV Kit Software
●
Frequency, RMS, Min, Max, and Average DC
Calculations in the EV Kit Software
●
On-Board Input Buffers
●
USB-PC Connection
●
Proven PCB Layout
●
Fully Assembled and Tested
EV System Component List
PART
MAX119777EVKIT#
MAXPRECADCMB1#
QTY
1
1
DESCRIPTION
Daughter board
Serial interface master board
MAX19777 EV Kit Files
FILE
MAX19777EVKit
SetupVx.x.exe
MAX19777.EXE
SLSUSB.DLL
SLSUSB.INF
SLSUSB.SYS
SLS_USB_Driver_
Help_100.PDF
DESCRIPTION
Installs the EV system files on
your computer
Application program
Software library file
USB device driver file
USB device driver file
USB driver installation file
MAX19777 EV Kit Photo
SPI is a trademark of Motorola, Inc.
Windows 7, Windows 8, and Windows 10 are registered trademarks of Microsoft Corp.
319-100125; Rev 0; 1/18
MAX19777 Evaluation System
Evaluates: MAX19777
Quick Start
Required Equipment
●
MAX19777 EV System (USB cable included)
●
+5.5V, 500mA DC power supply
●
PC with a spare USB port
●
Function generator
●
±5V, 200mA DC power supply
●
+5V, 100mA DC power supply
Note:
In the following sections, software-related items are iden-
tified by bolding. Text in
bold
refers to items directly from the
EV kit software. Text in
bold and under-
lined
refers to items from the Windows operating system.
11) Connect the USB cable from the PC to the EV kit
board. Follow the instructions on the SLS_USB_
Driver_Help_100.PDF file to manually install the USB
driver. Administrator privileges are required to install
the USB device driver on Windows.
12) Start the EV kit software by opening its icon in the
Windows
All Programs
menu. The EV kit software
main window appears, as shown in
Figure 1.
13) The main window should display
Connected
at the bottom-left corner
14) Check the
Remove DC
checkbox.
15) Press the
Start Conversion
button.
16) Verify that the
Frequency
displayed in the
Calculation
group box reads approximately 100000Hz.
Hardware
Procedure
The EV kit is fully assembled and tested. Follow the steps
below to verify board operation.
Caution: Do not turn on
the power supply until all connections are completed.
1)
2)
3)
Install the MAX19777EVKitSetupVx.x.exe on your
computer
Verify that all jumpers are in their default positions, as
shown in
Table 1.
Connect the positive terminal of the +5.5V power
supply to the VIN connector on the MAXPRECAD-
CMB1. Connect the negative terminal of the same
power supply to the GND connector on the board.
Connect the MAX19777s 2x8 right angle female
header (J1) to the MAXPRECADCMB1s 2x8 right
angle male header (H2).
Connect the +5V power supply to the OP+ test points,
-5V power supply to the OP- test point, and ground to
the nearest GND test point.
Connect the +5V power supply to the 5V test point
and the ground to the nearest GND test point.
Set the signal source to generate a 10kHz, +2.95V
peak-to-peak sinusoidal wave.
Connect the positive terminal of the signal generator
to the U1_AIN1_DC or U1_AIN1_DC_SMA connec-
tor. Connect the negative terminal of the signal gen-
erator to the GND connector.
Turn on the power supplies.
Detailed Description of Software
The main window of the evaluation software
(Figure
1)
contains a
Device Configuration
group box,
a
Datalogging
group box, and four tab sheets to display
the sampled data.
Device Configuration
Use the
Channel Select
drop-down list in the
Device
Configuration
group box to select the analog input
channel for analog-to-digital conversion.
4)
Data Logging
5)
6)
7)
8)
In the
Datalogging
group box, the user can select
the desired number of conversions in the
Number of
Samples
drop-down list. Enter the desired sampling rate
in the
Sample Rate (ksps)
edit box. The actual sampling
rate is displayed at the right of the
Sample Rate (ksps)
edit box. Press the
Start Conversion
button to start
sampling. After sampling is finished, the user can save
the data to a file by pressing the
Save to File
button.
The
Save to File
button is not active until the sampling
is done.
Time Domain, Frequency Domain,
Histogram, and Single Conversion Tabs
9)
10) Turn on the function generator.
After the
Start Conversion
button in the
Datalogging
group box is pressed, the sampled data in the time
domain is plotted in the
Time Domain
tab sheet. The
sampled data in the frequency domain is plotted in the
Frequency Domain
tab sheet, and the histogram of the
sampled signal is plotted in the
Histogram
tab sheet.
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MAX19777 Evaluation System
Evaluates: MAX19777
Figure 1. MAX19777 EV Kit Software Main Window
The
Single Conversion
tab sheet displays one sampled
data.
Check the
Auto Convert
checkbox to automatically and
repeatedly do the ADC conversions and update the active
tab sheet.
Time Domain Tab
In the
Time Domain
tab sheet (Figure
2a
and
2b),
check the
Remove DC
check box to remove the DC
component of the sampled signal. In the
Scope Display
Control Vertical
group box, when the
Auto Scale
checkbox is checked, the software automatically scales
the vertical axis in the plot. If the
Auto Scale
checkbox is
unchecked, enter the appropriate values into the
Y-MAX
and
Y-MIN
edit boxes and press the Set button to set the
boundaries for the vertical axis. The software automati-
cally calculates the
Frequency, RMS, MIN, MAX,
and
Avg DC
of the sampled signal and displays the calculated
values in the
Calculation
group box.
Frequency Domain Tab
The
Frequency Domain
tab sheet (Figure
3)
displays
the FFT plot of the signal shown in the
Time Domain
tab
sheet.
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│
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