19-5053; Rev 0; 11/09
MAX97000 Evaluation Kit
General Description
The MAX97000 evaluation kit (EV kit) is a fully assembled
and tested PCB that evaluates the MAX97000 mono
Class D audio power amplifier and stereo Class H
DirectDrive
M
headphone amplifier communicating over
a 2-wire I
2
C interface. The EV kit features an on-board
microcontroller for communicating with the I
2
C interface
of the MAX97000. Pads are provided for accessing the
analog inputs and amplifier outputs.
The MAX97000 EV kit requires a 2.7V to 5.5V power
supply. The on-chip LDO generates an internal 1.8V sup-
ply from the 2.7V to 5.5V supply.
Windows
M
2000-, Windows XP
M
-, and Windows Vista
M
-
compatible software is provided to facilitate configura-
tion. The software controls an on-board microcontroller
over USB, which generates I
2
C commands.
S
Proven_Audio_PCB_Layout
S
On-Board_USB_Interface_Circuit_Generates_I
2
C-
Features
S
2.7V_to_5.5V_Single-Supply_Operation
Evaluates: MAX97000
Compatible_Signals
S
PCB_Pads_for_User-Supplied_I
2
C-Compatible_
Signals
S
Surface-Mount_Components
S
Windows_2000-,_Windows_XP-,_and_Windows_Vista_
(32-Bit)-Compatible_Software
S
Fully_Assembled_and_Tested
Ordering Information
PART
MAX97000EVKIT+
TYPE
EV Kit
+Denotes
lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
C1, C3–C10,
C17
QTY
10
DESCRIPTION
0.1FF
Q10%,
16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
4.7FF
Q10%,
6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
10pF
Q5%,
50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
10FF
Q10%,
6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J106M
1FF
Q10%,
10V X5R ceramic
capacitors (0402)
Murata GRM155R61A105K
22pF
Q5%,
50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
DESIGNATION
C20
C26–C29,
C39–C42
C31, C33
QTY
1
DESCRIPTION
3300pF
Q10%,
50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K
Not installed, ceramic capacitors
(0402)
0.1FF
Q10%,
16V X7R ceramic
capacitors (0402)
Murata GRM155R71C104K
0.22FF
Q10%,
10V X5R ceramic
capacitors (0402)
Murata GRM155R61A224K
Green LED (0603)
Black miniature test point
3.5mm stereo phone jack, SMT,
3-position, nonswitch
White miniature test point
Red miniature test point
White RCA jacks (left)
C2
1
0
2
C11, C12
2
C13, C15, C32,
C34
C14, C16,
C22–C25, C30,
C35–C38
C18, C19
C43–C47
D1
GND
HPJK
HPL
HPR
JINA1, JINB1
5
1
1
1
1
1
2
4
11
2
DirectDrive is a registered trademark of
Maxim Integrated Products, Inc.
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
________________________________________________________________ _Maxim
Integrated Products_
_ 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX97000 Evaluation Kit
Evaluates: MAX97000
Component List (continued)
DESIGNATION
JINA2, JINB2
JU1, JU2, JU3
JU4
L1, L2
OUT-, OUT+
P1
R1, R10–R15,
R18, R19
R2
R3
R4
R5, R8, R9
R6, R7
R16, R17
R20, R21
R22, R23
TP1, TP2
QTY
2
3
1
0
2
1
9
1
1
1
3
2
0
2
2
0
DESCRIPTION
Red RCA jacks (right)
2-pin headers
3-pin header
Not installed, inductors (provided
with EV kit)
TOKO A916CY-220M
Test points
USB mini type-B receptacle con-
nector
0I
Q5%
resistors (0402)
220I
Q5%
resistor (0603)
10kI
Q5%
resistor (0603)
2.2kI
Q5%
resistor (0603)
1.5kI
Q5%
resistors (0603)
27I
Q5%
resistors (0603)
Not installed, resistors (0603)
0I
Q5%
resistors (0603)
22I
Q5%
resistors (0402)
Not installed, multipurpose test
points
Mono Class D speaker and Class
H headphone amplifier (25 WLP)
Maxim MAX97000EWA+
—
—
—
*EP
= Exposed pad.
1
4
1
Y2
1
Y1
1
U6
1
DESIGNATION
U2
U3
U4
U5
QTY
1
1
1
1
DESCRIPTION
32-bit microcontroller (68 QFN-EP*)
Maxim MAXQ2000-RAX+
93C46 type 3-wire EEPROM (8 SO)
UART-to-USB converter (32 TQFP)
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+
(Top Mark: AEI)
3.3V regulator (5 SC70)
Maxim MAX8511EXK25+
(Top Mark: ADV)
16MHz crystal (HCM49)
Hong Kong X’tals
SSM16000N1HK188F0-0
6MHz crystal (HCM49)
Hong Kong X’tals
SSL60000N1HK188F0-0
USB high-speed A-to-mini B
cable, 2m
Shunts
PCB: MAX97000 EVALUATION
KIT+
U1
1
Component Suppliers
SUPPLIER
Hong Kong X’tals Ltd.
Murata Electronics North America, Inc.
TOKO America, Inc.
PHONE
852-35112388
770-436-1300
847-297-0070
WEBSITE
www.hongkongcrystal.com
www.murata-northamerica.com
www.tokoam.com
Note:
Indicate that you are using the MAX97000 when contacting these component suppliers
MAX97000 EV Kit Files
FILE
INSTALL.EXE
MAX97000_1_2.EXE
FTD2XX.INF
UNINST.INI
USB_Driver_Help.PDF
Application program
USB device driver file
Uninstalls the EV kit software
USB driver installation help file
DESCRIPTION
Installs the EV kit files on your computer
2_ _ _______________________________________________________________________________________
MAX97000 Evaluation Kit
Evaluates: MAX97000
Quick Start
• 5V, 1A DC power supply (PVDD)
• Speaker
• Headphones
• User-supplied Windows 2000, Windows XP, or
Windows Vista PC with a spare USB port
• MAX97000 EV kit (cable included)
Note:
In the following sections, software-related items
are identified 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.
The MAX97000 EV kit is fully assembled and test-
ed. Follow the steps below to verify board operation.
Caution:_Do_not_apply_power_to_VDD.
1)
Visit
www.maxim-ic.com/evkitsoftware
to down-
load the latest version of the EV kit software,
MAX97000_1_2xx.ZIP. Save the EV kit software to a
temporary folder and uncompress the ZIP file.
Install the EV kit software on the computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder.
Verify that shunts are installed on jumpers JU1 and
JU2. This configures the I
2
C inputs to receive sig-
nals from the USB interface circuitry.
Verify that a shunt is installed on jumper JU3.
Verify that a shunt is installed in the 2-3 position
on jumper JU4. This is the hardware enable. The
MAX97000 has a software enable that is also
required to turn on the MAX97000.
8)
9)
7)
6)
Connect the USB cable from the PC to the EV kit
board. A
New_ Hardware_ Found
window pops up
when installing the USB driver for the first time.
If a window is not seen that is similar to the one
described above after 30s, remove the USB cable
from the board and reconnect it. Administrator privi-
leges are required to install the USB device driver
on Windows.
Follow the directions of the
Found_ New_ Hardware_
window to install the USB device driver. Manually
specify the location of the device driver to be
C:\
Program_Files\MAX97000_1_2
(default installation
directory) using the
Browse
button. During device
driver installation, Windows may show a warning
message indicating that the device driver Maxim
uses does not contain a digital signature. This is
not an error condition and it is safe to proceed
with installation. Refer to the USB_Driver_Help.PDF
document included with the software for additional
information.
Connect the 5V power supply across the PVDD and
GND pads.
Connect the speaker across the OUT+ and OUT-
test points.
Required Equipment
Procedure
2)
10) Connect the headphones to HPJK.
11) Enable the power supply.
12) Start the MAX97000 EV kit software by selecting its
icon in the
Start_|_Programs
menu.
13) Observe as the program automatically detects the
address of the MAX97000 and starts the main pro-
gram.
14) The MAX97000 is now ready for evaluation.
3)
4)
5)
________________________________________________________________________________________ _ 3
MAX97000 Evaluation Kit
Evaluates: MAX97000
Figure 1. MAX97000 Evaluation Kit Software Main Control Tab
4_ _ _______________________________________________________________________________________
MAX97000 Evaluation Kit
Evaluates: MAX97000
Detailed Description of Software
Note:
Text in
bold
refers to items in the EV kit software.
The MAX97000 EV kit software GUI (Figures 1 and
2) provides a convenient way to test the features of
the MAX97000. Figure 1 shows the MAX97000 EV kit
software’s
Main_ Control
tab, while Figure 2 shows the
Registers
tab. Actions on the two tabs generate I
2
C
commands to update the MAX97000 internal memory
registers.
The MAX97000 EV kit software
Main_Control
tab (Figure
1) divides the EV kit functions into logical blocks. The
MAX97000 EV kit software
Registers
tab (Figure 2)
displays each register’s individual bit logic-level status.
A data bit in bold indicates a logic-high, while a data
bit that is not bold indicates a logic-low. Clicking on the
individual data bit toggles the bit and performs a write
command. The new command is shown in the edit box at
the right. Write commands can be written to the registers
alternatively by typing a hex value in the edit box and
pressing the Enter key on the keyboard.
Upon starting the program, the MAX97000 EV kit soft-
ware automatically searches for the USB interface cir-
cuit and then for the MAX97000 device address. The
MAX97000 EV kit enters the normal operating mode
when the USB connection is detected and has found the
device address. If jumper JU4 (hardware shutdown) is
in the 1-2 position (off), the MAX97000’s I
2
C bus is not
active. The
ENABLE
checkbox is the software shutdown
and requires JU4 to be in the 2-3 position (on). The
ENABLE_checkbox
in the
Main_Control
tab enables the
EV kit if the hardware enable is also on. If the USB con-
nection is not detected, the software prompts the user to
retry or enter the demo mode.
The MAX97000 EV kit software enters the demo mode
when the USB connection is not detected or by select-
ing the
Options_ |_ Demo Mode
menu item in the main
window. When in demo mode, all software communica-
tion to the EV kit circuit is disabled; however, most of the
software GUI is functional. Demo mode allows the user
to evaluate the software without hardware connectivity.
If the USB cable is connected to the EV kit, but power
is not applied to PVDD, the EV kit GUI acts like it is in
demo mode. In such a case, the EV kit is connected to
the PC through USB, and I
2
C commands can be sent to
the MAX97000. However, without power, the MAX97000
does not acknowledge the I
2
C commands. When power
is applied, press the
Reset
button to detect the pres-
ence of the MAX97000.
The
Write_ All
button writes the current settings to all
of the registers on the GUI. The EV kit software GUI
performs I
2
C write commands as changes occur on
the GUI. The
Read_All
button changes the GUI settings
to match the MAX97000 register settings. To change
settings one time, enter demo mode by selecting the
Options_ |_ Demo_ Mode
menu item, change the GUI
to the required settings, exit demo mode by selecting
Options_ |_ Demo_ Mode,
and then press the
Write_ All_
button. If further changes are not required, enter demo
mode to disable communication to the MAX97000. To
obtain the MAX97000 settings, exit demo mode and
press the
Read_All
button. The
Reset
button clears the
EV kit software GUI and reprograms the MAX97000 to
the default values.
The MAX97000 EV kit software’s
MAX97000_ Master_
Controls
group box contains
ENABLE,_ Volume_ Slew_
Disable,
and
Zero_Crossing_Detection_Disable
check-
boxes. The
ENABLE
checkbox, which is also called the
software shutdown, enables or disables the MAX97000.
The
Volume_ Slew_ Disable
checkbox, when checked,
disables the volume slewing. The
Zero_ Crossing_
Detection_ Disable
checkbox, when checked, disables
the zero-crossing detection (ZCD) during a volume-
change operation. When enabled (unchecked), the ZCD
forces all volume adjustment to be made when the out-
put signal is crossing zero, thus reducing audio clicks
during volume changes.
The MAX97000 EV kit software’s
Input_ Gain
group
box selects the input channel preamp gain for the
MAX97000. The MAX97000 input channel preamp gain
is selectable between
-6dB,_ -3dB,_ 0dB,_ +3dB,_ +6dB,
+9dB,_and_+18dB.
Graphical User Interface (GUI)
Write All/Read All/Reset
Software Startup
MAX97000 Master Controls
Demo Mode
Input Gain
________________________________________________________________________________________ _ 5
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