MAX97000EVKIT [MAXIM]
MAX97000 Evaluation Kit;
| 型号： | MAX97000EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | MAX97000 Evaluation Kit |
| 文件： | 总15页 (文件大小：1500K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Features
Sꢀ 2.7V_to_5.5V_Single-Supply_Operation
Sꢀ Proven_Audio_PCB_Layout
Sꢀ On-Board_USB_Interface_Circuit_Generates_I2C-
Compatible_Signals
Sꢀ PCB_Pads_for_User-Supplied_I2C-Compatible_
M
DirectDrive headphone amplifier communicating over
a 2-wire I2C interface. The EV kit features an on-board
microcontroller for communicating with the I2C interface
of the MAX97000. Pads are provided for accessing the
analog inputs and amplifier outputs.
Signals
Sꢀ Surface-Mount_Components
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.
Sꢀ Windows_2000-,_Windows_XP-,_and_Windows_Vista_
(32-Bit)-Compatible_Software
Sꢀ Fully_Assembled_and_Tested
M
M
M
Windows 2000-, Windows XP -, and Windows Vista -
compatible software is provided to facilitate configura-
tion. The software controls an on-board microcontroller
over USB, which generates I2C commands.
Ordering Information
PART
TYPE
MAX97000EVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
0.1FF Q10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
3300pF Q10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H332K
C1, C3–C10,
10
C20
1
0
2
C17
C26–C29,
C39–C42
Not installed, ceramic capacitors
(0402)
4.7FF Q10%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J475K
C2
1
2
0.1FF Q10%, 16V X7R ceramic
capacitors (0402)
Murata GRM155R71C104K
C31, C33
C43–C47
10pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H100J
C11, C12
0.22FF Q10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A224K
5
10FF Q10%, 6.3V X5R ceramic
capacitors (0603)
Murata GRM188R60J106M
C13, C15, C32,
C34
4
D1
1
1
Green LED (0603)
GND
Black miniature test point
C14, C16,
C22–C25, C30,
C35–C38
1FF Q10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A105K
11
2
3.5mm stereo phone jack, SMT,
3-position, nonswitch
HPJK
1
HPL
HPR
1
1
2
White miniature test point
Red miniature test point
White RCA jacks (left)
22pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H220J
C18, C19
JINA1, JINB1
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
Component List (continued)
DESIGNATION QTY
DESCRIPTION
Red RCA jacks (right)
2-pin headers
DESIGNATION QTY
DESCRIPTION
JINA2, JINB2
JU1, JU2, JU3
JU4
2
3
1
32-bit microcontroller (68 QFN-EP*)
Maxim MAXQ2000-RAX+
U2
1
3-pin header
U3
U4
1
1
93C46 type 3-wire EEPROM (8 SO)
UART-to-USB converter (32 TQFP)
Not installed, inductors (provided
with EV kit)
TOKO A916CY-220M
L1, L2
0
3.3V regulator (5 SC70)
Maxim MAX8511EXK33+
(Top Mark: AEI)
U5
U6
Y1
Y2
1
1
1
1
OUT-, OUT+
P1
2
1
Test points
USB mini type-B receptacle con-
nector
3.3V regulator (5 SC70)
Maxim MAX8511EXK25+
(Top Mark: ADV)
R1, R10–R15,
R18, R19
9
0I Q5% resistors (0402)
16MHz crystal (HCM49)
Hong Kong X’tals
SSM16000N1HK188F0-0
R2
R3
1
1
1
3
2
0
2
2
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)
R4
6MHz crystal (HCM49)
Hong Kong X’tals
SSL60000N1HK188F0-0
R5, R8, R9
R6, R7
R16, R17
R20, R21
R22, R23
USB high-speed A-to-mini B
cable, 2m
—
1
4
1
—
Shunts
PCB: MAX97000 EVALUATION
KIT+
Not installed, multipurpose test
points
—
TP1, TP2
0
*EP = Exposed pad.
Mono Class D speaker and Class
H headphone amplifier (25 WLP)
Maxim MAX97000EWA+
U1
1
Component Suppliers
SUPPLIER
Hong Kong X’tals Ltd.
PHONE
WEBSITE
852-35112388
770-436-1300
847-297-0070
www.hongkongcrystal.com
www.murata-northamerica.com
www.tokoam.com
Murata Electronics North America, Inc.
TOKO America, Inc.
Note: Indicate that you are using the MAX97000 when contacting these component suppliers
MAX97000 EV Kit Files
FILE
DESCRIPTION
Installs the EV kit files on your computer
Application program
INSTALL.EXE
MAX97000_1_2.EXE
FTD2XX.INF
USB device driver file
UNINST.INI
Uninstalls the EV kit software
USB driver installation help file
USB_Driver_Help.PDF
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MAX97000 Evaluation Kit
6) Connect the USB cable from the PC to the EV kit
Quick Start
Required Equipment
• 5V, 1A DC power supply (PVDD)
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.
• Speaker
• Headphones
• User-supplied Windows 2000, Windows XP, or
Windows Vista PC with a spare USB port
7) 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\MAX97000ꢀ1ꢀ2 (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.
• 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.
Procedure
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.
8) Connect the 5V power supply across the PVDD and
GND pads.
9) Connect the speaker across the OUT+ and OUT-
test points.
2) Install the EV kit software on the computer by run-
ning the INSTALL.EXE program inside the tempo-
rary folder.
10) Connect the headphones to HPJK.
11) Enable the power supply.
3) Verify that shunts are installed on jumpers JU1 and
JU2. This configures the I2C inputs to receive sig-
nals from the USB interface circuitry.
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.
4) Verify that a shunt is installed on jumper JU3.
5) 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.
14) The MAX97000 is now ready for evaluation.
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MAX97000 Evaluation Kit
Figure 1. MAX97000 Evaluation Kit Software Main Control Tab
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MAX97000 Evaluation Kit
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 I2C commands can be sent to
the MAX97000. However, without power, the MAX97000
does not acknowledge the I2C commands. When power
is applied, press the Reset button to detect the pres-
ence of the MAX97000.
Detailed Description of Software
Note: Text in bold refers to items in the EV kit software.
Graphical User Interface (GUI)
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 I2C
commands to update the MAX97000 internal memory
registers.
Write All/Read All/Reset
The Write_ All button writes the current settings to all
of the registers on the GUI. The EV kit software GUI
performs I2C 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 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.
Software Startup
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 I2C 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.
MAX97000 Master Controls
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.
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.
Input Gain
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.
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MAX97000 Evaluation Kit
Figure 2. MAX97000 Evaluation Kit Software Registers Tab
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MAX97000 Evaluation Kit
selection, the speaker and headphone mixers provide
options for selecting the audio source for the SPKR_
Mixer,_Left_HP_Mixer,_and_Right_HP_Mixer.
Charge Pump
The MAX97000 features an internal charge pump for
Maxim’s Class H DirectDrive architecture. The charge
pump operates in two modes, fixed mode and high-effi-
ciency mode. By default, the MAX97000 charge pump
operates in high-efficiency mode. High-efficiency mode
on the charge pump dynamically changes the internal
supply rails. To have fixed internal supply rails, check the
Fixed_Mode checkbox in the Charge_Pump group box.
Within fixed mode, there are two options for the supply
rails shown in the drop-down list, Q1.8V and Q0.9V.
Speaker Amplifier
The MAX97000 EV kit software’s Speaker_ Amplifier_
group box contains the speaker mixer, speaker volume,
and speaker enable control. Check the Speaker_Enable_
checkbox to enable the speaker amplifier. The Speaker_
Volume track bar sets the speaker volume between
-30dB (min) to +20dB (max). Alternatively, the user can
enter a numerical value inside the Speaker_Volume edit box.
Distortion Limiter
The distortion limiter limits distortion based on the
defined THD level and has programmable release time.
Headphone Amplifier
The Headphone_ Amplifier group box enables or dis-
ables the headphone outputs. The Left_ Headphone_
Volume and Right_ Headphone_ Volume track bars
set the headphone volume. The Left_ HP_ Enable and
Right_ HP_ Enable checkboxes enable the headphone
amplifiers.
Switch Enable
The MAX97000 features an internal switch that can be
enabled by checking the Switch_ Closed checkbox in
the Analog_ Switch group box. The internal switch is
closed by default. The software shutdown has no effect
on the internal switch. Under a hardware shutdown, the
switch is open.
The Left_ Headphone_ Volume and Right_ Headphone_
Volume track bars set the left and right headphone
volume, respectively, to between -64dB (min) to +6dB
(max). Alternatively, the user can enter a numerical
value inside the Left_ Headphone_ Volume and Right_
Headphone_Volume edit boxes.
Low-Power Mode
The MAX97000’s low-power mode minimizes current
consumption when only using the headphone amplifier.
Low-power mode transmits a single-ended audio signal
to the headphone amplifier from either INA or INB, or a
differential signal from INA and INB. Low-power mode
is enabled by selecting LP_ Mode from the drop-down
list. The volume control and mixer are bypassed in this
mode.
I2C Interface Indicator
The MAX97000 EV kit software Interface group box dis-
plays the MAX97000’s I2C_ Device_ Address,_ Register_
Address, and the last Data_ Sent. The MAX97000 I2C
device address is internally set to 0x9A.
Simple I2C Commands
There are three methods for communicating with the
MAX97000 EV kit, through the Main_Control tab (Figure
1), the Registers tab (Figure 2), or by using low-level
SMBusK commands available in the Advanced_ User_
Interface window (Figure 3). Select Options_|_Interface_
(Advanced_ User_ Interface) to display the Advanced_
User_Interface window that allows I2C operations, such
as SMBusReadByte and SMBusWriteByte.
Mixer
The speaker, left headphone, and right headphone
each have an independent mixer. The MAX97000 EV kit
accepts a pair of single-ended audio inputs for stereo
operation, or a pair of differential audio inputs for mono
operation. The single-ended input signals for the speak-
er and headphones are defined as IN_1 (left) and IN_2
(right). In the Input_Configuration group box, select the
Stereo_(S/E) for single-ended stereo operation or Mono_
(DIF) for differential mono operation. Depending on the
SMBus is a trademark of Intel Corp.
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MAX97000 Evaluation Kit
Figure 3. Advanced User Interface Window (2-Wire Interface Tab)
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MAX97000 Evaluation Kit
Filtered Output
Audio analyzers typically cannot accept pulse-width-
modulated (PWM) signals at their inputs. Therefore, the
MAX97000 EV kit includes a pair of lowpass filters at
the output to ease evaluation. To use the filtering output
pads (FOUT+/FOUT-), install inductors L1 and L2 (pro-
vided with the EV kit), connect the load between FOUT+
and FOUT-, and connect the filtered output to the audio
analyzer. The lowpass filters at the speaker outputs are
optimized for an 8I speaker.
Detailed Description of Hardware
The MAX97000 EV kit evaluates the MAX97000 Class
D audio amplifier and stereo DirectDrive headphone
amplifier, which communicates over I2C. The EV kit dem-
onstrates the MAX97000 features such as user-defined
input configuration, input gain, input source, output
enable, and volume control.
The EV kit uses the MAX97000 IC in a 25-bump WLP
(2mm x 2mm) package on a proven six-layer PCB
design. The MAX97000 EV kit operates from a 2.7V to
5.5V DC power supply.
Filterless Output
The MAX97000 EV kit’s filterless outputs (OUT+/OUT-)
can be connected directly to a speaker load without
any filtering. Use the OUT+/OUT- test points to connect
the speaker directly to the MAX97000 outputs using a
twisted-pair cable. Do not install inductors L1 and L2 for
maximum efficiency.
Table_1._MAX97000_Jumper_Table
JUMPER
SHUNT_POSITION
Closed*
Open
DESCRIPTION
On-board I2C. Connects on-board SCL signal to the SCL pad.
JU1
User-supplied I2C. Open the jumper and apply the SCL signal to the SCL pad.
On-board I2C. Connects on-board SDA signal to the SDA pad.
User-supplied I2C. Open the jumper and apply the SDA signal to the SDA pad.
Connects LDOIN input to PVDD. Do not apply power to the LDOIN pad in this case.
Does not connect LDOIN input to PVDD. Externally supply LDOIN.
Hardware shutdown of the MAX97000. MAX97000 I2C bus is not active.
Hardware enable of the MAX97000.
Closed*
Open
JU2
JU3
Closed*
Open
1-2
JU4
2-3*
*Default position.
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 9
MAX97000 Evaluation Kit
Figure 4a. MAX97000 EV Kit Schematic (Sheet 1 of 2)
10_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
MAX97000 Evaluation Kit
Figure 4b. MAX97000 EV Kit Schematic (Sheet 2 of 2)
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 11
MAX97000 Evaluation Kit
1.0”
Figure 5. MAX97000 EV Kit Component Placement Guide—Component Side
1.0”
Figure 6. MAX97000 EV Kit PCB Layout—Component Side
12_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
MAX97000 Evaluation Kit
1.0”
Figure 7. MAX97000 EV Kit PCB Layout—GND Layer 2
1.0”
Figure 8. MAX97000 EV Kit PCB Layout—GND Layer 3
ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ_ _ 13
MAX97000 Evaluation Kit
1.0”
Figure 9. MAX97000 EV Kit PCB Layout—PWR Layer 4
1.0”
Figure 10. MAX97000 EV Kit PCB Layout—GND Layer 5
14_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ
MAX97000 Evaluation Kit
1.0”
Figure 11. MAX97000 EV Kit PCB Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
15
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2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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