MAX13331EVKIT+ [MAXIM]
Low-Profile (1.2mm, max) Design;
| 型号： | MAX13331EVKIT+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Low-Profile (1.2mm, max) Design |
| 文件： | 总7页 (文件大小：134K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4499; Rev 1; 4/09
MAX13331 Evaluation Kit
Evluates:0/MAX31
General Description
Features
♦ No DC-Blocking Capacitors Required
♦ 4V to 5.5V Single-Supply Operation
♦ Adjustable Gain (MAX13331 Only)
♦ 125mW Per Channel into 32Ω at 0.01% THD+N
♦ Shutdown Control
The MAX13331 evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount circuit board that evalu-
ates the MAX13331 DirectDrive® stereo headphone
amplifier. DirectDrive eliminates the two large DC-
blocking capacitors typically required between the out-
put of the amplifier and the headphones. The
MAX13331 EV kit includes two RCA phono jacks on the
input and a 3.5mm headphone jack on the output to
facilitate easy connections to the circuit board.
♦ Ultra-Compact Solution
The MAX13331 EV kit can also evaluate the MAX13330
IC. This requires the IC replacement of U1.
♦ Low-Profile (1.2mm, max) Design
♦ Lead(Pb)-Free and RoHS Compliant
♦ Fully Assembled and Tested Surface-Mount Board
Ordering Information
PART
TYPE
MAX13331EVKIT+
EV Kit
DirectDrive is a registered trademark of Maxim Integrated
Products, Inc.
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
J1
1
1
3.5mm stereo headphone jack
1µF 10ꢀ, 1ꢁV XꢂR ceramic
capacitors (0ꢁ03)
JU1
2-pin header, 0.1in centers
C1, C2
2
3
3
3
Murata GRM188Rꢂ1C105K
TDK C1ꢁ08XꢂR1C105K
Not installed, 2-pin header, 0.1in
centers
JU2
0
0
1
1
1000pF 10ꢀ, 50V XꢂR ceramic
capacitors (0402)
Murata GRM155Rꢂ1H102K
TDK C1005XꢂR1H102K
OUTL, OUTR,
SGND
Not installed, miniature test points
C3, C4, C11
C5, Cꢂ, C8
Cꢁ, C9, C14
RCA phono jack (side-entry PCB
mount), white
P1
P2
1µF 10ꢀ, 10V XꢂR ceramic
capacitors (0ꢁ03)
Murata GRM188Rꢂ1A105K
TDK C1ꢁ08XꢂR1A105K
RCA phono jack (side-entry PCB
mount), red
R1, R2, R5
R3, R4
3
2
15kΩ 1ꢀ resistors (0402)
22.ꢁkΩ 1ꢀ resistors (0402)
0.1µF 10ꢀ, 1ꢁV XꢂR ceramic
capacitors (0402)
Murata GRM155Rꢂ1C104K
TDK C1005XꢂR1C104K
Automotive DirectDrive headphone
amplifier (1ꢁ QSOP)
U1
1
Maxim MAX13331GEE/V+
—
—
1
1
Shunt
10µF 10ꢀ, 10V XꢂR ceramic
capacitor (0805)
Murata GRM21BRꢂ1A10ꢁK
C10
1
2
PCB: MAX13331 EVALUATION KIT+
0.01µF 10ꢀ, 50V XꢂR ceramic
capacitors (0402)
C12, C13
Murata GRM155Rꢂ1H103K
________________________________________________________________ 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.
MAX13331 Evaluation Kit
Component Suppliers
SUPPLIER
Murata Electronics North America, Inc.
TDK Corp.
PHONE
WEBSITE
ꢂꢂ0-43ꢁ-1300
84ꢂ-803-ꢁ100
www.murata-northamerica.com
www.component.tdk.com
Note: Indicate that you are using the MAX13331 when contacting these component suppliers.
Quick Start
Required Equipment
Detailed Description of Hardware
The MAX13331 EV kit is a stereo, single-supply head-
phone amplifier. The input impedance is 15kΩ. The
-3dB corner frequencies are approximately 10Hz and
greater than 22kHz and are dependent on components
R1/C1 and R2/C2. The MAX13331 EV kit has a gain of
approximately 1.5 and can be powered with a 4V to
5.5V supply
•
•
One pair of 8Ω to 32Ω headphones
One variable DC power supply capable of supply-
ing between 4V and 5.5V at 500mA
•
One stereo audio source
Procedure
The EV kit provides two RCA phono jacks (P1 and P2)
to facilitate the connection of an audio source. In addi-
tion, both outputs (OUTL and OUTR) are routed to a
stereo headphone jack (J1), facilitating output monitor-
ing. Shutdown control of OUTL and OUTR is also pro-
vided through jumper JU1.
The MAX13331 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) Plug the headphones into the 3.5mm headphone
jack (J1).
Shutdown Control
The MAX13331 EV kit provides jumper JU1 to disable
the outputs, OUTL and OUTR (see Table 1 for shut-
down shunt positions). Both OUTL and OUTR are rout-
ed to the headphone jack (J1).
2) Ensure that the stereo audio source is turned off.
3) Connect the disabled stereo audio source through
the RCA phono jacks (P1 and P2).
4) Ensure that a shunt is installed on jumper JU1.
5) Connect the 4V to 5.5V DC power supply to the
VDD and PGND pads.
Layout Considerations
To optimize the audio performance of the MAX13331, it is
important to follow these layout guidelines. The MAX13331
EV kit uses two ground planes to minimize switching noise.
The two planes are star-connected at one point (JU2 pad).
Capacitors C5, Cꢁ, C8, C12, C13, and C14 should be
placed close to the IC. Refer to the MAX13331 IC data
sheet for additional layout considerations.
Evluates:0/MAX31
ꢁ) Turn on the DC power supply.
ꢂ) Verify that the audio source level is low.
8) Enable the stereo audio source.
9) Verify that the audio source signal is clearly heard
from the headphones.
The MAX13331 EV kit is a four-layer design, but it is
possible to design the MAX13331 circuit on to a two-
layer board. For a two-layer design, optimize the signal
and power ground planes by maximizing the area and
connecting each plane, as close as possible, to its
respective IC pin.
Table 1. Jumper JU1 Function
SHUNT POSITION
Installed
DESCRIPTION
Outputs enabled
Outputs disabled
Not installed
2
_______________________________________________________________________________________
MAX13331 Evaluation Kit
Evluates:0/MAX31
Figure 1. MAX13331 EV Kit Schematic
_______________________________________________________________________________________
3
MAX13331 Evaluation Kit
Figure 2. MAX13331 EV Kit Component Placement Guide—Component Side
Evluates:0/MAX31
Figure 3. MAX13331 EV Kit PCB Layout—Component Side
4
_______________________________________________________________________________________
MAX13331 Evaluation Kit
Evluates:0/MAX31
Figure 4. MAX13331 EV Kit PCB Layout—Internal Layer 2
Figure 5. MAX13331 EV Kit PCB Layout—Internal Layer 3
_______________________________________________________________________________________
5
MAX13331 Evaluation Kit
Figure ꢁ. MAX13331 EV Kit PCB Layout—Solder Side
Evluates:0/MAX31
Figure ꢂ. MAX13331 EV Kit Component Placement Guide—Solder Side
6
_______________________________________________________________________________________
MAX13331 Evaluation Kit
Evluates:0/MAX31
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
DESCRIPTION
CHANGED
0
3/09
Initial release
—
Updated schematic and PCB layout diagrams with routing changes on jacks P1 and
P2
1
4/09
3–ꢁ
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 _____________________ 7
© 2009 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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