MAX98302EVKIT [MAXIM]
2.6V to 5.5V Single-Supply Operation;
| 型号： | MAX98302EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 2.6V to 5.5V Single-Supply Operation |
| 文件： | 总6页 (文件大小：1673K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-5218; Rev 0; 4/10
MAX98302 Evaluation Kit
General Description
Features
S 2.6V to 5.5V Single-Supply Operation
S Single-Ended or Differential Audio Input
S Five Selectable Gains
The MAX98302 evaluation kit (EV kit) is a fully assembled
and tested PCB that evaluates the MAX98302 stereo
2.4W Class D amplifier. The EV kit operates from a
single 2.6V to 5.5V DC power supply. The EV kit accepts
a differential or single-ended audio input and provides
differential outputs for the speaker. The device outputs
can be connected directly to a speaker load for filter-
less applications; however, a filter can be added to ease
evaluation.
S Filterless Operation
S Optional Class D Output Filters for Ease of
Evaluation
S Low-Power Shutdown Input
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX98302EVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
3-pin header
JU2
JU3
1
1
10FF Q20%, 10V X7R ceramic
capacitor (0805)
Murata GRM21BR71A106K
C1
C2
1
1
5-pin header
Not installed, 22FH Q20%, 1.29A
inductors
TOKO A916CY-220M
(provided with EV kit)
0.1FF Q10%, 16V X7R ceramic
capacitor (0603)
Murata GRM188R71C104K
L1–L4
0
OUTL+, OUTR+
OUTL-, OUTR-
R1, R2
2
2
2
4
Red multipurpose test points
White multipurpose test points
100kI Q5% resistors (0603)
22I Q5% resistors (0603)
1FF Q10%, 10V X7R ceramic
capacitors (0603)
Murata GRM188R61A105K
C3, C4,
C17, C18
4
0
R3, R4, R7, R8
C5, C6,
C20, C21
Not Installed, capacitors (0603)
2W Class D amplifier
(14 TDFN-EP*)
Maxim MAX98302ETD+
U1
1
0.22FF Q10%, 25V X7R ceramic
capacitors (0603)
C7–C16
10
Murata GRM188R71E224K
—
4
1
Shunts
FB1–FB4
JU1, JU4
4
2
0I Q5% resistors (0603)
PCB: MAX98302 EVALUATION
KIT+
—
2-pin headers
*EP = Exposed pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Murata Electronics North America, Inc.
TOKO America, Inc.
770-436-1300
847-297-0070
www.murata-northamerica.com
www.tokoam.com
Note: Indicate that you are using the MAX98302 when contacting these component suppliers.
_______________________________________________________________ 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.
MAX98302 Evaluation Kit
Quick Start
Detailed Description of Hardware
Recommended Equipment
Filterless Output
The MAX98302 EV kit’s filterless outputs (OUTL+,
OUTL-, OUTR+, and OUTR-) can be connected directly
to a speaker load without any filtering. Use the OUTL+
and OUTL- test points or the OUTR+ and OUTR- test
points to connect the speaker directly to the MAX98302
output.
•ꢀ 2.6V to 5.5V, 2A DC power supply
•ꢀ Stereo audio input
•ꢀ Two 8I speakers
Procedure
The MAX98302 EV kit is fully assembled and test-
ed. Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
Filtered Output
Audio analyzers typically cannot accept the Class D
amplifier’s pulse-width modulated (PWM) signals at their
inputs. Therefore, the EV kit features optional lowpass
filters at the outputs to ease evaluation. To use the
filtering output pads (FOUTL+, FOUTL-, FOUTR+, and
FOUTR-), install inductors L1–L4 (provided separately
with the EV kit), connect the loads to the output pads,
and connect the filtered outputs to the audio analyzer.
The default lowpass filters at the EV kit output are opti-
mized for an 8Ω speaker.
1) Verify that shunts are installed as follows:
JU1, JU4: Installed (single-ended input)
JU2: Pins 1-2 (device enabled)
JU3: Pins 1-3 (12dB gain)
2) Set the power-supply output to 5V. Disable the
power supply.
3) Connect the power-supply ground terminal to the
GND pad and the power-supply positive terminal to
the PVDD pad on the EV kit.
Jumper Selection
Single-Ended/Differential Audio Inputs
The EV kit features jumpers JU1 and JU4 to select
between a differential or single-ended input mode. See
Table 1 for shunt positions.
4) With the audio source disabled, connect the left
channel of the audio source to the INL+ test pad.
5) Connect the right channel of the audio source to the
INR+ test pad.
Table 1. JU1 and JU4 Jumper Selection
6) Connect the audio source ground to the GND test
pad.
SHUNT
POSITION
DEVICE
OPERATION
IN_- PIN
Installed*
Not installed
AC-grounded
Single-ended input
Differential input
7) Connect the first speaker across the OUTL+ and
OUTL- test points.
AC-coupled to user-
supplied negative
differential input
8) Connect the second speaker across the OUTR+
and OUTR- test points.
*Default position.
9) Enable the power-supply output.
10) Enable the audio source.
11) Verify that the speakers are playing the audio source
signal.
2
______________________________________________________________________________________
MAX98302 Evaluation Kit
Shutdown Function (SHDN)
Selectable Gain (GAIN)
The EV kit features 5-pin jumper JU3 to control
the MAX98302’s five programmable gain settings. See
Table 3 for gain control configuration.
The EV kit features 3-pin jumper JU2 to control the
active-low shutdown input. Drive SHDN high to place the
device in normal operation. Drive SHDN low to place the
device in the low-power shutdown mode. See Table 2 for
shunt positions.
Table 3. JU3 Jumper Selection (GAIN)
Table 2. JU2 Jumper Selection (SHDN)
SHUNT
POSITION
MAxIMUM
GAIN (dB)
SHUNT
POSITION
DEVICE
OPERATION
GAIN PIN
SHDN PIN
Connected to PVDD through
1-2*
2-3
Connected to PVDD
Connected to PGND
Normal operation
Shutdown mode
1-2
1-3*
1-4
9
100kI resistor R1
Connected to PVDD
12
15
*Default position.
Connected to PGND through
100kI resistor R2
1-5
Connected to PGND
Unconnected
18
6
Not installed
*Default position.
_______________________________________________________________________________________
3
MAX98302 Evaluation Kit
Figure 1. MAX98302 EV Kit Schematic
4
______________________________________________________________________________________
MAX98302 Evaluation Kit
1.0”
1.0”
Figure 2. MAX98302 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX98302 EV Kit PCB Layout—Component Side
1.0”
Figure 4. MAX98302 EV Kit PCB Layout—Solder Side
_______________________________________________________________________________________
5
MAX98302 Evaluation Kit
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
DESCRIPTION
0
4/10
Initial release
—
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.
6
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
2010 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
©
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