MAX98355EVKIT [MAXIM]
2.5V to 5.5V Single-Supply Operation;
| 型号： | MAX98355EVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 2.5V to 5.5V Single-Supply Operation |
| 文件： | 总16页 (文件大小：1673K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-6407; Rev 0; 7/12
Evaluates: MAX98355A/MAX98355B
Ordering Information appears at end of data sheet.
Figure 1. Simplified Block Diagram
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.
1
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
Binding posts
FOUTN, FOUTP,
GND, VDD
BCLK, LRCLK,
SDIN, USB5V,
XMCLK
4
0
Not installed, test points
FOUTN, FOUTP,
GND (x3), VDD,
+3.3V
20G plated solid copper bus
wire, 0.25in U-shaped wire
loop
7
10FF Q10%, 6.3V X5R
ceramic capacitor (0603)
Murata GRM188R60J106K
C1
1
Black multipurpose test points
(63mil drill size)
GND (x3), OUTN
J1
4
1
C2, C201, C202,
C203, C218,
C219, C220,
C222,
C225–C228,
C231–C234
USB mini-AB receptacle
0.1FF Q10%, 16V X7R
ceramic capacitors (0402)
Murata GRM155R71C104K
16
20-pin (2 x 10) IDC right-
angle, polarized boxed
header, 0.1in centers
J200
1
JU1
JU2
JU3
JU4
JU5
1
1
1
1
1
5-pin header
C3–C9, C73, C74,
C75
Not installed, ceramic
capacitors (0402)
0
3
4-pin header
9-pin (3 x 3) header
2-pin header
1FF Q10%, 6.3V X5R ceramic
capacitors (0402)
TDK C1005X5R0J105K
C200, C204,
C205
3-pin header
0.01FF Q10%, 50V X7R
ceramic capacitors (0603)
Murata GRM188R71H103K
Not installed, 22FH inductors
(6.2mm x 6.3mm)—short (PC
trace)
TOKO D63CB series part
TOKO A916CY-220M
C206, C235,
C236
3
3
L1, L2
0
1FF Q20%, 6.3V X5R ceramic
capacitors (0603)
Taiyo Yuden
C207, C208,
C213
3.3FH, 1.1A power inductor
Sumida
JMK107B7105MA
L201
1
CDRH3D16NP-3R3NC
2.2FF Q10%, 6.3V X5R
C209, C210
C212
2
1
4
1
2
2
ceramic capacitors (0603)
Murata GRM188R60J225K
LEDA, LEDB
OUTP
2
1
Green LEDs (0603)
Red multipurpose test point
(63mil drill size)
1000pF Q10%, 50V X7R
ceramic capacitor (0603)
Murata GRM188R71H102K
n-channel enhancement-
mode FETs (SOT23)
Fairchild BSS138
Q200, Q201,
Q202
3
33pF Q5%, 50V C0G ceramic
capacitors (0603)
Murata GRM1885C1H330J
C214–C217
C221
R1, R2
R3
2
1
1
0
3
1
1
1
100kI Q5% resistors (0603)
226kI Q1% resistor (0603)
634kI Q1% resistor (0603)
Not installed, resistors (0402)
0I Q5% resistors (0402)
2kI Q1% resistor (0603)
27kI Q5% resistor (0603)
100kI Q5% resistor (0603)
R4
330pF Q5%, 50V C0G
ceramic capacitor (0603)
Murata GRM1885C1H331J
R5, R6
R7, R8, R9
R10
4.7FF Q10%, 10V X5R
ceramic capacitors (0805)
Murata GRM219R61A475K
C223, C224
C229, C230
R200
R201
4.7FF Q10%, 6.3V X5R
ceramic capacitors (0603)
Murata GRM188R60J475K
R203, R204,
R207, R210,
R217, R220
6
10kI Q5% resistors (0603)
D200
1
2
Red LED (0603)
R205, R213
R206
2
1
1
0
1
47kI Q5% resistors (0603)
4.7I Q5% resistor (0603)
20kI Q5% resistor (0603)
Not installed, resistor (0603)
8.06kI Q1% resistor (0603)
FB1, FB2
0I Q5% resistors (0603)
R208
Ferrite beads (0603)
Murata BLM18KG331SN1
FB200, FB201
2
R209
R211
2
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Component List (continued)
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
QTY
DESCRIPTION
R212, R219,
R233, R234
Dual, unbuffered inverter
(6 SC70)
4
1kI Q5% resistors (0603)
U208
1
Fairchild NC7WZU04P6X
R218, R221
R222
2
1
2
2.2MI Q5% resistors (0603)
470I Q5% resistor (0603)
33I Q5% resistors (0603)
2-input multiplexer (6 SC70)
Fairchild NC7SZ157P6X
U209
U210
1
1
R223, R224
I2S input Class D audio
amplifier (9 WLP)
Dual logic buffer (6 SC70)
Fairchild NC7WZ17P6X
U1
1
Maxim MAX98355AEWL+
Microprocessor-reset circuit
(3 SC70)
Maxim MAX803TEXR+
U211
U212
1
1
U200
U201
1
1
XMOS processor (128 TQFP)
SPI 1Mb flash memory
(8 SO)
1A step-down regulator
M
(10 FMAX )
USB 2.0 transceiver, ULPI
(24 QFN)
U202
U203
1
1
Maxim MAX1974EUB+
13MHz clock oscillator
(2.5mm x 2.0mm)
3.3V low-noise linear regulator
(5 SOT23)
Maxim MAX8887EZK33+T
Y1
1
1
24.576MHz crystal
(6.0mm x 3.3mm)
Y200
1.8V low-noise linear regulator
(5 SC70)
Maxim MAX8511EXK18+
U204
U205
U206
1
1
1
11.2896MHz crystal
(6.0mm x 3.3mm)
Y201
—
1
4
1
Shunts
Voltage detector (5 SOT23)
PCB: MAX98355
EVALUATION KIT
TinyLogic UHS dual buffer
(6 SC70)
—
Fairchild NC7WZ07P6X
Optional Components
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
L1, L2
QTY
DESCRIPTION
22FH, 1A inductors
(6.2mm x 6.3mm)
0.22FF Q10%, 6.3V XR5
ceramic capacitors (0402)
TDK C1005X5R0J224K
C3–C7
5
2
2
TOKO A916CY-220M
R5, R6
22I Q5% resistors (0402)
Component Suppliers
SUPPLIER
PHONE
WEBSITE
Fairchild Semiconductor
Murata Electronics North America, Inc.
Sumida Corp.
888-522-5372
770-436-1300
847-545-6700
800-348-2496
847-803-6100
847-297-0070
www.fairchildsemi.com
www.murata-northamerica.com
www.sumida.com
Taiyo Yuden
www.t-yuden.com
TDK Corp.
www.component.tdk.com
www.tokoam.com
TOKO America, Inc.
Note: Indicate that you are using the MAX98355 when contacting these component suppliers.
µMAX is a registered trademark of Maxim Integrated Products,
Inc.
3
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Quick Start
Detailed Description of Hardware
Recommended Equipment
Filterless Output
The MAX98355 EV kit’s filterless outputs (OUTP, OUTN)
can be connected directly to a speaker load without any
filtering. Use the OUTP and OUTN test points to connect
the speaker directly to the device output.
•ꢀ MAX98355ꢀEVꢀkit
•ꢀ 2.5Vꢀtoꢀ5.5V,ꢀ2AꢀDCꢀpowerꢀsupply
•ꢀ USBꢀaudioꢀsourceꢀ(fromꢀcomputerꢀthroughꢀanꢀaudioꢀ
M
M
media player such as iTunes or Windows Media
Player)
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. As shipped, the
EV kit’s lowpass filter RC components are unpopulated
and L1, L2 are shorted on the PCB.
•ꢀ USBꢀcableꢀ(includedꢀinꢀtheꢀEVꢀkitꢀbox)
•ꢀ 4I to 8I speaker
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 necessary connections are
completed.
To use the filtered output posts (FOUTP, FOUTN), remove
the shorts on L1 and L2 and install components L1, L2,
C3–C7, and R5, R6 (provided separately with the EV kit).
Use the output posts to connect the filtered outputs to
the audio analyzer. The default lowpass filters at the EV
kit output are optimized for a 4I speaker.
1) Verify that shunts are installed as follows:
JU1: Pins 1-5 (12dB gain)
JU2: Pins 1-3 (left audio channel selected)
JU3: Pins 2-3 (I2S input from XMOS, MAX98355A only)
Jumper Selection
JU4: Installed (VDDIO supplied from on-board
power supply
Selectable Gain (GAIN)
The EV kit features a 5-pin jumper (JU1) to control the
device’s five programmable gain settings. See Table 1
for gain-control configuration.
JU5: Pins 2-3 (device in shutdown mode)
2) Set the power-supply output to 5V. Disable the power
supply.
SD_MODE Input
The EV kit features a 4-pin jumper (JU2) to control the
audio channel that is sent to the amplifier output and a
3-pin jumper (JU5) to enable/disable the IC. JU2 is used
to select the stereo input (left channel, right channel, or the
average of the left/right channels). JU5 must be set to pins
1-2 for normal operation. See Table 2 for shunt positions.
3) Connect the power-supply ground terminal to the
GND PCB pad and the power-supply positive terminal
to the VDD PCB pad on the EV kit.
4) Connect the speaker across the OUTP and OUTN test
points.
5) Enable the power-supply output.
Shutdown Mode
The device features a low-power shutdown mode that is
activated by setting jumper JU5 to pins 2-3. To exit shut-
down mode, set JU5 to pins 1-2 and select the desired
stereo input channel using jumper JU2. See Table 3 for
shunt positions.
6) With the audio source disabled, connect the USB
audio source to J1 on the EV kit. Change the shunt on
JU5 to pins 1-2 (device enabled for normal operation).
7) Enable the audio source.
8) Verify that the speakers are playing the audio source
signal.
Table 1. JU1 Jumper Selection (GAIN)
GAIN (dB)
SHUNT POSITION
GAIN PIN
RELATIVE TO A 2.1dBV
REFERENCE LEVEL
1-2
1-3
Connected to VDD through 100kI resistor R1
3
6
Connected to VDD
Connected to GND through 100kI resistor R2
Connected to GND
1-4
15
12
9
1-5*
Not installed
Unconnected
*Default position.
iTunes is a registered trademark of Apple Inc.
Windows is a registered trademark and registered service mark of Microsoft Corp.
4
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Driving I2S Directly
The EV kit provides an on-board XMOS chip to gener-
ate the I2S signal from the USB audio source. To utilize
the XMOS chip, all positions of jumper JU3 must be set
betweens pins 2-3. To bypass the XMOS and drive the
digital audio interface directly, remove the shunts from
JU3 and apply signals at the BCLK, LRCLK, and SDIN
test points or between JU3 pins 1-2 at the appropri-
ate locations (pin 1 is signal ground). The XMOS chip
is configured for I2S output so it cannot be used with
the MAX98355B (left-justified data). To evaluate the
MAX98355B with left-justified data or the MAX98355A/
MAX98355B with TDM data, use the external data input
option by removing the shunts from JU3 pins 2-3 and
drive the digital audio interface directly.
External/Internal VDDIO (+3.3V)
On the EV kit, a logic voltage from a control interface is
needed for proper selection of the stereo input channel
through SD_MODE. This voltage can be applied exter-
nally at the +3.3V PCB pad or it can be provided from
on-board circuitry. See Table 4 for shunt positions.
If the USB cable is disconnected (such as when the
XMOS chip is not in use), the on-board circuitry to gener-
ate the +3.3V is not available. In this case, remove the
shunt from jumper JU4 and supply an external voltage at
the +3.3V PCB pad. Logic voltages other than +3.3V can
be used on the EV kit. If other logic voltages are used,
resistors R3 and R4 must be adjusted. See the SD_MODE
and Shutdown Operation section in the MAX98355A/
MAX98355B IC data sheet for more information.
Table 2. JU2 and JU5 Jumper Selection (SD_MODE)
SHUNT POSITION
DEVICE OPERATION
SD_MODE PIN
JU2
1-2
JU5
1-2*
1-2*
Connected to VDDIO through R3 (226kI resistor)
Right audio channel selected
Left audio channel selected
1-3*
Connected to VDDIO
Mono mix
(left + right)/2
1-4
X
1-2*
2-3
Connected to VDDIO through R4 (634kI resistor)
Connected to GND
Shutdown
*Default position.
X = Don’t care.
Table 3. JU3 Jumper Selection (Digital Audio Interface)
SHUNT POSITION
BCLK, LRCLK, DIN
DEVICE OPERATION
2-3*
Connected to XMOS
XMOS IC provides I2S input data to the MAX98355A.
Use this configuration when connecting an external digital audio source to the
MAX98355A or when evaluating the MAX98355B.
Not installed
Unconnected
Connect external BCLK/LRCLK/DIN to column 2 and GND to column 1.
*Default position.
Table 4. JU4 Jumper Selection (VDDIO)
SHUNT POSITION
LOGIC VOLTAGE (VDDIO)
Installed*
3.3V supplied from on-board power supply.
Not installed
User-supplied external power supply applied at the +3.3V PCB pad.
*Default position.
5
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2a. MAX98355 EV Kit Schematic (Sheet 1 of 6)
6
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2b. MAX98355 EV Kit Schematic (Sheet 2 of 6)
7
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2c. MAX98355 EV Kit Schematic (Sheet 3 of 6)
8
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2d. MAX98355 EV Kit Schematic (Sheet 4 of 6)
9
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2e. MAX98355 EV Kit Schematic (Sheet 5 of 6)
10
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Figure 2f. MAX98355 EV Kit Schematic (Sheet 6 of 6)
11
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
1.0”
Figure 3. MAX98355 EV Kit Component Placement Guide—Component Side
1.0”
Figure 4. MAX98355 EV Kit PCB Layout—Component Side
12
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
1.0”
Figure 5. MAX98355 EV Kit PCB Layout—Layer 2
1.0”
Figure 6. MAX98355 EV Kit PCB Layout—Layer 3
13
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
1.0”
Figure 7. MAX98355 EV Kit PCB Layout—Solder Side
1.0”
Figure 8. MAX98355 EV Kit Component Placement Guide—Solder Side
14
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Ordering Information
PART
TYPE
MAX98355EVKIT#
EV Kit
#Denotes RoHS compliant.
15
MAX98355 Evaluation Kit
Evaluates: MAX98355A/MAX98355B
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
DESCRIPTION
CHANGED
0
7/12
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.
Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
16
©
2012 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
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