19-3911; Rev 1; 9/07
MAX9851 Evaluation Kit/Evaluation System
General Description
The MAX9851 evaluation system (MAX9851EVCMODU)
consists of a MAX9851 evaluation kit (EV kit), a compan-
ion Maxim command module (CMODUSB) interface
board, and software. The MAX9851 EV kit is a fully
assembled and tested surface-mount printed-circuit
board (PCB) that evaluates the MAX9851 stereo audio
GSM/GPRS/EDGE CODEC with microphone inputs,
DirectDrive
TM
headphone amplifiers, receiver amplifier,
and stereo speaker amplifiers. The EV kit is designed to
send and receive digital audio data in the Sony/Philips
digital interface (S/PDIF) format and can be optionally
configured to communicate using generic digital audio
or I
2
S-compatible signals. The EV kit provides RCA jacks
for connecting analog input signals and digital S/PDIF
signals. A 3.5mm headphone jack provides easy con-
nection of headphones to the PCB. The Maxim com-
mand module interface board (CMODUSB) provides an
I
2
C interface through a PC serial or USB port. Windows
®
98/2000/XP-compatible software, which can be down-
loaded from the Maxim website, provides a user-friendly
interface to exercise the features of the MAX9851. The
program is menu driven and offers a graphical user inter-
face (GUI) with control buttons and a status display. The
MAX9851EVCMODU includes the EV kit and the
CMODUSB interface board. Order the MAX9851EVKIT if
no Maxim command module interface is needed.
Note:
The MAX9851 EV kit software is provided with the
MAX9851EVKIT; however, the CMODUSB board is required to
interface the EV kit to the computer when using the included
software.
Windows is a registered trademark of Microsoft Corp.
Features
♦
3.5V to 5.5V Single-Supply Operation
♦
I
2
C 2-Wire Serial Interface
♦
Electrical S/PDIF Input/Output
♦
On-Board 26MHz Crystal Oscillator
♦
Two On-Board S/PDIF Digital Audio Receivers
♦
One On-Board S/PDIF Digital Audio Transmitter
♦
On-Board Power-Management IC
♦
Isolation Header for Direct Communication with
the MAX9851 I
2
C and Digital Audio Interfaces
♦
Easy-to-Use Menu-Driven Software
♦
Assembled and Tested
♦
Includes Windows 98/2000/XP-Compatible
Software and Demo PCB to Evaluate the MAX9851
Evaluate: MAX9851
Ordering Information
PART
MAX9851EVKIT
MAX9851EVCMODU
TYPE
EV Kit
EV System
System Diagram
POWE
SOFTWARE
REQUIRED
R
ANALOG INPUTS
SERIAL/USB CABLE
COMMAND
MODULE
EV KIT
ANALOG OUTPUTS
S/PDIF DIGITAL
INPUTS AND OUTPUTS
________________________________________________________________
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.
MAX9851 Evaluation Kit/Evaluation System
Evaluate: MAX9851
Component List
DESIGNATION
QTY
DESCRIPTION
DESIGNATION
C52, C56, C60, C64,
C82
C53, C57, C61, C93
C54, C58, C62, C65,
C67, C70, C73, C79
J1
J2, J3
J4
J5
J6
J7
J8, J9
1.0µF ±10%, 6.3V X5R ceramic
capacitors (0402)
TDK C1005X5R0J105M
JU1
JU2–JU8
L1, L2
13
0.01µF ±5%, 25V C0G ceramic
capacitors (0603)
TDK C1608C0G1E103J
1000pF ±5%, 50V C0G ceramic
capacitors (0603)
TDK C1608C0G1H102J
0.022µF ±20%, 25V X7R
ceramic capacitors (0402)
TDK C1005X7R1E223K
0.22µF ±10%, 6.3V X5R ceramic
capacitor (0402)
TDK C1005X5R0J224K
Not installed, capacitors (0603)
0.1µF ±10%, 10V X5R ceramic
capacitors (0402)
TDK C1005X5R1A104K
R1, R2, R17,
R18, R19, R22
R4, R8
R5, R9
R6, R10, R12, R15
R7, R11
R13
R14
R16
R20, R23
R21
QTY
DESCRIPTION
220µF ±20%, 6.3V tantalum
capacitors (C-case)
AVX TPSC227M006R0250 or
AVX TPSC227M006R0100
Not installed, capacitors (C-case)
10µF ±20%, 6.3V X5R ceramic
capacitors (0805)
TDK C2012X5R0J106M
Stereo headphone jack
(3.5mm diameter)
Phono jacks (side-entry PCB
mount) yellow
Phono jack (side-entry PCB
mount) black
SMA PC-mount connector
Not installed, jumper
2 x 10 right-angle female
receptacle
Phono jacks (side-entry PCB
mount) white
Jumper, dual-row, 28-pin header
Jumpers, 2-pin headers
3.3µH ±10%, 270mA inductors
(1812)
Coilcraft 1812CS-332XKB
Not installed, resistors (0603)
75Ω ±5% resistors (0603)
4.7kΩ ±5% resistors (0603)
47kΩ ±5% resistors (0603)
3.01kΩ ±1% resistors (0603)
243Ω ±1% resistor (0603)
107Ω ±1% resistor (0603)
0Ω ±5% resistor (1206)
10kΩ ±5% resistors (0603)
2.4kΩ ±1% resistor (0603)
REQUIRED COMPONENTS
C1, C5, C6
3
0.1µF ±10%, 10V X5R ceramic
capacitors (0402)
TDK C1005X5R1A104K
1.0µF ±10%, 6.3V X5R ceramic
capacitors (0402)
TDK C1005X5R0J105M
1.0µF ±10%, 6.3V X5R ceramic
capacitor (0603)
TDK C1608X5R0J105K
0.22µF ±20%, 16V X7R ceramic
capacitor (0603)
TDK C1608X7R1C224M
10µF ±20%, 6.3V X5R
ceramic capacitor (0805)
TDK C2012X5R0J106M
1.0kΩ ±5% resistor (0603)
10kΩ ±5% resistor (0603)
2
1
7
2
5
0
8
C2, C3, C4, C7,
C9–C19, C94
16
C8
1
1
2
1
1
0
1
C20
1
C54
R3
R20
1
1
1
SUPPORT COMPONENTS
C21, C22, C23, C28,
C29, C30, C38, C39,
C55, C59, C63, C68,
C71, C76, C77, C78
C24, C25, C31, C32,
C37, C66, C69, C72,
C74, C80, C86, C88,
C90
16
0
2
2
4
2
1
1
1
2
1
C26, C33
2
C27, C34
2
C35
C36, C81
C40–C51, C75, C83,
C84, C85, C87, C89,
C91, C92
1
0
20
2
_______________________________________________________________________________________
MAX9851 Evaluation Kit/Evaluation System
Component List (continued)
DESIGNATION
R24
R25, R26
R27–R34
R35–R38
T1
QTY
1
2
8
4
1
DESCRIPTION
510Ω ±5% resistor (0603)
100kΩ ±5% resistors (0603)
10kΩ ±5% resistors (0402)
0Ω ±5% resistors (0603)
Digital audio transformer
Scientific Conversion SC979-03
Stereo audio CODEC (48-pin
TQFN) 7mm x 7mm x 0.8mm
Maxim MAX9851ETM
192kHz digital audio receivers
(28-pin TSSOP)
Cirrus Logic CS8416-CZ
192kHz digital audio transmitter
(28-pin TSSOP)
Cirrus Logic CS8406-CZ
Phase-locked loop (14-pin
TSSOP)
Texas Instruments TLC2933IPW
U14
1
U7
1
DESIGNATION
U6
QTY
1
DESCRIPTION
XC9500XL series CPLD
Xilinx XC9536XL-7VQ44C
Level translator (10-pin µMAX
®
)
Maxim MAX1840EUB
Dual-bit, dual-supply level
translators (8-pin SSOP)
Texas Instruments
SN74AVC2T45DCTR
Power-management IC (20-pin
QFN) 5mm x 5mm x 0.9mm
Maxim MAX1799AEGP
I
2
C to parallel converter
(16-pin QSOP)
Maxim MAX1609EEE
26MHz crystal clock oscillator
AVX K53-3C0-SE26
Shunts
PCB: MAX9851 Evaluation Kit
Evaluate: MAX9851
U8–U13, U16
7
U1
1
U2, U3
2
U15
1
U4
1
Y1
See table for
jumper settings
—
1
19
1
U5
1
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Component Suppliers
SUPPLIER
AVX Corp.
Coilcraft, Inc.
Scientific Conversion
TDK Corp.
PHONE
843-946-0238
847-639-6400
415-892-2323
847-803-6100
FAX
843-626-3123
847-639-1469
—
847-390-4405
WEBSITE
www.avxcorp.com
www.coilcraft.com
www.scientificonversion.com
www.component.tdk.com
Note:
Indicate that you are using the MAX9851 when contacting these component suppliers.
_______________________________________________________________________________________
3
MAX9851 Evaluation Kit/Evaluation System
Evaluate: MAX9851
Quick Start
Recommended Equipment
• Computer running Windows 98, 2000, or XP
• Standard USB peripheral cable
• CMODUSB command module
• One 5.0V/2A DC power supply
• One pair of headphones (16Ω or greater)
• One analog audio source
• Three RCA interconnect cables
Refer to the MAX9851/MAX9853 data sheet while using this
EV kit for detailed descriptions of the CODEC’s features.
3) Carefully align the 20-pin connector of the
MAX9851 EV kit with the 20-pin header of the
CMODUSB interface board. Gently press them
together.
4) Launch the INSTALL.EXE on the included CD to
copy the files, install drivers for the CMODUSB
board, and create icons in the Windows 98/2000/XP
Start menu.
5) Turn on the 5.0V power supply.
6) Connect the USB cable between the PC USB port
and the CMODUSB command module.
7) Start the MAX9851 program by opening its icon in
the Start menu or launching the executable. Verify
normal device operation by the “Status: MAX9851
Operational” text in the Interface box.
Verification of Board Operation
1) Connect a single RCA cable between S/PDIF IN1
and S/PDIF OUT.
2) Connect a stereo analog audio source to LINEIN1
and LINEIN2.
3) Insert a pair of headphones into the HEADPHONE jack.
4) Enable the stereo audio source.
5) Use the auto-setup feature in the software to auto-
configure the MAX9851.
6) Audio will output at the headphone and speaker
amplifiers.
7) Repeat steps 1 through 5 using S/PDIF IN2.
Procedure
The MAX9851 EV kit is fully assembled and tested.
Follow the steps below to verify board operation in an
analog input, digital loopback, analog output mode.
Once the board has been set up, verify that the board
is operating properly before beginning an evaluation.
Do not turn on the power supply until all connec-
tions are completed.
Command Module Setup
1) Set both switches (SW1) to the ‘on’ position to
enable the SDA/SCL pullup resistors on the com-
mand module.
2) Install a shunt across pins 2-3 of the VDD select
jumper (J1) to set the command module working
voltage to 3.3V.
3) To avoid damaging the EV kit or the computer, do
not connect the USB cable until power has been
applied to the EV kit.
EV Kit Setup
1) Install a shunt on each of the following jumpers:
JU4, JU5, JU6, JU7, and each row of JU1 across
pins 1-2.
2) Connect the 5V power supply between the PMIC
and AGND pads.
Detailed Description of Software
Autosetup
Click the
Auto-Setup
button to allow the EV kit to auto-
matically detect incoming digital signals and configure
itself appropriately. The software follows the flow chart
in Figure 1 during autosetup.
4
_______________________________________________________________________________________
MAX9851 Evaluation Kit/Evaluation System
Evaluate: MAX9851
BEGIN AUTOSETUP
IS THERE
SIGNAL AT
EITHER
S/PDIF INPUT?
NO
ENABLE THE DIGITAL
OUTPUT ON S1.
ENABLE THE ANALOG
LINE INPUTS AND THE
EXTMIC INPUT.
YES
ENABLE THE
APPROPRIATE DIGITAL
INPUT. ENABLE THE
SPEAKER AND
HEADPHONE
OUTPUTS.
IS S/PDIF OUT CONNECTED TO
EITHER S/PDIF INPUT?
YES
ENABLE THE APPROPRIATE DIGITAL
INPUT CONFIGURING THE MAX9851
FOR LOOPBACK THROUGH THE
S/PDIF INTERFACE. ENABLE THE
ANALOG LINE INPUTS AND THE
EXTMIC INPUT. ENABLE THE
SPEAKER AND HEADPHONE
OUTPUTS.
NO
END AUTOSETUP
ENABLE DIGITAL
OUTPUT ON THE SAME
CHANNEL ALREADY
IN USE. ENABLE THE
ANALOG LINE INPUTS
AND THE EXTMIC
INPUT. DEFAULTS TO
S1 IF BOTH CHANNELS
ARE IN USE.
DISABLE ALL DIGITAL
INPUTS. ENABLE THE
DIGITAL OUTPUT ON
S1. ENABLE THE
ANALOG LINE INPUTS
AND THE EXTMIC
INPUT.
END AUTOSETUP
AUTO-SETUP
END AUTOSETUP
Figure 1. Autosetup Routine Flow Chart
_______________________________________________________________________________________
5
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