MAX98088EWY+T - Maxim

_______________________________________________________________ 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.

MAX98088 Evaluation Kit

Evaluates: MAX98088

General Description

The MAX98088 evaluation kit (EV kit) is a fully assembled

and tested circuit board that evaluates the MAX98088

audio codec. The MAX98088 IC is an integrated audio

codec including microphone amplifiers, line amplifiers,

an earpiece amplifier, stereo Class D amplifiers, stereo

DirectDriveM headphone amplifiers, and digital signal

processing. The EV kit also includes Windows XPM-,

Windows VistaM-, and WindowsM 7-compatible software

that provides a simple graphical user interface (GUI) for

exercising the features of the IC.

The EV kit provides access to all analog and digi-

tal inputs/outputs on the IC. To enable easy con-

nection to a wide range of audio sources, audio

devices are included to convert both USB data and

S/PDIF data to I2S.

The EV kit integrates a MAXQ2000 microcontroller to

enable I2C communication with devices on the EV kit.

The EV kit software, running on a Windows PC, commu-

nicates with the EV kit over a standard USB port. The EV

kit software provides an intuitive interface to exercise the

functions of the IC.

The EV kit comes with a MAX98088EWY+ installed.

Features

S 2.8V to 5.5V Single-Supply Operation

S Proven Audio PCB Layout

S On-Board USB-to-I2C Interface Circuit

S On-Board USB-to-I2S Converter

S On-Board S/PDIF Transceiver

S On-Board Clock Source

S On-Board Digital Microphone

S Evaluates the MAX98088EWY+ in a 3.8mm x

3.3mm, 63-Bump WLP Package

S Windows XP-, Windows Vista-, and Windows

7-Compatible Software

S Fully Assembled and Tested

19-5487; Rev 0; 8/10

DirectDrive is a registered trademark of Maxim Integrated Products, Inc.

Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp.

Figure 1. Block Diagram

Ordering Information

+Denotes lead(Pb)-free and RoHS compliant.

DIGITAL

MIC INPUT

DIGITAL

MIC

DIGITAL

MIC

INPUT

POWER

STEREO ADC

USB OPTICAL USBOPTICAL

STEREO ADC

CONTROL

1.8V I2C I2S I2S

DIGITAL AUDIO

INTERFACE

FIXED-FUNCTION

DSP

DIGITAL AUDIO

INTERFACE

S/PDIF

TRANSCEIVER USB TO I2S

MIC

INPUT

MIC/LINE

INPUT

LINE

INPUT

EARPIECE/

LINE OUTPUT

CLASS D

AMPLIFIER

CLASS D

AMPLIFIER

CLASS H

AMPLIFIER

CHARGE

PUMP

MAX98088

BYPASS

MICRO-

CONTROLLER

POWER

SUPPLY

2.8V TO 5.5V

PART TYPE

MAX98088EVKIT+ EV Kit

MAX98088 Evaluation Kit

Evaluates: MAX98088

2 ______________________________________________________________________________________

Component List

DESIGNATION QTY DESCRIPTION

C1, C2, C52,

C70 4

10FF Q20% 6.3V X5R ceramic

capacitors (0805)

TDK C2012X5R0J106M

C3, C10, C11,

C21, C22, C27,

C29, C35, C40,

C42, C44–C47,

C51

0.1FF Q10%, 50V X5R ceramic

capacitors (0603)

TDK C1608X5R1H104K

C4–C9,

C122–C125 10

10pF Q5% 50V C0G ceramic

capacitors (0402)

Murata GRM1555C1H100J

C12, C55, C56,

C69 4

0.1FF Q10%, 10V X7R ceramic

capacitors (0402)

KEMET C0402C104K8RAC

C14, C15, C23,

C25, C43, C50,

C53, C54

1FF Q20% 6.3V X5R ceramic

capacitors (0603)

Taiyo Yuden JMK107B7105MA

C19, C20, C31,

C32, C57 5

0.01FF Q10% 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H103K

C24, C26 2

2.2FF Q10%, 6.3V X5R ceramic

capacitors (0603)

Murata GRM188R60J225K

C28 1

47000pF Q10%, 25V X7R

ceramic capacitor (0603)

Murata GRM188R71E473K

C30 1

0.47FF Q10%, 6.3V X5R ceramic

capacitor (0603)

Murata GRM188R60J474K

C36, C41, C73,

C74 4

8pF Q0.5pF, 50V C0H ceramic

capacitors (0402)

Taiyo Yuden UMK105CH080DV

C38, C58–C65,

C119, C120,

C132, C133

0Not installed, ceramic capacitors

(0402)

C39 1

0.033FF Q10%, 25V X7R ceramic

capacitor (0603)

Murata GRM188R71E333K

C48, C49 2

18pF Q5%, 50V C0G ceramic

capacitors (0603)

TDK C1608C0G1H180J

DESIGNATION QTY DESCRIPTION

C66, C72 2

47FF Q20%, 6.3V X5R ceramic

capacitors (1206)

Murata GRM31CR60J476M

C67, C68, C71,

C77, C78, C92,

C93, C101–

C104, C114–

C118, C121,

C126–C129,

C131

1FF Q10%, 6.3V X5R ceramic

capacitors (0402)

TDK C1005X5R0J105K

C88–C91,

C134–C139 10

0.22FF Q10%, 6.3V X5R ceramic

capacitors (0402)

TDK C1005X5R0J224K

C100 1

10FF Q20% 6.3V X5R ceramic

capacitor (0603)

Murata GRM188R60J106M

C130 1

2.2FF Q20%, 6.3V X5R ceramic

capacitor (0402)

Taiyo Yuden JMK105BJ225MV

D1 1 Yellow LED (0603)

D2 1 Red LED (0603)

EXTMICN,

EXTMICP 0 Not installed, test points

FB1, FB2 2 Ferrite beads (0603)

Murata BLM18PG221SN1

FB3–FB10 8 Ferrite beads (0402)

Murata BLM15HD182SN1

FB11, FB12,

FB14, FB15 40I Q5% resistors (0603)

FB13, FB16 2 0I Q5% resistors (0402)

HPL, HPR,

SPKLP, SPKRP 4 Red multipurpose test points

J1, J10 2 USB mini-B right-angle PC-mount

receptacles

J2 1 3.5mm surface-mount stereo

headphone jack, 4 positions

J5 1 Digital audio optical transmitter

Toshiba TOTX147L

J6 1 Digital audio optical receiver

Toshiba TORX147L

J12–J15 4 Red RCA jacks

JU12 1 4-pin, 3-way header

MAX98088 Evaluation Kit

Evaluates: MAX98088

_______________________________________________________________________________________ 3

Component List (continued)

DESIGNATION QTY DESCRIPTION

JU13, JU19 2 12-pin (3 x 4) headers

JU14–JU17,

JU22, JU27,

JU28, JU30,

JU32, JU34–

JU37, JU40,

JU41, JU42

16 2-pin headers

JU20 1 6-pin (2 x 3) header

L1 1 47FH, 220mA inductor (1812)

Murata LQH43MN470J03L

L2–L5 0

Not installed, inductors

(6.2mm x 6.3mm)

TOKO D63CB series (22FH)

P101 1

-20V, -2.4A p-channel MOSFET

(Super SOT3)

Fairchild FDN304P

Q1 1 n-channel MOSFET (SOT23)

Central Semi 2N7002

R1, R7, R9–

R14, R31, R32,

R33, R56, R59,

R60, R61

15 0I Q5% resistors (0402)

R2, R15, R16,

R29 0 Not installed, resistors (0402)

R3 1 1MI Q5% resistor (0603)

R4, R28 2 10kI Q5% resistors (0603)

R5 1 10kI Q5% resistor (0402)

R6 1 1kI Q5% resistor (0603)

R17 1 402I Q1% resistor (0603)

R18 1 47kI Q5% resistor (0603)

R19, R20 2 220I Q5% resistors (0603)

R21, R22, R23 3 1.5kI Q5% resistors (0603)

R24, R25 2 27I Q5% resistors (0603)

R26 1 470I Q5% resistor (0603)

R27 1 2.2kI Q5% resistor (0603)

R34, R37 2 1.5kI Q5% resistors (0402)

R35, R36, R39,

R41, R42, R43 622I Q5% resistors (0402)

R38 1 1MI Q5% resistor (0402)

R50, R53 2 0I Q5% resistors (0603)

R54, R55, R57,

R58 42.2kI Q5% resistors (0402)

DESIGNATION QTY DESCRIPTION

SPKLN, SPKRN 2 Black multipurpose test points

U1 1 Stereo audio codec (63 WLP)

Maxim MAX98088EWY+

U2 1

1.8V low-noise linear regulator

(5 SC70)

Maxim MAX8510EXK18+

(Top Mark: AEA)

U3 1

1.8V low-noise linear regulator

(5 SOT23)

Maxim MAX8887EZK18+

(Top Mark: ADPX)

U4 1 Digital audio transceiver (28 SO)

Cirrus Logic CS8427-CSZ

U5 1 USB audio codec (32 QFP)

Texas Instruments PCM2707PJT

U7 1 UART-to-USB converter (32 QFN)

U8 1

Low-power microcontroller

(56 TQFN-EP*)

Maxim MAXQ2000-RBX+

U9, U16 2

3.3V low-noise linear regulators

(5 SC70)

Maxim MAX8511EXK33+

(Top Mark: AEI)

U10 1

93C46 type 3-wire EEPROM

16-bit architecture

(8 SO)

U11 1

2.5V low-noise linear regulator

(5 SC70)

Maxim MAX8511EXK25+

(Top Mark: ADV)

U12 1

Digital microphone (6 LGA)

Akustica AKU2002C

(Top Mark: A2002C)

U13 0

Not installed, digital

microphone (6 LGA)

Akustica AKU2002C

U14, U17 2 Dual SPDT switches (10 FDFN)

Maxim MAX4906ELB+

Y2 1 13MHz crystal oscillator

(2.5mm x 2.0mm)

Y3 1 16MHz crystal

(3.2mm x 2.5mm)

MAX98088 Evaluation Kit

Evaluates: MAX98088

4 ______________________________________________________________________________________

Component List (continued)

*EP = Exposed pad.

Component Suppliers

MAX98088 EV Kit Files

Note: Indicate that you are using the MAX98088 when contacting these component suppliers.

SUPPLIER PHONE WEBSITE

Central Semiconductor Corp. 631-435-1110 www.centralsemi.com

Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com

Hong Kong X'tals Ltd 852-35112388 www.hongkongcrystal.com

KEMET Corp. 864-963-6300 www.kemet.com

Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com

Taiyo Yuden 800-348-2496 www.t-yuden.com

TDK Corp. 847-803-6100 www.component.tdk.com

TOKO America, Inc. 847-297-0070 www.tokoam.com

FILE DESCRIPTION

INSTALL.EXE Installs the EV kit files on your computer

CDM20600.EXE USB driver installer

CDSM2.06.00WHQLCertified.ZIP USB driver

Device Manager Shortcut to device manager

USB_Driver_Help_200.PDF USB driver installation help file

DESIGNATION QTY DESCRIPTION

Y4 1 12MHz crystal

(3.2mm x 2.5mm)

Y5 1

6MHz crystal (HC49)

Hong Kong X’tals

SSL60000N1HK188F0-0

— 4

22FH, 1A inductor

(6.2mm x 6.3mm)

TOKO #A916C4-220M

DESIGNATION QTY DESCRIPTION

— 2 USB high-speed A-to-mini-B

cables, 6ft

— 27 Shunts

— 1 PCB: MAX98088 EVALUATION

KIT+

MAX98088 Evaluation Kit

Evaluates: MAX98088

_______________________________________________________________________________________ 5

Quick Start

Required Equipment

• MAX98088 EV kit (USB cables included)

• User-supplied Windows XP, Windows Vista, or

Windows 7 PC with two available USB ports

• 2.8V to 5.5V, 1A DC power supply

• Set of headphones with a 3.5mm plug

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 EV kit is fully assembled and tested. Follow the steps

below to configure the EV kit for audio playback and con-

trol from the PC to verify the EV kit is functioning properly.

1) Visit www.maxim-ic.com/evkitsoftware to down-

load the latest version of the EV kit software,

98088Rxx.ZIP. Save the EV kit software to a tempo-

rary folder and uncompress the ZIP file.

2) Install the EV kit software on your computer by

running the INSTALL.EXE program inside the tem-

porary folder. The program files are copied and

icons are created in the Windows Start | Programs

| Maxim EVKIT Software menu.

3) Verify that all jumpers are in their default positions,

as shown in Table 1.

4) Connect the power supply between the SPKVDD

and GND PCB pads.

5) Set the power supply to 3.7V and turn it on.

6) Connect a USB cable between the PC and J1 on

the EV kit. 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

privileges are required to install the USB device

driver on Windows.

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\MAX98088 (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_200.PDF

document included with the software for additional

information.

8) Start the MAX98088 EV kit software by opening

its icon in the Start | Programs | Maxim EVKIT

Software menu. The EV kit software main window

appears, as shown in Figure 1.

9) Wait while the software connects to the EV kit. Once

the connection is established, the status bar at the

bottom displays USB Connected and MAX98088

Connected.

10) Once the EV kit software has initialized, select the

Block Diagram tab.

11) Click on the USB block.

12) Click Yes to automatically configure the EV kit for

USB audio playback.

13) Connect a USB cable between the PC and J10.

Windows automatically detects the EV kit has a

sound card and installs the USB audio class driv-

ers. A USB DAC option is added to the list of avail-

able playback devices. All audio played through

this device is sent to the IC.

14) Connect headphones to the headphone jack (J2) to

hear audio generated by the PC.

MAX98088 Evaluation Kit

Evaluates: MAX98088

6 ______________________________________________________________________________________

Detailed Description of Software

Graphical User Interface

The MAX98088 EV kit software uses a block diagram

interface to control all the functions of the MAX98088

audio codec. Click on blocks on the Block Diagram tab

(Figure 2) to control various functions of the IC. Each

block that represents multiple control options displays a

dialog box containing all available controls for that block.

Blocks that represent a single option toggle the enable

of that function when clicked. Blocks colored grey are

disabled while blocks colored blue are enabled. Click on

the MAX98088 Power button to enable/disable the IC.

The icon is shaded grey when the IC is in shutdown. The

icon is shaded blue when the IC is enabled.

To view the IC’s register settings, select the Control

Registers tab (Figure 3). The value of all control registers

is displayed and updated automatically when changes

are made using the graphical user interface (GUI). Click

on bit names or enter register values in hexadecimal for-

mat to manually program the IC’s registers. Changes to

the register map automatically update the GUI.

Figure 2. MAX98088 EV Kit Software Main Window (Block Diagram Tab)

MAX98088 Evaluation Kit

Evaluates: MAX98088

_______________________________________________________________________________________ 7

Figure 3. MAX98088 EV Kit Software Main Window (Control Registers Tab)

MAX98088 Evaluation Kit

Evaluates: MAX98088

8 ______________________________________________________________________________________

Global Control Buttons

Buttons at the top of the EV kit software window control

the connection and synchronization of the software with

the IC.

Press Reset to restore the EV kit to power-on default set-

tings. Uncheck options that need not be reset.

Press Connect to reconnect to the EV kit after the soft-

ware is started. The Connect button is disabled when

the software is already connected to the EV kit. The

Connect button is used primarily if the EV kit is con-

nected to the PC after the software is already running.

File Menu

The EV kit software can save its state to a configuration

file for loading at a later time. Select the Save Settings

menu item from the File menu bar to save the current

configuration. A Save As dialog box appears to allow the

location for the saved file to be selected. Files are saved

with the extension .ax26.

Select Load Settings to revert to a saved configuration.

An Open dialog box appears to allow the location of

the saved configuration file to be specified. The default

directory lists several presaved options. Alternatively,

.ax26 files are associated with the EV kit software.

Double click on a saved file to launch the EV kit software

and load the saved configuration.

Select Exit to exit the software.

View Menu

The Show S/PDIF Transceiver Registers menu item

under the View menu bar displays a new tab sheet for

manually controlling the CS8427.

Options Menu

When the Auto Connect menu item is selected from the

Options menu bar, the software automatically connects

to the EV kit board as soon as the connection is avail-

able.

When Auto Read Status is selected, the software auto-

matically reads the device registers every 1000ms.

The I2C Clock Speed submenu item selects the speed

of the I2C interface as either 400kHz or 100kHz.

Configure MCLK Routing selects which clock source is

connected to the IC.

Tools Menu

Select the Debug Tools menu item under the Tools

menu bar to directly send I2C commands to the EV kit.

Select Export Register Setup File to export the value of

all registers set to a nondefault setting.

Select Read All Registers to update the software set-

tings with the register settings of the connected EV kit.

This option is useful if the EV kit software is restarted

without power cycling the EV kit.

Select Write All Registers to download all software set-

tings to the connected EV kit. This option is useful when

power has been removed from the IC. Pressing the Write

All Registers button is only necessary when the IC’s

entire register bank needs updating. Individual register

changes are made automatically.

Detailed Description of Hardware

The MAX98088 EV kit evaluates the MAX98088 audio

codec and provides access to all analog and digital

inputs/outputs on the device. In addition, the EV kit

includes support circuitry that eases evaluation of the

device.

Power Supplies

The EV kit requires a single 2.8V to 5.5V external supply

to operate. For evaluation other than power consump-

tion, all other supplies are generated from USB bus

power. Jumpers JU14–JU17, and JU22 (see Table 1)

allow all supplies on the IC to be disconnected from USB

bus power and powered externally. This allows varying

the supply voltage and performing supply current mea-

surements.

Class D Filters

The IC integrates stereo Class D amplifiers. Although

these amplifiers are designed to operate completely fil-

terless, filters are often helpful during evaluation. Stuffing

options for two types of filters are provided on the EV kit.

When long speaker cables are used with the IC, a

ferrite bead plus capacitor filter can be installed to

prevent excessive EMI radiation. Although it is best to

choose filter components based on EMI test results,

the combination of a 680pF capacitor with the Murata

BLM18SG331TN1 ferrite bead generally works well.

To allow analysis of the audio output with an oscillo-

scope, or an analyzer not designed to accept Cass D

switching waveforms, populate L2–L5 with the included

22FH inductors and make connections to external equip-

ment and speakers at FSPKLP, FSPKLN, FSPKRP, and

FSPKRN. The LC filter is designed to work best with an

8ω load. Do not connect the load at SPKLP, SPKLN,

SPKRP, and SPKRN when L2–L5 are installed.

MAX98088 Evaluation Kit

Evaluates: MAX98088

_______________________________________________________________________________________ 9

S/PDIF Transceiver

The CS8427 S/PDIF transceiver serves as a format con-

verter between I2S and S/PDIF. Use this device to send

and receive digital audio over the optical connectors

(J5, J6).

When receiving S/PDIF data, the CS8427 outputs a

recovered master clock that is exactly 256 x fS, where

fS is the sample rate. This clock signal can be used to

clock the IC.

When transmitting S/PDIF data, the CS8427 requires a

master-clock input. If S/PDIF data is also being received,

the CS8427 uses this data to generate its own master

clock. If S/PDIF data is not being received, then the

CS8427 generates a master clock based on the LRCLK

signal being output by the IC. For proper transmit-only

operation, the IC must be configured in master mode.

USB Audio

The PCM2707 USB DAC generates I2S audio data from

a USB connection to the PC. The PCM2707 supports

standard class drivers that are included in most operat-

ing systems. As a result, no drivers are required for this

device. The PCM2707 appears as a sound card in the

PC and allows audio playback from the PC through the

IC. The PCM2707 also generates a master-clock signal

that can be used to clock the IC. The clock signal is 256

x fS.

Digital Microphone

The EV kit includes an on-board digital microphone

to demonstrate the digital microphone input. Install

shunts on jumpers JU27 and JU32 to enable the

microphone. When using the digital microphone, the

MIC1 analog microphone input cannot be used. If a

second digital microphone is added, then MIC2 is also

unavailable.

Jumper Selection

The EV kit includes 20 jumpers to adjust various hard-

ware configuration options. Table 1 describes all the

jumpers available on the EV kit.

Table 1. Jumper Selection

JUMPER SHUNT POSITION DESCRIPTION

JU12 — See Table 2

JU13 — See Table 3

JU14 1-2* Connects 1.8V to DVDD

Open Allows external powering of DVDD

JU15 1-2* Connects 1.8V to AVDD

Open Allows external powering of AVDD

JU16 1-2* Connects 1.8V to HPVDD

Open Allows external powering of HPVDD

JU17 1-2* Connects 3.3V to DVDDS1

Open Allows external powering of DVDDS1

JU19 — See Table 3

JU20 2-3*, 5-6* Connects the on-board I2C master to the IC

Open Allows external control of the IC over I2C

JU22 1-2* Connects 3.3V to DVDDS2

Open Allows external powering of DVDDS2

JU27 1-2 Connects the digital microphone data output to the IC

Open* Disconnects the digital microphone data output from the IC

JU28 1-2* Connects the MAX98088 interrupt output (IRQ) to the on-board microcontroller

Open Disconnects the MAX98088 interrupt output (IRQ) to the on-board microcontroller

JU30 1-2 Connects JACKSNS to MIC1 for jack detection

Open* Disconnects JACKSNS from MIC1

JU32 1-2 Connects the digital microphone clock input to the IC

Open* Disconnects the digital microphone clock input from the IC

MAX98088 Evaluation Kit

Evaluates: MAX98088

10 _____________________________________________________________________________________

Table 1. Jumper Selection (continued)

Table 2. MAX98088 Clock Sources (JU12)

*Default position.

Master Clock Selection

Jumper JU12 selects which master-clock source clocks

the IC. The available clocks are shown in Table 2. The

EV kit software indicates the correct clock source to use

depending on which audio source is in use. If an external

audio source is used, choose either the on-board 13MHz

oscillator or an external clock. To connect the external

clock, remove the shunt from JU12 and connect the

clock to the center pin.

Digital Audio Interface

Jumpers JU13 and JU19 provide access to the digital

audio interfaces on the IC. See Table 3 for individual pin

descriptions. When using the on-board USB and S/PDIF

audio sources, install shunts between pins 2-3 on each

row. When using an external audio source, remove the

shunts and connect the audio source clock and data

lines to position 2 of the header. Position 1 on each row

provides a convenient ground connection.

Control Interface

Jumper JU20 connects the on-board I2C master to the

IC. When using an external I2C master, remove both

shunts from JU20 and connect position 1 to SDA and

SCL on the external I2C master. Install pullup resistors

at R15 and R16 if the external master does not include

pullup resistors.

Microphone Bias and Jack Sense

Jumpers JU34–JU37, JU40, and JU41 provide micro-

phone biasing on MIC1 and MIC2. To provide micro-

phone bias, install a shunt on JU40 and JU41. For single-

ended microphone inputs, install shunts on JU36 and

JU37. For differential microphone inputs, install shunts

on JU34 and JU35.

To enable microphone detection on MIC1, install a shunt

on JU30.

*Default position.

JUMPER SHUNT POSITION DESCRIPTION

JU34 1-2 Connects a 2.2kI resistor from MIC1N to ground for microphone biasing

Open* Disconnects MIC1N from ground

JU35 1-2 Connects a 2.2kI resistor from MIC2N to ground for microphone biasing

Open* Disconnects MIC2N from ground

JU36 1-2 Grounds MIC1N for single-ended operation on MIC1

Open* Enables differential operation on MIC1

JU37 1-2 Grounds MIC2N for single-ended operation on MIC2

Open* Enables differential operation on MIC2

JU40 1-2 Connects MIC1P to MICBIAS through a 2.2kI resistor

Open* Disconnects MIC1P from MICBIAS

JU41 1-2 Connects MIC2P to MICBIAS through a 2.2kI resistor

Open* Disconnects MIC2P from MICBIAS

JU42 1-2* Allows software to sense that a voltage is applied to SPKVDD (through SPKVDD_

POWERED net driving the MAXQ2000)

Open Disconnects Q1 for accurate SPKVDD supply current measurement

SHUNT POSITION CLOCK SOURCE

1-2 Disabled

1-3 13MHz oscillator

1-4* Software-selected clock source

MAX98088 Evaluation Kit

Evaluates: MAX98088

______________________________________________________________________________________ 11

Table 3. Digital Audio Interface (JU13, JU19)

Note: Default shunt position is between pins 2-3 for all rows.

JUMPER POSITION 1 POSITION 2 POSITION 3

JU13

GND BCLKS1 (IC) BCLK (S/PDIF)

GND LRCLKS1 (IC) LRCLK (S/PDIF)

GND SDINS1 (IC) DAC input (S/PDIF)

GND SDOUTS1 (IC) ADC output (S/PDIF)

JU19

GND BCLKS2 (IC) BCLK (USB audio)

GND LRCLKS2 (IC) LRCLK (USB audio)

GND SDINS2 (IC) DAC input (USB audio)

GND SDOUTS2 (IC) ADC output (USB audio)

MAX98088 Evaluation Kit

Evaluates: MAX98088

12 _____________________________________________________________________________________

Figure 4a. MAX98088 EV Kit Schematic (Sheet 1 of 5)

MAX98088 Evaluation Kit

Evaluates: MAX98088

______________________________________________________________________________________ 13

Figure 4b. MAX98088 EV Kit Schematic (Sheet 2 of 5)

MAX98088 Evaluation Kit

Evaluates: MAX98088

14 _____________________________________________________________________________________

Figure 4c. MAX98088 EV Kit Schematic (Sheet 3 of 5)

MAX98088 Evaluation Kit

Evaluates: MAX98088

______________________________________________________________________________________ 15

Figure 4d. MAX98088 EV Kit Schematic (Sheet 4 of 5)

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Figure 4e. MAX98088 EV Kit Schematic (Sheet 5 of 5)

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Figure 5. MAX98088 EV Kit Component Placement Guide—Component Side

1.0”

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Figure 6. MAX98088 EV Kit PCB Layout—Component Side

1.0”

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Figure 7. MAX98088 EV Kit PCB Layout—Ground Layer 2

1.0”

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Figure 8. MAX98088 EV Kit PCB Layout—Ground Layer 3

1.0”

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Figure 9. MAX98088 EV Kit PCB Layout—Power Layer 4

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Figure 10. MAX98088 EV Kit PCB Layout—Ground Layer 5

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Figure 11. MAX98088 EV Kit PCB Layout—Solder Side

1.0”

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.

24 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

MAX98088 Evaluation Kit

Evaluates: MAX98088

Revision History

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NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

0 8/10 Initial release —